This manual describes the function and characteristics of UC1525A/27A, UC2525A/27A, UC3525A/27A regulating pulse width modulators.
This document provides technical specifications and application information for the UNITRODE UC1525A/27A, UC2525A/27A, and UC3525A/27A series of Regulating Pulse Width Modulators. These integrated circuits are designed to offer improved performance and a lowered external parts count for switching power supply designs. Key features include an on-chip +5.1V reference trimmed to +1%, a wide oscillator frequency range from 100Hz to 500kHz, and built-in soft-start circuitry requiring only an external timing capacitor.
| Supply Voltage | 8 to 35V |
|---|---|
| Oscillator Frequency Range | 100Hz to 500kHz |
| Reference Voltage | +5.1V |
| Reference Voltage Accuracy | +1% |
| Output Current (Source or Sink) | 500mA |
| Operating Junction Temperature | -58°C to +150°C |
| Power Dissipation (Ta = +25°C) | 1000mW |
| Output Low Level (IsINK = 20mA) | 0.2V |
The devices operate with a supply voltage range of 8 to 35V.
Yes, these devices feature built-in soft-start circuitry requiring only an external timing capacitor.
The oscillator frequency range extends up to 500kHz.