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MCP1790/MCP1791
70 mA, High Voltage Regulator
Features
* 48V (43.5V 10%) load dump protected for 180ms with a 30 second repetition rate (FORD Test Pulse G Loaded) * Wide steady state supply voltage, 6.0V - 30.0V * Extended Junction Temperature Range: -40 to +125C * Fixed output voltages: 3.0V, 3.3V, 5.0V * Low quiescent current: 70 A typical * Low shutdown quiescent current: 10 A typical * Output Voltage Tolerances of 2.5% over the temperature range * Maximum output current of 70 mA @ +125C Junction Temperature * Maximum continuous input voltage of 30V * Internal thermal overload protection, +157C (typical) Junction Temperature * Internal short circuit current limit, 120 mA (typical) for +5V option. * Short Circuit Current Foldback * Shutdown Input option (MCP1791) * Power Good Output option (MCP1791) * High PSRR, -90 dB@100 Hz (typical) * Stable with 1 F to 1000 F Tantalum and Electrolytic Capacitors * Stable with 4.7 F to 1000 F Ceramic Capacitors
General Description
The MCP1790/MCP1791 regulator provides up to 70 mA of current. The input operating voltage range is specified from 6.0V to 30V continuous, 48V absolute max, making it ideal for automotive and commercial 12/24 VDC systems. The MCP1790/MCP1791 has a tight tolerance output voltage load regulation of 0.2% (typical) and a very good line regulation at 0.0002%/V (typical). The regulator output is stable with ceramic, tantalum, and electrolytic capacitors. The MCP1790/MCP1791 regulator incorporates both thermal and short circuit protection. The MCP1790 is the 3-pin version of the MCP1790/ MCP1791 family. The MCP1791 is the 5-pin version and incorporates a Shutdown input signal and a Power Good output signal. The regulator is specifically designed to operate in the automotive environment and will survive +48V (43.5V 10%) load dump transients and double-battery jumps. The device is designed to meet the stringent quiescent current requirements of the automotive industry. The device is also designed for the commercial low voltage fire alarm/detector systems which use 24 VDC to supply the required alarms throughout buildings. The low ground current, 110 A (typ.), of the CMOS device will provide a power cost savings to the end users over similar bipolar devices. Typical buildings using hundreds of 24V powered fire and smoke detectors can see substantial savings on energy consumption and wiring gage reduction compared to bipolar regulators. The MCP1790 device will be offered in the 3-pin DD-PAK, and SOT-223 packages. The MCP1791 device will be offered in the 5-pin DD-PAK, and SOT-223 packages. The MCP1790/MCP1791 will have a junction temperature operating range of -40C to +125C.
Applications
* Low Voltage A/C powered (24VAC) Fire Alarms, CO2 Sensors, HVAC Controls * Automotive Electronics * Automotive Accessory Power Adapters * Electronic Thermostat Controls * Microcontroller power
(c) 2008 Microchip Technology Inc.
DS22075A-page 1
MCP1790/MCP1791
Package Types
MCP1790 DDPAK-3 SOT-223-3
4
MCP1791 DDPAK-5 SOT-223-5
6
1
2
3 1 2 3 12345 1 2 3 4 5
Pin 1 2 3 4 VIN GND (TAB) VOUT GND (TAB)
Pin 1 2 3 4 5 6 SHDN VIN GND (TAB) VOUT PWRGD GND (TAB)
DS22075A-page 2
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
TYPICAL APPLICATION
MCP1791 R1 100 k SHDN VIN = 6V to 30V C1 4.7 F VIN 1 GND VOUT
PWRGD
On Off
VOUT = 5.0V @ 70 mA
C2 1 F Tantalum
MCP1790
1 VIN = 8.0V to 16V 5 VIN C1 1.0 F GND VOUT VOUT = 3.3V @ 70 mA
C2 1.0 F Tantalum
(c) 2008 Microchip Technology Inc.
DS22075A-page 3
MCP1790/MCP1791
1.0 ELECTRICAL CHARACTERISTICS
Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
Absolute Maximum Ratings
Input Voltage, VIN .........................................................+48.0V VIN, PWRGD, SHDN .....................(GND-0.3V) to (VIN+0.3V) VOUT .................................................. (GND-0.3V) to (+5.5V) Internal Power Dissipation ............ Internally-Limited (Note 4) Output Short Circuit Current..................................Continuous Storage temperature .....................................-55C to +150C Maximum Junction Temperature .....................165C (Note 7) Operating Junction Temperature...................-40C to +125C ESD protection on all pins .......... 6 kV HBM and 400V MM
AC/DC CHARACTERISTICS
Electrical Specifications: Unless otherwise noted, VIN = VOUT(MAX) + VDROPOUT(MAX), (Note 1), IOUT = 1 mA, COUT = 4.7 F (X7R Ceramic), CIN = 4.7 F (X7R Ceramic), TA = +25C, SHDN > 2.4V. Boldface type applies for junction temperatures, TJ (Note 5) of -40C to +125C. Parameters Input Operating Voltage Input Quiescent Current Input Quiescent Current for SHDN Mode Ground Current Maximum Output Current Line Regulation Load Regulation Output Peak Short Circuit Current Output Voltage Regulation VOUT Temperature Coefficient Input Voltage to Turn On Output Note 1: 2: 3: 4: Symbol VIN Iq ISHDN IGND IOUT VOUT/ (VOUTXVIN) VOUT/VOUT IOUT_SC VOUT TCVOUT VON Min 6.0 -- -- -- 70 -- -0.45 -- VR-2.5% -- -- Typ -- 70 10 110 -- 0.0002 0.2 VR/10 VR 65 5.5 Max 30.0 130 25 210 -- 0.05 0.45 -- VR+2.5% -- 6.0 Units V A A A mA %/V % A V ppm/C V 6.0V < VIN < 30V IOUT = 1 mA to 70 mA (Note 3) RLOAD < 0.1 , Peak Current 6.0V < VIN < 30V Note 9 Rising VIN Conditions +48VDC Load Dump Peak < 500 ms IL = 0 mA SHDN = GND IL = 70 mA
5:
6: 7: 8:
9:
The minimum VIN, VIN(MIN) must meet two conditions: VIN 6.0V and VIN VOUT(MAX) + VDROPOUT(MAX). VR is the nominal regulator output voltage. Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range from 1 mA to the maximum specified output current. The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air. (i.e., TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum 165C rating. Sustained junction temperatures above 165C can impact the device reliability. The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the desired Junction temperature. The test time is small enough such that the rise in the Junction temperature over the ambient temperature is not significant. Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its nominal value that was measured with an input voltage of VIN = VR + VDROPOUT(MAX). Sustained junction temperatures above 165C can impact the device reliability. The Short Circuit Recovery Time test is done by placing the device into a short circuit condition and then removing the short circuit condition before the device die temperature reaches 125 C. If the device goes into thermal shutdown, then the Short Circuit Recovery Time will depend upon the thermal dissipation properties of the package and circuit board. TCVOUT = (VOUT-HIGH - VOUT-LOW) *10^6 / (VR * Temperature), VOUT-HIGH = highest voltage measured over the temperaturerange. VOUT-LOW = lowest voltage measured over the temperature range.
DS22075A-page 4
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
AC/DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise noted, VIN = VOUT(MAX) + VDROPOUT(MAX), (Note 1), IOUT = 1 mA, COUT = 4.7 F (X7R Ceramic), CIN = 4.7 F (X7R Ceramic), TA = +25C, SHDN > 2.4V. Boldface type applies for junction temperatures, TJ (Note 5) of -40C to +125C. Parameters Short Circuit Foldback Voltage Corner Symbol VFOLDBACK Min -- -- -- Short Circuit Foldback Current -- Typ 4.2 3.0 2.7 105 Max -- -- -- -- Units V V V mA Conditions VR = 5.0V Falling VOUT, RLOAD < 0.1 VR = 3.3V Falling VOUT, RLOAD < 0.1 VR = 3.0V Falling VOUT, RLOAD < 0.1 VOUT ~= 0V, RLOAD < 0.1 , VR = 5.0V (Note 2) VR = 3.3V (Note 2) VR = 3.0V (Note 2) IOUT = 70 mA, (Note 6) VR = 5.0V, VIN = 4.500V VR = 3.3V, VIN = 4.500V VR = 3.0V, VIN = 4.500V
-- -- Startup Voltage Overshoot Dropout Voltage Dropout Current IOUT = 0 mA Shutdown Input Logic High Input Logic Low Input Shutdown Input Leakage Current Power Good Characteristics PWRGD Input Voltage Operating Range PWRGD Threshold Voltage (Referenced to VOUT) PWRGD Threshold Hysteresis PWRGD Output Voltage LOW PWRGD Output Sink Current PWRGD Leakage PWRGD Time Delay Note 1: 2: 3: 4: VPWRGD_VIN VPWRGD_TH VPWRGD_HYS VPWRGD_L IPWRGD_L IPWRGD_LK TPG 2.8 88 1.0 -- 5.0 -- -- VSHDN-HIGH VSHDN-LOW SHDNILK 2.4 0 -- -- VOVER VDROPOUT IDO -- -- -- -- --
99 99 0.10 700 130 75 75 -- -- 0.100 3.0 -- 90 2.0 0.2 -- 1.0 30
-- -- -- 1300 -- -- -- VIN(MAX) 0.8 0.500 5.0 -- 92 3.0 0.4 -- -- --
mA mA mV A A A V V A
% VOUT VIN = 0V to 6.0V
SHDN = GND SHDN = 6V
V %VOUT %VOUT V mA nA s Falling Edge of VOUT Rising Edge of VOUT IPWRGD SINK = 5.0 mA, VOUT = 0V VPWRGD <= 0.4V VPWRGD = VIN = 6.0V Rising Edge
5:
6: 7: 8:
9:
The minimum VIN, VIN(MIN) must meet two conditions: VIN 6.0V and VIN VOUT(MAX) + VDROPOUT(MAX). VR is the nominal regulator output voltage. Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range from 1 mA to the maximum specified output current. The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air. (i.e., TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum 165C rating. Sustained junction temperatures above 165C can impact the device reliability. The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the desired Junction temperature. The test time is small enough such that the rise in the Junction temperature over the ambient temperature is not significant. Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its nominal value that was measured with an input voltage of VIN = VR + VDROPOUT(MAX). Sustained junction temperatures above 165C can impact the device reliability. The Short Circuit Recovery Time test is done by placing the device into a short circuit condition and then removing the short circuit condition before the device die temperature reaches 125 C. If the device goes into thermal shutdown, then the Short Circuit Recovery Time will depend upon the thermal dissipation properties of the package and circuit board. TCVOUT = (VOUT-HIGH - VOUT-LOW) *10^6 / (VR * Temperature), VOUT-HIGH = highest voltage measured over the temperaturerange. VOUT-LOW = lowest voltage measured over the temperature range.
(c) 2008 Microchip Technology Inc.
DS22075A-page 5
MCP1790/MCP1791
AC/DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise noted, VIN = VOUT(MAX) + VDROPOUT(MAX), (Note 1), IOUT = 1 mA, COUT = 4.7 F (X7R Ceramic), CIN = 4.7 F (X7R Ceramic), TA = +25C, SHDN > 2.4V. Boldface type applies for junction temperatures, TJ (Note 5) of -40C to +125C. Parameters Detect Threshold to PWRGD Active Time Delay AC Performance Output Delay From SHDN TOR -- 200 -- s SHDN = GND to VIN, VOUT = GND to 95% VR, COUT = 1.0 F SHDN = VIN to GND, COUT = 1.0 F VIN = 7.0V, CIN = 0 F, IOUT = 10 mA, VINAC = 400 mVpp f = 100 Hz f = 1 kHz, VR = 5.0V f = 1 kHz, VR = < 5.0V C C ms Rising Temperature Falling Temperature (Note 8) Symbol TVDET-PWRG
D
Min --
Typ 235
Max --
Units s
Conditions VOUT = VPWRGD_TH + 100 mV to VPWRGD_TH 100 mV
PWRGD Delay from SHDN Output Noise Power Supply Ripple Rejection Ratio
TSHDN_PG eN PSRR
-- --
400 1.2
-- --
ns
V/Hz) IOUT = 50 mA, f = 1 kHz dB
-- -- -- Thermal Shutdown Temperature Thermal Shutdown Hysteresis Short Circuit Recovery Time Note 1: 2: 3: 4: TSD TSD tTHERM -- -- --
90 75 80 157 20 0
-- -- -- -- -- --
5:
6: 7: 8:
9:
The minimum VIN, VIN(MIN) must meet two conditions: VIN 6.0V and VIN VOUT(MAX) + VDROPOUT(MAX). VR is the nominal regulator output voltage. Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range from 1 mA to the maximum specified output current. The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air. (i.e., TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum 165C rating. Sustained junction temperatures above 165C can impact the device reliability. The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the desired Junction temperature. The test time is small enough such that the rise in the Junction temperature over the ambient temperature is not significant. Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its nominal value that was measured with an input voltage of VIN = VR + VDROPOUT(MAX). Sustained junction temperatures above 165C can impact the device reliability. The Short Circuit Recovery Time test is done by placing the device into a short circuit condition and then removing the short circuit condition before the device die temperature reaches 125 C. If the device goes into thermal shutdown, then the Short Circuit Recovery Time will depend upon the thermal dissipation properties of the package and circuit board. TCVOUT = (VOUT-HIGH - VOUT-LOW) *10^6 / (VR * Temperature), VOUT-HIGH = highest voltage measured over the temperaturerange. VOUT-LOW = lowest voltage measured over the temperature range.
DS22075A-page 6
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
TEMPERATURE SPECIFICATIONS
Parameters Temperature Ranges Specified Temperature Range Operating Temperature Range Storage Temperature Range Package Thermal Resistances Thermal Resistance, 3LD DDPAK Thermal Resistance, 3LD SOT-223 Thermal Resistance, 5LD DDPAK Thermal Resistance, 5LD SOT-223 JA JC JA JC JA JC JA JC -- -- -- -- 31.4 3 62 15 31.4 3 62 15 -- -- -- -- C/W C/W C/W C/W EIA/JEDEC JESD51-751-7 4 Layer Board EIA/JEDEC JESD51-751-7 4 Layer Board EIA/JEDEC JESD51-751-7 4 Layer Board EIA/JEDEC JESD51-751-7 4 Layer Board TJ TJ TJ -40 -40 -55 +125 +125 +150 C C C Symbol Min Typ Max Units Conditions
(c) 2008 Microchip Technology Inc.
DS22075A-page 7
MCP1790/MCP1791
2.0
Note:
TYPICAL PERFORMANCE CHARACTERISTICS
The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, COUT = 4.7 uF Ceramic (X7R), CIN = 10.0 F Ceramic (X7R), IOUT = 1 mA, Temperature = +25C,
VIN = 6.0V, RPWRGD_PULLUP = 10 k To VOUT, VSHDN = VIN, and device is MCP1790.
Note: Junction Temperature (TJ) is approximated by soaking the device under test to an ambient temperature equal to the desired
junction temperature. The test time is small enough such that the rise in Junction Temperature over the Ambient temperature is not significant.
50 PWRGD Time Delay (s) 40 30 20 10 0 -45 -20 5 30 55 80
VIN = 6V
Quiescent Current (A)
VOUT = 5.0V IOUT = 0 A VIN = 10V,15V,25V,30V
120.00 100.00 80.00 60.00 40.00 20.00 0.00
VOUT = 3.3V
VIN = 6V IOUT = 0A
VOUT = 3.0V
VOUT = 5.0V
105
130
-45
-20
5
30
55
80
105
130
Temperature (C)
Junction Temperature (C)
FIGURE 2-1: Power Good Time Delay vs. Temperature (MCP1791).
140 Quiescent Current (A) 120 100 80 60 40 20 0 0 5 10 15 20 25 30 35 Input Voltage (V)
+130C +90C +25C 0C -45C
FIGURE 2-4: Quiescent Current vs. Junction Temperature.
140 120 GND Current (A) 100 80 60 40 20 0 0 10 20 30 40 50 60 70 Load Current (mA)
VOUT = 5.0V VOUT = 3.0V
VOUT = 3.3V IOUT = 0 A
VOUT = 3.3V
FIGURE 2-2: Voltage.
140 Quiescent Current (A) 120 100 80 60 40 20 0 0 5 10
+130C +90C +25C 0C -45C
Quiescent Current vs. Input
FIGURE 2-5: Current.
28 24 20 ISHDN (A) 16 12 8 4 0
VIN = 10V, 30V
Ground Current vs. Load
VOUT = 5.0V IOUT = 0 A
VREG = 3.0V VSHDN = 0V
VIN = 6.0V
15
20
25
30
35
-45
-20
5
30
55
80
105
130
Input Voltage (V)
Temperature (C)
FIGURE 2-3: Voltage.
DS22075A-page 8
Quiescent Current vs. Input
FIGURE 2-6:
ISHDN vs Temperature.
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
Note: Unless otherwise indicated, COUT = 4.7 uF Ceramic (X7R), CIN = 10.0 F Ceramic (X7R), IOUT = 1 mA, Temperature = +25C, VIN = 6.0V, RPWRGD_PULLUP = 10 k To VOUT, VSHDN = VIN, and device is MCP1790.
0.006 Line Regulation (%/V) 0.004 0.002 0.000 -0.002 -0.004 -0.006 -45 -20 5 30 55 80 105 130 Temperature (C)
70 mA 10 mA 0 mA
Output Voltage (V)
VOUT = 3.3V VIN = 6V to 30V
5.04 5.03 5.02 5.01 5.00 4.99 4.98 4.97 4.96 4.95 4.94 0
VOUT = 5.0V VIN = 6.3V
-45C
0C
+25C
+90C
+130C
10
20
30
40
50
60
70
Load Current (mA)
FIGURE 2-7: Temperature.
0.006 Line Regulation (%/V) 0.004 0.002 0.000 -0.002 -0.004 -0.006 -45 -20
30 mA 0 mA
Line Regulation vs.
FIGURE 2-10: Current.
1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 10 20
Output Voltage vs. Load
Dropout Voltage (V)
VOUT = 5.0V VIN = 6V to 30V
VOUT = 5.0V +130C +90C
70 mA
-45C
0C
+25C
5
30
55
80
105
130
30
40
50
60
70
Temperature (C)
Load Current (mA)
FIGURE 2-8: Temperature.
0.00 -0.05 Load Regulation (%) -0.10 -0.15 -0.20 -0.25 -0.30 -45 -20
Line Regulation vs.
FIGURE 2-11: Current.
1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 -45 -20 5
Dropout Voltage vs. Load
ILOAD = 1 mA to 70 mA VREG=5.0V
VOUT = 5.0V 70 mA
Dropout Voltage (V)
VREG=3.3V VREG=3.0V
50 mA 30 mA 10 mA 1 mA
5
30
55
80
105
130
30
55
80
105
130
Temperature (C)
Temperature (C)
FIGURE 2-9: Temperature.
Load Regulation vs.
FIGURE 2-12: Temperature.
Dropout Voltage vs.
(c) 2008 Microchip Technology Inc.
DS22075A-page 9
MCP1790/MCP1791
Note: Unless otherwise indicated, COUT = 4.7 uF Ceramic (X7R), CIN = 10.0 F Ceramic (X7R), IOUT = 1 mA, Temperature = +25C,
VIN = 6.0V, RPWRGD_PULLUP = 10 k To VOUT, VSHDN = VIN, and device is MCP1790.
Short Circuit Current (mA)
130 125
ROUT < 0.1
115 110 105 100 6 10
VOUT = 3.0V
VOUT = 3.3V
14
18
22
26
30
PSRR (dB)
120
VOUT = 5.0V
Input Voltage (V)
-20 VR=5.0V -30 VIN=7.0V -40 VINAC = 400 mV p-p -50 CIN=0 F -60 IOUT=10 mA -70 -80 -90 -100 -110 -120 0.01 0.1 1 10 Frequency (kHz)
100
1000
FIGURE 2-13: Input Voltage.
Short Circuit Current vs
FIGURE 2-16: Power Supply Ripple Rejection vs. Frequency.
10.00
VR=5.0V IOUT=50mA
Noise (V/ Hz)
1.00
VR=3.3V
0.10
0.01
0.00 0.01
0.1
1 10 Frequency (kHz)
100
1000
FIGURE 2-14: Output Noise Voltage Density vs. Frequency.
-20 -30 -40 PSRR (dB) -50 -60 -70 -80 -90 -100 -110 0.01 0.1 1 10 Frequency (kHz) 100 1000
FIGURE 2-17: (MCP1791).
Startup from VIN
VR=3.3V VIN=7.0V VINAC = 400 mV p-p CIN=0 F IOUT=10 mA
FIGURE 2-15: Power Supply Ripple Rejection vs. Frequency.
FIGURE 2-18: (MCP1791).
Startup from Shutdown
DS22075A-page 10
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
Note: Unless otherwise indicated, COUT = 4.7 uF Ceramic (X7R), CIN = 10.0 F Ceramic (X7R), IOUT = 1 mA, Temperature = +25C, VIN = 6.0V, RPWRGD_PULLUP = 10 k To VOUT, VSHDN = VIN, and device is MCP1790.
FIGURE 2-19:
Dynamic Line Response.
FIGURE 2-22:
5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 20 40
Dynamic Load Response.
Output Voltage (V)
VOUT = 3.3V
VOUT = 3.0V
60
80
100
120
140
Output Current (mA)
FIGURE 2-20:
Dynamic Line Response.
FIGURE 2-23:
7 Output Voltage (V) 6 5 4 3 2 1 0 0 20 40
Short Circuit Response.
VOUT = 5.0V VIN = 6.3V
60
80
100
120
140
Output Current (mA)
FIGURE 2-21:
Dynamic Load Response.
FIGURE 2-24:
Short Circuit Response.
(c) 2008 Microchip Technology Inc.
DS22075A-page 11
MCP1790/MCP1791
Note: Unless otherwise indicated, COUT = 4.7 uF Ceramic (X7R), CIN = 10.0 F Ceramic (X7R), IOUT = 1 mA, Temperature = +25C,
VIN = 6.0V, RPWRGD_PULLUP = 10 k To VOUT, VSHDN = VIN, and device is MCP1790.
90 80 70 60 50 40 30 20 10 0 0 1
Startup Ground Current (A)
IOUT = 1 mA
VOUT = 5.0V VOUT = 3.3V
2
3
4
5
6
7
Input Voltage (V)
FIGURE 2-25:
Startup Ground Current.
DS22075A-page 12
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
3.0 PIN DESCRIPTIONS
MCP1790 PIN FUNCTION TABLE
Pin No. DDPAK-3 1 2,Tab 3 Symbol VIN GND VOUT Unregulated Supply Voltage Ground Terminal Regulated Output Voltage Function The descriptions of the pins are listed in Table 3-1 and Table 3-2.
TABLE 3-1:
Pin No. SOT-223-3 1 2,Tab 3
TABLE 3-2:
Pin No. SOT-223-5 1 2 3 4 5 Tab --
MCP1791 PIN FUNCTION TABLE
Pin No. DDPAK-5 1 2 3 4 5 Tab -- Symbol SHDN VIN GND VOUT PWRGD -- N/C Shutdown Input Unregulated Supply Voltage Ground Terminal Regulated Output Voltage Power Good Open-Drain Output Connected to Ground no connection Function
3.1
Input Voltage Supply (VIN)
3.4
Shutdown (SHDN)
Connect the unregulated or regulated input voltage source to VIN. If the input voltage source is located several inches away from the regulator or the input source is a battery, it is recommended that an input capacitor is used. A typical input capacitance value of 1 F to 10 F should be sufficient for most applications. The type of capacitor used can be ceramic, tantalum or aluminum electrolytic. The low ESR characteristics of the ceramic will yield better noise and PSRR performance at high-frequency.
The SHDN pin is an active-low input signal that turns the regulator output voltage on and off. When the SHDN input is at a logic-high level, the regulator output voltage is enabled. When the SHDN input is pulled to a logic-low level, the regulator output voltage is disabled. When the SHDN input is pulled low, the PWRGD output signal also goes low and the regulator enters a low quiescent current shutdown state where the typical quiescent current is 10 A. The SHDN pin is bonded to VIN in the 3-pin versions of the regulator. See Table 4-1.
3.2
Ground (GND)
3.5
Power Good Output (PWRGD)
Tie GND to the negative side of the output and the negative side of the input capacitor. Only the regulator bias current flows out of this pin; there is no high current. The regulator output regulation is referenced to this pin. Minimize voltage drops between this pin and the negative side of the load.
3.3
Regulated Output Voltage (VOUT)
The PWRGD pin is an open-drain output signal that is used to indicate when the regulator output voltage is within 90% (typically) of its nominal regulation value. The PWRGD threshold has a typical hysteresis value of 2%. The typical PWRGD delay time due to VOUT rising above 90% +3% (maximum hysteresis) is 30 s. The typical PWRGD delay time due to VOUT falling below 90% is 235 s. These delay times are internally fixed.
The VOUT pin is the regulated output voltage of the regulator. A minimum output capacitance of 1.0 F tantalum, 1.0 F electrolytic, or 4.7 F ceramic is required for stability. The MCP1790 is stable with ceramic, tantalum, and electrolytic capacitors. See Section 4.7 "Output Capacitor" for output capacitor selection guidance.
3.6
Exposed Pad (EP)
The DDPAK package has an exposed tab on the package. A heat sink may be mounted to the tab to aid in the removal of heat from the package during operation. The exposed tab or pad of all of the available packages is at the ground potential of the regulator.
(c) 2008 Microchip Technology Inc.
DS22075A-page 13
MCP1790/MCP1791
4.0 DEVICE OVERVIEW
4.4
4.4.1
External Protection
TRANSIENT VOLTAGE PROTECTION (LOAD DUMP)
The MCP1790/MCP1791 are high input voltage regulators capable of providing up to 70 mA of current at output voltages up to 5.0V. The devices have an input voltage operating range from 6.0V to 30V, 48V absolute max. The MCP1790 devices are 3-pin devices consisting of VIN, VOUT, and GND. The MCP1791 devices have 5 or more pins which add Shutdown and Power-Good functions to the MCP1790 device.
The regulator is capable of withstanding a 48V (43.5V 10) load dump transient for a duration of 180 ms and a repetition rate of 30 seconds (ES-XW7T-1A278-AC, Ford Motor Company, Test Pulse G Loaded). While not necessary, good design practice dictates adding an external transient suppressor, between VBB and ground, with a low value resistor in series with the battery supply and the VIN pin, to limit currents and voltages due to electrical transients. Because of the regulator startup current, the resistor value should be less than (VBAT -6V) / 200 mA. For a 12V battery voltage, the resistor value should be less than 30 ohms.
4.1
Startup
In the start phase, the device must see at least 6.0V to initiate operation during power up. In the Power-down mode, the VIN monitor will be turned off.
4.2
Thermal Shutdown
The regulator has a thermal shutdown. If the thermal protection circuit detects an over temperature condition, typically 157C junction temperature, the regulator will shut down. The device will recover from the thermal shutdown when the junction temperature drops to 137C (typical).
4.4.2
REVERSE BATTERY PROTECTION
An external reverse battery blocking diode may be used to provide polarity protection.
4.3
Regulator Output Voltage
The MCP1790/MCP1791 regulators are available in fixed output voltage configurations. The standard output voltages are 3.0V, 3.3V, and 5.0V.
VIN
T1 T2 Soft Start
Monitoring Temperature
Reference Voltage T1 en Error Amplifier T2 + Temp Sensor
Logical Block en VIN
Short Circuit Protection 510k
VOUT
490k Delay
SHDN
Monitoring VIN
Monitoring VOUT
Delay
PWRGD
GND
FIGURE 4-1:
MCP1790/MCP1791 Block Diagram.
DS22075A-page 14
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
4.5 Shutdown (SHDN) 4.6 Low Voltage Shutdown
The MCP1791 has a Shutdown (SHDN) input signal that enables or disables the regulator output voltage. When the SHDN input signal is greater than 2.40V, the regulator output voltage is enabled. Note that the regulator output may still be disabled by the undervoltage lockout incorporated within the VIN circuitry. The value of the SHDN signal to put the regulator into Shutdown mode is 0.8V. The SHDN pin is pulled low by an internal resistor. If the SHDN pin is left floating, the internal pull-down resistor will put the regulator into shutdown mode. When the SHDN input signal is pulled to a logic-low, the PWRGD output signal will also go low and the regulator will enter a low quiescent current state where the typical quiescent current is 10 A. There is a short time delay (approximately 400 ns) when the SHDN input signal transitions from high to low to prevent signal noise from disabling the regulator. The SHDN pin will ignore low-going pulses that are up to 400 ns in pulse width. If the SHDN input is pulled low for more than 400 ns, the regulator will enter Shutdown mode. This small bit of filtering helps to reject any system noise spikes on the SHDN input signal. On the rising edge of the SHDN input, the shutdown circuitry will have a 100 s delay before allowing the regulator output to turn on. This delay helps to reject any false turn-on signals or noise on the SHDN input signal. After the 100 s delay, the regulator will start charging the output capacitor as the regulator output voltage rises from 0V to its final regulated value. The charging current will be limited by the short circuit current value of the device. If the SHDN input signal is pulled low during the 100 s delay period, the timer will be reset and the delay time will start over again on the next rising edge of the SHDN input. The total time from the SHDN input going high (turn-on) to the regulator output being in regulation shall typically be 200 s (100 s + 100 s) for a CLOAD = 1.0 F.
TOR 100 s CLOAD CHARGING TIME 400 ns (typ) 100 s SHDN
The MCP1790/MCP1791 incorporates a Low Voltage Shutdown circuit that turns off the output of the regulator whenever the input voltage, VIN, is below the specified turn off voltage, VOFF. When the input voltage (VB) drops below the differential needed to provide stable regulation, the output voltage (VREG) shall track the input down to approximately +4.00V. The regulator will turn off the output at this point. The output will turn on when VIN rises above the VON value specified in the data sheet. This feature is independent of the Shutdown input signal (SHDN) that is provided for external regulator control. If the SHDN input signal is active (LOW), then the output of the regulator shall be disabled regardless of input voltage.
TABLE 4-1:
VIN < VOFF < VOFF > VON > VON
SHUTDOWN LOGIC
SHDN L H L H VOUT OFF OFF OFF ON
4.7
Output Capacitor
The MCP1790/MCP1791 requires a minimum output capacitance of 1 F tantalum or electrolytic capacitance. The minimum value for ceramic capacitors is 4.7 F. The regulator is stable for all three types of capacitors from 4.7 F to 1000 F (see Figure 4-3). The MCP1790/MCP1791 regulator may be used with a 1 F ceramic output capacitor if a 0.300 resistor is placed in series with the capacitor. The low ESR and corresponding pole of the ceramic capacitor causes the instability below 4.7 F. The Equivalent Series Resistance (ESR) of the output capacitor must be no greater than 3 ohms. The output capacitor should be located as close to the regulator output as is practical. Ceramic materials X7R and X5R have low temperature coefficients and are recommended because of their size, cost, and environmental robustness qualities.
VOUT
CLOAD = 1.0 F
FIGURE 4-2: Diagram.
Shutdown Input Timing
(c) 2008 Microchip Technology Inc.
DS22075A-page 15
MCP1790/MCP1791
4.8 Output Current and Current Limiting
The 5.0V regulator has an overload current limiting of approximately 120 mA. If VREG is lower than 3.5V, IOUT will start to fold back and decrease along with VREG until IOUT is less than 105 mA and VREG is near 0 volts. The 3.3V regulator has an overload current limiting of approximately 130 mA. If VREG is lower than 2.5V, IOUT will start to fold back and decrease along with VREG until IOUT is less than 99 mA and VREG is near 0 volts.
The MCP1790/MCP1791 devices are tested and ensured to supply a minimum of 70 mA of output current. The MCP1790/MCP1791 also incorporate an output current limit foldback. When the regulator is in an overcurrent condition, VOUT will decrease with increasing load. When VOUT falls below 30% (typical) of VR, the output current will start to fold back. The output current will fold back to less than 100 mA (typical) when VOUT is near 0 volts.
ESR Curves 10 Instable 1 ESR [ohm] Stable only
with Tantalum or Electrolytic cap.
Stable with 0.1 Instable
Tantalum, Electrolytic and Ceramic cap.
0.01 Instable 0.001 0.1 1 10 Load Capacitor [uF]
FIGURE 4-3: ESR Curves For Load Capacitor Selection.
100
1000
DS22075A-page 16
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
4.9 Power Good Output (PWRGD)
VPWRGD_TH VOUT TPG 30 s VPWRGD_HYS
The MCP1791 has an open-drain Power Good (PWRGD) output signal capable of sinking a minimum of 5.0 mA of current while maintaining a PWRGD output voltage of 0.4V or less. As the output voltage of the LDO rises, the PWRGD output will be held low until the output voltage has exceeded the power good threshold (VPWRGD_TH) level by an amount equal to the power good hysteresis value ((VPWRGD_HYS), typically 2% of VR. Once this threshold has been exceeded, the power good output signal will be pulled high by an external pull-up resistor, indicating that the output voltage is stable and within regulation limits. If the output voltage of the LDO falls below the power good threshold (VPWRGD_TH) level, the power good output will transition low. The power good circuitry has a 235 s delay when detecting a falling output voltage, which helps to increase noise immunity of the power good output and avoid false triggering of the power good output during fast output transients. See Figure 4-4 for power good timing characteristics. When the LDO is put into Shutdown mode using the SHDN input, the power good output is pulled low within 400 ns typical, indicating that the output voltage will be out of regulation. The timing diagram for the power good output when using the shutdown input is shown in Figure 4-5. The PWRGD output may be pulled up to either VIN or VOUT. When pulled to VOUT, the PWRGD output will sink very little current during shutdown. When PWRGD is pulled up to VIN , the PWRGD output will sink current during shutdown. That is because VOUT is 0 during shutdown while VIN is still active. When the PWRGD output is pulled to VIN , the PWRGD output signal will track VIN at startup until the threshold of the PWRGD circuitry has been reached and the PWRGD circuitry pulls the signal back low. Therefore, when pulling PWRGD to VIN instead of VOUT, the designer must be aware of the PWRGD signal going high while the input voltage is rising at startup. Pulling PWRGD to VOUT removes the startup pulse.
