0.5A, 55V, 480kHz Step-Down Converter in a TSOT23-6

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Product Description

The MP2459 is a monolithic, step-down, switch-mode converter with a built-in power MOSFET. It achieves a 0.5A peak-output current over a wide input supply range with excellent load and line regulation. Current-mode operation provides a fast transient response and eases loop stabilization. Fault condition protections include cycle­by­cycle current limiting and thermal shutdown. The MP2459 requires a minimal number of readily-available external components. The MP2459 is available in a TSOT23-6 package.


Product Features

  • 0.5A Peak Output Current
  • 1Ω Internal Power MOSFET
  • Stable with Low-ESR Ceramic Output Capacitors
  • Up to 90% Efficiency
  • 0.1μA Shutdown Mode
  • Fixed 480kHz Frequency
  • Thermal Shutdown
  • Cycle-by-Cycle Over-Current Protection
  • Wide 4.5V-to-55V Operating Input Range
  • Output Adjustable from 0.81V to 0.95*VIN
  • Available in a TSOT23-6 Package


  • fsw (max) (kHz)480
  • Vin (min) (V)4.5
  • Vin (max) (V)55
  • Iout (max) (A)0.5
  • Isw Limit (typ) (A)1.25
  • Max Duty Cycle (%)0.935
  • Vfb (V)0.812
  • Iq (typ) (mA)0.73
  • Regulated Outputs1
  • Vout (max) (V)52
  • Vout (min) (V)0.81
  • GradeCatalog
  • PackageTSOT23-6

0.5A, 480kHz, 55V Step-Down Converter Evaluation Board

The EV2459-J-00A is an evaluation board for the MP2459, a fixed 480kHz frequency step-down switching regulator with an integrated high-side high voltage power MOSFET.

The board can provide the load current up to 0.6A. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition. The 5V to 55V input range accommodates a variety of step-down applications.

The board provides compact arrangement of components. By switching at 480kHz, smaller value inductor and input/output capacitor can be used to lower down cost and save board space.

$25.00 + tax

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.