Wide Vin 4.5-28V , 6A, OCP Hiccup Mode, COT Synchronous Step-Down Converter with 2-Bit VID

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Product Description

The NB650/NB650H is fully-integrated, high-frequency, synchronous, rectified, step-down, switch-mode converters with dynamic-output–voltage control. It offers a very compact solution to achieve 6A of continuous output current over a wide input supply range, and has excellent load and line regulation. The NB650/NB650H operates at high efficiency over a wide output-current–load range. 
Constant-On-Time control mode provides fast transient response and eases loop stabilization.
2-bit VID inputs support changing the output voltage on-the-fly.
Full protection features include short-circuit protection, over-current protection, over-voltage protection, under-voltage protection, and thermal shut down. 
The NB650/NB650H requires a minimal number of readily-available standard external components, and is available in a space-saving 3mm×4mm QFN17 package.


Product Features

  • Wide 4.5V-to-28V Operating Input Range
  • 6A Output Current
  • Internal 50mΩ High-Side, 18mΩ Low-Side Power MOSFETs
  • Proprietary Switching Loss Reduction Technique
  • 1% Reference Voltage
  • Programmable Soft-Start Time
  • 2-bit VID Input
  • Soft Shutdown
  • Frequency Programmable from 150kHz to 1MHz
  • SCP, OCP, OVP, UVP, and Thermal Shutdown
  • Optional OCP Protection: Latch-Off Mode (NB650) and Hiccup Mode (NB650H)
  • Output Adjustable from 0.6V to 13V
  • Available in QFN17 (3mm×4mm) Package


  • fsw (max) (kHz)1000
  • Vin (min) (V)4.5
  • Vin (max) (V)28
  • Iout (max) (A)6
  • Isw Limit (typ) (A)10
  • Vfb (V)0.6
  • Iq (typ) (mA)0.4
  • Regulated Outputs1
  • Vout (max) (V)13
  • Vout (min) (V)0.6
  • GradeCatalog
  • PackageQFN-17 (3x4)
  • Control ModeCOT
  • Common FeaturesExternal Soft Start, Light-Load Efficiency, Power Good, Synchronous Rectification
  • Special FeaturesDynamic Voltage Scaling, Programmable Frequency, Soft Stop

Reference Materials

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