Product Overview NCV97310: Multi-output Power Management Unit (PMU) with 3 Buck Regulators. For complete documentation, see the data sheet Product Description The NCV97310 is 3-output regulator consisting of a low-Iq battery-connected 3 A 2 MHz non-synchronous switcher and two lowvoltage 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 36 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 synchronous switchers. Each downstream output is adjustable from 1.2 V to 3.3 V, with a 1.5 A current limit and a constant 2 MHz switching frequency. Each switcher has independent enable and reset pins, 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. Features Benefits • • • • • • • Programmable Spread Spectrum Hiccup Overcurrent Protections Individual Reset Pins with Adjustable Delays QFN Package with Wettable Flanks (Pin Edge Plating) 5.0 V and 3.3 V Primary Output Versions Available Low Quiescent Current in Standby Mode 2 Microcontroller-enabled Low Voltage Synchronous Buck Converters • Large Conversion Ratio of 18 V to 3.3 V for BatteryConnected Switcher • Wide Battery Input of 4.1 V to 45 V with Undervoltage Lockout (UVLO) • Fixed Frequency Operation Adjustable from 2.0 MHz to 2.6 MHz For more features, see the data sheet • • • • Applications • • • • EMI Reduction Reduce power during short-circuit events Voltage Monitoring Aids in visual inspection of solder joints End Products Infotainment Body Electronics Telematics ECU • Automotive Part Electrical Specifications Product Compliance Status Topology Control Mode VCC Min (V) VCC Max (V) VO Typ (V) IO Typ (A) Efficiency (%) fSW Typ (kHz) Package Type NCV97310MW33R2G AEC Qualified Active StepDown Current Mode 4.1 45 1.2-5 3 85 2000 QFN-32 Active StepDown Current Mode 4.1 45 1.2-5 3 85 2000 QFN-32 PPAP Capable Pb-free Halide free NCV97310MW50R2G AEC Qualified PPAP Capable Pb-free Halide free For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016