Keystone Electronics 3583

General Description

The AP3583/A is a simple single-phase synchronous buck controller. It operates from 5V or 12V supply voltage and delivers high quality output voltage as low as 0.6V. This device operates at fixed 200kHz (AP3583) or 300kHz (AP3583A) frequency and provides an optimum compromise between efficiency, external component size and cost.

Features

• Supply Voltage: 5V/12V
• VIN Input Range: 3.0V to 13.2V
• 0.6V to 80% of VIN Output Range
• Internal Reference: 0.6V
• Support Tracking Mode and Stand-alone Mode
• Simple Single-loop Control
• Voltage-mode PWM Control
• Duty Cycle: 0% to 80%
• Fast Transient Response
• Fixed Oscillator Frequency: 200/300kHz
• Lossless, Programmable Over Current Protection (Uses Lower MOSFET RDS(ON) )
• Start-up into Pre-biased Output
• Built-in Thermal Shutdown
• Built-in Soft-start
• Over Current/Voltage Protection
• Under Voltage Protection
• Integrated Boot Diode

Applications

• Power Supplies for Microprocessors/Peripherals
• PCs, Embedded Controllers, Memory Supplies
• DSP and Core Communications Processor Supplies
• Subsystem Power Supplies
• PCI, AGP, Graphics Cards and Digital TV
• SSTL-2 and DDR/2/3 SDRAM Bus Termination Supply
• Cable Modems, Set Top Boxes, and DSL
• Modems
• Industrial Power Supplies and General Purpose Supplies
• 5V/12V Input DC-DC Regulators
• Low-voltage Distributed Power Supplies