GM34063 series
1.5A DC TO DC
CONVERTER CONTROL
Description
GM34063 series have all the functions required for
DC-to-DC converters: an internal Temperature-
compensated 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 -40°C to 125°C while GM34063F can operate
from -25°C to 85°C.
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
S Q
6
V
CC
I
PK
Oscillator
C
T
I
PK
Sense
Comparator
+
-
5
Comparator
Inverting Input
7
R
Q2
Q1
100
2
Switch Emitter
3
Timing Capacitor
1.25V
V
REF
4
GND
GM34063
V2.00
1
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
V
CC
I
PK
Sense
Driver Collector
GM34063
V2.00
2
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: -40°C to 125°C
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: -25°C to 85°C
G: Green Product
A: Assembly / Test site code
Y: Year
GM34063
V2.00
3
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
GM34063
V2.00
4
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 (P
IN1
= 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
V
CC
V
IR
V
C()switch
V
E(switch)
V
CE(switch)
V
C(driver)
IC(driver)
I
SW
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
GM34063
V2.00
5
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