SG1524/SG2524/SG3524

4/90 Rev 1.1 2/94

Copyright

© 1994

11861 Western Avenue

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∞ Garden Grove, CA 92841

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(714) 898-8121

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∞ FAX: (714) 893-2570

REGULATING PULSE WIDTH MODULATOR

FEATURES

••••• 8V to 40V operation

••••• 5V reference

••••• Reference line and load regulation of 0.4%

••••• Reference temperature coefficient < ± 1%

••••• 100Hz to 300KHz oscillator range

••••• Excellent external sync capability

••••• Dual 50mA output transistors

••••• Current limit circuitry

••••• Complete PWM power control circuitry

••••• Single ended or push-pull outputs

••••• Total supply current less than 10mA

HIGH RELIABILITY FEATURES - SG1524

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♦ Available to MIL-STD-883B and DESC SMD

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♦ MIL-M-38510/12601BEA - JAN1524J

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♦ Radiation data available

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♦ LMI level "S" processing available

BLOCK DIAGRAM

DESCRIPTION

This monolithic integrated circuit contains all the control circuitry for a

regulating power supply inverter or switching regulator. Included in a 16-

pin dual-in-line package is the voltage reference, error amplifier, oscillator,

pulse width modulator, pulse steering flip-flop, dual alternating output

switches and current limiting and shut-down circuitry. This device can be

used for switching regulators of either polarity, transformer coupled DC to

DC converters, transformerless voltage doublers and polarity converters,

as well as other power applications. The SG1524 is specified for operation

over the full military ambient temperature range of -55°C to +125°C, the

SG2524 for -25°C to +85°C, and the SG3524 is designed for commercial

applications of 0°C to +70°C.