NCV890230: Automotive Buck Switching Regulator, 2 A, 2 MHz , 45 V Load Dump

The NCV890230 is a fixed-frequency, monolithic, Buck switching regulator intended for Automotive, battery-connected applications that must operate with up to a 36V input supply. The regulator is suitable for systems with low noise and small form factor requirements often encountered in automotive driver information systems. The NCV890230 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. The NCV890230 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
  • 2 MHz Free-running Switching Frequency
  • Internal N-Channel Power Switch
  • Low VIN Operation Down to 4.5 V
  • High VIN Operation to 32 V
  • Withstands Load Dump to 45 V
  • 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 ms Internal Soft-Start
  • Thermal Shutdown (TSD)
Benefits
  • Enables to use small size, low cost inductor and EMC filter
  • Fewer external components
  • Maintains operation during battery transients
  • Maintains operation during battery transients
  • Protects the load from load dump
  • Flexible enable
  • Protects against over current faults
  • Protects against short circuits on the output
  • Highly accurate regulation.
  • Suitable for a wide range of applications
  • Limits inrush current
  • Thermally protects IC
Applications
  • Audio
  • Infotainment
  • Safety - Vision Systems
  • Instrumentation
End Products
  • Automotive
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCV890200/01/30/31 Design Worksheet - Continuous Conduction ModeNCV8902_00_01_30_31 design sheet (206kB)2Nov, 2014
Package Drawings (1)
Document TitleDocument ID/SizeRevision
SOIC-8 EP751AC (33.6kB)B
Simulation Models (3)
Document TitleDocument ID/SizeRevisionRevision Date
Average model for ac simulation on PSPICEAverage model for ac simulation on PSPICE (104kB)1
Average model for fast transient simulations on PSPICE (no switching)NCV8902XX_TRANAVG_PSPICE  (339kB)1
NCV890100 switching model for PSPICENCV890100_SPICE (11.0kB)0
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
2 A, 2 MHz Automotive Buck Switching RegulatorNCV890230/D (138kB)2Oct, 2014
Evaluation Board Documents (4)
Document TitleDocument ID/SizeRevisionRevision Date
NV890230PDR2GEVB Bill of Materials ROHS CompliantNV890230PDR2GEVB_BOM_ROHS (90kB)0
NV890230PDR2GEVB Gerber Layout Files (Zip Format)NV890230PDR2GEVB_GERBER (52kB)0
NV890230PDR2GEVB SchematicNV890230PDR2GEVB_SCHEMATIC (131kB)0
NV890230PDR2GEVB Test ProcedureNV890230PDR2GEVB_TEST_PROCEDURE (51kB)0
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NV890230PDR2GEVBActivePb-freeAutomotive Buck Switching Regulator, 2 A, 2 MHz , Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCV890230PDR2GActiveAEC Qualified PPAP Capable Pb-freeSOIC-8 EP751AC2Tape and Reel2500$1.25
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCV890230PDR2GStep-DownCurrent Mode4.545Adjustable22250
2 A, 2 MHz Automotive Buck Switching Regulator (138kB) NCV890230
NCV890200/01/30/31 Design Worksheet - Continuous Conduction Mode NCV890231
Average model for ac simulation on PSPICE NCV890231
Average model for fast transient simulations on PSPICE (no switching) NCV890231
NCV890100 switching model for PSPICE NCV890231
NV890230PDR2GEVB
NV890230PDR2GEVB
NV890230PDR2GEVB
NV890230PDR2GEVB
SOIC-8 EP NCV8668