NCP3233: Step Down Converter Operates from 3V to 16V and delivers up to 20A

The NCP3233 is a 20A step down converter (with internal MOSFETs) capable of operating from 3V to 16V without the need for an external bias. This fixed frequency converter offers high efficiency and the output can be adjusted to offer a voltage as low as 0.6V. An adjustable current limit allows the device to be used for multiple current levels. The part is offered is a thermally enhanced 6mm by 6mm QFN package ent, high efficiency voltage-mode synchronous buck converter which operates from 4.5 V to 18 V input and generates output voltages down to 0.6 V at up to 25 A DC load or 30 A instantaneous load.

Features
  • Wide input voltage range from 3V to 16V
  • 300kHz, 500kHz, and 1MHz switching frequency
  • Lossless low-side FET current sensing
  • 0.6V internal reference volttage
  • External programmable soft-start
  • Pre-bias Start-up
  • Hiccup Mode Operation for all Faults
  • Adjustable Output Voltage
  • Adjustable current limt
  • Output Over-voltage Protection and Under-voltage Protection
Benefits
  • Allows same device to be used for 3.3V, 5V, and 12V bus rails
  • User selectable option to allow optimized trade-off between efficiency and solution size
  • Improve efficiency
  • Low voltage output to accommodate low voltage cores
  • Reduces in-rush current and prevents unwarranted overcurrent during start up
  • Prevents reverse current flow
  • Allows re-start if fault conditions are eliminated
  • Flexibility
  • Optimize for overcurrent conditions. Allow smaller inductors with lower saturation currents to be used for lower current applications
Applications
  • High current POL applications
  • ASIC, FPGA, DSP and CPU Core and I/O Supplies
End Products
  • Cellular Base Stations
  • Telecom and Network Equipment
  • Server and Storage System
Package Drawings (1)
Document TitleDocument ID/SizeRevision
QFN40, 6x6, 0.5P485AZ (63.1kB)O
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
High Current Synchronous Buck ConverterNCP3233/D (129kB)5Feb, 2016
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP3233MNTXGActivePb-free Halide freeQFN-40485AZ3Tape and Reel2500$1.05
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP3233MNTXGStep-DownVoltage Mode3160.62095500
High Current Synchronous Buck Converter (129kB) NCP3233
QFN40, 6x6, 0.5P NCP5369