Converters | NCV97311

Automotive Battery-Connected Low-Iq Multi-Output Power Management Unit with 3 Buck Regulators

Obsolete

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Overview

The NCV97311 is a 3−output regulator consisting of a low−Iq battery−connected 3 A, 2 MHz non−synchronous switcher and two low−voltage 1.5 A, 2 MHz synchronous switchers; all using integrated power transistors.The high−voltage switcher is capable of converting a 4.1 V to 18 V battery input to a 5 V or 3.3 V output at a constant 2 MHz switching frequency, delivering up to 3 A. In overvoltage conditions up to 37 V, the switching frequency folds back to 1 MHz; in load dump conditions up to 45 V the regulator shuts down.The output of the battery−connected buck regulator serves as the low voltage input for the 2 downstream synchronous switchers. Each downstream output is adjustable from 1.2 V to 3.3 V, with a 1.5 A average current limit and a constant 2 MHz switching frequency. Each switcher has an independent enable and reset pin, giving extra power management flexibility.For low−Iq operating mode, the low−voltage switchers are disabled and the standby rail is supplied by a low−Iq LDO (up to 150 mA) with a typical Iq of 30 A. The LDO regulator is in parallel to the high−voltage switcher, and is activated when the switcher is forced in standby mode.All 3 SMPS outputs use peak current mode control with internal slope compensation, internally−set soft−start, battery undervoltage lockout, battery overvoltage protection, cycle−by−cycle current limiting, hiccup mode short−circuit protection and thermal shutdown. An error flag is available for diagnostics.

  • Infotainment
  • Instruments clusters
  • Body Electronics
  • Telematics
  • ECU

  • Automotive

  • 5.0 V and 3.3 V Versions Available
  • Low Quiescent Current in Standby Mode
  • Programmable Spread Spectrum for EMI Reduction
  • 2 Microcontroller-Enabled Low Voltage Synchronous Buck Converters
  • Large Conversion Ratio of 18 V to 3.3 V Battery Connected Switcher
  • Wide Input of 4.1 to 45 V with Undervoltage Lockout (UVLO)
  • Fixed Frequency Operation Adjustable from 2.0 to 2.6 MHz
  • Internal 1.5 ms Soft−starts
  • Cycle−by−cycle Current Limit Protections
  • Hiccup Overcurrent Protections (OCP)
  • Individual Reset Pins with Adjustable Delays
  • 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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NCV97311MW33R2G

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Obsolete

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Pb

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Reliability Data

Die Related Summary Data

Device: NCV97311MW33R2G

Equivalent to wafer fab process: BP STD LINEAR

Product Technology

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Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

BP STD LINEAR

10

12120914040

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Re-calculate Data

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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