Automotive Grade Start-Stop Non-Synchronous Boost Controller NCV8878 The NCV8878 is a Non-Synchronous Boost controller designed to www.onsemi.com supply a minimum output voltage during Start-Stop vehicle operation battery voltage sags. The controller drives an external N-channel MOSFET. The device uses peak current mode control with internal slope compensation. The IC incorporates an internal regulator that 8 supplies charge to the gate driver. 1 Protection features include, cycle-by-cycle current limiting and SOIC8 thermal shutdown. D SUFFIX CASE 751 Additional features include low quiescent current sleep mode STYLE N/A operation. The NCV8878 is enabled when the supply voltage drops below the wake up threshold. Boost Operation is initiated when the supply voltage drops below the regulation set point. MARKING DIAGRAM Features 8 Automatic Enable Below Wake Up Threshold Voltage (Factory 8878xx ALYW Programmable) Status Pin Diagnostic Function 1 Override Disable Function Boost Mode Operation at Regulation Set Point 8878xx = Specific Device Code xx = 01 2% Output Accuracy Over Temperature Range A = Assembly Location Peak Current Mode Control with Internal Slope Compensation L = Wafer Lot Wide Input Voltage Range of 2 V to 40 V, 45 V Load Dump Y = Year W = Work Week Low Quiescent Current in Sleep Mode (<12 A Typical) = PbFree Package CyclebyCycle Current Limit Protection HiccupMode Overcurrent Protection (OCP) Thermal Shutdown (TSD) PIN CONNECTIONS This is a PbFree Device NCV Prefix for Automotive and Other Applications Requiring STATUS 1 8 DISB Unique Site and Control Change Requirements AECQ100 ISNS 2 7 VC Typical Applications GND 3 6 VOUT Applications Requiring Regulated Voltage through Cranking and StartStop Operation GDRV 4 5 VDRV (Top View) ORDERING INFORMATION Device Package Shipping NCV887801D1R2G SOIC8 2500 / Tape & (PbFree) Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: September, 2019 Rev. 4 NCV8878/DNCV8878 LP MBR2045FMFS NRVB440FS VOUT Co V Micro BATTERY Cg IN STATUS NVMFS5844NL STATUS VDRV GDRV CDRV ISNS DISABLE DISB RSNS VOUT VC GND RC CC Figure 1. Typical Application Battery In Sleep Threshold Wake Up Threshold Regulation VOUT STATUS Wakeup Internal Clamp DISB Voltage COMP GDRV Wake Up Delay GDRV Switching Delay Figure 2. Functional Waveforms PACKAGE PIN DESCRIPTIONS Pin Symbol Pin No. Function 1 STATUS This is an opendrain diagnostic. IC status operation flag indicator. This output is a logic low when IC VOUT is below the wake up threshold voltage (Th ) and device is active. A pullup resistor of around 80 k should ic,en be connected between STATUS and a microcontroller reference. This output is a logic high when the IC is disabled or in UVLO. 2 ISNS Current sense input. Connect this pin to the source of the external NMOSFET, through a currentsense res- istor to ground to sense the switching current for regulation and current limiting. 3 GND Ground reference. 4 GDRV Gate driver output. Connect to gate of the external N MOSFET. A series resistance can be added from GDRV to the gate to tailor EMC performance. 5 VDRV Driving voltage. Internally regulated supply for driving the external N MOSFET, sourced from VOUT. Bypass with a 1.0 F ceramic capacitor to ground. 6 VOUT Monitors output voltage and provides IC input voltage. 7 VC Output of the voltage error transconductance amplifier. An external compensator network from VC to GND is used to stabilize the converter. 8 DISB Disable input. This part is disabled when this pin is brought low. www.onsemi.com 2