NCV890231 Datasheet, PDF (1/19 Pages) ON Semiconductor – 2.0 A, 2 MHz Automotive Buck Switching Regulator

NCV890231
2.0 A, 2 MHz Automotive
Buck Switching Regulator
The NCV890231 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 NCV890231 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
NCV890231. The NCV890231 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.
www.onsemi.com
MARKING DIAGRAM
DFN10
CASE 485C
V8902
31
ALYWG
G
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Device
(Note: Microdot may be in either location)
Features
• Internal N−Channel Power Switch
• Low V_IN Operation Down to 4.5 V
• High V_IN Operation to 36 V
• Withstands Load Dump to 45 V
• 2 MHz Free−running Switching Frequency
• Auto−synchronizes with Other NCV890231 or to an
External Clock
• Logic level Enable Input Can be Directly Tied to
Battery
• 2.2 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
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
• 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
VIN
CIN
SYNC
OUT
EN
CDRV
NCV890231
DBST
1 VIN
SW 10
2 DRV
BST 9
3 SYNCO SYNCI 8
CBST
SYNC IN
L1
DFW
RFB1
4 GND
FB 7
5 EN COMP 6
RCOMP
CCOMP
VOUT
COUT
RFB2
Figure 1. Typical Application
© Semiconductor Components Industries, LLC, 2015
1
February, 2015 − Rev. 2
Publication Order Number:
NCV890231/D