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GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Description
GM34063 series have all the functions required for DC-to-DC converters: an internal Temperaturecompensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver, and high current output switch. GM34063 series are designed for step-down, step-up and voltage-inverting applications by using a minimum number of external components. For GM34063E can operate for a temperature range from -40C to 125C while GM34063F can operate from -25C to 85C.
Features
3.0V to 40V Input Adjustable Output Voltage Output Switch Current to 1.5A Low Standby Current Operating Frequency to 100kHz Precision 1 % Reference available
Application
CD-ROM Motherboards SMPS Power Supply Battery Chargers DSL Modem
Schematic Diagram
SQ 6 VCC IPK Oscillator CT IPK Sense Comparator + 5 Comparator Inverting Input 7 R
Q2 Q1 100 2 Switch Emitter 3 Timing Capacitor
1.25V VREF 4 GND
GM34063V2.00
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GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Pin Configurations
Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Switch Collector Switch Emitter Timing Capacitor Gnd Comparator Inverting Input VCC IPK Sense Driver Collector
GM34063V2.00
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GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Marking Information, GM34063 - Pb Free Product
SO8 DIP8
GM34063 AYWW
GM34063 AYWW
A: Assembly / Test site code Y: Year WW: Week
Marking Information, GM34063E - Green Product
SO8 DIP8
GM34063EG AYWW
GM34063EG AYWW
E: Operating Temperature Range: -40C to 125C G: Green Product A: Assembly / Test site code Y: Year
Marking Information, GM34063F - Green Product
SO8 DIP8
GM34063FG AYWW
GM34063FG AYWW
F: Operating Temperature Range: -25C to 85C G: Green Product A: Assembly / Test site code Y: Year
GM34063V2.00
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GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Ordering Information
GM34063 - Pb Free Product
Ordering Number GM34063D8T GM34063S8T GM34063S8R Package DIP-8 SOP-8 SOP-8 Shipping 60 Units / Tube 100 Units / Tube 2,500 Units / Tape & Reel
GM34063E - Green Product
Ordering Number GM34063ED8TG GM34063ES8TG GM34063ES8RG Package DIP-8 SOP-8 SOP-8 Shipping 60 Units / Tube 100 Units / Tube 2,500 Units / Tape & Reel
GM34063F - Green Product
Ordering Number GM34063FD8TG GM34063FS8TG GM34063FS8RG Package DIP-8 SOP-8 SOP-8 Shipping 60 Units / Tube 100 Units / Tube 2,500 Units / Tape & Reel
GM34063V2.00
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GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Absolute Maximum Ratings
Parameter Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage (PIN1 = 40V) Switch Collector Emitter Voltage Driver Collector Voltage Driver Collect Current (Note 1) Switch Current Power dissipation DIP 8 SO 8 GM34063 Operating Temperature Range GM34063E GM34063F Storage Temperature Lead Temperature (soldering 10 sec.)
Note 1. Maximum package power dissipation limits must be observed
Symbol VCC VIR VC()switch VE(switch) VCE(switch) VC(driver) IC(driver) ISW
Vaule 40 -0.3 to +40 40 40 40 40 100 1.5 780 510 0 to 70 -40 to 125 -25 to 85 - 65 to 150 260
Unit Vdc Vdc Vdc Vdc Vdc Vdc mA A mW
C
C C
GM34063V2.00
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GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Electrical Characteristics (VCC = 5.0V , TA = 25C unless otherwise specified)
Parameter OSCILLATOR
Frequency Charge Current Discharge Current Discharge to Charge Current Ratio Current Limit Sense Voltage fOSC Ichg Idischg Idischg/Ichg Vipk(sense) VPIN5 = 0V, CT = 1.0nF VCC = 5.0V to 40V VCC = 5.0V to 40V Pin 7 to VCC Ichg = Idischg 24 24 140 5.2 250 33 35 220 6.5 300 42 42 260 7.5 350 kHz g A A mV
Symbol
Condition
Min
Typ
Max
Unit
OUTPUT SWITCH (Note 2)
Saturation Voltage 1 VCE (sat1) Darlington Connection, ISW = 1.0A, Pins 1, 8 Connected TA = Full range Darlington Connection, ISW = 1.0A, RPIN 8 = 82 to VCC, Forced = 20, TA = Full range ISW = 1.0A, VCE = 5V VCE = 40V, TA = Full range 50 1.0 1.3 V
Saturation Voltage 2 (Note 3) DC Current Gain Collector Off-State Current
VCE (sat2) hFE IC(OFF)
0.45 75 40
0.7
V -
100
A
COMPARATOR
1.225 Threshold Voltage Vth Note 4 TA = Full range Threshold Voltage Line Regulation Input Bias Current Regline IIB VCC = 5.0V to 40V, TA = Full range Vin = 0V, TA = Full range 1.238 1.21 1.4 -20 1.25 1.25 1.275 1.263 1.29 5.0 -400 mV nA V
TOTAL DEVICE
VCC = 5V to 40V, CT = 1.0nF, Pin 7 = VCC, Vpin 5 > Vth, Pin 2 = Gnd, remaining pins open TA = Full range
Supply Current
ICC
50
75
mA
Note 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Note 3. If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents ( 300 mA) and high driver currents ( 30 mA), it may take up to 2.0 ms for it to come out of saturation. This condition will shorten the off time at frequencies 30 kHz, and is magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive condition is recommended: Forced of output switch: lC output lC driver - 7.0 mA * 10
GM34063V2.00
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* The 100 resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Note 4. 1% accuracy is available upon special request
GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Typical Application Circuits
R7 0 8 Rsc 0.1 1/2W VIN 1 R9 330
R5 220 U2 CEM9435A
7
2
GM34063
6 3 C2 470pF 50V C.C.
R6 10 C4 0.1uF 50V C.C. D1 MBRS140 MBRS320 MBRS340
L2 220uH
C13 100uF 16V Low ESR
5
4
R17 0
VOUT 5V
R1 15K 1%
Optional
R2 5K 1%
C5 1000pF 50V C.C.
Optional
C15 470uF 6.3V Low ESR
Figure 1 Step Down with External MOS Transistor
GM34063V2.00
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GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Typical Performance Characteristics
2.0 1.8 VCE Saturation Voltage (V) ICC Supply Current (mA) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0
VCC = 5V Pin 1, 7, 8 = VCC Pin 3, 5 = GND TA = 25C
3.6 3.2 2.8 2.4 2.0 1.6 1.2 0.8 0.4 0 0 5
CT = 1.0nF Pin 7 = VCC Pin 2 = GND
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 lE Emitter current (A) Figure 1: Emitter Follows Configuration Output
10 15 20 25 30 VCC Supply Voltage (V)
35
40
Figure 2: Standby Supply Current vs. Supply Voltage VCE (SAT) (mV) 1000 950 900 850
VCE(sat) Saturation Voltage (V)
1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0
Darlington Connection
VCC = 5V IC = 1A
VCC = 5V Pin 7 = VCC Pin 2, 3, 5 = GND TA = 25C
800 750 -40
0
0.2
0.4 0.6 0.8 1.0 1.2 1.4 IC Collector Current (A)
0
40
80
120
TJ (C)
Figure 3: Common Emitter Configuration Output Switch Saturation Voltage vs. Collector Current
Figure 4: Darlington Configuration Collector Emitter Saturation Voltage (VCE(SAT)) vs. Temperature
VIPK(sense) Current Limit Sense Voltage (V)
400 380 360 340 320 300 280 260 240 220 200 -55 -25 0 25 50 75 100 125 Ton-off Output Switch on-off Time (V)
VCC = 5V Ichg = Idischg
1000 500 200 100 50 20 10 5.0 2.0 1.0
0.02 0.01 0.05 0.1 0.2 0.5 1.0 2.0 VCC = 5V Pin 7 = VCC Pin 5 = GND TA = 25C
ton
GM34063V2.00
toff
5.0 10
TA, AMBIENT TEMPERATURE (C) Figure 5: Current Limit Sense Voltage Vs. Temperature
CT, Oscillator Timing Capacitor (nF) Figure 6: Output Switch On-Off Time vs. Oscillator Timing Capacitor
8
GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Package Outline Dimensions - SO 8
0.189 - 0.197 (4.800 - 5.004)
0.228 - 0.244 (5.791 - 6.198) 0.016 - 0.050 (0.406 - 0.270)
D
0.014 - 0.020 (0.356 - 0.508)
0.050 (1.270) TYP 0.053 - 0.059 (1.346 - 1.753)
0.150 - 0.157 (3.810 - 3.988)
SEATING PLAN
0.004 - 0.010 (0.012 - 0.254)
0.008 - 0.010 (0.203 - 0.254)
8.0 MAX
Package Outline Dimensions - DIP 8
0.250 +/- 0.005 (6.350 +/- 0.127)
0.370 - 0.400 (9.474 - 10.150)
0.06 (1.524) 0.145 - 0.200 (3.683 - 5.080)
0.300 - 0.320 (7.620 - 8.128)
0.125 - 0.140 (3.175 - 3.556) 0.045 +/- 0.015 (1.143 +/- 0.183) 0.100 +/- 0.010 (2.540 +/- 0.254) 0.108 +/- 0.003 (0.457 +/- 0.076)
J
0.009 - 0.010 (0.299 - 0.381) 95 +/- 5
GM34063V2.00
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GM34063 series
1.5A DC TO DC CONVERTER CONTROL
Ordering Number
GM 34063E S8
APM Gamma Circuit Type 34063 34063E 34063F Package Type S8: SO 8 D8: DIP 8
R
Shipping Type R: Taping & Reel T: Tube
G
Blank: Pb-free G:Green
Note: Pb-free products: RoHS compliant and compatible with the current require-ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes with 100% matte tin (Sn) plating. Lead-free (RoHS compliant) Halogen free(Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by weight)
Green products:
GM34063V2.00
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