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NCV891334MW33R2G Datasheet(PDF) 1 Page - ON Semiconductor

Part # NCV891334MW33R2G
Description  2 MHz Low-IQ Dual-Mode Step-Down Regulator
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2016
June, 2016 − Rev. 0
1
Publication Order Number:
NCV891334/D
NCV891234, NCV891334
2 MHz Low-IQ Dual-Mode
Step-Down Regulator for
Automotive
The NCV891x34 is a Dual Mode regulator intended for Automotive,
battery−connected applications that must operate with up to a 45 V
input supply. Hybrid Low Power Mode allows the NCV891x34 to
operate either as a PWM Buck Converter or as a Low Drop−Out Linear
Regulator, and the NCV891x34 is suitable for systems with Low Noise
and Low Quiescent Current requirements often encountered in
automotive driver information systems. A reset (with fixed delay) and
a fault pin (flagging low input voltage and high temperature warnings)
simplify interfacing with a microcontroller.
Two pins are provided to synchronize switching to a clock, or to
another NCV891x34. The NCV891x34 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
40 mA Iq in Light Load Condition
2.0 A Maximum Output Current in PWM Mode in NCV891234
3.0 A Maximum Output Current in PWM Mode in NCV891334
Internal N−channel Power Switch
VIN Operating Range 3.7 V to 36 V, Withstands Load Dump to 45 V
Logic Level Enable Pin can be Tied to Battery
Fixed Output Voltage of 5.0 V or 3.3 V with ±2% Accuracy
2 MHz Free−running Switching Frequency
Input and Output Synchronization Pins
NCV Prefix for Automotive Requiring Site and Control Changes
Wettable Flanks DFN (pin edge plating)
These Devices are Pb−Free and are RoHS Compliant
Typical Applications
Safety−Vision Systems
Audio, Infotainment
Instrumentation
Telematics
MARKING DIAGRAM
www.onsemi.com
DFN12
MW SUFFIX
CASE 506CE
PIN CONNECTIONS
See detailed ordering and shipping information on page 10 of
this data sheet.
ORDERING INFORMATION
(Top View)
1
891x34XX = Specific Device Code
x
= 2, 3
XX
= 33, 50
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Device
(Note: Microdot may be in either location)
891x34
XX
ALYW
G
G
SW
BST
VOUT
EN
SYNCI
FLTB
VIN
VIN2
DRV
SYNCO
RSTB
GND
1
Figure 1. Application Schematic
VIN
VIN2
SYNCO
VOUT
SW
BST
DRV
VIN
VOUT
CIN
CBST
DBST
DFW
COUT
L1
CDRV
NCV891x34
SYNCI
RESET
GND
FLTB
SYNCI
RSTB
FAULT
SYNCO
ENABLE
EN


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