MPM3686 Step-Down Power Module

MPS' MPM3686 18 V, 20 A, step-down power module in a 12 mm x 15 mm x 4 mm QFN

Image of MPS' MPM3686 Step-Down Power ModuleMonolithic Power Systems' MPM3686 is an easy-to-use, fully integrated, 20 A step-down DC/DC power module. It integrates the DC/DC converter, power inductor, input/output capacitors, and the necessary resistors/capacitors in a compact QFN 12 mm x 15 mm x 4 mm package. This total power solution needs as few as two external components (one resistor and one capacitor) to work. The MPM3686 can deliver a 20 A output current over a wide input supply voltage range with excellent load and line regulation.

The MPM3686 uses constant-on-time (COT) control to provide fast transient response and ease loop stabilization.

The default under-voltage lockout threshold is internally set around 4.1 V, but a resistor network on the ENABLE pin can increase this threshold. The MPM3686 has an internal LDO to power the control circuits and the integrated power devices. This LDO can be disabled by an external 5 V to boost the efficiency.

The MPM3686 has an internal soft-start (SS) timer (about 3 ms). It can be increased with an extra SS capacitor. An open drain power good signal indicates that the output voltage is within nominal voltage range.

The MPM3686 has fully integrated protection features that include over-current protection, over-voltage protection, and thermal shutdown.

  • Complete 20 A DC/DC solution
  • Wide input voltage range from 2.5 V:
    • 2.5 V to 18 V with external 5 V bias
    • 4.5 V to 18 V with internal bias
  • 1% reference voltage over 0˚C to 70˚C junction temperature range
  • Adaptive COT control for ultrafast transient response
  • Programmable switching frequency from 200 KHz to 1 MHz
  • Support pre-bias start up
  • Programmable soft-start time with default 3 ms
  • Non-latch OCP, OVP, and thermal shutdown
  • Output adjustable from 0.65 V to 5 V
  • 12 mm x 15 mm x 4 mm QFN package
  • Telecom and networking systems
  • Base stations
  • Servers
  • Personal video recorders
  • Flat panel televisions and monitors
  • Distributed power systems

MPM3686 Step-Down Power Module

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
EVAL BOARD FOR MPM3686EVM3686-RU-00AEVAL BOARD FOR MPM36866 - ImmediateView Details
DC DC CONVERTER 0.65-5V 20AMPM3686GRUDC DC CONVERTER 0.65-5V 20A234 - ImmediateView Details
Published: 2015-10-08