NCV890230 2 A, 2 MHz Automotive Buck Switching Regulator The NCV890230 is a fixedfrequency, monolithic, Buck switching regulator intended for Automotive, batteryconnected applications that must operate with up to a 36 V input supply. The regulator is www.onsemi.com suitable for systems with low noise and small form factor requirements often encountered in automotive driver information MARKING systems. The NCV890230 is capable of converting the typical 4.5 V to DIAGRAM 18 V automotive input voltage range to outputs as low as 3.3 V at a 8 constant switching frequency above the sensitive AM band, eliminating the need for costly filters and EMI countermeasures. The V890230 NCV890230 also provides several protection features expected in ALYWX SOIC8 EP 8 CASE 751AC Automotive power supply systems such as current limit, short circuit 1 protection, and thermal shutdown. In addition, the high switching 1 frequency produces low output voltage ripple even when using small A = Assembly Location inductor values and an allceramic output filter capacitor forming a L = Wafer Lot spaceefficient switching regulator solution. Y = Year W = Work Week Features = PbFree Device Internal NChannel Power Switch Low V Operation Down to 4.5 V IN ORDERING INFORMATION High V Operation to 36 V IN See detailed ordering and shipping information in the package Withstands Load Dump to 45 V dimensions section on page 17 of this data sheet. 2 MHz Freerunning Switching Frequency Logic level Enable Input Can be Directly Tied to Battery 2.2 A (min) CyclebyCycle Peak Current Limit Short Circuit Protection enhanced by Frequency Foldback 1.75% Output Voltage Tolerance Output Voltage Adjustable Down to 0.8 V 1.4 Millisecond Internal SoftStart These Devices are PbFree and are RoHS Compliant Thermal Shutdown (TSD) Applications Low Shutdown Current Audio NCV Prefix for Automotive and Other Applications Infotainment Requiring Unique Site and Control Change Safety Vision Systems Requirements AECQ100 Qualified and PPAP Instrumentation Capable CDRV DBST NCV890230 L1 VIN VOUT 1 VIN SW 8 CBST CIN COUT DFW 2 DRV BST 7 RFB1 3 GND FB 6 EN 45EN COMP RFB2 RCOMP CCOMP Figure 1. Typical Application Semiconductor Components Industries, LLC, 2014 1 Publication Order Number: October, 2014 Rev. 2 NCV890230/DNCV890230 CDRV DBST VIN SW L1 VIN CIN DFW 3.3 V CBST COUT Reg DRV Oscillator BST PWM LOGIC ON OFF 2 A + + + FB GND + TSD SoftStart RESET COMP VOLTAGES MONITORS RCOMP EN Enable CCOMP Figure 2. NCV890230 Block Diagram www.onsemi.com 2 +