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NCV890131: Automotive Buck Switching Regulator, 1.2 A, 2 MHz, 45 V Load Dump, Sync In and Sync Out

Datasheet: Buck Switching Regulator Automotive 1.2 A, 2 MHz
Rev. 3 (214kB)
Product Overview
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The NCV890131 is a fixed-frequency, monolithic, Buck switching regulator intended for Automotive, battery-connected applications that must operate with up to a 32 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 NCV890131 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 NCV890131. The NCV890131 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   Benefits
  • 2 MHz Free-running Switching Frequency
  • Enables to use small size, low cost inductor and EMC filter
  • Internal N-Channel Power Switch
  • Fewer external components
  • Low VIN Operation Down to 4.5 V
  • Maintains operation during battery transients
  • High VIN Operation to 32 V
  • Maintains operation during battery transients
  • Withstands Load Dump to 45 V
  • Protects the load from load dump
  • Logic level Enable Input Can be Directly Tied to Battery
  • Flexable enable
  • 1.4 A (min) Cycle-by-Cycle Peak Current Limit
  • Protects against over current faults
  • Short-Circuit Protection enhanced by Frequency Foldback
  • Protects against short circuits on the output
  • ±1.75% Output Voltage Tolerance
  • Highly accurate regulation.
  • Output Voltage Adjustable Down to 0.8 V
  • Suitable for a wide range of applications
  • 1.4 ms Internal Soft-Start
  • Limits inrush current
  • Thermal Shutdown (TSD)
  • Thermally protects IC
  • Auto-synchronizes with Other NCV890101 or to an External Clock
  • Tailored EMC Response
Applications   End Products
  • Audio
  • Infotainment
  • Safety - Vision Systems
  • Instrumentation
  • Automotive
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NV890131MWTXGEVB Active
High Frequency Buck Converter Evaluation Board
Budgetary Price/Unit
Case Outline
NCV890131MWTXG Last Shipments
AEC Qualified
PPAP Capable
NCV890131 DFN-10 485C 1 260 Tape and Reel 3000  
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02 00:00) : 18,000
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Automotive Solutions with the NV890131MWTXGEVB Evaluation Board
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