1

System Logic

Semiconductor

SLS

DC-TO-DC CONVERTER CONTROL CIRCUITS

The SL34063A 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.

FEATURES

FUNCTIONAL BLOCK DIAGRAM

• 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

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Power Supply Voltage

40

Vdc

Comparator Input Voltage Range

-0.3 to +40 Vdc

Switch Collector Voltage

40

Vdc

Switch Emitter Voltage (Vpin 1 = 40 V)

40

Vdc

Switch Collector to Emitter Voltage

40

Vdc

Driver Collector Voltage

40

Vdc

Driver Collector Current (Note 1)

100

mA

Switch Current

1.5

A

Power Dissipation and Thermal Characteristics

Thermal Resistance

Thermal Resistance

Thermal Resistance

1.25

100

1.25

100

625

160

W

°C/W

W

°C/W

mW °C/

W

Operating Junction Temperature

TJ

+150

°C

Operating Ambient Temperature Range

0 to +70

°C

Storage Temperature Range

Tstg

-65to+150 °C

SL34063A