NCV97311: Automotive Battery-Connected Low-Iq Multi-Output Power Management Unit with 3 Buck Regulators

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.

Features
  • 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
Applications
  • Infotainment
  • Instruments clusters
  • Body Electronics
  • Telematics
  • ECU
End Products
  • Automotive
Design & Development Tools (2)
Document TitleDocument ID/SizeRevisionRevision Date
NCV97310 Component Selection ToolNCV97310 Component Selection Tool (45kB)3Oct, 2014
NCV97310 Thermal Calculation ToolNCV97310 Thermal Calculation Tool (62kB)4Nov, 2014
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Automotive Battery-Connected Multi-Output Power Management UnitNCV97311/D (234kB)4May, 2016
Evaluation Board Documents (10)
Document TitleDocument ID/SizeRevisionRevision Date
NCV97310 Evaluation Board User's ManualEVBUM2218/D (1767kB)1Oct, 2014
NCV97310MW33GEVB Evaluation Board User's ManualEVBUM2223/D (1759kB)0Jan, 2014
NCV97311MW33GEVB Bill Of Materials ROHS CompliantNCV97311MW33GEVB_BOM_ROHS.pdf (34kB)1
NCV97311MW33GEVB Gerber Layout Files (Zip Format)NCV97311MW33GEVB_GERBER.zip (137kB)1
NCV97311MW33GEVB SchematicNCV97311MW33GEVB_SCHEMATIC.pdf (262kB)1
NCV97311MW33GEVB Test ProcedureNCV97311MW33GEVB_TEST_PROCEDURE.pdf (159kB)0
NCV97311MW50GEVB Bill Of Materials ROHS CompliantNCV97311MW50GEVB_BOM_ROHS.pdf (36kB)1
NCV97311MW50GEVB Gerber Layout Files (Zip Format)NCV97311MW50GEVB_GERBER.zip (137kB)1
NCV97311MW50GEVB SchematicNCV97311MW50GEVB_SCHEMATIC.pdf (270kB)1
NCV97311MW50GEVB Test ProcedureNCV97311MW50GEVB_TEST_PROCEDURE.pdf (242kB)0
Package Drawings (1)
Document TitleDocument ID/SizeRevision
QFN32, 5x5, 0.5P, 3.1x3.1EP488AM (57.4kB)A
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCV97311MW33GEVBActivePb-freeAutomotive Battery-Connected Low-Iq Multi-Output Power Management Unit with 3 Buck Regulators Evaluation Board
NCV97311MW50GEVBActivePb-freeAutomotive Battery-Connected Low-Iq Multi-Output Power Management Unit with 3 Buck Regulators Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCV97311MW33R2GActiveAEC Qualified PPAP Capable Pb-free Halide freeQFN-32488AM1Tape and Reel5000$2.0
NCV97311MW50R2GActiveAEC Qualified PPAP Capable Pb-free Halide freeQFN-32488AM1Tape and Reel5000$2.0
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCV97311MW33R2GStep-DownCurrent Mode4.1451.2 - 53852000
NCV97311MW50R2GStep-DownCurrent Mode4.1451.2 - 53852000
Automotive Battery-Connected Multi-Output Power Management Unit (234kB) NCV97311
NCV97310 Component Selection Tool NCV97311
NCV97310 Thermal Calculation Tool NCV97311
NCV97310 Evaluation Board User's Manual NCV97311
NCV97310MW33GEVB Evaluation Board User's Manual NCV97311
NCV97311MW33GEVB BOM ROHS NCV97311MW33GEVB
NCV97311MW33GEVB GERBER NCV97311MW33GEVB
NCV97311MW33GEVB SCHEMATIC NCV97311MW33GEVB
NCV97311MW33GEVB TEST PROCEDURE NCV97311MW33GEVB
NCV97311MW50GEVB BOM ROHS NCV97311MW50GEVB
NCV97311MW50GEVB GERBER NCV97311MW50GEVB
NCV97311MW50GEVB SCHEMATIC NCV97311MW50GEVB
NCV97311MW50GEVB TEST PROCEDURE NCV97311MW50GEVB
QFN32, 5x5, 0.5P, 3.1x3.1EP NCN6804