MP1479 18V, 1A, 800kHz, High-Efficiency, Synchronous, Step-Down Converter in SOT563 Package DESCRIPTION FEATURES The MP1479 is a fully integrated, high- Wide 4.2V to 18V Operating Input Range frequency, synchronous, rectified, step-down, 140m/60m Low R Internal Power DS(ON) switch-mode converter with internal power MOSFETs MOSFETs. The MP1479 offers a very compact 190A Low I Q solution that achieves 1A of continuous output Highly Efficient Synchronous Mode current with excellent load and line regulation Operation over a wide input range. The MP1479 uses Power-Save Mode at Light Load synchronous mode operation for higher Fast Load Transient Response efficiency over the output current load range. 800kHz Switching Frequency Constant-on-time (COT) control operation Internal Soft Start (SS) provides very fast transient response, easy loop Over-Current Protection (OCP) and Hiccup design, and very tight output regulation. Thermal Shutdown Output Adjustable from 0.8V Full protection features include short-circuit Available in a SOT563 Package protection (SCP), over-current protection (OCP), under-voltage protection (UVP), and thermal APPLICATIONS shutdown. Security Cameras The MP1479 requires a minimal number of Digital Set-Top Boxes readily available, standard, external Flat-Panel Televisions and Monitors components and is available in a space-saving General Purposes SOT563 package. 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 VOUT = 3.3V, L = 4.7H, DCR = 24.5m R4 10 100 C3 1 F 95 12V L1 3.3V/1A 90 4.7 H VIN VOUT BST VIN SW 85 R1 C1 80 C2 R3 40.2k 22 F 47k 22F 75 FB MP1479 Vin=5V R2 70 Vin=12V 13k 65 Vin=18V EN EN GND 60 0.01 0.1 1 LOAD CURRENT(A) MP1479 Rev. 1.0 www.MonolithicPower.com 1 5/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved. EFFICIENCY(%)MP1479 18V, 1A, 800kHz, SYNC, STEP-DOWN CONVERTER W/ INTERNAL MOSFETS ORDERING INFORMATION Part Number* Package Top Marking MP1479GTF SOT563 See Below * For Tape & Reel, add suffix Z (e.g.: MP1479GTFZ). TOP MARKING BAR: Product code of MP1479GTF Y: Year code LLL: Lot number PACKAGE REFERENCE TOP VIEW VIN 1 6 FB SW 2 5 EN MP1479 GND 3 4 BST SOT563 MP1479 Rev. 1.0 www.MonolithicPower.com 2 5/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved.