SC4605

Low Input, High Efficiency Synchronous, Step Down Controller POWER MANAGEMENT Description The SC4605 is a voltage mode step down (buck) regulator controller that provides accurate high efficiency power conversion from a input supply range of 2.8V to 5.5V. A high level of integration reduces external component count, and makes it suitable for low voltage applications where cost, size and efficiency are critical. The SC4605 drives external N-channel MOSFETs with 1A peak current. A non-overlap protection is provided for www.DataSheet4U.com the gate drive signals to prevent shoot through of the MOSFET pair. The voltage drop across the high side MOSFET during its conduction is sensed for lossless short circuit current limiting. The quiescent supply current in sleep mode is typically lower than 10µA. A 1.8ms soft start is internally provided to prevent output voltage overshoot during start-up. SC4605 Features ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ BICMOS voltage mode PWM controller 2.8V to 5.5V Input voltage range Output voltages as low as 0.8V +/-1% Reference accuracy Sleep mode (Icc = 10µA typ) Lossless adjustable short circuit current limiting Combination pulse by pulse & hiccup mode current limit High efficiency synchronous switching 0% to 97% Duty cycle range 1A Peak current driver 10-Pin MSOP package Applications Distributed power architecture Servers/workstations Local microprocessor core power supplies DSP and I/O power supplies Battery powered applications Telecommunications equipment D...