MP1593DN-LF

MP28127 1.25A, 5.5V Synchronous Step-Down Switching Regulator The Future of Analog IC Technology DESCRIPTION FEATURES The MP28127 is an internally compensated 1.5MHz fixed frequency PWM synchronous step-down regulator. MP28127 operates from a 2.7V to 5.5V input and generates an output voltage as low as 0.8V. • • • • • • • • • • • • The MP28127 integrates a high-side switch and a synchronous rectifier for high efficiency without an external Schottky diode. With peak current mode control and internal compensation, the MP28127 based solution delivers a very compact footprint with a minimum component count. The MP28127 is available in a small 3mm x 3mm 10-lead QFN package. 1.25A Output Current Input Operation Range: 2.7V to 5.5V All Ceramic Capacitor Design 1.5MHz Fixed Switching Frequency Adjustable Output from 0.8V to 0.9xVIN Internal Soft-Start Frequency Synchronization Input Power Good Output Thermal Shutdown Cycle-by-Cycle Current Limiting Hiccup Short Circuit Protection 3mm x 3mm 10-lead QFN Package APPLICATIONS • • • • µP/ASIC/DSP/FPGA Core and I/O Supplies Printers and LCD TVs Network and Telecom Equipment Point of Load Regulators “MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION VIN 2.7V to 5.5V 47 POK IN C3 100nF BS POK EN/SYNC GND 400 FB 310 MP28127 Rev. 0.9 6/7/2010 VOUT 1.8V / 1.25A MP28127 OFF ON 1.2 SW 47 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 1 MP28127 – 1.25A, 5.5V SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR ABSOLUTE MAXIMUM RATINGS (1) PACKAGE REFERENCE TOP VIEW FB 1 10 EN/SYNC GND 2 9 GND SW 3 8 SW IN 4 7 IN BS 5 6 POK IN to GND ...................................... –0.3V to +6V SW to GND .......................... –0.3V to VIN + 0.3V SW to GND ............ -2.5V to VIN+2.5V for