General Description

The TC110 is a step-up (Boost) switching controller that furnishes output currents of up to 300mA while delivering a typical efficiency of 84. The TC110 normally operates in pulse width modulation mode (PWM), but automatically switches to pulse frequency modulation (PFM) at low output loads for greater efficiency. Supply current draw for the 100kHz version is typically only 50µA, and is reduced to less than 0.5µA when the SHDN input is brought low. Regulator operation is suspended during shutdown. The TC110 accepts input voltages from 2.0V to 10.0V, with a guaranteed start-up voltage of 0.9V.

The TC110 is available in a small 5-Pin SOT-23A package, occupies minimum board space and uses small external components (the 300kHz version allows for less than 5mm surface-mount magnetics).

Features

• Assured Start-up at 0.9V

• 50µA (Typ) Supply Current (fOSC = 100kHz)

• 300mA Output Current @ VIN ≥ 2.7V

• 0.5µA Shutdown Mode

• 100kHz and 300kHz Switching Frequency Options

• Programmable Soft-Start

• 84 Typical Efficiency

• Small Package: 5-Pin SOT-23A

Applications

• Palmtops

• Battery-Operated Systems

• Positive LCD Bias Generators

• Portable Communicators

TC110属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。微芯科技股份有限公司制造生产的TC110DC-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。