NCV890131 Series

Automotive Buck Switching Regulator, 1.2 A, 2 MHz, 45 V Load Dump, Sync In and Sync Out

Catalog

Automotive Buck Switching Regulator, 1.2 A, 2 MHz, 45 V Load Dump, Sync In and Sync Out

Part	Voltage - Input (Max) [Max]	Qualification	Synchronous Rectifier	Output Type	Package / Case	Grade	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Current - Output	Supplier Device Package	Number of Outputs	Frequency - Switching	Output Configuration	Mounting Type	Topology	Voltage - Output (Max) [Max]	Function
ON Semiconductor NCV890131MWTXG	36 V	AEC-Q100		Adjustable	10-VFDFN Exposed Pad	Automotive	150 °C	-40 °C	4.5 V	0.8 V	1.2 A	10-DFN (3x3)	1	2 MHz	Positive	Surface Mount	Buck	34 V	Step-Down

Catalog

Automotive Buck Switching Regulator, 1.2 A, 2 MHz, 45 V Load Dump, Sync In and Sync Out

Key Features

• 2 MHz Free-running Switching Frequency

• Internal N-Channel Power Switch

• Low VINOperation Down to 4.5 V

• High VINOperation to 32 V

• Withstands Load Dump to 45 V

• 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 ms Internal Soft-Start

• Thermal Shutdown (TSD)

• Auto-synchronizes with Other NCV890101 or to an External Clock

Description

The NCV890131 is a fixed-frequency, monolithic, Buck switching regulator intended for Automotive, battery-connected applications that must operate with up to a 32 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 NCV890131 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. Two pins are provided to synchronize switching to a clock, or to another NCV890131. The NCV890131 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.