NCV97311A Series

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

Catalog

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

Part	Voltage/Current - Output 3 [Max]	Voltage/Current - Output 3	Voltage/Current - Output 3 [Min]	Voltage/Current - Output 2 [Max]	Voltage/Current - Output 2 [Min]	Voltage/Current - Output 2	Grade	w/Supervisor	Operating Temperature [Min]	Operating Temperature [Max]	Qualification	Mounting Type	Frequency - Switching [Min]	Frequency - Switching [Max]	w/Sequencer	Package / Case	Supplier Device Package	Voltage/Current - Output 1 [custom]	Voltage/Current - Output 1 [custom]	Voltage - Supply [Min]	Voltage - Supply [Max]	w/LED Driver	Topology	Number of Outputs	Voltage - Output	Voltage - Input [Min]	Voltage - Input [Max]
ON Semiconductor NCV97311MW50AR2G	3.3 V	1.5 A	1.2 V	3.3 V	1.2 V	1.5 A	Automotive		-40 °C	125 °C	AEC-Q100	Surface Mount Wettable Flank	2 MHz	2.6 MHz		32-VFQFN Exposed Pad	32-QFNW (5x5)	3 A	5 V	4.1 V	18 V		Linear (LDO) (2) Step-Down (Buck) Synchronous (2)	4
ON Semiconductor NCV97311MW33AR2G							Automotive		-40 °C	125 °C	AEC-Q100	Surface Mount Wettable Flank				32-VFQFN Exposed Pad	32-QFNW (5x5)							3	3.3 V	4.5 V	34 VDC

Catalog

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

Key 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

Description

The NCV97311A 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 uA. 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.