The SG3526 is a high performance pulse width modulator integrated

circuit intended for fixed frequency switching regulators and other power

control applications.

Functions included in this IC are a temperature compensated voltage

reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse

metering and steering logic, and two high current totem pole outputs ideally

suited for driving the capacitance of power FETs at high speeds.

Additional protective features include soft start and undervoltage lockout,

digital current limiting, double pulse inhibit, adjustable dead time and a data

latch for single pulse metering. All digital control ports are TTL and B–series

CMOS compatible. Active low logic design allows easy wired–OR

connections for maximum flexibility. The versatility of this device enables

implementation in single–ended or push–pull switching regulators that are

transformerless or transformer coupled. The SG3526 is specified over a

junction temperature range of 0° to +125°C.

• 8.0 V to 35 V Operation

• 5.0 V ±1% Trimmed Reference

• 1.0 Hz to 400 kHz Oscillator Range

• Dual Source/Sink Current Outputs: ±100 mA

• Digital Current Limiting

• Programmable Dead Time

• Undervoltage Lockout

• Single Pulse Metering

• Programmable Soft–Start

• Wide Current Limit Common Mode Range

• Guaranteed 6 Unit Synchronization