MC34063A
DC/DC CONVERTER CONTROL CIRCUIT
SPEC NO: DS34063A-00
! FEATURES
! DESCRIPTION
The MC34063A by
" 3V to 30V Input Voltage Operation.
" Internal 1.6A Peak Current Switch.
" Internal ±1.8% Reference.
Analog
Integrations
Corporation, an improved second source over the
industrial standard MC34063A, is a monolithic
control circuit containing the primary functions
required for DC/DC converters. The device
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 device is
specifically designed to be incorporated in step-
down, step-up and voltage-inverting applications
with a minimum number of external components.
The ±1.8% internal reference and low quiescent
current of 1.6mA are among the improvements of
the device over the competition.
" Low Quiescent Current at 1.6mA.
" Frequency Operation from 100Hz to 100KHz.
" Current Limiting.
! APPLICATIONS
" Saver for Cellular phones
" DC-DC Converter Module
! TYPICAL APPLICATION CIRCUIT
VOUT
200µH
L
+
D1
1N5819
CO
1
2
8
7
DRI
IPK
VCC
FB
SC
SE
*RS
8.6V SAVER
*:Io=0.3/RS
VIN
C1
3
4
6
5
TC
RB
+
GND
33K
CT
100µF
RA
5.6K
MC34063A
Saver Circuit for Cellular Phone
! ORDERING INFORMATION
MC34063A XX
ORDER NUMBER
PIN CONFIGURATION
TOP VIEW
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
MC34063ACN
(PLASTIC DIP)
1
2
3
4
8 DRI
SC
SE
7
6
5
IPK
TEMPERATURE
C: 0°C~+70°C
VCC
TC
MC34063ACS
(PLASTIC SO)
FB
GND
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
4F,9IndustryE.9thRoad,Science-basedIndustrialPark,Hsinchu,Taiwan, R.O.C.
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