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Datasheet
AS1340
5 0 V, M i c r o p o w e r, D C - D C B o o s t C o n v e r t e r
1 General Description
The AS1340 boost converter contains a 1.4A internal switch in a tiny TDFN-8 3x3mm package. The device operates from a 2.7 to 5.5V supply, and can boost voltages up to 50V output. The output voltage can easily be adjusted by an external resistor divider. The AS1340 uses a unique control scheme providing the highest efficiency over a wide range of load conditions. An internal 1.4A MOSFET reduces external component count, and a fixed high switching frequency (1MHz) allows for tiny surface-mount components. The AS1340 also features power-OK circuitry which monitors the output voltage. Additionally the AS1340 features a low quiescent supply current and a shutdown mode to save power. During shutdown an output disconnect switch separates the input from the output. The AS1340 is ideal for LCD or OLED panels with low current requirements and can also be used in a wide range of other applications. The device is available in a low-profile TDFN-8 3x3mm package.
2 Key Features
! ! ! !
2.7V to 50V Adjustable Output Voltage 2.7V to 50V Input Voltage Range 2.7V to 5.5V Supply Voltage Range High Output Currents: - 100mA @ 12V from 3.3V VIN - 50mA @ 24V from 3.3V VIN - 30mA @ 36V from 3.3V VIN Efficiency: Up to 93% Switching Frequency: 1MHz Output Disconnect Power-OK Output Operating Supply Current: 30A Shutdown Current: 0.1A TDFN-8 3x3mm Package
! ! ! ! ! ! !
3 Applications
The device is ideal for OLED display power supply, LED power supply, LCD bias generators, mobile/cordless phones, palmtop computers, PDAs and organizers, handy terminals or any other portable, battery-powered device. Figure 1. AS1340 - Typical Application Diagram
L1 4.7H VIN = 2.7V to 5.5V VOUT = > VIN to 50V 5 LX R1 8 FB R2 On Off 1 EN 7, 9 GND VIN = 2.7V to 5.5V VCC COUT VCC 3 L1 6 VOUT LX
3 VIN = 2.7V to 5.5V CIN SWVIN 2 VCC 4 POK
6 SWOUT
AS1340
VIN = 2.7V to ~VOUT 3
L1 6 LX
VOUT
If not needed the output disconnect switch can be left unconnected which will also increase the efficiency. Additionally the supply of the chip can be split to allow higher supply voltages for the coil. In this case the output disconnect switch must not be used.
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AS1340
Datasheet - P i n o u t
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
EN 1 VCC 2
8 FB 7 GND
AS1340
SWVIN 3 POK 4 GND 9 6 SWOUT 5 LX
Pin Descriptions
Table 1. Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 9 Pin Name EN VCC SWVIN POK LX SWOUT GND FB GND Description Active-High Enable Input. A logic low on this pin shuts down the device and reduces the supply current to 0.1A. Note: Connect to VCC for normal operation. +2.7V to +5.5V Supply Voltage. Bypass this pin to GND with a 1F capacitor. Shutdown Disconnect Switch In Power-OK. 0 = VOUT < 90% of VOUTNOM. 1 = VOUT > 90% of VOUTNOM. Inductor. The drain of the internal N-channel MOSFET. Note: This pin is high impedance in shutdown. Shutdown Disconnect Switch Out. Disconnects the input from the output during shutdown. Ground. This pin and pin 9 must be connected to GND to ensure normal operation. Feedback Pin. Feedback input to the gm error amplifier. Connect a resistor divider tap to this pin. The output voltage can be adjusted from VIN to 50V by: VOUT = 1.25V[1 + (R1/R2)] Ground. This pin and pin 7 must be connected to GND to ensure normal operation.
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AS1340
Datasheet - A b s o l u t e M a x i m u m R a t i n g s
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings Parameter VCC, FB, EN to GND SWVIN, SWOUT to GND LX to GND Thermal Resistance JA ESD Latch-Up Operating Temperature Range Storage Temperature Range Junction Temperature -100 -40 -65 36.7 1.5 +100 +85 +150 125 Min Max 7 7 55 C/W kV mA C C C The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020D "Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices". The lead finish for Pb-free leaded packages is matte tin (100% Sn). on PCB HBM MIL-Std. 883E 3015.7 methods JEDEC 78 V Units Comments
Package Body Temperature
+260
C
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AS1340
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
VCC = EN = 2.7V, TAMB = -40 to +85C (unless otherwise specified). Typ values are at TAMB = +25C. Table 3. Electrical Characteristics Symbol VCC VIN VOUT ICC Parameter Supply Voltage Inductor Input Voltage Range Output Voltage Range Quiescent Supply Current Enable Supply Current VCC Line Regulation VLNR VIN Line Regulation VLDR VFB IFB Load Regulation Efficiency Feedback Set Point Feedback Input Bias Current VFB = 1.3V VFB = 1.3V, VIN = 5V EN = GND VOUT = 18V, ILOAD = 1mA, VIN = 5.5V, VCC = 2.7 to 5.5V VOUT = 18V, ILOAD = 1mA, VCC = 5V, VIN = 2.7 to 5.5V VOUT = 18V, VCC = VIN = 5V, ILOAD = 0 to 20mA L1 = 10H, VIN = 5.5V, VOUT = 20V, ILOAD = 100mA 1.225 Condition Min 2.7 2.7 2.7 30 0.1 0.3 0.25 0.02 88 1.25 5 1.275 100 Typ Max 5.5 50 50 50 1 Unit V V V A A %/V %/V %/mA % V nA
DC-DC Switches VOUT max ILX(MAX) RLX RP_ON ILX_LEAK IP_LEAK Control Inputs VIH EN Input Threshold VIL IEN POK Output VOL POK Output Low Voltage POK Output High Leakage Current POK Threshold Oscillator fCLK Oscillator Frequency Maximum Duty Cycle 0.85 85 1 90 1.15 95 MHz % POK sinking 1mA POK = 5.5V Rising edge, referenced to VOUT(NOM) 87 0.01 100 90 0.2 500 93 V nA % EN Input Bias Current VCC = 5.5V, VEN = 0 to 5.5V -1 2.7V VCC 5.5V 0.8 x VCC 0.2 x VCC +1 LX Switch Current Limit LX On-Resistance Switch On-Resistance LX Leakage Current Switch Leakage Current VIN = 5.5V, ILOAD = 0mA VIN = 5.5V, ILOAD > 20mA VCC = 5.5V, ILX = 100mA VIN = 5.5V, PMOS VLX = 50V VIN = 5.5V, PMOS 50 1.41 0.6 0.2 2 0.5 V A
A
V
A
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AS1340
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
7 Typical Operating Characteristics
Parts used for measurments: 4.7H (LPS4018-472ML) Inductor, 10F (GRM32DR71C106KA01) CIN and 1F (GRM31MR71H105KA88) COUT Figure 3. Efficiency vs. Output Current; VOUT = 36V
100 90 80
Figure 4. Efficiency vs. Output Current; VOUT = 24V
100 90 80
Efficiency (%)
60 50 40 30 20 10 0 0.1 1 10 100
Vi n = 2.7V Vi n = 3.3V Vi n = 5.5V
Efficiency (%)
70
70 60 50 40 30 20 10 0 0.1 1 10 100
Vi n = 2.7V Vi n = 3.3V Vi n = 5.5V
Output Current (mA) Figure 5. Efficiency vs. Output Current; VOUT = 12V
100 90 80
Output Current (mA) Figure 6. Efficiency vs. Output Current; VOUT = 6V
100 90 80
Efficiency (%)
60 50 40 30 20 10 0 0.1 1 10 100
Vi n = 2.7V Vi n = 3.3V Vi n = 5.5V
Efficiency (%)
70
70 60 50 40 30 20 10 0 0.1 1 10 100
Vi n = 2.7V Vi n = 3.3V Vi n = 5.5V
Output Current (mA) Figure 7. Efficiency vs. VIN; VOUT=18V, Split Supplies
100 90
Output Current (mA) Figure 8. Efficiency vs. VIN; IOUT = 10mA
100 90
Efficiency (%)
80 70 60 50 40 2 4 6 8 10 12
Iout = 1mA Iout = 10mA Iout = 50mA Iout = 5mA Iout = 20mA
Efficiency (%)
80 70 60 50 40 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Vout = 6V Vout = 18V Vout = 30V Vout = 48V Vout = 12V Vout = 24V Vout = 36V
Input Voltage (V) www.austriamicrosystems.com Revision 1.10
Input Voltage (V) 5 - 16
AS1340
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
Figure 9. Output Voltage vs. Temperature; VOUT = 18V
18.5
Iout=1mA
Figure 10. Output Voltage vs. Load Current; VOUT = 18V, VIN = 3.3V
18.5
Iout=5mA Iout=10mA
18.4
18.4 18.3
Output Voltage (V) .
18.3 18.2 18.1 18 17.9 17.8 17.7 17.6 17.5 -45 -30 -15 0 15 30 45
Output Voltage (V) .
90
Iout=20mA Iout=50mA
18.2 18.1 18 17.9 17.8 17.7 17.6 17.5
60
75
Temperature (C)
0
10
20
30
40
Output Current (mA) Figure 12. Output Voltage vs. Input Voltage; VOUT = 18V
18.5 18.4 18.3
Figure 11. Output Voltage vs. Input Voltage; VOUT = 18V, Split Supplies
18.5 18.4 18.3
Output Voltage (V)
18.2 18.1 18 17.9 17.8 17.7 17.6 17.5 2 3 4 5 6 7 8 9 10 11 12
Iout = 1mA Iout = 5mA Iout = 10mA Iout = 20mA
Output Voltage (V)
18.2 18.1 18 17.9 17.8 17.7 17.6 17.5 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Iout = 1mA Iout = 5mA Iout = 10mA Iout = 20mA
Input Voltage (V) Figure 13. Output Current vs. VIN; Split Supplies
500
Vout = 12V Vout = 18V Vout = 30V
Input Voltage (V) Figure 14. Output Current vs. VIN
500
Vout = 12V Vout = 18V Vout = 30V
450
Vout = 24V Vout = 36V
450
Vout = 24V Vout = 36V
Output Current (mA)
350 300 250 200 150 100 50 0 2 3 4 5 6 7 8 9 10 11 12
Output Current (mA)
400
400 350 300 250 200 150 100 50 0 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
Input Voltage (V)
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AS1340
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
Figure 15. Startup Voltage vs. Output Current; VIN = 2.7 to 5.5V
5.5 5 4.5
Figure 16. Input Current vs. Input Voltage; IOUT = 0mA, switching
1 0.9 0.8
Vout = 6V Vout = 12V Vout = 18V Vout = 24V
Start-Up Voltage (V)
4 3.5 3 2.5 2 1.5 1 0.5 0 0 5 10 15 20 25 30 35 40 45 50
Vout = 6V Vout = 18V Vout = 30V Vout = 12V Vout = 24V Vout = 36V
Input Current (mA)
0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 2.7 3.1 3.5 3.9 4.3 4.7
Vout = 30V
5.1
5.5
Output Current (mA)
Figure 17. Input Current vs. Output Current; VOUT = 12V
600
Vi n = 2.4V
Input Voltage (V)
Figure 18. Input Current vs. Output Current; VOUT = 18V
600
Vi n = 2.4V
500
Vi n = 2.7V Vi n = 3.3V
500
Vi n = 2.7V Vi n = 3.3V Vi n = 5.5V
Input Current (mA)
400 300 200 100 0 0 10 20 30 40 50 60 70
Input Current (mA)
Vi n = 5.5V
400 300 200 100 0 0 10 20 30 40 50 60 70
Output Current (mA)
Figure 19. Startup Waveform
Output Current (mA)
Figure 20. Startup Waveform - POK
5V/Div
500mA/DIV
VOUT
10V/Div
POK
200s/Div
50s/Div
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2V/Div
VOUT
5V/DIV
LX
5V/Div
EN
EN
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AS1340
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
Figure 21. Transient Line Regulation; VOUT = 18V, ILOAD = 1mA
Figure 22. Transient Line Regulation; VOUT = 18V, ILOAD = 20mA
200mV/Div
2V/DIV
500s/Div
500s/Div
Figure 23. Output Voltage Ripple; VOUT = 18V, IOUT = 1mA
Figure 24. Output Voltage Ripple; VOUT = 18V, IOUT = 20mA
VIN = 5.5V
VIN = 5.5V
200mV/Div
VOUT
VOUT
VIN = 3.3V
VIN = 3.3V
VIN = 2.7V
VIN = 2.7V
1s/Div
2ms/Div
Figure 25. Load Transient Response; VIN = 5.5V, VOUT = 18V
Figure 26. Fixed Frequency vs. Powersave Operation; VIN = 2.7V, VOUT = 18V
200mV/Div
VOUT(AC)
1mA 20mA
VOUT(AC)
2ms/Div
2ms/Div
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1mA 20mA
IOUT
IOUT
200mV/Div
200mV/Div
2V/DIV
VIN
VIN
200mV/Div
VOUT(AC)
VOUT(AC)
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AS1340
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS1340 features a current limiting circuitry, a fixed-frequency PWM architecture, power-OK circuitry, thermal protection, and an automatic powersave mode in a tiny package, and maintains high efficiency at light loads.
Figure 27. AS1340 - Block Diagram with Shutdown Disconnect Switch
L1 4.7H 3 VIN = 2.7V to 5.5V 2 VCC CIN 1F PWM Control Sync Drive Control 1 MHz Spread Spectrum Ramp Generator + PWM - Comp - 1 EN Shutdown Control Slope Compensator SWVIN 6 SWOUT 4 POK 5 LX - VOUT Good + 1.13V VIN to 50V
0.9 Current Sense CFF*
R1
AS1340
VC RC - gm Error Amp + 8 FB
COUT
Shutdown
Powersave Operation Control
CP2 CC
1.25V Ref R2
Powersave
7,9
GND
* Optional
Automatic powersave mode regulates the output and also reduces average current flow into the device, resulting in high efficiency at light loads. When the output increases sufficiently, the powersave comparator output remains high, resulting in continuous operation. For each oscillator cycle, the power switch is enabled. A voltage proportional to switch current is added to a stabilizing ramp and the resulting sum is delivered to the positive terminal of the PWM comparator. The error amplifier compares the voltage at FB with the internal 1.25V reference and generates an error signal (VC). When VC is below the powersave mode threshold voltage the automatic powersave-mode is activated and the hysteretic comparator disables the power circuitry, with only the low-power circuitry still active (total current consumption is minimized). When a load is applied, VFB decreases; VC increases and enables the power circuitry and the device starts switching. In light loads, the output voltage (and the voltage at FB) will increase until the powersave comparator disables the power circuitry, causing the output voltage to decrease again. This cycle is repeated resulting in low-frequency ripple at the output. The POK output indicates whether the output voltage is within 90% of the nominal output voltage level or not. When EN is low, the circuit is not active and POK gives a high signal when connected to VCC by a pull-up resistor. When EN goes high, POK goes low after appr. 50s and will go high when the output reaches 90% of the nominal output voltage (see Figure 20 on page 7). When input and output voltage are almost the same, it may happen that the POK Signal does not go low because VOUT reaches 90% before the delay has expired. The open-drain POK output sinks current, when EN is high and the output voltage is below 90% of the nominal output voltage. Thermal protection circuitry shuts down the device when its temperature reaches 145C.
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AS1340
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
Power Supply Concept
The AS1340 has an operating voltage range from 2.7 to 5.5V. If the inductor is supplied from the same source the battery disconnect switch can be used as well (see Figure 1 on page 1). In case that a input voltage source is higher than 5.5V, the inductor can be supplied separately up to 50V (see Figure 28), but then the battery disconnect switch cannot be used, because its operating voltage range is limited to 5.5V.
Shutdown
A logic low on pin EN shuts down the AS1340 and a logic high on EN powers on the device. In shutdown mode the supply current drops to below 1A to maximize battery life. In case that the battery disconnect switch is used, the battery is disconnected from the output during shutdown.
Note: Pin EN should not be left floating. If the shutdown feature is not used, connect EN to VIN.
Battery Disconnect
The AS1340 has an integrated switch that can be used to disconnect the battery during shutdown. The operation voltage of this switch is limited to 5.5V. When EN is high, the switch is closed and supplies the inductor. Due to the RON resistance the efficiency is slightly lower if the battery disconnect switch is used.
PLOSS = IIN x RON (EQ 1)
Setting Output Voltage
Output voltage can be adjusted by connecting a voltage divider between pins LX and FB (see Figure 28).
Figure 28. Typical Application (SWVIN and SWOUT not in use.)
Supply 2.7V to VOUT L1 4.7H 3 2 C1 0.1F VCC SWVIN 6 SWOUT 5 LX R1 2.2M 4 POK On Off 1 EN 7,9 GND D1 VOUT = 18V COUT 1F
CIN 10F
VIN = 2.7V to 5.5V
AS1340
8 FB R2 165k
The output voltage can be adjusted by selecting different values for R1 and R2. For R2, select a value between 10k and 200k. Calculate R1 by:
VOUT R1 = R2 -------------- - 1 VFB Where: (EQ 2)
VOUT = VIN to 50V, VFB = 1.25V The input bias current of FB has a maximum value of 100nA which allows for large-value resistors. For less than 1% error, the current through R2 should be 100 times the feedback input bias current (IFB).
