NCV890130: Automotive Switching Regulator, 1.2 A, 2 MHz, 45 V Load Dump

The NCV890130 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 NCV890130 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 NCV890130 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

2 MHz Free-running Switching Frequency
Internal N-Channel Power Switch
Low VIN Operation Down to 4.5 V
High VIN Operation 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)

Benefits

Enables to use small size, low cost inductor and EMC filter
Fewer external components
Maintains operation during battery transients
Maintains operation during battery transients
Protects the load from load dump
Flexible enable
Protects against over current faults
Protects against short circuits on the output
Highly accurate regulation.
Suitable for a wide range of applications
Limits inrush current
Thermally protects IC

Applications

Audio
Infotainment
Safety - Vision Systems
Instrumentation

End Products

Automotive

Design & Development Tools (1)

Document Title	Document ID/Size	Revision	Revision Date
NCV890100/01/30/31 Design Worksheet - Continuous Conduction Mode	NCV8901_00_01_30_31 design sheet (203kB)	2	Nov, 2014

Package Drawings (2)

Document Title	Document ID/Size	Revision
DFN8, 3x3, 0.65P	506BY (56.5kB)	A
SOIC-8 EP	751AC (33.6kB)	B

Simulation Models (4)

Document Title	Document ID/Size	Revision	Revision Date
Average model for ac simulation on PSPICE	NCV8901XX_AC_PSPICE (220kB)	1
Average model for fast transient simulations on PSPICE (no switching)	NCV8901XX_TRANAVG_PSPICE (246kB)	1
NCV890100 switching model for PSPICE	NCV890100_SPICE (11.0kB)	0
average model for AC simulation on Spice simulators (other than Pspice)	NCV8901xx_SPICE_AC_AVG (194kB)	3.1	Sep, 2014

Data Sheets (1)

Document Title	Document ID/Size	Revision	Revision Date
1.2 A, 2 MHz Automotive Buck Switching Regulator	NCV890130/D (146kB)	3	Oct, 2014

Evaluation Board Documents (4)

Document Title	Document ID/Size	Revision	Revision Date
NV890130PDR2GEVB Bill of Materials ROHS Compliant	NV890130PDR2GEVB_BOM_ROHS.PDF (40.0kB)	0
NV890130PDR2GEVB Gerber Layout Files (Zip Fomat)	NV890130PDR2GEVB_GERBER.ZIP (50.0kB)	0
NV890130PDR2GEVB Schematic	NV890130PDR2GEVB_SCHEMATIC.PDF (138.0kB)	0
NV890130PDR2GEVB Test Procedure	NV890130PDR2GEVB_TEST_PROCEDURE.PDF (121.0kB)	0

Evaluation/Development Tool Information

Product	Status	Compliance	Short Description
NV890130PDR2GEVB	Active	Pb-free	Fixed-Frequency Monolithic Buck Switching Regulator Evaluation Board

Order Information

Product	Status	Compliance	Package		MSL*	Container		Budgetary Price/Unit
NCV890130MWTXG	Active	AEC Qualified PPAP Capable Pb-free	DFN-8	506BY	1	Tape and Reel	3000	$1.125
NCV890130PDR2G	Active	AEC Qualified PPAP Capable Pb-free	SOIC-8 EP	751AC	2	Tape and Reel	2500	$1.5