LX1681CDM集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開(kāi)關(guān)式控制器規(guī)格書(shū)PDF中文資料

LX1681CDM屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開(kāi)關(guān)式控制器。由美高森美公司制造生產(chǎn)的LX1681CDMDC-DC 開(kāi)關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開(kāi)關(guān)式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓?fù)浣Y(jié)構(gòu)可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。

DESCRIPTION

The LX1681/1682 are monolithic, pulsewidth modulator controller ICs. They are designed to implement a flexible, low cost buck (step-down) regulator supply with minimal external components.

The LX1681 is a non-synchronous controller; the LX1682 has a synchronous driver for higher efficiency.

KEY FEATURES

■ Fixed 200kHz Switching Frequency

■ Constant Frequency Voltage-Mode Control Requires NO External Compensation

■ Hiccup-Mode Over-Current Protection

■ High Efficiency

■ Output Voltage Set By Resistor Divider

■ Under-Voltage Lockout

■ Soft-Start And Enable

■ Synchronous Rectification (LX1682)

■ Non-Synchronous Rectification (LX1681)

■ Small, 8-pin Surface Mount Package

APPLICATIONS

■ 5V to 3.3V Or Less Buck Regulators

■ FPGA Supplies

■ Microprocessor Chipset Supplies (e.g. Camino, Whitney, etc.)

■ Rambus? RIMMTM Supplies

■ Hard Disk Drives

■ Computer Add-on Cards