MXT7502①②③④ INTRODUCTION: FEATURES: The MXT7502 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. z High efficiency : Up to 96% z Output Current: 600mA (Typ.) z 1.5MHz Constant Switching Frequency z No Schottky Diode Required z Input Voltage: 1.8V to 5.5V z 0.6V Reference Allows Low Output Voltage z Low Dropout: 100% duty Cycle z Quiescent Current: 270μA z Shutdown Current: <1μA z Current Mode Operation for Excellent Line and Load Transient Response z Built-in Thermal Protection z Package: SOT-23-5 APPLICATIONS： z Cellular and Smart Phones z Personal Information Appliances z Wireless and DSL Modems z Digital Still and Video Cameras z Microprocessors Core Supplies z Portable consumer equipments PIN CONFIGURATION: ORDER INFORMATION: DESIGNATORSYMBOL DESCRIPTION ① A Standard ②③ IntegerOutput Voltage e.g.1.8V=②:1, ③:8Adj=②:, ③: ④ M/MR Package： SOT-23-51.5MHz 600mA Synchronous Step-Down Converter MXT7502 Series 1 Tabel1. Pin Description PIN NUMBER PIN NAME FUNCTION M MR 1 3 CE Chip Enable Pin 2 2 VSS Ground 3 5 SW External Inductor Connection Pin 4 1 VIN Power Input 5 4 VOUT/FB Output Pin/Feedback(ADJ Version) BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS...
