Step Down / Step Up / Inverting DC-DC Converter
FEATURES
Operating from 3V to 40V
Low Standby Current
Current Limiting
Output Switch Current to 1.2A
Output Voltage Adjustable
Operation Frequency up to 180kHz (C
T
=100pF)
Precision 2% Reference
Available in SOP-8 and DIP-8 Packages
Moisture Sensitivity Level 3 for SMD Package
MC34063C
SOP-8 PKG
DIP-8 PKG
APPLICATION
Battery Chargers
NICs / Switches / Hubs
ADSL Modems
Negative Voltage Power Supplies
ORDERING INFORMATION
Device
MC34063CD
MC34063CN
Package
SOP-8
DIP-8
DESCRIPTION
The 34063C is a monolithic switching regulator control circuit containing the primary functions required for
DC-DC converters. This device consists of internal temperature compensated reference, voltage comparator,
controlled duty cycle oscillator with active current limit circuit, driver and high current output switch. The device
is specifically designed to be used in Step-Down, Step-Up and Voltage-Inverting applications with a minimum
number of external components.
The MC34063C is the enhanced version of MC34063A/B with the ability to work in higher frequency.
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.
40
40
40
40
40
40
100
1.2
UNIT
V
V
V
V
V
V
mA
A
Apr. 2011 - Rev.1.2
-
1
-
HTC
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
