MP3421GG-Z

MP3421 The Future of Analog IC Technology 5.5A, 600kHz High-Efficiency, Synchronous Step-Up Converter with True Output Disconnect in a 2mmx2mm QFN Package DESCRIPTION FEATURES The MP3421 is a high-efficiency, synchronous, current–mode, step-up converter with true output disconnect. • • • • • • • • • • • • • The MP3421 starts up from low input voltage (as low as 1.9V) while providing in-rush current limiting and output short-circuit protection. The integrated, P-channel synchronous rectifier improves efficiency and eliminates the need for an external Schottky diode; the P-channel disconnects the output load from the input during shutdown. The MP3421 has 600kHz switching frequency, which accommodates small external components. In addition, its internal compensation and soft-start functions minimize external component count. The MP3421 provides a compact solution for a 5V output, 2.1A load requirement, using a supply voltage as low as 2.8V. The MP3421 is available in a 14-pin QFN 2mmx2mm package. Support 5V/2.1A Output at 2.8V Input Up to 98% Efficiency 1.9V to 5.5V Input Range 2.5V to 5.5V Output Range Internal Synchronous Rectifier 600kHz Fixed-Switching Frequency >5.5A Switch-Current Limit Capability 43uA Quiescent Current High-Efficiency over Full-Load Range Internal Soft-start and Compensation Output-Load Disconnect from Input OCP, SCP, OVP and OTP Protection Small 2x2mm QFN14 Package APPLICATIONS • • • • • Battery-Powered Products Power Banks, Juice Packs, Battery Back-up Units USB Power Supply Consumer Electronic Accessories Tablets 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 Efficiency vs. Load Current 100 VOUT=5V VIN=4.2V 98 96 94 VIN=3.3V VIN=2.8V 92 90 88 86 84 0 0.5 1 1.5 2 2.5 LOAD CURRENT (A) MP3421 Rev. 1.0 11/13/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 1 MP3421—5.5A, 600KHZ HIGH EFFICIENCY, SYNCHRONOUS, STEP-UP CONVERTER WITH OUTPUT DISCONNECT IN 2X2MM QFN PACKAGE ORDERING INFORMATION Part Number* MP3421GG Package QFN-14 (2mmX2mm) Top Marking See Below * For Tape & Reel, add suffix –Z (e.g. MP3421GG–Z) TOP MARKING DK: product code of MP3421GG; Y: year code; LLL: lot number; PACKAGE REFERENCE TOP VIEW MP3421 Rev. 1.0 11/13/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 2 MP3421—5.5A, 600KHZ HIGH EFFICIENCY, SYNCHRONOUS, STEP-UP CONVERTER WITH OUTPUT DISCONNECT IN 2X2MM QFN PACKAGE ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance SW .. ......................-0.3V to +6.5V (9V for VOUT 60 60 VIN