MP2488 200kHz, 55V Input, 2A High Power LED Driver The Future of Analog IC Technology DESCRIPTION FEATURES The MP2488 is a fixed frequency step-down Wide 4.5V to 55V Operating Input Range switching regulator to deliver a constant current 220m Internal Power MOSFET of up to 2A to high power LEDs. It integrates a Up to 200kHz Programmable Switching high-side, high voltage power MOSFET with a Frequency current limit of 3.2A. The wide 4.5V to 55V input 130 A Quiescent Current range accommodates a variety of step-down Ceramic Capacitor Stable applications, making it ideal for automotive, Internal Soft-Start industry and general lighting applications. Peak Up to 97.5% Efficiency current mode control and 200mV reference are 200mV reference voltage for high efficiency applied for fast loop response, easy Available in 3x3mm 10-Pin QFN and SOIC8 compensation and accurate LED current with Exposed Pad Packages regulation. The switching frequency is programmable with an external resistor up to APPLICATIONS 200kHz, which can prevent EMI High Power LED Driver (Electromagnetic Interference) noise problems. Automotive, and General Lighting The thermal shut down provides reliable, fault Constant Source tolerant operations. A 12A quiescent current in shutdown mode allows its use in battery- For MPS green status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Registered Trademarks of powered applications. Monolithic Power Systems, Inc. The MP2488 is available in small 3x3mm 10-pin QFN and SOIC8 with exposed pad packages. TYPICAL APPLICATION Efficiency vs. Input Voltage C COM2 10 WLED 330mA 100 R C COM1 COM COMP VIN V IN 98 C 8V to 55V IN MP2488 CONTROL EN BST 96 R FREQ C L1 BST FREQ LED+ SW 94 C FREQ D1 C OUT LED- FB GND 92 RFB 90 30 35 40 45 50 55 60 INPUT VOLTAGE(V) MP2488 Rev. 1.0 www.MonolithicPower.com 1 6/20/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. EFFICIENCY(%)MP2488 2A, 200kHz, 55V HIGH-POWER LEDS DRIVER ORDERING INFORMATION Part Number Package Top Marking Free Air Temperature (T ) A QFN10(3x3mm) MP2488DQ* 7G 40 C to +85C SOIC8E MP2488DN** MP2488DN 40 C to +85C *For Tape & Reel, add suffix Z (eg. MP2488DQZ) For RoHS compliant packaging, add suffix LF (eg. MP2488DQLFZ) **For Tape & Reel, add suffix Z (eg. MP2488 DNZ) For RoHS compliant packaging, add suffix LF (eg. MP2488 DNLFZ) PACKAGE REFERENCE TOP VIEW TOP VIEW SW 1 10 BST SW 1 8 BST SW 2 9 VIN EN 2 7 VIN EN 3 8 VIN COMP 3 6 FREQ COMP 4 7 FREQ FB 4 5 GND FB 5 6 GND EXPOSED PAD EXPOSED PAD SOIC8E QFN10(3x3mm) (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage (V ) ..................... 0.3V to +60V IN QFN10(3x3mm) ...................... 50 ...... 12 ... C/W Switch Voltage (V ) ............ 0.5V to V + 0.5V SW IN SOIC8 (Exposed Pad) ............ 50 ...... 10 ... C/W BST to SW ..................................... 0.3V to +5V All Other Pins ................................. 0.3V to +5V Notes: 1) Exceeding these ratings may damage the device. Junction Temperature ............................... 150 C 2) The maximum allowable power dissipation is a function of the Lead Temperature .................................... 260 C maximum junction temperature T(MAX), the junction-to- J Storage Temperature .............. 65C to +150C ambient thermal resistance , and the ambient temperature JA T . The maximum allowable continuous power dissipation at A Continuous Power Dissipation any ambient temperature is calculated by P (MAX)=(T (MAX)- D J (2) T )/ . Exceeding the maximum allowable power dissipation (T =+25 C ) A JA A will cause excessive die temperature, and the regulator will go QFN10(3x3mm) ......................................... 2.5W into thermal shutdown. Internal thermal shutdown circuitry SOIC8 (Exposed Pad) ............................... 2.5W protects the device from permanent damage. 3) The device is not guaranteed to function outside of its (3) operating conditions. Recommended Operating Conditions 4) Measured on JESD51-7 4-layer board. Supply Voltage V ........................... 4.5V to 55V IN Maximum Junction Temp. (T ) ............... +125C J MP2488 Rev. 1.0 www.MonolithicPower.com 2 6/20/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved.