MP28259DD-LF-P

MP28259 High Efficiency, Fast Transient, 2A, 4.2V-20V Input Synchronous Step-down Converter in QFN12 (2x3mm) The Future of Analog IC Technology DESCRIPTION FEATURES • • • • The MP28259 is a fully-integrated synchronous, rectified, step-down switch mode converter with programmable frequency. It offers a very compact solution that can achieve a 2A continuous output current over a wide input supply range with excellent load and line regulation, and can operate at high efficiency over a wide output current load range. • • • • Constant-On-Time (COT) control mode provides fast transient response and eases loop stabilization. • Full protection features include SCP, OCP, OVP, UVP, and thermal shut down. • • Wide 4.2V to 20V Operating Input Range 2A Output Current Low RDS(ON) Internal Power MOSFETs Proprietary Switching Loss Reduction Technique Power-Good Indicator in QFN Package Soft Shutdown Programmable Switching Frequency OCP, SCP, OVP, UVP Protection and Thermal Shutdown Optional OCP Protection: Latch-Off Mode and Hiccup Mode Output Adjustable from 0.815V to 13V Available in a QFN12 (2mmx3mm) Package The MP28259 requires a minimal number of readily-available standard external components. APPLICATIONS The device is available in a space saving 2mmx3mm 12-pin QFN package. • • Networking Systems Distributed Power Systems All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION 9 IN VIN 4.2V - 20V R7 BST 3 C3 C1 L1 MP28259 8 C5 OFF ON EN SW FREQ 2, 10 VOUT 1.2V 4 VCC R4 5 6 FB C4 220pF R1 C2 7 EN PG R2 GND 1, 11, 12 MP28259 Rev. 1.34 www.MonolithicPower.com 4/27/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 1 MP28259 – 2A, 4.2V-20V INPUT, FAST TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* OCP Protection Package Top Marking MP28259DD Latch-off mode QFN12 (2x3mm) AAT MP28259DD-A Hiccup mode QFN12 (2x3mm) ACX * For Tape & Reel, add suffix –Z (e.g. MP28259DD–Z). For RoHS Compliant Packaging, add suffix –LF (e.g. MP28259DD–LF–Z) PACKAGE REFERENCE TOP VIEW GND 12 11 GND 10 SW GND 1 SW 2 BST 3 9 IN VCC 4 8 FREQ EN 5 7 FB SW 6 PG QFN12 (2x3mm) ABSOLUTE MAXIMUM RATINGS (1) Supply Voltage VIN .......................................22V VSW ...-0.3V(-4V