VOH TVDET_PWRGD 235 s
PWRGD VOL
FIGURE 4-4:
Power Good Timing.
CLOAD = 1.0 F
VIN
TOR 100 s
100 s
SHDN
TPG
VOUT
PWRGD
FIGURE 4-5: Shutdown.
Power Good Timing from
(c) 2008 Microchip Technology Inc.
DS22075A-page 17
MCP1790/MCP1791
5.0
5.1
APPLICATION CIRCUITS / ISSUES
Typical Application
EQUATION 5-2:
T J ( MAX ) = P TOTAL x R JA + T AMAX TJ(MAX) PTOTAL RJA TAMAX = = = = Maximum continuous junction temperature. Total device power dissipation. Thermal resistance from junction to ambient. Maximum ambient temperature.
The MCP1790/MCP1791 is most commonly used as a voltage regulator. It's high voltage input capability and thermal protection make it ideal for automotive and 24V industrial applications.
MCP1791
1 VIN 24 VDC 5 1N4002 10 k CIN 1 F Ceramic + + COUT 4.7 F Ceramic 5V@70 mA 2 3 4 5 PWRGD VOUT
The maximum power dissipation capability for a package can be calculated given the junction-toambient thermal resistance and the maximum ambient temperature for the application. The following equation can be used to determine the package maximum internal power dissipation.
EQUATION 5-3:
( T J ( MAX ) - T A ( MAX ) ) P D ( MAX ) = --------------------------------------------------R JA PD(MAX) = Maximum device power dissipation. TJ(MAX) TA(MAX) RJA = = = Maximum continuous junction temperature. Maximum ambient temperature. Thermal resistance from junction to ambient.
FIGURE 5-1: 5.1.1
Typical Application.
APPLICATION INPUT CONDITIONS
Package Type = SOT-223-5
Input Voltage Range = 8V to 24V VIN maximum = 24V VOUT typical = 5.0V IOUT = 70 mA maximum
5.2
5.2.1
Power Calculations
POWER DISSIPATION
EQUATION 5-4:
T J ( RISE ) = P D ( MAX ) x R JA TJ(RISE) = Rise in device junction temperature over the ambient temperature. Maximum device power dissipation. Thermal resistance from junction-to-ambient.
The internal power dissipation of the MCP1790/ MCP1791 is a function of input voltage, output voltage and output current. The power dissipation, as a result of the quiescent current draw, is so low, it is insignificant (70.0 A x VIN). The following equation can be used to calculate the internal power dissipation of the LDO.
PTOTAL RJA
= =
EQUATION 5-1:
P LDO = ( V IN ( MAX ) ) - V OUT ( MIN ) ) x I OUT ( MAX ) ) PLDO VIN(MAX) VOUT(MIN) = = = LDO Pass device internal power dissipation Maximum input voltage LDO minimum output voltage TJ TJ(RISE) = =
EQUATION 5-5:
T J = T J ( RISE ) + T A Junction Temperature. Rise in device junction temperature over the ambient temperature. Ambient temperature.
The maximum continuous operating junction temperature specified for the MCP1790/MCP1791 is +125C. To estimate the internal junction temperature of the MCP1790/MCP1791, the total internal power dissipation is multiplied by the thermal resistance from junction to ambient (RJA). The thermal resistance from junction to ambient for the SOT-223-5 package is estimated at 62C/W.
TA
=
DS22075A-page 18
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
5.3 Power Dissipation Example
5.3.1.2 Junction Temperature Estimate
Internal power dissipation, junction temperature rise, junction temperature and maximum power dissipation are calculated in the following example. The power dissipation, as a result of ground current, is small enough to be neglected. To estimate the internal junction temperature, the calculated temperature rise is added to the ambient or offset temperature. For this example, the worst-case junction temperature is estimated below. TJ = TJRISE + TA(MAX) TJ = 99.2C
5.3.1
Package:
POWER DISSIPATION EXAMPLE 5.3.1.3
Package Type = SOT-223-5 Input Voltage: VIN = 8V to 24V LDO Output Voltages and Currents: VOUT = 5.0V IOUT = 50 mA Maximum Ambient Temperature: TA(MAX) = +40C Internal Power Dissipation: Internal Power dissipation is the product of the LDO output current times the voltage across the LDO (VIN to VOUT). PLDO(MAX) = (VIN(MAX) - VOUT(MIN)) x IOUT(MAX) PLDO = (24V - (0.98 x 5.0V)) x 50 mA PLDO = 955 milli-Watts
Maximum Package Power Dissipation at +40C Ambient Temperature
SOT-223-5 (62C/Watt = RJA) PD(MAX) = (125C - 40C) / 62C/W PD(MAX) = 1.371 Watts DDPAK-5 (32C/Watt = RJA) PD(MAX) = (125C - 40C) / 32C/W PD(MAX) = 2.656 Watts
5.4
Pulsed Load Applications
5.3.1.1
Device Junction Temperature Rise
The internal junction temperature rise is a function of internal power dissipation and the thermal resistance from junction to ambient for the application. The thermal resistance from junction to ambient (RJA) is derived from an EIA/JEDEC standard for measuring thermal resistance for small surface mount packages. The EIA/JEDEC specification is JESD51-7, "High Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages". The standard describes the test method and board specifications for measuring the thermal resistance from junction to ambient. The actual thermal resistance for a particular application can vary depending on many factors, such as copper area and thickness. Refer to AN792, "A Method to Determine How Much Power a SOT23 Can Dissipate in an Application", (DS00792), for more information regarding this subject. TJ(RISE) = PTOTAL x RqJA TJRISE = 955 milli-Watts x 62C/Watt TJRISE = 59.2C
For some applications, there are pulsed load current events that may exceed the specified 70 mA maximum specification of the MCP1790/MCP1791. The internal current foldback feature of the MCP1790/MCP1791 will prevent high peak load demands from causing non-recoverable damage. The Current Foldback feature of the device will limit the output voltage and output current during pulsed applications. As the current rises above the foldback current threshold, the output voltage will decrease.
