AIC1569A

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 control of AIC1569A can provide output regulation within 1% over temperature and line voltage shifts.

The AIC1569A includes an internal 200KHz free-running oscillator that 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/mS 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 by using the RDS(ON) of the upper N-channel MOSFET without an external low value sense resistor. It also monitors the output voltage with a window comparator and issues a power good signal when the output is within 10% of the rated output voltage.