onsemi FAN1577AMX

Buck Regulator Positive Output Step-Down DC-DC Controller IC 20-SOP

Dual Switching Controller, Voltage-mode, 372kHz Switching Freq-Max, PDSO20

Buck Tape & Reel (TR) e3 ALSO OPERATES IN ADJUSTABLE VOLTAGE AS LOW AS 0.7V DC to DC switching controller 7.5mm 15V 340kHz -40C~85C TA

The FAN1577A is a high-efficiency, voltage-mode, dual-channel, synchronous DC-DC PWM controller for two independent outputs. The two channels are operated out of phase. The internal reference voltage is trimmed to 0.7 V 1.0%. It is connected to the error amplifier’s positive terminal for voltage feedback regulation. A soft-start circuit ensures the output voltage can be gradually and smoothly increased from zero to its final regulated value. The soft-start pin can also be used for chip-enable function. When two soft-start pins are grounded, the chip is disabled, and the total operation current can be reduced to under 0.7 mA. The fixed-frequency is programmable from 61 kHz to 340 kHz. The Over-Current Protection (OCP) level can be programmed by an external current-sense resistor. It has two integrated sets of internal MOSFET drivers. FAN1577A is available in a 20-pin small-outline package (SOP).