MP3431 21A, High-Efficiency, Fully Integrated, Synchronous, Boost Converter with Programmable Input Current Limit DESCRIPTION FEATURES The MP3431 is a 600kHz, fixed-frequency, wide 2.7V to 13V Start-Up Voltage input range, highly integrated, boost converter. 0.8V to 13V Operation Voltage The MP3431 starts from an input voltage as low Up to 16V Output Voltage as 2.7V and supports up to 30W of load power Supports 30W Average Power Load and from a 1-cell battery with integrated low R DS(ON) 40W Peak Power Load from 3.3V power MOSFETs. Programmable Input Current Limit 21.5A Internal Switch Current Limit The MP3431 adopts constant-off-time (COT) Integrated 6.5m and 10m Power control topology, which provides fast transient MOSFET response. MODE supports the selection of pulse-skip mode (PSM), forced continuous >95% Efficiency for 3.6V VIN to 9V/3A conduction mode (FCCM), and ultrasonic mode Selectable PSM, >23kHz USM, and FCCM (USM) in light-load condition. The programmable in Light-Load Condition input current limit provides accurate overload 600kHz Fixed Switching Frequency protection. The low-side MOSFET limits the Adaptive COT for Fast Transient Response cycle-by-cycle inductor peak current, and the External Soft Start and Compensation Pins high-side MOSFET eliminates the need for an Programmable UVLO and Hysteresis external Schottky diode. 150C Over-Temperature Protection (OTP) Available in a QFN-13 (3mmx4mm) Full protection features include programmable Package input under-voltage lockout (UVLO) and over- temperature protection (OTP). APPLICATIONS The MP3431 is available in a QFN-13 Notebooks (3mmx4mm) package. Bluetooth Speakers Portable POS Systems Quick Charger Power Banks 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 Efficiency vs. Load Current L1 1.5 H V IN C5 PSM 0.1F 100 95 SW BST V OUT 9V 90 VIN VOUT C1 22 FX3 85 On / off EN R1 80 MODE 750k High/ Middle/ Low C2 FB MP3431 75 22 Fx3 R2 COMP Vin=3V 93.1k 70 VDD R4 C6 65 Vin=3.3V ILIM C3 SS 6.8nF 60 Vin=3.6V 4.7 F 1k C4 R3 Vin=4.2V 55 22nF AGND PGND 6.8k C7 R5 50 4.7nF 22k 1 10 100 1000 Load Current(mA) MP3431 Rev. 1.0 www.MonolithicPower.com 1 6/8/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2017 MPS. All Rights Reserved. Efficiency(%)MP3431 21A, HIGH-EFFICIENCY, SYNC, BOOST CONVERTER W/ PROG CURRENT LIMIT ORDERING INFORMATION Part Number* Package Top Marking MP3431GL QFN-13 (3mmx4mm) See Below *For Tape & Reel, add suffix Z (e.g. MP3431GLZ) TOP MARKING MP: MPS prefix Y: Year code W: Week code 3431: First four digits of the part number LLL: Lot number PACKAGE REFERENCE TOP VIEW BST VIN EN MODE ILIM 13 12 11 10 9 8 VOUT SW 1 7 PGND 2 3 4 5 6 VDD SS COMP FB AGND QFN-13 (3mmx4mm) MP3431 Rev. 1.0 www.MonolithicPower.com 2 6/8/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2017 MPS. All Rights Reserved.