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AS1340
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
LED Power Supply Application
The AS1340 can also be used for driving LEDs. Just simply connect the LEDs between the pins LX and FB. (see Figure 29).
Figure 29. LED Supply Application
L1 4.7H 3 VIN = 2.7V to 5.5V 2 C1 0.1F VCC SWVIN 6 SWOUT 5 LX D1 COUT 1F
4 POK On Off 1 EN
AS1340
8 FB R2 100 ILED
7,9 GND
The output voltage is adjusted automatically to the required voltage of the LEDs. This voltage depends on the forward voltage (VF) of the used LEDs and the Feeback Voltage VFB. Calculate VOUT by:
VOUT = VF ( ILED ) x n + VFB (EQ 3)
Note: The brightness of the LEDs can directly be adjusted by setting the current ILED via the corresponding R2.
Calculate R2 by: VFB ILED = --------R2
Where: (EQ 4)
VFB = 1.25V n .... number of LED's
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AS1340
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
Inductor Selection
For the external inductor, a 6.8H inductor is recommended. Minimum inductor size is dependant on the desired efficiency and output current. Inductors with low core losses and small DCR at 1MHz are recommended.
Table 4. Recommended Inductors Part Number L DCR Current Rating Dimensions (L/W/T) Manufacturer Coilcraft www.coilcraft.com
LPS4018-472ML_ ME3220-472ML_ MOS6020-472ML_ MSS6122-472ML_ LPS4018-682ML_ ME3220-682ML_ MOS6020-682ML_ MSS6122-682ML_
4.7H 4.7H 4.7H 4.7H 6.8H 6.8H 6.8H 6.8H
0.125 0.190 0.050 0.065 0.150 0.270 0.078 0.100
1.9A 1.5A 1.94A 1.82A 1.3A 1.2A 1.72A 1.50A
4.4x4.4x1.7mm 3.2x2.8x2mm 6.8x6x2.4mm 6.1x6.1x6mm 4.4x4.4x1.7mm 3.2x2.8x2mm 6.8x6x2.4mm 6.1x6.1x6mm
Figure 30. Efficiency Comparison of Different Inductors, VIN = 3.3V, VOUT = 18V;
100 90 80 100 90 80
Efficiency (%) .
60 50 40 30 20 10 0 1 10 100
LPS4018-472 LPS4018-682 ME3220-472 ME3220-682
Efficiency (%) .
70
70 60 50 40 30 20 10 0 1 10 100
MOS6020-472 MOS6020-682 MSS6122-472 MSS6122-682
Output Current (mA)
Figure 31. Efficiency Comparison of Different Inductors, VIN = 5.5V, VOUT = 18V;
100 90 80 100 90 80
Output Current (mA)
Efficiency (%) .
60 50 40 30 20 10 0 1 10 100
LPS4018-472 LPS4018-682 ME3220-472 ME3220-682
Efficiency (%) .
70
70 60 50 40 30 20 10 0 1 10 100
MOS6020-472 MOS6020-682 MSS6122-472 MSS6122-472
Output Current (mA)
Output Current (mA)
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AS1340
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
Capacitor Selection
A 4.7F capacitor is recommended for CIN as well as a 2F for COUT. Small-sized ceramic capacitors are recommended. X5R and X7R ceramic capacitors are recommend as they retain capacitance over wide ranges of voltages and temperatures.
Output Capacitor Selection
Low ESR capacitors should be used to minimize VOUT ripple. Multi-layer ceramic capacitors are recommended since they have extremely low ESR and are available in small footprints. A 2.2 to 10F output capacitor is sufficient for most applications. Larger values up to 22F may be used to obtain extremely low output voltage ripple and improve transient response. X5R and X7R dielectric materials are recommended due to their ability to maintain capacitance over wide voltage and temperature ranges.
Table 5. Recommended Output Capacitor Part Number C TC Code Rated Voltage Dimensions (L/W/T) Manufacturer Murata www.murata.com
GRM31MR71H105KA88 GRM32ER71H475KA88 C1206C105K5RAC C1206C225K5RAC 1206C105KAT2A
1F 4.7F 1F 2.2F 1F
X7R X7R X7R X7R X7R
50V 50V 50V 50V 50V
C1206 C1210 C1206 C1210 C1206
Kemet www.kemet.com AVX www.avx.com
Input Capacitor Selection
Low ESR input capacitors reduce input switching noise and reduce the peak current drawn from the battery. Ceramic capacitors are recommended for input decoupling and should be located as close to the device as is practical. A 4.7F input capacitor is sufficient for most applications. Larger values may be used without limitations.
Table 6. Recommended Input Capacitor Part Number C TC Code Rated Voltage Dimensions (L/W/T) Manufacturer Murata www.murata.com
GRM21BR71C105KA01 GRM21BR61C225KA88 GRM32DR71C106KA01
1F 2.2F 10F
X7R X7R X7R
16V 16V 16V
C0805 C0805 C1210
Diode Selection
A Schottky diode must be used to carry the output current for the time it takes the PMOS synchronous rectifier to switch on.
Note: Do not use ordinary rectifier diodes, since the slow recovery times will compromise efficiency. Table 7. Recommended Diodes Part Number Reverse Voltage Forward Current Package Manufacturer Philips www.nxp.com MCC www.mccsemi.com
PMEG4010BEA MBR0540 MBR0560
40V 40V 60V
1A 500mA 500mA
SOD123 SOD123 SOD123
Thermal Protection
To protect the device from short circuit or excessive power dissipation of the auxiliary NPNs, the integrated thermal protection switches off the device when the junction temperature (TJ) reaches 145C (typ). When TJ decreases to approximately 125C, the device will resume normal operation. If the thermal overload condition is not corrected, the device will switch on and off while maintaining TJ within the range between 125 and 145C.
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AS1340
Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
10 Package Drawings and Markings
The devices are available in a TDFN-8 3x3mm package.
Figure 32. TDFN-8 3x3mm Package
D D2 SEE DETAIL B B A L E2/2
aaa C 2x PIN 1 INDEX AREA (D/2 xE/2)
D2/2
E2 K N N-1 e (ND-1) X e
BTM VIEW
E
PIN 1 INDEX AREA (D/2 xE/2)
aaa C
2x TOP VIEW
b ddd bbb C CAB
e DETAIL B e/2
Terminal Tip
ccc C
A3
C
SEATING PLANE
0.08 C
A
Datum A or B EVEN TERMINAL SIDE
Symbol A A1 A3 L1 L2 aaa bbb ccc ddd eee ggg Notes:
Min 0.70 0.00
Typ 0.75 0.02 0.20 REF
Max 0.80 0.05
0.03 0.15 0.10 0.10 0.05 0.08 0.10
0.15 0.13
Notes 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2
Symbol D BSC E BSC D2 E2 L K b e N ND
Min
Typ 3.00 3.00
A1
SIDE VIEW
Max
1.60 1.35 0.30 0 0.20 0.18
0.40
2.50 1.75 0.50 14 0.30
0.25 0.65 8 4
Notes 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2, 5
1, 2 1, 2, 5
1. Figure 32 is shown for illustration only. 2. All dimensions are in millimeters; angles in degrees. 3. Dimensioning and tolerancing conform to ASME Y14.5 M-1994. 4. N is the total number of terminals. 5. The terminal #1 identifier and terminal numbering convention shall conform to JEDEC 95-1, SPP-012. Details of terminal #1 identifier are optional, but must be located within the zone indicated. The terminal #1 identifier may be either a mold or marked feature. 6. Dimension b applies to metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 7. ND refers to the maximum number of terminals on side D. 8. Unilateral coplanarity zone applies to the exposed heat sink slug as well as the terminals
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AS1340
Datasheet - O r d e r i n g I n f o r m a t i o n
11 Ordering Information
The device is available as the standard products shown in Table 8.
Table 8. Ordering Information Ordering Code Marking Description Delivery Form Package
AS1340A-BTDT-10
ASM3
50V, Micropower, DC-DC Boost Converter, Automatic Power Save, 1MHz
Tape and Reel
TDFN-8 3x3mm
Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect
For further information and requests, please contact us mailto:sales@austriamicrosystems.com or find your local distributor at http://www.austriamicrosystems.com/distributor
www.austriamicrosystems.com
Revision 1.10
15 - 16
AS1340
Datasheet
Copyrights
Copyright (c) 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered (R). All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.
Contact Information
Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact
www.austriamicrosystems.com
Revision 1.10
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