DATA SHEET www.onsemi.com Step-Down Regulator - 8 Automotive, Low-Iq, 1 Dual-Mode SOIC8 EXPOSED PAD CASE 751AC NCV891330 3 A, 2 MHz MARKING DIAGRAM 8 The NCV891330 is a Dual Mode regulator intended for Automotive, 891330xG batteryconnected applications that must operate with up to a 45 V ALYW input supply. Depending on the output load, it operates either as a PWM Buck Converter or as a Low DropOut Linear Regulator, and is suitable for systems with low noise and Low Quiescent Current requirements 1 often encountered in automotive driver information systems. A reset x = 3 for 3.3 V Output pin (with fixed delay) simplifies interfacing with a microcontroller. = 5 for 5.0 V Output The NCV891330 also provides several protection features expected A = Assembly Location in automotive power supply systems such as current limit, short circuit L = Wafer Lot protection, and thermal shutdown. In addition, the high switching Y = Year W = Work Week frequency produces low output voltage ripple even when using small = PbFree Device inductor values and an allceramic output filter capacitor forming a spaceefficient switching regulator solution. PIN CONNECTIONS Features 30 A Iq in Light Load Condition VIN 1 8 SW 3.0 A Maximum Output Current in PWM Mode Internal Nchannel Power Switch DRV 2 7 BST V Operating Range 3.7 V to 36 V IN 3 6 VOUT Withstands Load Dump to 45 V RSTB Logic Level Enable Pin can be Tied to Battery GND 4 5 EN Fixed Output Voltage of 5.0 V, or 3.3 V 2 MHz Freerunning Switching Frequency (Top View) 2 % Output Voltage Accuracy NCV Prefix for Automotive Requiring Site and Control Changes ORDERING INFORMATION These Devices are PbFree and are RoHS Compliant See detailed ordering and shipping information on page 15 of this data sheet. Typical Applications Audio Infotainment Instrumentation SafetyVision Systems CDRV DBST NCV891330 L1 VIN VOUT VIN SW CBST CIN DFW DRV BST COUT RESET VOUT RSTB EN GND EN Figure 1. Typical Application Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: November, 2021 Rev. 4 NCV891330/DNCV891330 CDRV DBST VIN SW VIN L1 VOUT CIN 3.3 V DFW CBST COUT Reg DRV BST Low PWM Oscillator LOGIC ON OFF Enable VOUT + + + comp EN 3A EN detector + TSD SoftStart RESET VOLTAGES MONITORS RSTB RESET Switcher Supply ON LINEAR REGULATOR MODE ON OVLD SELECTION + GND Logic NCV891330 Figure 2. Simplified Block Diagram Table 1. PIN FUNCTION DESCRIPTION Pin No. Pin Name Description 1 VIN Input voltage from battery. Place an input filter capacitor in close proximity to this pin. 2 DRV Output voltage to provide a regulated voltage to the Power Switch gate driver. 3 RSTB Reset function. Open drain output, pulling down to ground when the output voltage is out of regulation. 4 GND Battery return, and output voltage ground reference. 5 EN This TTL compatible Enable input allows the direct connection of Battery as the enable signal. Grounding this input stops switching and reduces quiescent current draw to a minimum. 6 VOUT Output voltage feedback and LDO output. Feedback of output voltage used for regulation, as well as LDO output in LDO mode. 7 BST Bootstrap input provides drive voltage higher than VIN to the N channel Power Switch for minimum switch Rdson and highest efficiency. 8 SW Switching node of the Regulator. Connect the output inductor and cathode of the freewheeling diode to this pin. EPAD Connect to Pin 4 (electrical ground) and to a low thermal resistance path to the ambient temperature environment. www.onsemi.com 2 + +