NCV891334MW50R2G ON Semiconductor

NCV891234, NCV891334 2 MHz Low-I Dual-Mode Q Step-Down Regulator for Automotive The NCV891x34 is a Dual Mode regulator intended for Automotive, batteryconnected applications that must operate with up to a 45 V www.onsemi.com input supply. Hybrid Low Power Mode allows the NCV891x34 to operate either as a PWM Buck Converter or as a Low DropOut Linear Regulator, and the NCV891x34 is suitable for systems with Low Noise and Low Quiescent Current requirements often encountered in automotive driver information systems. A reset (with fixed delay) and 1 a fault pin (flagging low input voltage and high temperature warnings) DFN12 simplify interfacing with a microcontroller. MW SUFFIX CASE 506CE Two pins are provided to synchronize switching to a clock, or to another NCV891x34. The NCV891x34 also provides several protection features expected in automotive power supply systems such as current MARKING DIAGRAM limit, short circuit protection, and thermal shutdown. In addition, the high switching frequency produces low output voltage ripple even 891x34 when using small inductor values and an allceramic output filter XX ALYW capacitor forming a spaceefficient switching regulator solution. Features 891x34XX = Specific Device Code 40 A Iq in Light Load Condition x = 2, 3 2.0 A Maximum Output Current in PWM Mode in NCV891234 XX = 33, 50 A = Assembly Location 3.0 A Maximum Output Current in PWM Mode in NCV891334 L = Wafer Lot Internal Nchannel Power Switch Y = Year V Operating Range 3.7 V to 36 V, Withstands Load Dump to 45 V W = Work Week IN = PbFree Device Logic Level Enable Pin can be Tied to Battery (Note: Microdot may be in either location) Fixed Output Voltage of 5.0 V or 3.3 V with 2% Accuracy 2 MHz Freerunning Switching Frequency Input and Output Synchronization Pins PIN CONNECTIONS NCV Prefix for Automotive Requiring Site and Control Changes VIN 1 SW Wettable Flanks DFN (pin edge plating) These Devices are PbFree and are RoHS Compliant VIN2 BST DRV VOUT Typical Applications SafetyVision Systems SYNCO EN Audio, Infotainment RSTB SYNCI Instrumentation GND FLTB CDRV Telematics DBST (Top View) VIN NCV891x34 VOUT L1 VIN SW CBST CIN DFW COUT VIN2 BST ORDERING INFORMATION VOUT DRV See detailed ordering and shipping information on page 10 of SYNCO this data sheet. SYNCO EN ENABLE RESET RSTB SYNCI SYNCI GND FLTB FAULT Figure 1. Application Schematic Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: June, 2016 Rev. 0 NCV891334/DNCV891234, NCV891334 CDRV DBST VIN VIN SW L1 VOUT VIN2 CIN CBST 3.3 V DFW COUT Reg Low PWM DRV Oscillator LOGIC BST ON OFF Enable Sync Sync VOUT Out In + + + SYNCO SYNCO comp 2A, 3A EN EN detector + TSD SoftStart SYNCI SYNCI RESET VOLTAGES MONITORS RESET RSTB Switcher Supply ON LINEAR REGULATOR ON OVLD MODE SELECTION + GND Logic FLTB FAULT Fault Detection NCV891234, NCV891334 Figure 2. Simplified Block Diagrams www.onsemi.com 2 + +