SP34063A Datasheet, PDF (4/10 Pages) Sipex Corporation – 1.5A Buck/Boost/Inverting DC-DC Switching Regulator

PIN DESCRIPTION
Pin
Number
Pin Name
Description
1
Switching Collector Internal switch transistor collector.
2
Switching Emitter Internal switch transistor emitter.
3
Timing Capacitor Timing capacitor to control the switching frequency.
4
GND
Ground pin for all internal circuit.
5
Comparator
Inverting input pin for internal comparator.
Inverting Input
6
V_CC
Voltage supply
7
I Sense
Peak Current Sense Input by monitoring the voltage drop across an
PK
external I sense resistor to limit the peak current through the switch.
8
Driver Collector Voltage driver collector
BLOCK DIAGRAM
Driver ⁸
Collector
I _PK ⁷
Sense
V_CC ⁶
Comparator 5
Inverting
Input
B
A
SQ
R
I _PK
CT
OSC
+
-
1.25V
Reference
Regulator
1 _Switch
Collector
2 Switch
Emitter
3
Timing
Capacitor
4 _GND
Date: 1/11/05
SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator
4
© Copyright 2005 Sipex Corporation