LR8506

LR8506 1.5MHz 600mA Synchronous Step-Down Converter „ INTRODUCTION The LR8506 is a 1.5MHz constant frequency, slope compensated current mode PWM synchronous step-down converter. High switching frequency allows the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. It is ideal for powering portable equipment which runs from a single cell Lithium-Ion battery. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Low output voltages are easily supported with the 0.6V feedback reference voltage. LESHAN RADIO COMPANY, LTD. „ FEATURE ● High efficiency : Up to 96% ● Output Current: 600mA（Typ） ●1.5MHz Constant Switching Frequency ● No Schottky Diode Required ● Input Voltage: 2.5V to 5.5V ● Output Voltage:1.2V,1.5V,1.8V & Adjustable ● Low Dropout: 100% duty Cycle ● Low Quiescent Current: 300μA ● Shutdown Current: <1μA ● Current Mode Operation for Excellent Line and Load Transient Response ● Built-in Thermal Protection ● Short Circuit Protection ● Package: SOT23-5 „ APPLICATION ● Cellular and Smart Phones ● Personal Information Appliances ● Wireless and DSL Modems ● Portable Instruments ● Digital Still and Video Cameras ● Microprocessors Core Supplies „ BLOCK DIAGRAM „ ORDER INFORMATION LR8506 1/10 „ PIN CONFIGURATION LESHAN RADIO COMPANY, LTD. „ ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage CE,SW,FB/VOUT Voltage Peak SW S...