AT1604

www.DataSheet4U.com AT1604 5-Bit Synchronous-Rectifier PWM Controller Features ˙Drives two N-channel MOSFETs ˙Operates from +5V and +12V input ˙Simple single-loop control -Voltage-mode PWM control ˙Fast transient response - High-bandwidth error amplifier - Full 0% to 100% duty ratio ˙Excellent output voltage regulation - ± 1% over line voltage and temperature ˙TTL-compatible 5 bit digital-to-analog output voltage selection - Wide range 1.3VDc to 3.5VDC - 0.1V binary steps from 2.1VDC to 3.5VDC - 0.05V binary steps from 1.3VDC to 2.05VDC ˙Power-good output voltage monitor ˙Over-voltage and over-current fault monitors -Does not require extra current sensing element ˙Small converter size -Constant frequency operation -200 kHz free-running oscillator programmable from 50 kHz to over 1 MHz General Description The AT1604 provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N-channel MOSFETs in a synchronous-rectified buck topology. The AT1604 integrates all of the control, output adjustment, monitoring and protection functions into a single package. The AT1604 includes a fully-TTL compatible 5-bit digital-to-analog converter (DAC) that adjusts the output voltage from 2.1VDC to 3.5VDC in 0.1V increments and from 1.3VDC to 2.1VDC in 0.05V steps. The precision reference and voltage–mode regulator hold the selected output voltage to within ± 1% over temperature and line voltage variatio...