ISL6525

DATASHEET ISL6525 Buck and Synchronous-Rectifier Pulse-Width Modulator (PWM) Controller FN4998 Rev 3.00 Dec 27, 2004 The ISL6525 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 ISL6525 integrates all of the control, output adjustment, monitoring and protection functions into a single package. A programmable delay time for the PGOOD signal makes it especially suitable for the VTT regulation in VRM8.5 applications. The output voltage of the converter can be precisely regulated to as low as 1.20V, with a maximum tolerance of 1% over temperature and line voltage variations. The ISL6525 provides simple, single feedback loop, voltagemode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. The error amplifier features a 15MHz gai...