MIC22400YTSE Microchip

MIC22400 4A Integrated Switch Synchronous Buck Regulator with Frequency Pr ogrammable up to 4 MHz Features General Description Input Voltage Range: 2.6V to 5.5V The MIC22400 is a high-efficiency, 4A integrated switch synchronous buck (step-down) regulator. The Output Voltage Adjustable Down to 0.7V MIC22400 is optimized for highest efficiency, achieving Output Load Current Up to 4A over 90% efficiency while still switching at 1 MHz over Full Sequencing and Tracking Ability a broad load range. The ultra high-speed control loop Power-On-Reset (POR) keeps the output voltage within regulation even under Efficiency >90% Across a Broad Load Range extreme transient load swings commonly found in FPGAs and low-voltage ASICs. The output voltage can Programmable Frequency 300 kHz to 4 MHz be adjusted down to 0.7V to address all low-voltage Easy Ramp Control (RC) Compensation power needs. The MIC22400 gives a full range of Ultra-Fast Transient Response sequencing and tracking options. The EN/DLY pin 100% Maximum Duty Cycle combined with the Power-On-Reset (POR) pin allows Fully Integrated MOSFET Switches multiple outputs to be sequenced in any way on turn-on Micropower Shutdown and turn-off. The Ramp Control (RC) pin allows the device to be connected to another MIC22400 family of Thermal-Shutdown and Current-Limit Protection products to keep the output voltages within a certain V 20-Pin 3 mm x 4 mm QFN on start-up. 20-Pin ePad TSSOP The MIC22400 is available in a 20-pin 3 mm x 4 mm 40C to +125C Junction Temperature Range QFN and thermally-enhanced 20-pin ePad TSSOP with a junction operating range from 40C to +125C. Applications High Power Density Point-of-Load Conversion Servers and Routers DVD Recorders Computing Peripherals Base Stations FPGAs, DSP, and Low-Voltage ASIC Power Package Types MIC22400 MIC22400 20-Lead QFN (ML) 20-Lead TSSOP (TS) (Top View) (Top View) EN 1 20 PVIN DELAY 2 19 NC 20 19 18 17 RC 3 18 PGND 16 POR 1 PGND POR 4 17 SW 2 CF 15 SW CF 5 16 SW 3 14 NC SW COMP 6 15 SW 4 13 COMP SW 5 12 NC 7 14 SW NC SW 6 11 FB 8 13 PGND FB PGND 78 9 10 SGND 9 12 NC SVIN 10 11 PVIN 2019 Microchip Technology Inc. 1DS20006243A-page SGND RC SVIN DELAY NC EN PVIN PVINMIC22400 Typical Application Circuit MIC22400 4A Synchronous Buck Regulator SW PVIN V IN SW PVIN 5V SW 1H V SVIN OUT SW 3.3V/4A 47F EN POR N 10F RC (Ramp Control) FB DELAY COMP 1nF 39pF CF EP PGND SGND N 390pF Functional Block Diagram SVIN PVIN VDD 1A + 360mV VL 1.24V - 0.7V VREF SW Blank EN Adaptive SW OSE CF 1V Drive RQ 120N S FB VREF 120 N PGND 24 N 50pF COMP VDD 1A DELAY Sequence 1A VDD & Tracking Control 1A POR RC 1A SGND DS20006243A-page 2 2019 Microchip Technology Inc.