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  4. 21V, 3A, 500kHz, Synchronous Step-Down Converter MPQ28261 (Monolithic Power Systems, Inc.)
21V, 3A, 500kHz, Synchronous Step-Down Converter MPQ28261-MPQ28261
21V, 3A, 500kHz, Synchronous Step-Down Converter MPQ28261-Monolithic Power Systems, Inc.

21V, 3A, 500kHz, Synchronous Step-Down Converter MPQ28261
Monolithic Power Systems, Inc.

About This Product

■Summary

The MPQ28261 is a synchronous rectification, switch-mode step-down converter with an integrated 120mΩ high-side MOSFET and 20mΩ low-side MOSFET. It provides a very compact solution with excellent load and line regulation, and provides continuous 3A output current over a wide input supply range. Synchronous rectification mode operation increases efficiency over the entire output current load range and uses a fixed 500kHz switching frequency. Current mode operation provides fast transient response and improves loop stability. Extensive protection features include transient current protection and thermal shutdown. The MPQ28261 has an external SS pin to program the soft-start time and power good signal output. The MPQ28261 requires a minimal number of standard off-the-shelf external components and is available in a space-saving 3mm x 4mm 14-pin QFN package.

■Features and benefits

・Wide operating input range from 4.5V to 21V ・Maximum continuous output current of 3A ・Built-in 120mΩ high-side and 20mΩ low-side power MOSFETs ・1% reference voltage accuracy ・Up to 85% efficiency (for voltage drop from 12V to 1.2V) ・Fixed 500kHz switching frequency ・External soft start ・Power good output ・OCP and thermal shutdown ・Output adjustable from 0.603V to 18V ・Provided in a 3mm x 4mm 14-pin QFN package

■Available product numbers

・MPQ28261DL-LF-P MPQ28261DL-LF-Z ・Part numbers ending in P and Z are the same part. P and Z indicate reel size only

  • Product

    21V, 3A, 500kHz, Synchronous Step-Down Converter MPQ28261

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1 Models of 21V, 3A, 500kHz, Synchronous Step-Down Converter MPQ28261

Image Part Number Price (excluding tax) Iout (max) (A) Iq (typ) (mA) Max Duty Cycle (%) P.G. SS Vfb (V) Fsw (max) (kHz) Grade Package (mm) Input voltage (max) (V) Input voltage (min) (V)
21V, 3A, 500kHz, Synchronous Step-Down Converter MPQ28261-Part Number-MPQ28261

MPQ28261

Available upon quote

3

0.7

92

Yes

External

0.603

500

Industrial

QFN-14 (3x4)

Twenty one

4.5

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About Company Handling This Product

Monolithic Power Systems, Inc.

Company Overview

Monolithic Power Systems (MPS), founded in 1997 and headquartered in San Jose, California, is a manufacturer o...

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