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DC TO DC CONVERTER CONTROLLER
DESCRIPTION
FEATURES
*Operation from 3.0V to 40V.
*Short circuit current limiting.
*Low standby current.
*Output switch current of 1.5A without external
transistors.
*Frequency of operation from 100Hz to 100kHz.
*Step-up, step-down or inverting switch regulators.
DIP-8
SOP-8
BLOCK DIAGRAM
8
7
5
4
2
1
3
6
Q
S
R
C
E
T1
T2
A
Is
D
B
CT
Vcc
GND
TIMING
CAPACITOR
SWITCH
EMITTER
SWITCH
COLLECTOR
1.25Vref
COMP.
OSCILLATOR
COMPARATOR
INVERTING INPUT
Ipeak
SENSE
DRIVE
COLLECTOR
TMC
TD34063
T he TD34063 Series is a monolithic control circuit containing the
primary functions required for DC to DC converters. T hese 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. T his series was specifically
designed to be incorporated in Step-Down and Step-Up and
Voltage-Inverting applications with a minimum number of external
components.
PIN CONFIGURATION
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
Driver
Collector
Ipk Sense
Vcc
Comparator
Inverting input
1
2
3
4
8
7
5
6
ORDERING INFOR
Device
Operating
Temperature Range
Package
T
A = 0°C to +70°C
PDIP-8
T
A = 0°C to +70°C
SOP-8
MATION
TD34063
TD34063