Power Management Unit - Automotive, Battery-Connected, Multi-Output NCV97311A www.onsemi.com Description The NCV97311A is a 3 output regulator consisting of a lowIq batteryconnected 3 A, 2 MHz non synchronous switcher and two lowvoltage 1.5 A, 2 MHz synchronous switchers all using integrated power transistors. 1 32 The highvoltage switcher is capable of converting a 4.1 V to 18 V QFNW32 battery input to a 5 V or 3.3 V output at a constant 2 MHz switching MW SUFFIX CASE 484AB 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. MARKING DIAGRAM The output of the batteryconnected buck regulator serves as the low 1 voltage input for the 2 downstream synchronous switchers. Each NCV97311 downstream output is adjustable from 1.2 V to 3.3 V, with a 1.5 A xxA average current limit and a constant 2 MHz switching frequency. Each AWLYYWW switcher has an independent enable and reset pin, giving extra power management flexibility. For lowIq operating mode, the lowvoltage switchers are disabled xx = 33 or 50 and the standby rail is supplied by a lowIq LDO (up to 150 mA) with A = Assembly Location WL = Wafer Lot a typical Iq of 30 A. The LDO regulator is in parallel to the YY = Year highvoltage switcher, and is activated when the switcher is forced in WW = Work Week standby mode. = PbFree Package All 3 SMPS outputs use peak current mode control with internal (Note: Microdot may be in either location) slope compensation, internallyset softstart, battery undervoltage lockout, battery overvoltage protection, cycle by cycle current ORDERING INFORMATION limiting, hiccup mode shortcircuit protection and thermal shutdown. See detailed ordering, marking and shipping information on An error flag is available for diagnostics. page 23 of this data sheet. Features 5.0 V and 3.3 V Versions Available Cyclebycycle Current Limit Protections Low Quiescent Current in Standby Mode Hiccup Overcurrent Protections (OCP) Programmable Spread Spectrum for EMI Reduction Individual Reset Pins with Adjustable Delays 2 Microcontroller Enabled Low Voltage Synchronous QFN Package with Wettable Flanks (pin edge plating) Buck Converters NCV Prefix for Automotive and Other Applications Large Conversion Ratio of 18 V to 3.3 V Battery Requiring Unique Site and Control Change Connected Switcher Requirements AECQ100 Qualified and PPAP Capable Wide Input of 4.1 to 45 V with Undervoltage Lockout These Devices are PbFree, Halogen Free/BFR Free (UVLO) and are RoHS Compliant Fixed Frequency Operation Adjustable from 2.0 to 2.6 MHz Typical Applications Internal 1.5 ms Softstarts Infotainment, Body Electronics, Telematics, ECU Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: November, 2019 Rev. 3 NCV97311A/DNCV97311A STBYB VDRV VDRV1 VDD BST1 REGULATOR 1 VBAT SW1 5.0 V STEP DOWN COMP1 VINL LOGIC RSTB RMIN RSTB1 LINEAR VOUT REGULATOR EN Master Enable GND1 Exposed Pad VDRV VDRV2 BST2 REGULATOR 2 VIN2 1.2 V > 3.3 V STEP DOWN SW2 FB2 EN2 RSTB RSTB2 GND2 BST3 REGULATOR 3 VIN3 1.2 > 3.3 V SW3H STEP DOWN SW3L FB3 EN3 RSTB RSTB3 GND3 TEMP OT ROSC WARNING OSC VIN UVLO ERR VIN OV RMOD RSTB1 RDEPTH RSTB2 ERRB RSTB3 Figure 1. NCV97311A Block Diagram 5.0 V Version www.onsemi.com 2