MP2174C 2.7V-5.5V,4A, High-Efficiency, Synchronous Step-Down Converter with Forced CCM in 2 2mm QFN DESCRIPTION FEATURES The MP2174C is a monolithic, step-down, Forced PWM Mode Operation switch mode converter with built-in, internal Wide 2.7V to 5.5V Operating Input Range power MOSFETs. It achieves 4A of continuous Output Voltage as Low as 0.6V output current from a 2.7V to 5.5V input voltage 4A Output Current with excellent load and line regulation. The 35m and 18m Internal Power MOSFET output voltage can be regulated as low as 0.6V. Peak Efficiency Above 96% 1.1MHz Frequency The constant-on-time (COT) control scheme provides fast transient response and easy loop 100% Duty Cycle in Dropout stabilization. 0.5ms Internal Soft-Start Time EN and Power Good for Power Sequencing Fault condition protections include Auto-Discharge at Power-Off cyclebycycle current limit and thermal Short-Circuit Protection with Hiccup Mode shutdown. Available in a QFN-12 (2mmx2mm) The MP2174C requires a minimal number of Package readily available, standard external components, and is available in an ultra-small APPLICATIONS QFN-12 (2mmx2mm) package. Storage Drives Portable/Handheld Devices The MP2174C is ideal for a wide range of applications, including PDAs, portable Low-Voltage I/O System Power instruments, DVD drives, and small handheld All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For devices. MPS green status, please visit the MPS website under Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are registered trademarks of Monolithic Power Systems, Inc. or its subsidiaries. TYPICAL APPLICATION Efficiency vs. Output Current VIN = 5V, DCR = 27m L1 100 1H 90 V OUT VIN PVIN SW 1.2V/4A 80 C1 VIN C2 OUT 22F 22F 70 MP2174C 60 R1 200k EN EN 50 FB 40 R2 PG PG NC 200k Vout=1.2V AGND PGND 30 Vout=1.8V 20 Vout=2.5V 10 Vout=3.3V 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 OUTPUT CURRENT (A) MP2174C Rev. 1.0 www.MonolithicPower.com 1 8/7/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. EFFICIENCY (%)MP2174C 5.5V, 4A, 1.1MHZ, SYNCHRONOUS STEP-DOWN SWITCHER ORDERING INFORMATION Part Number* Package Top Marking MP2174CGG QFN12 (2mm x 2mm) See Below * For Tape & Reel, add suffix Z (e.g. MP2174CGGZ). TOP MARKING KC: Product code of MP2174CGG Y: Year code LLL: Lot number PACKAGE REFERENCE QFN-12 (2mmx2mm) PIN FUNCTIONS Pin Name Description 1 PVIN Supply voltage to power FETs. PVIN is connected to VIN internally. 2, 11 SW Switch output. Pin 2 and 11 can be connected together. 3, 12 PGND Power ground. Pin 3 and 12 can be connected together. 4 AGND Quiet ground for controller circuits. 5 NC No connection. Leave this pin open. Do not connect it to ground. 6 OUT Input sense pin for output voltage. Feedback. An external resistor divider from the output to GND, tapped to the FB pin, 7 FB sets the output voltage. 8 EN On/off control. 9 PG Power good indicator. The output of this pin is an open drain pin. 10 VIN Supply voltage to internal control circuitry. VIN is connected to PVIN internally. MP2174C Rev. 1.0 www.MonolithicPower.com 2 8/7/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved.