MPM3811 Power Module in a Small QFN Package

MPS' MPM3811 2.3 V to 5.5 V input, 1 A power module in a small 2 mm x 2 mm x 1.6 mm QFN package

Monolithic Power Systems' MPM3811 is a monolithic, step-down, switch-mode converter with built-in, internal power MOSFETs and an inductor. The MPM3811 achieves 1 A of continuous output current from a 2.3 V to 5.5 V input voltage with excellent load and line regulation. The MPM3811 is ideal for a wide range of applications, including high-performance DSPs, wireless power, portable and mobile devices, and other low-power systems. The output voltage can be regulated as low as 0.6 V. Only input capacitors, output capacitors, and feedback (FB) resistors are needed to complete the design.

The constant-on-time (COT) control scheme provides fast transient response, high light-load efficiency, and easy loop stabilization. Full protection features include cycle-by-cycle current limiting and thermal shutdown. The MPM3811 requires a minimal number of readily available, standard, external components and is available in an ultra-small QFN-10 (2 mm x 2 mm x 1.6 mm) package.

Block Diagram

Image of Monolithic Power Systems' MPM3811 Power Module Block Diagram

  • Up to 91% peak efficiency

  • Wide 2.3 V to 5.5 V operating input range

  • Output voltage as low as 0.6 V

  • 100% duty cycle in dropout

  • 1 A output current

  • 2.2 MHz frequency

  • EN for power sequencing

  • Cycle-by-cycle overcurrent protection (OCP)

  • 0.5 ms internal soft-start (SS) time

  • Output discharge

  • Short-circuit protection (SCP) with hiccup mode

  • Thermal shutdown

  • Stable with low ESR output ceramic capacitors

  • Available in a QFN10 (2 mm x 2 mm x 1.6 mm) package

  • Optical modules

  • IoT devices

  • Handheld printers/POS

  • Portable devices

  • Low voltage I/O system power

  • Space-constraint systems