L6997S Datasheet PDF - ST Microelectronics

●Description

●The device is a high efficient solution for networking dc/dc modules and mobile applications compatible with 3.3V bus and 5V bus.

●It"s able to regulate an output voltage as low as 0.6V. The constant on time topology assures fast load transient response. The embedded voltage feed-forward provides nearly constant switching frequency operation in spite of a wide input voltage range. An integrator can be introduced in the control loop to reduce the static output voltage error.

●The remote sensing improves the static and dynamic regulation, recovering the wires voltage drop.

●Pulse skipping technique reduces power consump tion at light loads. Drivers current capability allows output currents in excess of 20A.

●Features

●■ FROM 3V TO 5.5V VCC RANGE

●■ MINIMUM OUTPUT VOLTAGE AS LOW AS 0.6V

●■ 1V TO 35V INPUT VOLTAGE RANGE

●■ CONSTANT ON TIME TOPOLOGY

●■ VERY FAST LOAD TRANSIENTS

●■ 0.6V, ±1% VREF

●■ SELECTABLE SINKING MODE

●■ LOSSLESS CURRENT LIMIT, AVAILABLE ALSO IN SINKING MODE

●■ REMOTE SENSING

●■ OVP,UVP LATCHED PROTECTIONS

●■ 600µA TYP QUIESCENT CURRENT

●■ POWER GOOD AND OVP SIGNALS

●■ PULSE SKIPPING AT LIGTH LOADS

●■ 94% EFFICIENCY FROM 3.3V TO 2.5V

●Applications

●■ NETWORKING

●■ DC/DC MODULES

●■ DISTRIBUTED POWER

●■ MOBILE APPLICATIONS

●■ CHIP SET, CPU, DSP AND MEMORIES SUPPLY