GM34063S8T Gamma Microelectronics, GM34063S8T Datasheet

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GM34063S8T

Manufacturer Part Number
GM34063S8T
Description
Manufacturer
Gamma Microelectronics
Datasheet
SCHEMATIC DIAGRAM
Application
Description
GM34063 has all the functions required for DC-to-DC
converters: an internal temperature- compensated ref-
erence, comparator, controlled duty cycle oscillator
with an active current limit circuit, driver, and high-
current output switch.
GM34063 is designed for step-down, step-up and volt-
age-inverting applications by using a minimum number
of external components.
CD-ROM
Motherboards
SMPS Power Supply
Driver Collector
MICROELECTRONICS
Comparator
Inverting Input
A
I
pk
Sense
V
5
6
8
7
CC
A
I
pk
Comparator
Oscillator
+
-
C
T
(Bottom View)
S
R
1.5A DC-TO-DC CONVERTER CONTROL CIRCUIT
Q
Reference
Regulator
1.25V
Features
100
3.0V to 40V input
Adjustable Output Voltage
Current Limiting
Output Switch Current to 1.5A
Low Standby Current
Operating Frequency to 100kHz
Precision 2% Reference
Q2
Power Management
Q1
Battery Chargers
DSL Modem
Switch Collector
Switch Emitter
Timing Capacitor
GND
1
3
4
2
www.gammamicro.com
GM34063
1

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GM34063S8T Summary of contents

Page 1

A A MICROELECTRONICS Description GM34063 has all the functions required for DC-to-DC converters: an internal temperature- compensated ref- erence, comparator, controlled duty cycle oscillator with an active current limit circuit, driver, and high- current output switch. GM34063 is designed for ...

Page 2

... Driver Collector GM34063 AYWW Switch Collector Switch Emitter ORDERING INFORMATION Ordering Number GM34063D8T GM34063S8T GM34063S8R * For detail Ordering Number identification, please see last page. 2 Power Management 1.5A DC-to-DC CONVERTER CONTROL CIRCUIT V CC Comparator Driver Collector Inventing Input 5 4 GND Switch Collector ...

Page 3

A A MICROELECTRONICS ABSOLUTE MAXIMUM RATINGS PARAMETER Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage ( PIN1 Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collector Current(Note 1) Switch Current Power ...

Page 4

A A MICROELECTRONICS ELECTRICAL CHARACTERISTICS CHARACTERISTICS OSCILLATOR Frequency ( 1.0nF 25°C) pin5 T Charge Current (V = 5.0V to 40V 25°C) CC Discharge Current (V = 5.0V to 40V ...

Page 5

A A MICROELECTRONICS Typical Performance Characteristics 2 1.8 1.6 1.4 1.2 1 0.8 0 Pin1 0.4 Pin GND 0 25° 0.2 0.4 0.6 0.8 1 ...

Page 6

A A MICROELECTRONICS Figure 7. External Current Boost Connections for I Peak Greater than 1.5A Test Line Regulation Load Regulation Output Ripple Efficiency Output Ripple With Optional Fitter Step - Up Converter 8 180 0. ...

Page 7

A A MICROELECTRONICS External Current Boost Connections for I Peak Greater than 1. Figure 6a. External NPN Switch If the output switch is driven into hard saturation (non-Darlington configuration) at low switch ...

Page 8

A A MICROELECTRONICS Figure 8. External Current Buck Connections for I Peak Greater than 1.5A Test Line Regulation Load Regulation Output Ripple Short Circuit Current Efficiency Output Ripple With Optional Fitter Step - Down Converter 0.33 ...

Page 9

A A MICROELECTRONICS External Current Buck Connections for I Peak Greater than 1. Oscillator Comparator 5 Figure 7a. External NPN Switch Oscillator ...

Page 10

A A MICROELECTRONICS Figure 9. External Current Boost Connections for I Peak Greater than 1.5A Test Line Regulation Load Regulation Output Ripple Short Circuit Current Efficiency Output Ripple With Optional Fitter Voltage Inverting Converter 0.24 6 ...

Page 11

A A MICROELECTRONICS External Current Boost Connections for I Peak Greater than 1. Oscillator Comparator + - 5 Figure 8a. External NPN Switch Oscillator ...

Page 12

A A MICROELECTRONICS Power Management 1.5A DC-to-DC CONVERTER CONTROL CIRCUIT Oscillator Comparator 1.25V + Reference - Regulator Figure ...

Page 13

A A MICROELECTRONICS DESIGN FORMULAS Step - Up Calculation out F IN(min off IN(min off off t ...

Page 14

A A MICROELECTRONICS SOP-8 PACKAGE OUTLINE DIMENSIONS 0 ~ 8° ° +0.0018 0.008 -0.0005 +0.013 0.028 -0.022 +0.05 0.200 -0.01 +0.33 0.710 -0.56 0.236 ± 0.008 +0.21 5.990 -0.20 0.154 3.91 ± 0.1 0.057 NOM 0.063 ± 0.005 1.450 NOM ...

Page 15

A A MICROELECTRONICS ORDERING NUMBER GM 34063 S8 R Gamma Micro. Circuit Type Power Management GM34063 1.5A DC-to-DC CONVERTER CONTROL CIRCUIT Shipping T: Tube R: Tape & Reel Package S8: SOP-8 D8: DIP-8 15 ...

Page 16

A A MICROELECTRONICS 16 Power Management GM34063 1.5A DC-to-DC CONVERTER CONTROL CIRCUIT ...

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