General Description

The AP2004 integrates Pulse-Width-Modulation (PWM) control circuit into a single chip, mainly designs for power-supply regulator. All the functions include an on-chip 1.25V reference output, an error amplifier, an adjustable oscillator, a soft-start, UVLO, SCP circuitry, and a push-pull output circuit. Switching frequency is adjustable by trimming CT. During low VCC situation, the UVLO makes sure that the outputs are off until the internal circuit operates normally.

特性 Features

- PWM Buck Control Circuitry

- Operating voltage can be up to 27V

- Under voltage Lockout (UVLO) Protection

- Short Circuit Protection (SCP)

- Soft-start circuit

- Variable Oscillator Frequency -- 300Khz Max

- 1.25V voltage reference Output

- 8-pin PDIP and SOP packages

Applications

- Backlight inverter

- LCD Monitor

- XDROM, XDSL Product

- DC/DC converters in computers, etc.