MP1517 3A, 25V, 1.1MHz Step-Up Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP1517 is a 3A, fixed frequency step-up 4A Peak Current Limit converter ideal for medium-to-high current Low 700mV Feedback Threshold step-up, flyback and SEPIC applications. The Internal 150m Power Switch high 1.1MHz switching frequency allows for Input Range of 2.6V to 25V smaller external components producing a Up to 95% Efficiency compact solution for size constrained cameras, Zero Current Shutdown Mode PDAs and cell phones. The low 0.7V feedback Under Voltage Lockout Protection voltage offers higher efficiency in white LED Open Load Protection driver applications including cell phone camera Soft-Start Operation flash. The MP1517 regulates the output voltage Thermal Shutdown up to 25V with efficiencies as high as 95%. Tiny 4mm x 4mm 16-Pin QFN Package Soft-start, cycle-by-cycle current limiting, and input under voltage lockout prevent APPLICATIONS overstressing or damage to sensitive external Boost and SEPIC Regulators circuitry at startup and output short-circuit Handheld Computers conditions. Current-mode regulation and Cell Phone Camera Flash, PDAs external compensation components allow the Digital Still and Video Cameras MP1517 control loop to be optimized over a wide variety of input voltage, output voltage, MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. and load current conditions. The MP1517 is available in the thermally enhanced QFN16 (4mm x 4mm) package. EVALUATION BOARD REFERENCE Board Number Dimensions EV0043 2.5X x 2.0Y x 0.4Z TYPICAL APPLICATION Efficiency vs V IN 5V Load Current 100 8 D1 95 IN MBR320 V = 12V OUT 90 4 9, 10 V OUT SW OFF ON EN 12V 85 15 80 SS MP1517 75 3 16 C4 BP FB 70 10nF V = 18V 7 65 OUT 1 C5 OLS COMP 10nF 60 SGND PGND C6 V = 5V 55 5, 13 11, 12 IN OPTIONAL C3 50 10nF 1 10 100 1000 LOAD CURRENT (mA) MP1517 TAC S01 MP1517-EC01 MP1517 Rev. 1.4 www.MonolithicPower.com 1 9/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2007 MPS. All Rights Reserved. EFFICIENCY (%)MP1517 3A, 25V, 1.1MHz STEP-UP CONVERTER (1) PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS Input Supply Voltage V ..............0.3V to +27V IN TOP VIEW SW Pin Voltage V ....................0.3V to +27V SW PIN 1 FB SS NC SGND EXPOSED PAD Voltage at All Other IDENTIFICATION CONNECT TO PIN 13 16 15 14 13 Pins except OLS.................................0.3V to +6V COMP 1 12 PGND Storage Temperature ..............65 C to +150 C NC 2 11 PGND Junction Temperature.............................+150C (2) BP 3 10 SW Recommended Operating Conditions IN Input Supply Voltage V ............. 2.6V to 25V IN EN 4 9 SW Output Voltage................................. 3.3V to 25V 5 6 7 8 Operating Temperature .............40 C to +85 C SGND NC OLS IN MP1517 PD01-QFN16 (3) Thermal Resistance JA JC QFN16 (4mm x 4mm)............. 46...... 10... C/W Part Number* Package Temperature Notes: QFN16 MP1517DR 40 C to +85C 1) Exceeding these ratings may damage the device. (4mm x 4mm) 2) The device is not guaranteed to function outside of its For Tape & Reel, add suffix Z (eg. MP1517DRZ) operating conditions. * 3) Measured on approximately 1 square of 1 oz. Copper. For Lead Free, add suffix LF (eg. MP1517DRLFZ) ELECTRICAL CHARACTERISTICS V = 5.0V, T = +25 C, unless otherwise noted. IN A Parameter SymbolCondition Min Typ Max Units IN Shutdown Supply Current 0.5 1.0 A V 0.3V EN IN Operating Supply Current V > 2V, V = 0.8V 0.9 1.2 mA EN FB BP Voltage V = 2.6V to 25V 2.4 V IN IN Undervoltage Lockout V Rising 2.10 2.40 V IN Threshold IN Undervoltage Lockout 100 mV Hysteresis EN Input Low Voltage 0.4 V EN Input High Voltage 1.5 V EN Input Hysteresis 100 mV EN Input Bias Current 1 A SW Switching Frequency f 0.9 1.1 1.3 MHz SW SW Maximum Duty Cycle V = 0.6V 85 93 % FB (4) Error Amplifier Voltage Gain A 400 V/V VEA Error Amplifier Transconductance G 350 A/V EA COMP Maximum Output Current Sourcing and Sinking 30 A FB Regulation Threshold 679 700 721 mV FB Input Bias Current V = 0.7V 1 A FB SS Charging Current During Soft-Start 2 A MP1517 Rev. 1.4 www.MonolithicPower.com 2 9/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2007 MPS. All Rights Reserved.