ISL6534 Datasheet (Intersil)

ISL6534, Dual PWM

, page 9) 2 FN9134.1 Block Diagram SS1/EN1 SS2/EN2 SS3/EN3 VCC5 30 µA VCC5 30 µA VCC5 30 µA 3.3V ISL6534 VCC POWER ON RESET AND CONTROL VREF VCC5 5.8V REFERENCE 3.3V BIAS CURRENT 0.6V 3.3V PGOOD = all 3 SS ramps done with no COMP short CLOCK AND SAWTOOTH GENERATOR PGOOD COMP1 FB1 REFIN

® Data Sheet December 21, 2004 ISL6534 FN9134.1 Dual PWM with Linear The ISL6534 is a versatile triple regulator that has two independent synchronous-rectified buck controllers with integrated 12V gate drivers (OUT1 and OUT2) and a linear controller (OUT3) to offer precision regulation of up to three voltage rails.

An optional shunt regulator allows 12V only operation, when a 5V supply is not available.

Each controller has independent soft-start and enable functions combined on a single pin.

ISL6534 Features

* Two Synchronous-Rectified Buck Controllers - Voltage Mode control - VIN range up to 12V - VOUT range from 0.6V to 6V - 12V LGATE drivers; up to 12V Boot Strap for UGATE

* Switcher References - 0.6V Reference for OUT1 (0.8% Accurate) - 3.3V Reference Output for OUT2 (0.8% Accurate)