DC-DC Converter Control Circuits
FEATURES
Output Switch Current In Excess of 1.5A
2% Reference Accuracy
Low Quiescent Current : 2.5mA(Typ.)
Operating From 3V to 40V
Frequency Operation to 100KHz
Active Current Limiting
Moisture Sensitivity Level 3D
MC34063AG is Halogen Free Products
MC34063A/B
SOP-8 PKG
DIP-8 PKG
APPLICATION
Battery Chargers
NICs / Switches / Hubs
ADSL Modems
Negative Voltage Power Supplies
ORDERING INFORMATION
Device
MC34063AD
MC34063AGD
MC34063BD
MC34063AN
DIP-8
SOP-8
Package
DESCRIPTION
The MC34063A/B series is a monolithic control circuit delivering the main functions for DC-DC voltage
converting. The device contains an internal temperature compensated reference, comparator, duty cycle
controlled oscillator with an active current limit circuit driver and high current output switch.
Output voltage is adjustable through two external resistors with a 2% reference accuracy.
Employing a minimum number of external components the MC34063A/B devices series is designed for Step-
Down, Step-Up and Voltage-Inverting applications.
Absolute Maximum Ratings
(Note 1)
CHARACTERISTIC
Power Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage(V
SWC
=40V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current
(Note 2)
Switch Current
SYMBOL
V
CC
V
IR
V
SWC
V
SWE
V
CE
V
dc
I
dc
I
SW
MIN.
-
-0.3
MAX.
50
40
40
40
40
UNIT
V
V
V
V
V
V
mA
A
-
-
-
40
100
1.5
Jan. 2011 - Rev. 1.0
-
1
-
HTC