NCV890203: Automotive Switching Regulator, Buck, 2.0 A, 2 MHz, Reset, Adjustable Delay

The NCV890203 is a fixed−frequency, monolithic, Buck switching regulator intended for Automotive, battery−connected applications that must operate with up to a 36 V input supply. The regulator is suitable for systems with low noise and small form factor requirements often encountered in automotive driver information systems. The NCV890203 is capable of converting the typical 4.5 V to 18 V automotive input voltage range to outputs as low as 3.3 V at a constant switching frequency above the sensitive AM band, eliminating the need for costly filters and EMI countermeasures. A Reset pin signals when the output is in regulation, and a pin is provided to adjust the delay before the RSTB signal goes high. The NCV890203 also provides several protection features expected in Automotive power supply systems such as current limit, short circuit protection, and thermal shutdown. In addition, the high switching frequency produces low output voltage ripple even when using small inductor values and an all−ceramic output filter capacitor − forming a space−efficient switching regulator solution.

Features
  • Internal N−Channel Power Switch
  • Low VIN Operation Down to 4.5 V
  • High VIN Operation to 36 V
  • Withstands Load Dump to 40 V
  • 2 MHz Free−running Switching Frequency
  • Reset with Adjustable Delay
  • Logic level Enable Input Can be Directly Tied to Battery
  • 2.2 A (min) Cycle−by−Cycle Peak Current Limit
  • Short Circuit Protection enhanced by Frequency Foldback
  • ±1.75% Output Voltage Tolerance
  • Output Voltage Adjustable Down to 0.8 V
  • 1.4 Millisecond Internal Soft−Start
  • Thermal Shutdown (TSD)
  • Low Shutdown Current
  • NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements
  • Wettable Flanks DFN (pin edge plating)
  • These Devices are Pb−Free and are RoHS Compliant
Applications
  • Audio
  • Infotainment
  • Safety - Vision Systems
  • Instrumentation
End Products
  • Automotive
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCV890203/04 Design Worksheet - Continuous Conduction ModeNCV890203/04 design sheet (208kB)2Nov, 2014
Package Drawings (1)
Document TitleDocument ID/SizeRevision
DFN10, 3x3, 0.5P485C (33.7kB)E
Simulation Models (2)
Document TitleDocument ID/SizeRevisionRevision Date
Average model for ac simulation on PSPICENCV890203_04_AC_PSPICE (106kB)0
Average model for fast transient simulations on PSPICE (no switching)NCV890203/04_TRANAVG_PSPICE (354kB)0
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
2A, 2MHz Automotive Buck Switching Regulator with RESETNCV890203/D (156kB)0Dec, 2014
Evaluation Board Documents (5)
Document TitleDocument ID/SizeRevisionRevision Date
NCV890203MWGEVB Bill of Materials ROHS CompliantNCV890203MWGEVB_BOM_ROHS (121kB)0
NCV890203MWGEVB Evaluation Board User's ManualEVBUM2234/D (1344kB)0Apr, 2014
NCV890203MWGEVB Gerber Layout Files (Zip Format)NCV890203MWGEVB_Gerber (88kB)0
NCV890203MWGEVB SchematicNCV890203MWGEVB_SCHEMATIC (39kB)0
NCV890203MWGEVB Test ProcedureNCV890203MWGEVB_TEST_PROCEDURE (173kB)0
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCV890203MWGEVBActivePb-free2A 2MHz Automotive Switching Buck Regulator with Reset and Adjustable Delay Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCV890203MWTXGActiveAEC Qualified PPAP Capable Pb-free Halide freeDFN-10485C1Tape and Reel3000$1.33
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCV890203MWTXGStep-DownCurrent Mode4.540Variable22000
2A, 2MHz Automotive Buck Switching Regulator with RESET (156kB) NCV890203
NCV890203/04 Design Worksheet - Continuous Conduction Mode NCV890204
Average model for ac simulation on PSPICE NCV890204
Average model for fast transient simulations on PSPICE (no switching) NCV890204
NCV890203MWGEVB
NCV890203MWGEVB
NCV890203MWGEVB
NCV890203MWGEVB
NCV890203MWGEVB
DFN10, 3x3, 0.5P NLAS4684