TC105集成電路（IC）的DC-DC開關(guān)控制器規(guī)格書PDF中文資料

TC105屬于集成電路（IC）的DC-DC開關(guān)控制器。由微芯科技股份有限公司制造生產(chǎn)的TC105DC-DC 開關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開關(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。

General Description

The TC105 is a step-down (Buck) switching controller that furnishes output currents of up to 1A (max) while delivering a typical efficiency of 92. The TC105 normally operates in pulse width modulation mode (PWM), but automatically switches to pulse frequency modulation (PFM) at low output loads for greater efficiency. Oscillator frequency is 300kHz, allowing use of small (22μH) inductors. Supply current draw is only 102μA (max), and is reduced to less than 0.5μA when the SHDN input is brought low. Regulator operation is suspended during shutdown. The TC105 accepts a maximum input voltage of 10V.

Features

? 57μA (Typ) Supply Current

? 1A Output Current

? 0.5μA Shutdown Mode

? 300kHz Switching Frequency for Small Inductor Size

? Programmable Soft-Start

? 92 Typical Efficiency

? Small Package: 5-Pin SOT-23A

Applications

? Palmtops

? Battery-Operated Systems

? Portable Instruments

? Positive LCD Bias Generators

? Portable Communicators

? Hand-Held Scanners

? 5V to 3V Down Converters