MP8864 High-Efficiency, 4 A, 21 V, Synchronous 2 Step-Down Converter with I C Interface DESCRIPTION FEATURES The MP8864 is a high-frequency, synchronous, Wide 4.5 V to 21 V Operation Input Range rectified, step-down, switch-mode converter 50 m/23 m Low R Internal Power DS(ON) 2 with an I C control interface. It offers a very MOSFETs compact solution to achieve a 4 A continuous 1% VOUT Accuracy 2 output current with excellent load and line I C Programmable Reference Voltage regulation over a wide input supply range. The Range from 0.6 V to 1.87 V in 10 mV Steps MP8864 has synchronous-mode operation for with Slew-Rate Control higher efficiency over the output load range. 2 I C Selectable Switching Frequency. Default 600 kHz Switching Frequency The reference voltage level is controlled, 2 Programmable Output Voltage on-the-fly through a 3.4 Mbps I C serial 2 Power-Saving Mode, OTP, and OCP via I C interface. The voltage range can be adjusted from 0.6 V to 1.87 V in 10 mV steps. Also, the Power Good Indication 2 voltage slew rate, switching frequency, enable, 1-Bit I C Address Set Pin and power-saving mode are selectable through OCP in Hiccup Mode 2 the I C interface. External Soft-Start Available in a QFN 3mm x 3mm Package Current-mode operation provides fast transient response and eases loop stabilization. Full APPLICATIONS protection features include over-current SoC and Media Processors protection (OCP), over-voltage protection General Consumer (OVP), and thermal shutdown (TSD). Distributed Power Systems The MP8864 requires a minimal number of All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For readily available, standard external components MPS green status, please visit the MPS website under Quality Assurance. and is available in a 15-pin QFN15 MPS and The Future of Analog IC Technology are registered trademarks of Monolithic Power Systems, Inc. (3mm x 3mm) package. TYPICAL APPLICATION R8 10 C4 0.1 uF L1 4.5 V-21 V BST 1 uH VIN VIN 1.2 V/4 A VOUT SW VOUT C2 C5 R1 22 uF x 2 R9 47 uF 34 k 100 k FB R3 R2 EN EN/SYNC 33 k 34 k MP8864 VCC C1 SDA SDA R4 0.22 F SCL SCL 100 k ADD PG SS PG AGND PGND C7 22 nF MP8864 Rev. 1.02 www.MonolithicPower.com 1 1/18/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved. MP8864 SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number Package Top Marking MP8864GQ* QFN-15 (3mm x 3mm) See Below EVKT-8864 Evaluation Kit *For Tape & Reel, add suffix Z (e.g. MP8864GQZ) TOP MARKING APE: Product code of MP8864GQ Y: Year code LLL: Lot number EVALUATION KIT EVKT-8864 EVKT-8864 Kit contents: (Items below can be ordered separately). Part Number Item Quantity 1 EV8864-Q-00A MP8864GQ evaluation board 1 Includes one USB to I2C dongle, one USB cable, and one 2 EVKT-USBI2C-02 1 ribbon cable USB Flash drive that stores the GUI installation file and 3 Tdrive-8864 1 supplemental documents Order direct from MonolithicPower.com or our distributors. Input Power Supply Input GUI USB Cable Ribbon Cable USB to I2C Dongle EV8864-Q-00A Output Load Figure 1: EVKT-8864 Evaluation Kit Set-Up MP8864 Rev. 1.02 www.MonolithicPower.com 2 1/18/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved.