General Description

The TC125/126 step-up (Boost) switching regulators furnish output currents to a maximum of 80mA (VIN = 2V, VOUT = 3V) with typical efficiencies above 80. These devices employ pulse frequency modulation (PFM) for minimum supply current at low loads. They are ideal for battery-operated applications powered from one or more cells. Maximum supply current is less than 70μA at full output load, and less than 5μA in standby (VOUT = 3V). Both devices require only an external inductor, diode, and capacitor to implement a complete DC/DC regulator.

Features

? Assured Start-up at 0.9V

? PFM (100kHz Max Operating Frequency)

? 40μA Maximum Supply Current (VOUT = 3V @ 30mA)

? 0.5μA Shutdown Mode (TC125)

? Voltage Sense Input (TC126)

? Requires Only Three External Components

? 80mA Maximum Output Current

? Small Package: 5-Pin SOT-23A

Applications

? Palmtops/PDAs

? Battery-Operated Systems

? Cameras

? Portable Communicators

TC126屬于集成電路（IC） > 線性 + 開關(guān)穩(wěn)壓器。微芯科技股份有限公司制造生產(chǎn)的TC126穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負(fù)載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。