TC125301ECTTR中文资料PFM Step-Up DC/DC Regulators数据手册Microchip规格书

描述 Description

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 modula tion (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.
The TC126 has separate output voltage sensing and chip power inputs for greater application flexibility. The TC125 combines the output voltage sensing and chip power inputs onto a single package pin, but adds a power-saving shutdown mode that suspends regulator operation and reduces supply current to less than 0.5µA when the shutdown control input (SHDN) is low.
The TC125/TC126 are available in a small 5-Pin SOT-23A package, occupy minimum board space and use small external components. The TC125 accepts input voltages from 2V to 10V. The TC126 accepts input voltages from 2.2V to 10V. Both the TC125 and TC126 have a start-up voltage of 0.9V at light load.

特性 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-23AApplications
• Palmtops/PDAs
• Battery-Operated Systems
• Cameras
• Portable Communicators

应用 Application

• Palmtops/PDAs
• Battery-Operated Systems
• Cameras
• Portable Communicators