(c) 2008 Microchip Technology Inc.
DS22075A-page 19
MCP1790/MCP1791
6.0
6.1
PACKAGING INFORMATION
Package Marking Information
3-Lead DDPAK (MCP1790) Example:
XXXXXXXXX XXXXXXXXX YYWWNNN 1 2 3
MCP1790 e3 50EEB^^ 0730256 1 2 3
3-Lead SOT-223 (MCP1790)
Example:
XXXXXXX XXXYYWW NNN
179050 EDB0730 256
Legend: XX...X Y YY WW NNN
e3
* Note:
Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week `01') Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package.
In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information.
DS22075A-page 20
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
6.1 Package Marking Information (Continued)
5-Lead DDPAK (Fixed) (MCP1791) Example:
XXXXXXXXX XXXXXXXXX YYWWNNN
MCP1791 e 50EET^^3 0730256
12345
12345
5-Lead SOT-223 (MCP1791)
Example:
XXXXXXX XXXYYWW NNN
179150 EDC0730 256
Legend: XX...X Y YY WW NNN
e3
* Note:
Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week `01') Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package.
In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information.
(c) 2008 Microchip Technology Inc.
DS22075A-page 21
MCP1790/MCP1791
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MCP1790/MCP1791
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DS22075A-page 23
MCP1790/MCP1791
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(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
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DS22075A-page 25
MCP1790/MCP1791
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(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
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(c) 2008 Microchip Technology Inc.
DS22075A-page 27
MCP1790/MCP1791
NOTES:
DS22075A-page 28
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
APPENDIX A: REVISION HISTORY
Revision A (March 2008)
* Original Release of this Document.
(c) 2008 Microchip Technology Inc.
DS22075A-page 29
MCP1790/MCP1791
NOTES:
DS22075A-page 30
(c) 2008 Microchip Technology Inc.
MCP1790/MCP1791
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. Device XX X X X/ XX Examples:
a) b) c) d) e) f)
Output Voltage *: 30 33 50 = 3.0V "Standard" = 3.3V "Standard" = 5.0V "Standard"
Output Feature Tolerance Temp. Package Voltage Code
Device:
MCP1790: 70 mA High Voltage Regulator MCP1790T: 70 mA High Voltage Regulator Tape and Reel MCP1791: 70 mA High Voltage Regulator MCP1791T: 70 mA High Voltage Regulator Tape and Reel
MCP1790-3002E/EB:3.0V LDO Regulator, 3LD DDPAK MCP1790-3302E/EB:3.3V LDO Regulator, 3LD DDPAK MCP1790-5002E/EB:5.0V LDO Regulator, 3LD DDPAK MCP1790-3002E/DB:3.0V LDO Regulator, 3LD SOT-223 MCP1790-3302E/DB:3.3V LDO Regulator, 3LD SOT-223 MCP1790-5002E/DB:5.0V LDO Regulator, 3LD SOT-223
*Contact factory for other output voltage options Extra Feature Code: 0 = Fixed
a) b)
Tolerance:
2
= 2.5% (Standard)
c) d) e) f)
Temperature:
E
= -40C to +125C
Package Type:
EB ET DB DC
= = = =
Plastic, DDPAK, 3-lead Plastic, DDPAK, 5-lead Plastic Transistor Outline, SOT-223, 3-lead Plastic Transistor Outline, SOT-223, 5-lead
MCP1791-3002E/ET: 3.0V LDO Regulator 5LD DDPAK MCP1791-3302E/ET 3.3V LDO Regulator 5LD DDPAK MCP1791-5002E/ET: 5.0V LDO Regulator 5LD DDPAK MCP1791-3002E/DC 3.0V LDO Regulator 5LD SOT-223 MCP1791-3302E/DC 3.3V LDO Regulator 5LD SOT-223 MCP1791-5002E/DC 5.0V LDO Regulator 5LD SOT-223
(c) 2008 Microchip Technology Inc.
DS22075A-page 31
MCP1790/MCP1791
NOTES:
DS22075A-page 32
(c) 2008 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices: * * Microchip products meet the specification contained in their particular Microchip Data Sheet. Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. Microchip is willing to work with the customer who is concerned about the integrity of their code. Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable."
*
* *
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.
Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, rfPIC and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM, PICDEM.net, PICtail, PIC32 logo, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2008, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified.
(c) 2008 Microchip Technology Inc.
DS22075A-page 33
WORLDWIDE SALES AND SERVICE
AMERICAS
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ASIA/PACIFIC
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EUROPE
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01/02/08
DS22075A-page 34
(c) 2008 Microchip Technology Inc.

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