描述 Description

The UTC?L5201-xx series are low noise, constant frequency charge pump DC/DC converters and designed to increase efficiency in white LED application. The operating voltage range is 2.7V ~ VOUTinput with up to 100mA of output current. Low external parts counts(one flying capacitor and two small bypass capacitors at VIN?and VOUT) make the UTC?L5201-xx series ideally suited for small, battery-powered applications. A charge-pump architecture maintains constant switching frequency to zero load and reduces both output and input ripple. The UTC?L5201-xx series have thermal shutdown capability to escape the device damaged from a continuous short-circuit. With built-in soft-start circuitry to prevents excessive current flow at VIN during start-up. High switching frequency enables the use of small ceramic capacitors. A low-current shutdown feature disconnects the load from VIN and reduces quiescent current to

特性 Features

? Low Noise Constant Frequency Operation
? Output Current:
? 90mA@3.0V? 100mA@3.0V? 1MHz Switching Frequency
? 4.5V/5.0V Fixed Output Voltage
? VIN Range: 2.7V ~ VOUT
? Automatic Soft-Start.
? No Inductors
? Less than 1μA of Shutdown Current