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属于集成电路（IC） > 线性 + 开关稳压器。微芯科技股份有限公司制造生产的TC126稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。