器件名称: LP78081
功能描述: 600mA High Efficiency Synchronous Buck with 350mA LDO
文件大小: 385.49KB 共8页
简 介:Preliminary Datasheet
LP78081
600mA High Efficiency Synchronous Buck with 350mA LDO
General Description
The LP78081 are PMU, and contain a 600mA Buck DC/DC and a 350mA Linear Regulator, Buck DC/DC is a constant frequency, current mode, PWM step-down converter.The device integrates a main switch and a synchronous rectifier for high efficiency. The 2.7V to 6.5V input voltage range makes the LP78081 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and handy-terminals. PWM mode. Internal synchronous rectifier with internal synchronous switch low RDS(ON) dramatically reduces conduction loss at The increases efficiency while eliminate the need for an external Schottky diode.The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operation frequency of 1.5MHz. This along with small SOT-23-6 package provide small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection。
Features
600mA Buck High Efficiency: 96%
1.5MHz Fixed-Frequency PWM Operation Adjustable Output From 0.6V to VIN 350mA LDO: 3.0V and 3.3V Fixed output 100% Duty Cycle Low Dropout Operation Available in SOT23-6 Package Low than 1A Shutdown Current
Applications
Portable Media Players/MP3 players Cellular and Smart mobile phone PDA DSC Wireless Card
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