NCV890101: Automotive Switching Regulator, Buck, 1.2 A, 2 MHz

The NCV890101 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 NCV890101 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.Two pins are provided to synchronize switching to a clock, or to another NCV890101. The NCV890101 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 36 V
  • Withstands Load Dump to 40 V
  • Auto-synchronizes with Other NCV890101 or to an External Clock
  • Logic level Enable Input Can be Directly Tied to Battery
  • 1.4 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)
  • Low Shutdown Current
  • NCV Prefix for Automotive and Other Applications Requiring Site and Change Controls
  • Wettable Flanks DFN
  • This is a Pb-Free Device
Benefits
  • Enables to use small size, low cost inductor and EMC filter
Applications
  • Audio
  • Infotainment
  • Safety - Vision Systems
  • Instrumentation
End Products
  • Automotive
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCV890100/01/30/31 Design Worksheet - Continuous Conduction ModeNCV8901_00_01_30_31 design sheet (203kB)2Nov, 2014
Package Drawings (1)
Document TitleDocument ID/SizeRevision
DFN10, 3x3, 0.5P485C (33.7kB)E
Simulation Models (4)
Document TitleDocument ID/SizeRevisionRevision Date
Average model for ac simulation on PSPICENCV8901XX_AC_PSPICE (220kB)1
Average model for fast transient simulations on PSPICE (no switching)NCV8901XX_TRANAVG_PSPICE (246kB)1
NCV890100 switching model for PSPICENCV890100_SPICE (11.0kB)0
average model for AC simulation on Spice simulators (other than Pspice)NCV8901xx_SPICE_AC_AVG (194kB)3.1Sep, 2014
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Automotive Switching Regulator, Buck, 1.2 A, 2 MHzNCV890101/D (150kB)3Feb, 2014
Evaluation Board Documents (5)
Document TitleDocument ID/SizeRevisionRevision Date
NCV890101 Automotive Grade High-Frequency Buck Regulator Evaluation Board User's ManualEVBUM2035/D (988.0kB)2
NV890101MWTXGEVB Bill of Materials ROHS CompliantNV890101MWTXGEVB_BOM_ROHS.PDF (44.0kB)1
NV890101MWTXGEVB Gerber Layout Files (Zip Format)NV890101MWTXGEVB_GERBER.ZIP (53.0kB)1
NV890101MWTXGEVB SchematicNV890101MWTXGEVB_SCHEMATIC.PDF (110.0kB)1
NV890101MWTXGEVB Test ProcedureNV890101MWTXGEVB_TEST_PROCEDURE.PDF (55.0kB)1
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NV890101MWTXGEVBActivePb-freeFixed-Frequency Monolithic Buck Switching Regulator Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCV890101MWTXGActiveAEC Qualified PPAP Capable Pb-freeDFN-10485C1Tape and Reel3000$1.6
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCV890101MWTXGStep-DownCurrent Mode4.540Adjustable1.22200
Automotive Switching Regulator, Buck, 1.2 A, 2 MHz (150kB) NCV890101
NCV890100/01/30/31 Design Worksheet - Continuous Conduction Mode NCV890131
Average model for ac simulation on PSPICE NCV890131
Average model for fast transient simulations on PSPICE (no switching) NCV890131
NCV890100 switching model for PSPICE NCV890231
average model for AC simulation on Spice simulators (other than Pspice) NCV890131
EVBUM2035/D - 988 NV890101MWTXGEVB
NV890101MWTXGEVB BOM ROHS NV890101MWTXGEVB
NV890101MWTXGEVB GERBER NV890101MWTXGEVB
NV890101MWTXGEVB SCHEMATIC NV890101MWTXGEVB
NV890101MWTXGEVB TEST PROCEDURE NV890101MWTXGEVB
DFN10, 3x3, 0.5P NLAS4684
NCV890101