MP2145 5.5V, 6A, 1.2MHz, High-Efficiency, 40A I Q Constant On-Time Synchronous, Step-Down Switcher The Future of Analog IC Technology DESCRIPTION FEATURES The MP2145 is a monolithic, step-down, switch- Up to 6A Output Current mode converter with internal power MOSFETs. It Wide 2.8V-to-5.5V Operating Input Range can achieve up to 6A continuous output current 20m and 12m Internal Power MOSFETs from a 2.8V-to-5.5V input voltage with excellent 40A Quiescent Current load and line regulation. The output voltage can 1.2MHz Fixed Switching Frequency be regulated to as low as 0.6V. 100% Duty Cycle in Dropout 1% Feedback Accuracy Constant-on-time control provides a fast transient response and eases loop stabilization. Fault External Mode Control condition protections include cycle-by-cycle External VCON Control current limiting and thermal shutdown. Adjustable Output from 0.6V 1.5ms Internal SS Time with Pre-Bias Startup The MP2145 is available in a small QFN23mm Cycle-by-Cycle Over Current Protection package and requires only a minimal number of Short Circuit Protection with Hiccup Mode readily-available, standard, external components. Stable with Low-ESR Output Ceramic The MP2145 is ideal for a wide range of Capacitors applications, including storage (SSD, HDD), high- Thermal Shutdown performance DSPs, FPGAs, and distributed Available in a 2mm3mm QFN Package power systems. Output Discharge Function APPLICATIONS Storage (SSD, HDD) Portable Instruments Battery-Powered Devices All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION L1 VIN VOUT 2.8V to 5.5V 0.47uH 1.2V/6A SW VIN C2 C3 22uF 22uF C1 OUT 22uF R1 MP2145 200k EN EN FB R2 PG PG 200k Ramp Ramp MODE / MODE/ VCON VCON GND MP2145 Rev. 1.12 www.MonolithicPower.com 1 11/29/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved. MP2145 5.5V, 6A, 1.2MHz, COT, BUCK SWITCHER ORDERING INFORMATION Part Number* Package Top Marking MP2145GD QFN-12 (2mmx3mm) AFV * For Tape & Reel, add suffix Z (e.g. MP2145GDZ) PACKAGE REFERENCE TOP VIEW QFN-12 (2mm3mm) (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage V .......................................... 6V QFN-12 (2mmx3mm)..70 15 C/W IN V ....................................................................... SW Notes: ..0.3V (-3V for <10ns) to 6V (8V for <10ns) 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the All Other Pins ................................ 0.3V to +6 V maximum junction temperature TJ (MAX), the junction-to- Junction Temperature ............................... 150C ambient thermal resistance JA, and the ambient temperature Lead Temperature .................................... 260C T . The maximum allowable continuous power dissipation at A any ambient temperature is calculated by P (MAX) = (T (2) 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 ................................................................... 1.78W regulator will go into thermal shutdown. Internal thermal (3) shutdown circuitry protects the device from permanent Recommended Operating Conditions damage. Supply Voltage V .......................... 2.8V to 5.5V IN 3) The device is not guaranteed to function outside of its operating conditions. Output Voltage V ........................ 0.6V to 5.5V OUT 4) Measured on JESD51-7, 4-layer PCB. Operating Junction Temp....... -40C to +125C MP2145 Rev. 1.12 www.MonolithicPower.com 2 11/29/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved.