DATA SHEET www.onsemi.com Automotive Grade Non-Synchronous Boost SOIC8 D SUFFIX Controller CASE 751 NCV8870 MARKING DIAGRAM The NCV8870 is an adjustable output nonsynchronous boost 8 controller which drives an external N-channel MOSFET. The device 8870xxG ALYW uses peak current mode control with internal slope compensation. The IC incorporates an internal regulator that supplies charge to the gate driver. 1 Protection features include internally-set soft-start, undervoltage (Top View) lockout, cycle-by-cycle current limiting, hiccup-mode short-circuit protection and thermal shutdown. 8870xxG = Specific Device Code xx = 01 Additional features include low quiescent current sleep mode and A = Assembly Location externally-synchronizable switching frequency. L = Wafer Lot Y = Year Features W = Work Week Peak Current Mode Control with Internal Slope Compensation = PbFree Package 1.2 V 2% Reference voltage Fixed Frequency Operation PIN CONNECTIONS Wide Input Voltage Range of 3.2 V to 40 Vdc, 45 V Load Dump Input Undervoltage Lockout (UVLO) EN/SYNC 1 8 VFB Internal Soft-Start 2 ISNS 7 VC Low Quiescent Current in Sleep Mode 3 GND 6 VIN Cycle-by-Cycle Current Limit Protection 4 GDRV 5 VDRV Hiccup-Mode Overcurrent Protection (OCP) Hiccup-Mode Short-Circuit Protection (SCP) Thermal Shutdown (TSD) NCV Prefix for Automotive and Other Applications Requiring ORDERING INFORMATION Unique Site and Control Change Requirements AECQ100 Device Package Shipping Qualified and PPAP Capable NCV887001D1R2G SOIC8 2500 / This is a Pb-Free Device (PbFree) Tape & 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, 2017 1 Publication Order Number: November, 2021 Rev. 14 NCV8870/DNCV8870 V g VIN 6 TEMP C L VDRV g C DRV FAULT D VDRV LOGIC 5 V o CLK EN/ EN/SYNC OSC GDRV Q 1 DRIVE 4 SYNC LOGIC SC ISNS 2 C o CL R CSA SNS GND VC 7 3 + R SCP R F1 C VFB 8 C C Gm R F2 SS V ref Figure 1. Simplified Block Diagram and Application Schematic PACKAGE PIN DESCRIPTIONS Pin No. Pin Symbol Function 1 EN/SYNC Enable and synchronization input. The falling edge synchronizes the internal oscillator. The part is disabled into sleep mode when this pin is brought low for longer than the enable time-out period. 2 ISNS Current sense input. Connect this pin to the source of the external N-MOSFET, through a cur- rent-sense resistor 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 VIN. Bypass with a 1.0 F ceramic capacitor to ground. 6 VIN Input voltage. If bootstrapping operation is desired, connect a diode from the input supply to VIN, in addition to a diode from the output voltage to VDRV and/or VIN. 7 VC Output of the voltage error amplifier. An external compensator network from VC to GND is used to stabilize the converter. 8 VFB Output voltage feedback. A resistor from the output voltage to VFB with another resistor from VFB to GND creates a voltage divider for regulation and programming of the output voltage. ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND, unless otherwise indicated) Rating Value Unit Dc Supply Voltage (VIN) 0.3 to 40 V Peak Transient Voltage (Load Dump on VIN) 45 V Dc Supply Voltage (VDRV, GDRV) 12 V Peak Transient Voltage (VFB) 0.3 to 6 V Dc Voltage (VC, VFB, ISNS) 0.3 to 3.6 V Dc Voltage (EN/SYNC) 0.3 to 6 V Dc Voltage Stress (VIN VDRV)* 0.7 to 40 V Operating Junction Temperature 40 to 150 C Storage Temperature Range 65 to 150 C Peak Reflow Soldering Temperature: PbFree, 60 to 150 seconds at 217C 265 peak C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. *An external diode from the input to the VIN pin is required if bootstrapping VDRV and VIN off of the output voltage. www.onsemi.com 2 PWM