CP34063 Datasheet, PDF (1/10 Pages) Ceramate Technical – 1.5A,Step-Up/Down/Inverting Switching Regulators

CP34063
1.5A,Step-Up/Down/Inverting Switching Regulators
The CP34063 Series is a monolithic control circuit containing the
primary functions required for DC–to–DC converters. These devices
consist 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 was specifically
designed to be incorporated in Step–Down and Step–Up and
Voltage–Inverting applications with a minimum number of external
components.
• Operation from 3.0 V to 40 V Input
• Low Standby Current
• Current Limiting
• Output Switch Current to 1.5 A
• Output Voltage Adjustable
• Frequency Operation to 100 kHz
• Precision 2% Reference
Drive ⁸
Collector
I_pk ⁷
Sense
6
V_CC
Comparator ⁵
Inverting
Input
S Q ^Q2
R
Q1
100
I_pk
Oscillator
C_T
Comparator
+
1.25 V
Reference
-
Regulator
1 _Switch
Collector
2 _Switch
Emitter
3 _Timing
Capacitor
4
Gnd
(Bottom View)
This device contains 51 active transistors.
Figure 1. Representative Schematic Diagram
8
1
PDIP–8
8
1
SOP–8
PIN CONNECTIONS
1
8
2
7
3
6
4
5
1 - Switch Collector
2 - Switch Emitter
3 - Timing Capacitor
4 - Gnd
5 - Comparator Inverting Input
6 - Vcc
7 - Ipk Sense
8 - Driver Collector
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
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Rev 1.1 Jul.18,2003