General Description
The HT82P604B provides complete control and protection for a DC-DC converter optimized for high performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous-rectified buck topology. The HT82P604B integrates all of the control, output adjustment, monitoring and protection functions into a single package.

Features
• Operating voltage: 5V~12V
• Drives two N-Channel MOSFETs
• Simple single-loop control design
    - Voltage-mode PWM control
• Fast transient response
    - High-bandwidth error amplifier
    - Full 0% to 100% duty ratio
• Excellent output voltage regulation
    - ±1% over line voltage and temperature
• 5bitdigital-to-analog output voltage selection
    - Wide range -1.3V to 3.5V
    - 0.1V binary steps from 2.1V to 3.5V
    - 0.05V binary steps from 1.3V to 2.05V
• Power-good output voltage monitor
• Over-voltage and over-current sensing element, uses MOSFETs rDS (ON)
• Small converter size
    - Constant frequency operation
    - 200kHz free-running oscillator programmable from 50kHz to over 1MHz

Applications
• Power supply for PentiumTM, PentiumTM Pro, PowerPCTM and AlphaTM Microprocessors
• High-power5Vto3.xVDC-DCregulators
• Low-voltage distributed power supplies