The UC1526, UC2526 and UC3526 are three high-performance pulse width modulator chips. They include 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 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. All digital control ports are compatible with TTL and B-series CMOS for easy interface. 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.
This document is a datasheet for the UNITRODE UC1526, UC2526, and UC3526, which are high-performance monolithic pulse width modulator circuits designed for fixed-frequency switching regulators and other power control applications. The devices operate with an input voltage range of 8 to 35V and include features such as a temperature-compensated voltage reference, sawtooth oscillator, error amplifier, and pulse width modulator.
| Input Voltage Range | 8 to 35V |
|---|---|
| Oscillator Frequency Range | 1Hz to 400kHz |
| Reference Output Voltage | 5.00V |
| Source/Sink Load Current | 200mA |
| Power Dissipation | 1000mW |
The UC2526 is characterized for operation from -25°C to +85°C.