Low Noise, 1A Linear Regulator

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Product Description

The MP20045 is a low-dropout linear regulator supplies up to 1A current with 140mV dropout voltage. The output voltage is set externally which ranges from 1.5V to 5V by operating from +2.5V to +5.5V input or can be preset internally from 1.5V to 5V. An internal PMOS pass element is used to allow a low 110μA ground current, making the MP20045 suitable for battery-power devices. Other features include low-power shutdown, short-circuit and thermal protection. The MP20045 is available in 8-pin QFN (3mm x 3mm) and SOIC8E packages.

Product Features

  • Up to 1A Output Current
  • Low 140mV Dropout at 1A
  • Low 110μA Ground Current
  • Fixed Output Versions Ranging from 1.5V to 5V and Adjustable Versions
  • Open Drain Power-Good Status Output
  • 13μVRMS Low Noise Output
  • 56dB PSRR at 1kHz
  • Current Limiting and Thermal Protection
  • 3mm×3mm QFN8 and SOIC8E Packages


  • Fixed Output Options1.5,1.8,2.8,3.3
  • Vdropout (mV)140 (IO:1000mA)
  • Special FeaturesCurrent Limiting, Power Good
  • GradeCatalog
  • PackageQFN-8 (3x3)
  • Vout (min) (V)1.5
  • Vout (max) (V)5
  • PSRR @ 1kHz (dB)56
  • Iq (typ) (µA)110
  • Noise (µVrms)13
  • Accuracy (±%)2.5
  • Iout (mA)1000
  • Vin (max) (V)5.5
  • Vin (min) (V)2.5
Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.