Converters | NCV891334

Step-Down Regulator, Dual-Mode, 2 MHz Low-IQ

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Overview

The NCV891x34 is a Dual Mode regulator intended for Automotive, battery−connected applications that must operate with up to a 45 V input supply. Hybrid Low Power Mode allows the NCV891x34 to operate either as a PWM Buck Converter or as a Low Drop−Out LinearRegulator, and the NCV891x34 is suitable for systems with Low Noise and Low Quiescent Current requirements often encountered inautomotive driver information systems. A reset (with fixed delay) and a fault pin (flagging low input voltage and high temperature warnings) simplify interfacing with a microcontroller.

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 limit, short circuit protection, and thermal shutdown. In addition, the high switching frequency produces low output voltage ripple even when using small inductor values and an all−ceramic output filter capacitor – forming a space−efficient switching regulator solution.

  • Safety Vision Systems
  • Audio, Infotainment
  • Instrumentation
  • Telematics

  • Automotive

  • 40 µA Iq in Light Load Condition
  • 3.0 A Maximum Output Current in PWM Mode in NCV891334
  • Internal N−channel Power Switch
  • VIN Operating Range 3.7 V to 36 V, Withstands Load Dump to 45 V
  • Logic Level Enable Pin can be Tied to Battery
  • Fixed Output Voltage of 5.0 V or 3.3 V with ±2% Accuracy
  • 2 MHz Free−running Switching Frequency
  • Input and Output Synchronization Pins
  • NCV Prefix for Automotive Requiring Site and Control Changes
  • Wettable Flanks DFN (pin edge plating)
  • These Devices are Pb−Free and are RoHS Compliant

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NCV891334MW33R2G

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CAD Model

Pb

A

H

P

DFN-12

506CE

1

260

REEL

3000

N

Step-Down

Current Mode

3.7

45

3.3

3

85

2000

Price N/A

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Reliability Data

Die Related Summary Data

Device: NCV891334MW33R2G

Equivalent to wafer fab process: BP STD LINEAR

Product Technology

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Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

BP STD LINEAR

10

12120914040

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Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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