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NCP3125: Synchronous Buck Regulator, High Efficiency, Switching, PWM, 4.0 A

Datasheet: 4A High Efficiency Synchronous Regulator
Rev. 2 (290.0kB)
Product Overview
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»Product Change Notification (1)
The NCP3125 is a flexible synchronous PWM Switching Buck Regulator. The NCP3125 is capable of producing output voltages as low as 0.8 V. The NCP3125 also incorporates voltage mode control. To reduce the number of external components, a number of features are internally set, including soft-start and switching frequency. The NCP3125 is currently available in an SOIC-8 package. Family of parts that are pin to pin compatible. NCP3125 (4A), NCP3126 (3A), NCP3127 (2A)
Features   Benefits
  • +5V or +12V Input Voltage
  • Ability to use for various input voltages
  • 60mΩ High-side, 36mΩ Low-side MOSFET
  • High efficiency solution due to low Rdson
  • Output voltage adustable down to 0.8V
  • Ability to output different voltages
  • 4A Continuous Output Current
  • High power density designs
  • Fixed 350kHz PWM Operation
  • No external components required to set frequency
  • 1.0% Initial Output Accuracy
  • High accuracy output and system design
  • Programmage Current Limit
  • Ability to use high efficiency solution for lower output current
  • Family of parts that are pin to pin compatible. NCP3125 (4A), NCP3126 (3A), NCP3127 (2A)
Applications   End Products
  • High Efficiency DC-DC
  • Set-Top-Box (STB)
  • LCD-TV / DTV / PDP
Technical Documentation & Design Resources
Software (1) Package Drawings (1)
Data Sheets (1)  
Availability and Samples
Budgetary Price/Unit
Case Outline
NCP3125ADR2G Last Shipments
Halide free
Synchronous Buck Regulator, High Efficiency, Switching, PWM, 4.0 A SOIC-8 751-07 3 Tape and Reel 2500  
Moisture Sensitivity level (MSL) for surface mount devices (lead free measured at 260°C reflow, non lead free at 235°C reflow)
Market Leadtime (weeks) : Contact Factory
PandS   (2017-02-23) : >1K
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NCP3136  Integrated Synchronous DC-DC Step Down Converter

  • Voltage range of 2.9 V to 5 V is ideal for 3.3 V and 5 V bus applications
  • Automatic DCM/CCM and FCCM operating modes for improved efficiency at light loads
  • Switching frequency of 1.1 MHz minimizes the use of passives