UNIVERSAL DC/DC CONVERTER
FSP34063
FEATURES
Operation from 3.0V to 40V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.6A
Output Voltage Adjustable
Frequency Operation to 100kHz
Precision 2% Reference
SOP8L and PDIP8L Packages
GENERAL DESCRIPTION
The FSP34063 Series is a monolithic control circuit
containing the primary functions required for DC-to-DC
converters. These devices consists of an internal
temperature compensated reference, comparator,
controlled duty cycle oscillator with an active current
limit circuit, driver and high current output switch. This
series is specifically designed for incorporating in
Step-Down and Step-Up and Voltage-Inverting
applications with a minimum number of external
components.
PIN CONFIGURATION
(Top View)
Switch Collector 1
Switch Emitter 2
Timing Capacitor 3
Gnd 4
8 Driver
7 I
PK
sensor
6 V
CC
5 Comparator inverting input
REPRESENTATIVE SCHEMATIC DIAGRAM
Driver
Collector
8
S
R
Ipk Sensor 7
Ipk
CT
Oscillator
Vcc 6
Comparator
+
Sw itch
1 Collector
Q
Q2
Q1
100
2 Sw itch
Emitter
3 Timing
Capacitor
Comparator
Inverting
Input
-
1.25V
Reference
Regulator
5
4 Gnd
1/10
2007-1-25
FOSLINK [ FOSLINK SEMICONDUCTOR CO.,LTD ]
