The AZ494A/C is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control. The AZ494A/C consists of a reference voltage circuit, two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, and an output control circuit. The precision of voltage reference (VREF) is improved up to ±1% through trimming and this provides a better output voltage regulation. The AZ494A/C provides for push-pull or single-ended output operation, which can be selected through the output control.

Features

·Stable 4.95V/5V Reference Voltage Trimmed to ±1.0% Accuracy
·Uncommitted Output TR for 200mA Sink or Source Current
·Single-End or Push-Pull Operation Selected by Output Control
·Internal Circuitry Prohibits Double Pulse at Either Output
·Complete PWM Control Circuit with Variable Duty Cycle
·On-Chip Oscillator With Master or Slave Operation