The NCV890100 is a fixed−frequency, monolithic, Buck switching

regulator intended for Automotive, battery−connected applications

that must operate with up to a 36 V input supply. The regulator is

suitable for systems with low noise and small form factor

requirements often encountered in automotive driver information

systems. The NCV890100 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

constant switching frequency above the sensitive AM band,

eliminating the need for costly filters and EMI countermeasures. The

NCV890100 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.

Features

• Internal N−Channel Power Switch

• Low VIN Operation Down to 4.5 V

• High VIN Operation to 36 V

• Withstands Load Dump to 40 V

• 2 MHz Free−running Switching Frequency

• Logic Level Enable Input Can be Directly Tied to Battery

• 1.4 A (min) Cycle−by−Cycle 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 Soft−Start

• Thermal Shutdown (TSD)

• Low Shutdown Current

• Wettable Flanks DFN

• NCV Prefix for Automotive and Other Applications Requiring

Unique Site and Control Change Requirements; AEC−Q100

Qualified and PPAP Capable

• These Devices are Pb−Free and are RoHS Compliant

Applications

• Audio

• Infotainment

• Safety − Vision Systems

• Instrumentation