MP3425 3A, 55V Boost Converter with Programmable Switching Frequency and UVLO The Future of Analog IC Technology DESCRIPTION FEATURES The MP3425 is a current mode step-up 3.5A, 90m, 55V Power MOSFET converter with a 3.5A, 90m internal switch to Uses Tiny Capacitors and Inductors provide a highly efficient regulator with fast Wide input range: 3.1V to 22V response. The MP3425 features a programmed Output Voltage as High as 55V frequency up to 2MHz allowing for easy filtering Programmable Fsw: 300kHz 2 MHz and low noise. An external compensation pin Programmable UVLO, Soft-Start, UVLO gives the user flexibility in setting loop Hysteresis dynamics, and operates with small, low-ESR Micropower shutdown <1 A ceramic output capacitors. Soft-start results in Thermal Shutdown 160 C small inrush current and can be programmed Available in 14-Pin 3x4mm QFN Package with an external capacitor. The MP3425 operates from an input voltage as low as 3.1V APPLICATIONS and can generate 48V at up to 350mA from a Telecom Power Supply 12V supply. Audio - Microphone and Tuner Bias The MP3425 includes under-voltage lockout, Automotive current limiting and thermal overload protection All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For to prevent damage in the event of an output MPS green status, please visit MPS website under Quality Assurance. overload. The MP3425 is available in a low MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. profile 14-pin 3x4mm QFN package with exposed pad. TYPICAL APPLICATION D1 50V, 3A VOUT VIN 0805 100V R1 U1 7 100k VDD C2 R2 33nF 2 383k EN MP3425 13 14 FB FSET 12 SS 1 COMP R3 10k R4 R5 C5 51k 150k R6 33nF 20k C7 3.3nF MP3425 Rev.1.1 www.MonolithicPower.com 1 4/29/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2016 MPS. All Rights Reserved. 8 PGND VIN 3 9 PGND 10 PGND 15 6 EP SW 5 SW 11 4 AGND SWMP3425- 3A, 55V BOOST CONVERTER WITH PROGRAMMABLE SWITCHING FREQUENCY AND UVLO ORDERING INFORMATION Part Number* Package Top Marking Free Air Temperature (T ) A MP3425DL QFN-14 (3mmx4mm) 3425 -40 C to +85 C * For Tape & Reel, add suffix Z (e.g. MP3425DLZ) For RoHS compliant packaging, add suffix LF (e.g. MP3425DLLFZ) PACKAGE REFERENCE TOP VIEW 1 14 COMP FSET 2 13 FB EN 3 12 SS VIN EXPOSED PAD 4 11 AGND SW 5 10 PGND SW 6 9 PGND SW 8 VDD 7 PGND QFN-14 (3mmx4mm) (1) Thermal Resistance JA JC ABSOLUTE MAXIMUM RATINGS QFN-14 (3mmx4mm) .............. 50 ...... 12 ... C/W SW .......................... -0.5V(-3V for 10ns) to +55V IN ................................................ -0.5V to +22V Notes: All Other Pins ............................... -0.3V to +6.5V 1) Exceeding these ratings may damage the device. (2) Continuous Power Dissipation (T = +25C) 2) The maximum allowable power dissipation is a function of the A maximum junction temperature T(MAX), the junction-to- J QFN14 ....................................................... 2.5W ambient thermal resistance , and the ambient temperature JA Junction Temperature ............................... 150 C T . The maximum allowable continuous power dissipation at A (MAX)=(T (MAX)- any ambient temperature is calculated by P D J Lead Temperature .................................... 260 C T )/ . Exceeding the maximum allowable power dissipation A JA Storage Temperature ............... -65C to +150 C will cause excessive die temperature, and the regulator will go (3) into thermal shutdown. Internal thermal shutdown circuitry Recommended Operating Conditions protects the device from permanent damage. Supply Voltage V ........................... 3.1V to 22V 3) The device is not guaranteed to function outside of its IN operating conditions. Output Voltage V ......................... 3.1V to 55V OUT Operating Junct. Temp (T ) ..... - 40 C to +125 C J MP3425 Rev.1.1 www.MonolithicPower.com 2 4/29/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2016 MPS. All Rights Reserved.