Controllers | NCV881930

Low Quiescent Current 410 kHz Automotive Synchronous Buck Controller

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The NCV881930 is a 410 kHz fixed−frequency low quiescent current buck controller with spread spectrum that operates up to 38 V (typical). It may be synchronized to a clock or to separateNCV881930. Peak current mode control is employed for fast transient response and tight regulation over wide input voltage and output load ranges. Feedback compensation is internal to the device, permitting design simplification. The NCV881930 is capable of converting from an automotive input voltage range of 3.5 V (4.5 V during startup) to 18 V at a constant base switching frequency. Under load dump conditions up to 45 V the regulator shuts down. A high voltage bias regulator with automatic switchover to an external 5 V bias supply is used for improved efficiency. Several protection features such as UVLO, current limit, short circuit protection, and thermal shutdown are provided. 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 solution.solution.(2 MHz version offered with NCV891930)

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  • ADAS (safety applications)
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  • Automotive

  • 30µA Operating Current at No Load
  • 50 mV Current Limit Sensing
  • Capable of 45 V Load Dump
  • Board Selectable Fixed Output Voltages With Lockout
  • 410 kHz Operating Frequency with synchronization capability
  • Adaptive Non−Overlap Circuitry
  • Integrated Spread Spectrum
  • Logic level Enable Input Can be Tied Directly to Battery
  • Short Circuit Protection Pulse Skip
  • Battery monitoring for UVLO and Overvoltage Protection
  • Thermal Shutdown (TSD)
  • Adjustable Soft−Start
  • Individual Enable and Reset pins
  • QFN Package with Wettable Flanks (pin edge plating)
  • NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
  • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

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NCV881930MW00AR2G

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CAD Model

Pb

A

H

P

QFNW-24

484AE

1

260

REEL

4000

F

Step-Down

1

Current/Voltage Mode

3.5

45

410

$1.4384

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Reliability Data

Die Related Summary Data

Device: NCV881930MW00AR2G

Equivalent to wafer fab process: I3T

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Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

I3T

4

4350769675

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Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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