MP2120 2.5A, 5.5V Synchronous Step-Down Switching Regulator The Future of Analog IC Technology DESCRIPTION FEATURES 2.5A Output Current The MP2120 is an internally compensated Input Operation Range: 2.7V to 5.5V 1.5MHz fixed frequency PWM synchronous step-down regulator. MP2120 operates from a All Ceramic Capacitor Design 2.7V to 5.5V input and generates an output Up to 95% Efficiency voltage as low as 0.8V. 1.5MHz Fixed Switching Frequency Adjustable Output from 0.8V to 0.9xV IN The MP2120 integrates an 80m high-side Internal Soft-Start switch and a 60m synchronous rectifier for Frequency Synchronization Input high efficiency without an external Schottky Power Good Output diode. With peak current mode control and Cycle-by-Cycle Current Limiting internal compensation, the MP2120 based Hiccup Short Circuit Protection solution delivers a very compact footprint with a minimum component count. Thermal Shutdown 3mm x 3mm 10-lead QFN Package The MP2120 is available in a small 3mm x 3mm 10-lead QFN package. APPLICATIONS P/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 Efficiency vs. Output Current V IN 95 C3 10nF IN BS 90 1.2 POK POK SW V OUT 5V to 1.8V 5V to 3.3V 1.8V / 2.5A 85 MP2120 5V to 2.5V 80 OFF ON EN/SYNC FB GND 75 70 0 0.5 1 1.5 2 2.5 OUTPUT CURRENT (A) MP2120 Rev. 0.92 www.MonolithicPower.com 1 9/7/2011 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. EFFICIENCY (%)MP2120 2.5A, 5.5V SYNCHRONOUS STEP-DOWN CONVERTER (1) PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS IN to GND ........... -0.3V to +6.0V (+6.6V for 2ns) SW to GND ........................... -0.3V to V + 0.3V IN TOP VIEW SW to GND .......... 2.5V to V + 2.5V for <50nS IN FB, EN/SYNC, POK to GND........... -0.3V to +6.5V FB 1 10 EN/SYNC BS to SW ..................................... -0.3V to +6.5V Junction Temperature ............................... 150C GND 2 9 GND Lead Temperature .................................... 260C SW 3 8 SW Storage Temperature ...............-65C to +150C IN 4 7 IN (2) Recommended Operating Conditions BS 5 6 POK Supply Voltage V .......................... 2.7V to 5.5V IN EXPOSED PAD Output Voltage V ................. 0.8V to 0.9 x V OUT IN ON BACKSIDE Operating Temperature ..............-40C to +85C (3) Thermal Resistance JA JC QFN10 (3mm x 3mm) ............. 50 ...... 12 ... C/W Part Number* Package Temperature QFN10 Notes: MP2120DQ -40 C to +85C (3mm x 3mm) 1) Exceeding these ratings may damage the device. 2) The device is not guaranteed to function outside of its For Tape & Reel, add suffix Z (e.g. MP2120DQZ) * operating conditions. For RoHS Compliant Packaging, add suffix LF 3) Measured on approximately 1 square of 1 oz copper. (e.g. MP2120DQLFZ) (4) ELECTRICAL CHARACTERISTICS V = V = 3.6V, T = +25 C, unless otherwise noted. IN EN A Parameters Condition Min Typ Max Units V = V EN IN Supply Current 750 A V = 0.85V FB Shutdown Current V = 0V, V = 5.5V 1 A EN IN IN Undervoltage Lockout Rising Edge 2.59 2.69 V Threshold IN Undervoltage Lockout 210 mV Hysteresis Regulated FB Voltage T = +25C 0.776 0.800 0.824 V A FB Input Current V = 0.85V 50 nA FB EN High Threshold 40C T +85C 1.6 V A EN Low Threshold 40C T +85C 0.4 V A Internal Soft-Start Time 120 s High-Side Switch On-Resistance I = 300mA 80 m SW Low-Side Switch On-Resistance I = 300mA 60 m SW V = 0V V = 5.5V EN IN SW Leakage Current -10 10 A V = 0V or 5.5V SW BS Under Voltage Lockout 1.8 V Threshold MP2120 Rev. 0.92 www.MonolithicPower.com 2 9/7/2011 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved.