MP9943

Active
High Efficiency 3A Peak, 36V, Synchronous Step Down Converter with Power Good


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Product Description

The MP9943 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with built-in power MOSFETs. It offers a very compact solution to achieve a 3A peak output current with excellent load and line regulation over a wide input supply range. The MP9943 has synchronous mode operation for higher efficiency over the output current load range. Current-mode operation provides fast transient response and eases loop stabilization. Full protection features include over-current protection and thermal shutdown. The MP9943 requires a minimal number of readily-available standard external components, and is available in a space-saving QFN-8 (3mmx3mm) package.

Programmable

Product Features

  • Wide 4V to 30V Continuous Operating Input Range
  • 36V Input Transient Tolerance
  • 85mO/55mO Low RDS(ON) Internal Power MOSFETs
  • High-Efficiency Synchronous Mode Operation
  • 410kHz Switching Frequency
  • Synchronizes from 200kHz to 2.2MHz External Clock
  • High Duty Cycle for Automotive Cold-crank
  • Internal Power-Save Mode
  • Internal Soft-Start
  • Power Good Indicator
  • Over Current Protection and Hiccup
  • Thermal Shutdown
  • Output Adjustable from 0.8V
  • Available in an QFN-8 (3mmx3mm) package

Parametrics

  • fsw (max) (kHz)410
  • Vin (min) (V)4
  • Vin (max) (V)30
  • Iout (max) (A)3
  • Isw Limit (typ) (A)4.4
  • Max Duty Cycle (%)0.95
  • Vfb (typ) (V)0.792
  • Iq (typ) (mA)0.5
  • Regulated Outputs1
  • Vout (max) (V)28.5
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-8 (3x3)
  • Control ModeCurrent Mode
  • Common FeaturesLight-Load Efficiency, Power Good, Synchronous Rectification
  • Special FeaturesExternal Frequency Sync

Evaluation Kit

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Kit details

The EV9943-Q-00A demonstrates MPS’s MP9943, a high-frequency, synchronous, rectified, step-down converter with built-in high-side and low-side power MOSFETs. The MP9943 offers a very compact solution to achieve a 3A peak output current with excellent load and line regulation over a wide input supply range. The MP9943 has synchronous mode operation for higher efficiency over the output current load range.

Current-mode operation provides fast transient response and eases loop stabilization.

Full protection features includes over-current protection and thermal shutdown.

The MP9943 requires a minimal number of readily-available s is available in a space-saving QFN8 (3mm x 3mm) package.

US$ 25.00 + tax