AIC1569A

AIC1569A 5-bit DAC, Synchronous PWM Power Regulator FEATURES Compatible with HIP6004. Simple Voltage-Mode PWM Control. Dual N-Channel MOSFET Synchronous Drive. Fast Transient Response. ±1% 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. DESCRIPTION The AIC1569A is a high power, high efficiency switching regulator controller optimized for high performance microprocessor applications. It is designed to drive dual N-channel MOSFETs in a standard synchronous buck topology. Featuring a digitally programmable switching regulator, the AIC1569A 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 voltage shifts. The internal oscillator of the AIC1569A 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 an 11MHz bandwidth and 6V/µS slew rate, which enables high converter bandwidth for fast transient response. The AIC1569A provides adjustable over current and short circuit protections. It senses the output current across the on resistance of the upper Nchannel MOSFET without an e...