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

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Product Description

The MPQ2459 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 protections include cycle-by-cycle current limiting and thermal
shutdown. The MPQ2459 requires a minimal number of readily-available, standard, external components. The MPQ2459 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 Input Operating 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
  • GradeIndustrial
  • PackageTSOT23-6

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

The EVQ2459-J-00A is an evaluation board for the MPQ2459, 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.

$50.00 + 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.