MP2227 24V, 3A, 1.3MHz Synchronous Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES 3A Output Current The MP2227 is an internally compensated Input Supply Range: 3V to 24V 1.3MHz fixed frequency PWM synchronous step-down regulator. MP2227 operates from a 160m high-side, 80m low-side Internal Power MOSFET Switches 3V to 24V input and generates an adjustable output voltage from 0.8V to 0.9xV at up to 3A All Ceramic Output Capacitor Design IN load current. Up to 95% Efficiency 1.3MHz Fixed Switching Frequency The MP2227 integrates a 160m high-side Adjustable Output from 0.8V to 0.9xV IN switch and an 80m synchronous rectifier for Internal LDO for V supply CC high efficiency without an external Schottky 1MHz to 2MHz Frequency Synchronization diode. With peak current mode control and POK internal compensation, it is stable with an Thermal Shutdown output ceramic capacitor and a small inductor. Fault protection includes hiccup short-circuit Cycle-by-Cycle Current Limiting protection, cycle-by-cycle current limiting and Hiccup Short Circuit Protection thermal shutdown. Other features include 10-lead, 3mm x 3mm QFN Package frequency synchronization and soft-start. APPLICATIONS The MP2227 is available in a small 3mm x 3mm P/ASIC/DSP/FPGA Core and I/O Supplies 10-lead QFN package. Printers and LCD TVs Network and Telecom Equipment Point of Load Regulators For MPS green status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION Efficiency V =12V, V =5V IN OUT 100 90 80 70 60 50 40 30 20 10 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 LOAD CURRENT ( A ) MP2227 Rev. 1.1 www.MonolithicPower.com 1 11/21/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. EFFICIENCY (%)MP2227 24V, 3A, 1.3MHz SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking Free Air Temperature (T ) A QFN10(3mm x 3mm) MP2227DQ 7U -40 C to +85 C * For Tape & Reel, add suffix Z (e.g. MP2227DQZ). For RoHS Compliant packaging, add suffix LF (e.g. MP2227DQLFZ) PACKAGE REFERENCE TOP VIEW FB 1 10 EN/SYNC POK 2 9 VCC VIN 3 8 BST GND 4 7 SW GND 5 6 SW EXPOSED PAD ON BACKSIDE (4) (1) Thermal Resistance JA JC ABSOLUTE MAXIMUM RATINGS QFN10 (3mm x 3mm) .............50 ...... 12... C/W VIN to GND...................................-0.3V to +28V SW to GND ...........................-0.3V to V + 0.3V IN Notes: .............................-2.5V to V + 2.5V for < 50ns 1) Exceeding these ratings may damage the device. IN 2) The maximum allowable power dissipation is a function of the FB, EN/SYNC, VCC to GND...........-0.3V to +6.5V maximum junction temperature T (MAX), the junction-to- J POK, SYNC OUT to GND .............-0.3V to +6.5V ambient thermal resistance , and the ambient temperature JA T . The maximum allowable continuous power dissipation at BS to SW .....................................-0.3V to +6.5V A (2) any ambient temperature is calculated by P (MAX) = (T D J Continuous Power Dissipation (T = +25C) A (MAX)-T )/ . Exceeding the maximum allowable power A JA dissipation will cause excessive die temperature, and the ....2.5W regulator will go into thermal shutdown. Internal thermal Junction Temperature...............................150C shutdown circuitry protects the device from permanent Lead Temperature ....................................260C damage. 3) The device is not guaranteed to function outside of its Storage Temperature............... -65C to +150C operating conditions. (3) 4) Measured on JESD51-7, 4-layer PCB. Recommended Operating Conditions Supply Voltage V ..............................3V to 24V IN Output Voltage V ..................0.8V to 0.9 x V OUT IN Max Operating Junct. Temp (T ).............+125C J MP2227 Rev. 1.1 www.MonolithicPower.com 2 11/21/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved.