AP3581B Overview
The AP3581A/B/C operates at fixed frequency of 300kHz (AP3581A/B) or 200kHz (AP3581C) and provides an optimal level of integration to reduce size and cost of the power supply. This controller integrates internal MOSFET drivers that support 12V+12V bootstrapped voltage for highefficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count.
AP3581B Key Features
- Supply Voltage: 5V/12V
- VIN Input Range: 3.0V to 13.2V
- 0.6V/0.8V to 80% of VIN Output Range
- Internal Reference: 0.6V/0.8V
- Simple Single-loop Control
- Voltage-mode PWM Control
- Duty Cycle: 0% to 80%
- Fast Transient Response
- Fixed Oscillator Frequency: 300kHz/200kHz
- Lossless, Programmable Over Current Protection
AP3581B Applications
- Power Supplies for Microprocessors/Peripherals