TC105303ECT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

TC105303ECT属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由美国微芯科技公司制造生产的TC105303ECTDC-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。

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.

特性 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