LP3202-18b5f General Description
The LP3202 -18B5F is a constant frequency, current mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency. The 2.1V to 5.5V input voltage range makes the LP3202 -18B5F 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 fixed 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.

LP3202-18b5f 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, 2.8V and 3.3V Fixed
‹ 650mA Output Current, 1.1A Peak Current
‹ No Schottky Diode Required
‹ 100% Duty Cycle Low Dropout Operation
‹ Available in SOT23-5 Package
‹ Short Circuit and Thermal Protection
‹ Over Voltage Protection
‹ Low than 1µA Shutdown Current

LP3202-18b5f Applications
— Portable Media Players/MP3 players
— Cellular and Smart mobile phone
— PDA
— DSC
— Wireless Card