NCP3235: 4.5 V to 21 V, DC/DC Converter with Integrated MOSFETs

The NCP3235 is a 15 A DC/DC converter with internal MOSFETs and offers flexibility in design. The device can deliver an adjustable output voltage as low as 0.6V to over 80% of the input voltage. Features include adjustable current limit, output voltage, and soft-start timing. Pin selectable features enable switching frequencies of 550 kHz or 1 MHz, selecting DCM/CCM operating modes, and the ability latch off or hiccup mode during over current. The part can be configure to operate in ultra-sonic mode to stay out of the audio band. The part is offered in a thermally enhanced 6mm by 6mm TQFN package.

Features
  • Accurate 0.6 V reference
  • DCM/CCM selectable options
  • 550kHz/1.1MHz switching frequency
  • Ultra-sonic mode
  • Thermally enhanced QFN package
  • Wide operating range 4.5 V to 21 V
  • Adjustable soft start
Benefits
  • Adjustable output to set desired voltage as low as 0.6 V
  • Operate in discontinuous mode for higher efficiency at light loads
  • Design flexibility to select higher efficiency or smaller output filter
  • Keeps capacitors from making audio sounds
  • Higher dissipation with 3 exposed pads
  • Allows for use across multiple applications
  • Allows smooth ramp up during power up
Applications
  • Computing/Servers
  • Datacom/Networking
  • FGPA, ASIC, DSP power
  • 12 V Point of load
End Products
  • Desktops
  • Servers
  • Networking
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
High Current Synchronous Buck ConverterNCP3235/D (312kB)0May, 2016
Simulation Models (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP3231FamilySimplisModelNCP3231FamilySimplisModel (39kB)0Aug, 2016
Package Drawings (1)
Document TitleDocument ID/SizeRevision
QFN40 6x6, 0.5P485CM (58.7kB)O
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP3235MNTXGActivePb-free Halide freeQFN-40485CM3Tape and Reel2500$1.1
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP3235MNTXGStep-DownVoltage Mode4.5210.615up to 97550, 1100
High Current Synchronous Buck Converter (312kB) NCP3235
NCP3231FamilySimplisModel NCP3235
QFN40 6x6, 0.5P NCP5339