MPQ8633B 16V, 20A, Synchronous, Step-Down Converter with Adjustable Current Limit, Programmable Frequency, and Voltage Tracking The Future of Analog IC Technology Proprietary Switching Loss Reduction DESCRIPTION Technique The MPQ8633B is a fully integrated, high- Adaptive COT for Ultrafast Transient frequency, synchronous, buck converter. It Response offers a very compact solution that achieves up Stable with Zero ESR Output Capacitor to 20A of output current with excellent load and 0.5% Reference Voltage over 0C to +70C line regulation over a wide input supply range. Junction Temperature Range The MPQ8633B operates at high efficiency 1% Reference Voltage from -40C to over a wide output current load range. +125C Junction Temperature Range The MPQ8633B adopts an internally Selectable Pulse Skip or Forced CCM compensated constant-on-time (COT) control Operation mode that provides fast transient response and Excellent Load Regulation eases loop stabilization. Output Voltage Tracking The operating frequency can be set to Output Voltage Discharge 600kHz, 800kHz, or 1000kHz easily with MODE PGOOD Active Clamped at Low Level configuration, allowing the MPQ8633B during Power Failure frequency to remain constant regardless of the Programmable Soft-Start Time from 1ms input and output voltages. Pre-Bias Start-Up Selectable Switching Frequency from The output voltage start-up ramp is controlled 600kHz, 800kHz, and 1000kHz by an internal 1ms timer. It can be increased by Non-Latch OCP, UVP, UVLO, Thermal adding a capacitor on TRK/REF. An open-drain Shutdown, and Latch-Off for OVP power good (PGOOD) signal indicates if the Output Adjustable from 0.6V to 90%*VIN, output is within its nominal voltage range. up to 5.5V Max PGOOD is clamped at around 0.7V with an external pull-up voltage when the input supply Available in a QFN-21 (3mmx4mm) fails to power the MPQ8633B. Package Full protection features include over-current APPLICATIONS protection (OCP), over-voltage protection Telecom and Networking Systems (OVP), under-voltage protection (UVP), and Servers, Cloud-Computing, Storage over-temperature protection (OTP). Base Stations The MPQ8633B requires a minimal number of General Purpose Point-of-Load (PoL) readily available, standard, external 12V Distribution Power Systems components and is available in a QFN-21 High-end TV (3mmx4mm) package. Game Consoles and Graphic Cards All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. FEATURES For MPS green status, please visit the MPS website under Quality Wide Input Voltage Range Assurance. MPS and The Future of Analog IC Technology are registered trademarks of Monolithic Power Systems, Inc. o 2.7V to 16V with External 3.3V VCC Bias o 4V to 16V with Internal Bias or External 3.3V VCC Bias Differential Output Voltage Remote Sense Programmable Accurate Current Limit Level 20A Output Current Low R ( ) Integrated Power MOSFETs DS ON MPQ8633B Rev.1.03 www.MonolithicPower.com 1 11/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved. MPQ8633B 16V, 20A, SYNCHRONOUS, STEP-DOWN CONVERTER W/ ADJUSTABLE CURRENT LIMIT, PROGRAMMBALE FREQUENCY, AND VOLTAGE TRACKING TYPICAL APPLICATION MPQ8633B Rev.1.03 www.MonolithicPower.com 2 11/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved.