MPQ4568 Industrial Grade, 60V, 100mA Synchronous Step-Down Converter FEATURES DESCRIPTION 20A Quiescent Current The MPQ4568 is a high-frequency, step-down, Wide 4.5V to 45V Operating Range with 50V switching regulator with integrated high- Input OVP side/low-side, high-voltage power MOSFETs. It 60V Integrated MOSFETs with 0.7 and provides a highly efficient output of up to 2.25 Ron 100mA. Programmable Switching Frequency 60V rated MOSFETs and 4.5V to 45V operation Stable with Ceramic Output Capacitors range accommodates a variety of step-down Low Output Ripple applications in automotive input environment. A Programmable Soft-Start 5A shutdown mode quiescent current allows Adjustable Input UVLO Hysteresis use in battery-powered applications. Precision Peak Current Limit without It allows for high power conversion efficiency Current-Sensing Resistor over a wide load range by scaling down the Programmable Peak Current Limit switching frequency under light-load condition >90% Efficiency at 10V VIN to 5V V /2mA OUT to reduce the switching and gate driver losses. 1.0V Feedback Reference Voltage Low Shutdown Mode Current: <5A The switching frequency during start-up and 3mmx3mm QFN10 Package short circuit also can be scaled down to helps prevent inductor current runaway. Thermal APPLICATIONS shutdown provides reliable, fault-tolerant operation. 4mA to 20mA Current Loops Automotive Systems The MPQ4568 is available in a 3mmx3mm Industrial Power Systems QFN10 package. Distributed Power Systems Battery Powered Systems 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 L1 C2 U1 100uH 0.1uF 5V/100mA 10 2 VIN SW VOUT IN C3 C1 R3 10uF 22uF 2M MPQ4568 9 4 EN EN BIAS 8 R1 ENHY 1.2M 6 ILIM FB 5 R4 7 SS 100k R2 300k MPQ4568 Rev. 1.0 www.MonolithicPower.com 1 8/20/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. 3 1 GND BSTMPQ456860V, 100mA, SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking MPQ4568GQ QFN10 (3x3mm) ACVY * For Tape & Reel, add suffix Z (e.g. MPQ4568GQZ). PACKAGE REFERENCE (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage (V ) ..................... -0.3V to +60V QFN10 (3x3mm) ..................... 50 ...... 12 ... C/W IN Switch Voltage (V ).-0.3V to (V + 1V) SW IN Notes: BST to SW ..................................... -0.3 to +6.0V 1) Exceeding these ratings may damage the device. All Other Pins .............................. -0.3V to +6.0V 2) The maximum allowable power dissipation is a function of the (2) maximum junction temperature T (MAX), the junction-to- J Continuous Power Dissipation (T = +25C) A ambient thermal resistance JA, and the ambient temperature .......2.5W T . The maximum allowable continuous power dissipation at A any ambient temperature is calculated by P (MAX) = (T D J Junction Temperature .............................. 150C (MAX)-T )/ . Exceeding the maximum allowable power A JA Lead Temperature ................................... 260C dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal Storage Temperature ............... -65C to +150C shutdown circuitry protects the device from permanent (3) damage. Recommended Operating Conditions 3) The device is not guaranteed to function outside of its operating conditions. Supply Voltage V .......................... 4.5V to 45V IN 4) Measured on JESD51-7, 4-layer PCB. Operating Junction Temp. (T ). -40C to +125C J MPQ4568 Rev. 1.0 www.MonolithicPower.com 2 8/20/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved.