LP3205F

Preliminary Datasheet LP3205F 1.5MHZ,800mA,High Efficiency Synchronous PSM/PWM Step-Down DC/DC Convert General Description The LP3205F is a constant frequency, current mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency. The 2.5V to .5V input voltage range makes the LP3205F 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. Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. The internal synchronous switch 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 operation frequency of 1.5MHz. This along with small SOT-23-5 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。 Ordering Information LP3205F - □ □ □ □ □ Features ◆ High Efficiency: 93% 　 ◆ 1.5MHz Fixed-Frequency PWM Operation ◆ Adjustable Output From 0.6V to VIN 　 ◆ 1.2V, 1.5V, 1.8V, 2.5V, 3.0Vand 3.3V Fixed ◆ 800mA Output Current, 1.5A Peak Current ◆ No Schottky Diode Required ◆ 95% Duty Cycle Low Dropout Operation ◆ Available in SOT23-5/TSOT23-5 Package 　 ◆ Short Circuit and Thermal Protection 　 ◆ Low than 1µA Shutdown Current A...