FEATURES

· 8 To 35V Operation

· 5V Reference Trimmed To ±1%

· 1Hz To 400kHz Oscillator Range

· Dual 100mA Source/Sink Outputs

· Digital Current Limiting

· Double Pulse Suppression

· Programmable Deadtime

· Under-Voltage Lockout

· Single Pulse Metering

· Programmable Soft-Start

· Wide Current Limit Common Mode Range

· TTL/CMOS Compatible Logic Ports

· Symmetry Correction Capability

· Guaranteed 6 Unit Synchronization

DESCRIPTION

The UC1526 is a high performance monolithic pulse width modulator

circuit designed for fixed-frequency switching regulators and other

power control applications. Included in an 18-pin dual-in-line package

are a temperature compensated voltage reference, sawtooth oscillator,

error amplifier, pulse width modulator, pulse metering and

setting logic, and two low impedance power drivers. Also included

are protective features such as soft-start and under-voltage lockout,

digital current limiting, double pulse inhibit, a data latch for single

pulse metering, adjustable deadtime, and provision for symmetry correction

inputs. For ease of interface, all digital control ports are TTL

and B-series CMOS compatible. Active LOW logic design allows

wired-OR connections for maximum flexibility. This versatile device

can be used to implement single-ended or push-pull switching regulators

of either polarity, both transformerless and transformer coupled.

The UC1526 is characterized for operation over the full military

temperature range of -55°C to +125°C. The UC2526 is characterized

for operation from -25°C to +85°C, and the UC3526 is characterized

for operation from 0° to +70°C.