L6997STR集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

L6997STR属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由意法半导体集团制造生产的L6997STRDC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。

描述 Description

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

Its 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.

特性 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