NCV890231MWTXG ON Semiconductor

NCV890231 Buck Switching Regulator - Automotive 2.0 A, 2 MHz The NCV890231 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 DIAGRAM systems. The NCV890231 is capable of converting the typical 4.5 V to 18 V automotive input voltage range to outputs as low as 3.3 V at a V8902 constant switching frequency above the sensitive AM band, 31 ALYW DFN10 eliminating the need for costly filters and EMI countermeasures. Two CASE 485C pins are provided to synchronize switching to a clock, or to another NCV890231. The NCV890231 also provides several protection A = Assembly Location features expected in Automotive power supply systems such as current L = Wafer Lot Y = Year limit, short circuit protection, and thermal shutdown. In addition, the W = Work Week high switching frequency produces low output voltage ripple even = PbFree Device when using small inductor values and an allceramic output filter (Note: Microdot may be in either location) capacitor forming a spaceefficient switching regulator solution. ORDERING INFORMATION Features See detailed ordering and shipping information in the package Internal NChannel Power Switch dimensions section on page 18 of this data sheet. Low V Operation Down to 4.5 V IN High V Operation to 36 V Thermal Shutdown (TSD) IN Withstands Load Dump to 45 V Low Shutdown Current 2 MHz Freerunning Switching Frequency Wettable Flanks DFN Autosynchronizes with Other NCV890231 or to an NCV Prefix for Automotive and Other Applications External Clock Requiring Unique Site and Control Change Requirements AECQ100 Qualified and PPAP Logic level Enable Input Can be Directly Tied to Capable Battery These Devices are PbFree and are RoHS Compliant 2.2 A (min) CyclebyCycle Peak Current Limit Applications Short Circuit Protection enhanced by Frequency Foldback Audio 1.75% Output Voltage Tolerance Infotainment Output Voltage Adjustable Down to 0.8 V Safety Vision Systems 1.4 Millisecond Internal SoftStart Instrumentation CDRV DBST NCV890231 L1 VIN VOUT 1 VIN SW 10 CBST COUT CIN DFW 2 DRV BST 9 SYNC SYNC IN OUT RFB1 3 SYNCO SYNCI 8 4 GND FB 7 EN RFB2 56EN COMP RCOMP CCOMP Figure 1. Typical Application Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: August, 2019 Rev. 2 NCV890231/DNCV890231 CDRV DBST VIN SW VIN L1 VOUT CIN DFW 3.3 V CBST COUT Reg Oscillator DRV BST PWM LOGIC SYNCO ON OFF SYNCI Sync In Sync Out Sync In Out 2 A + + + FB GND + TSD SoftStart RESET COMP VOLTAGES MONITORS RCOMP EN Enable CCOMP Figure 2. NCV890231 Block Diagram www.onsemi.com 2 +