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NCV890131 Datasheet

2MHz Automotive Buck Switching Regulator

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NCV890131
1.2 A, 2 MHz Automotive
Buck Switching Regulator
The NCV890131 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 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.
www.onsemi.com
MARKING DIAGRAM
DFN10
CASE 485C
V8901
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 VIN Operation Down to 4.5 V
High VIN Operation to 36 V
Withstands Load Dump to 45 V
2 MHz Free−running Switching Frequency
Auto−synchronizes with Other NCV890131 or to an
External Clock
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)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
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
NCV890131
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
February, 2015 − Rev. 3
1
Publication Order Number:
NCV890131/D


  ON Semiconductor Electronic Components Datasheet  

NCV890131 Datasheet

2MHz Automotive Buck Switching Regulator

No Preview Available !

VIN
CIN
VIN
DRV
Sync Out SYNCO
GND
Enable
EN
NCV890131
3V
Reg
Oscillator
Sync
Out In
++S
PWM
LOGIC
ON OFF
1.2 A
+
TSD
VOLTAGES
MONITORS
Soft−Start
RESET
+
CDRV
SW
DBST
L1
VOUT
CBST
BST
DFW
COUT
SYNCI Sync In
FB
COMP
RCOMP
CCOMP
Figure 2. NCV890131 Block Diagram
www.onsemi.com
2


Part Number NCV890131
Description 2MHz Automotive Buck Switching Regulator
Maker ON Semiconductor
Total Page 19 Pages
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