MP2174CGG-Z

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, switch mode converter with built-in, internal power MOSFETs. It achieves 4A of continuous output current from a 2.7V to 5.5V input voltage with excellent load and line regulation. The output voltage can be regulated as low as 0.6V.              The constant-on-time (COT) control scheme provides fast transient response and easy loop stabilization. Fault condition protections cycle-by-cycle current limit and shutdown. include thermal The MP2174C requires a minimal number of readily available, standard external components, and is available in an ultra-small QFN-12 (2mmx2mm) package. The MP2174C is ideal for a wide range of applications, including PDAs, portable instruments, DVD drives, and small handheld devices. Forced PWM Mode Operation Wide 2.7V to 5.5V Operating Input Range Output Voltage as Low as 0.6V 4A Output Current 35mΩ and 18mΩ Internal Power MOSFET Peak Efficiency Above 96% 1.1MHz Frequency 100% Duty Cycle in Dropout 0.5ms Internal Soft-Start Time EN and Power Good for Power Sequencing Auto-Discharge at Power-Off Short-Circuit Protection with Hiccup Mode Available in a QFN-12 (2mmx2mm) Package APPLICATIONS    Storage Drives Portable/Handheld Devices Low-Voltage I/O System Power 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”, 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 = 27mΩ 100 L1 1µH C1 22µF PVIN SW VIN OUT MP2174C EN EN PG PG C2 22µF R1 200k FB AGND NC PGND 90 VOUT 1.2V/4A R2 200k 80 EFFICIENCY (%) VIN 70 60 50 40 Vout=1.2V Vout=1.8V Vout=2.5V Vout=3.3V 30 20 10 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 8/7/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 1 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. MP2174CGG–Z). TOP MARKING KC: Product code of MP2174CGG Y: Year code LLL: Lot number PACKAGE REFERENCE QFN-12 (2mmx2mm) PIN FUNCTIONS Pin # Name Description 1 2, 11 PVIN SW Supply voltage to power FETs. PVIN is connected to VIN internally. Switch output. Pin 2 and 11 can be connected together. 3, 12 4 5 6 PGND AGND NC OUT 7 FB 8 9 EN PG Power ground. Pin 3 and 12 can be connected together. Quiet ground for controller circuits. No connection. Leave this pin open. Do not connect it to ground. Input sense pin for output voltage. Feedback. An external resistor divider from the output to GND, tapped to the FB pin, sets the output voltage. On/off control. 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 8/7/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 2 MP2174C – 5.5V, 4A, 1.1MHZ, SYNCHRONOUS STEP-DOWN SWITCHER θJA θJC ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance Supply voltage (VIN) ....................................6.5V VSW .................................................................... -0.3V (-3V for