AIC1567

Switching Regulator and Low Dropout Linear Regulator on single chip.
Simple Voltage-Mode PWM Control.
Dual N-Channel MOSFET Synchronous Drive.
Fast Transient Response.
±1.0% 5-Bit Digital-to-Analog Output Voltage.
Adjustable Current Limit Without External Sense Resistor.
Full 0% to 100% Duty Ratio.
200KHz Free-Running Oscillator Programmable up to 350KHz.
Power-Good Output Voltage Monitor.
Short Circuit Protection with Low Short Circuit Output Current.

The AIC1567 is a high power, high efficiency switching regulator controller optimized for high performance microprocessor applications. It is designed to drive dual N-channel MOSFET in a standard synchronous buck topology.Featuring a low dropout linear regulator and a digitally programmable switching regulator, the AIC1567 includes monitoring and protection capabilities in addition to all the essential synchronous PWM control functions.The internal 5-bit Digital-to-Analog Converter (DAC) adjusts the output voltage from 2.0V to 3.5V in 0.1V increments and 1.3V to 2.0V in 0.05V increments. The precision reference and voltage-mode control can provide output regulation within ±1.0% over temperature and line voltage shifts.

The internal oscillator of the AIC1567 free-runs at 200KHz and can be adjusted up to 350KHz. The resulting PWM duty ratio ranges from 0% to 100%. The error amplifier features a 11MHz bandwidth and 6V/S slew rate, which enables high converter bandwidth for fast transient response.