MP2459 0.5A, 55V, 480kHz Step-Down Converter in a TSOT23-6 The Future of Analog IC Technology DESCRIPTION FEATURES The MP2459 is a monolithic, step-down, switch- 0.5A Peak Output Current mode converter with a built-in power MOSFET. 1 Internal Power MOSFET It achieves a 0.5A peak-output current over a Stable with Low-ESR Ceramic Output wide input supply range with excellent load and Capacitors line regulation. Current-mode operation Up to 90% Efficiency provides a fast transient response and eases 0.1 A Shutdown Mode loop stabilization. Fault condition protections Fixed 480kHz Frequency include cycle-by-cycle current limiting and thermal Thermal Shutdown shutdown. Cycle-by-Cycle Over-Current Protection The MP2459 requires a minimal number of Wide 4.5V-to-55V Operating Input Range readily-available external components. The Output Adjustable from 0.81V to 0.95*V IN MP2459 is available in a TSOT23-6 package. Available in a TSOT23-6 Package APPLICATIONS Power Meters Distributed Power Systems Battery Chargers Pre-Regulator for Linear Regulators WLED Drivers All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. MPS and The Future of Analog IC Technology are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION 100 BST VIN IN 90 MP2459 L1 80 GND U1 SW VOUT 70 D1 60 EN EN FB GND 50 40 30 0.0 0.1 0.2 0.3 0.4 0.5 0.6 MP2459 Rev. 1.1 www.MonolithicPower.com 1 5/21/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. MP2459 0.5A, 55V, 480kHz, STEP-DOWN CONVERTER IN A TSOT23-6 ORDERING INFORMATION Part Number* Package Top Marking TSOT23-6 MP2459GJ AEQ * For Tape & Reel, add suffix Z (eg. M2459GJZ) PACKAGE REFERENCE TOP VIEW BST 1 6 SW GND 2 5 IN FB 3 4 EN (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage V ......................... 0.3V to 60V IN TSOT23-6 ............................... 220 ... 110 C/W V ......................................... 0.3V to V +0.3V SW IN Notes: V ......................................................... V + 6V BS SW 1) Exceeding these ratings may damage the device. All Other Pins ................................. 0.3V to +6V 2) The maximum allowable power dissipation is a function of the (2) Continuous Power Dissipation (T = +25C) A maximum junction temperature TJ(MAX), the junction-to- ambient thermal resistance JA, and the ambient temperature TSOT23-6 ............................................... 0.568W TA. The maximum allowable continuous power dissipation at Junction Temperature ............................... 150C any ambient temperature is calculated by PD(MAX)=(TJ(MAX)- Lead Temperature .................................... 260C TA)/ JA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go Storage Temperature ............... 65C to +150C into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. (3) Recommended Operating Conditions 3) The device function is not guaranteed outside of the recommended operating conditions. Supply Voltage V ........................... 4.5V to 55V IN 4) Measured on JESD51-7, 4-layer PCB.. Output Voltage V ................ 0.81V to 0.95V OUT IN Operating Junction Temp...... 40C to +125C MP2459 Rev. 1.1 www.MonolithicPower.com 2 5/21/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved.