NCV891130
Step-Down Regulator -
Automotive, Low-Iq,
Dual-Mode
1.2 A, 2 MHz
www.onsemi.com
The NCV891130 is a Dual Mode regulator intended for Automotive,
battery−connected applications that must operate with up to a 45 V
input supply. Depending on the output load, it operates either as a PWM
Buck Converter or as a Low Drop−Out Linear Regulator, and is suitable
for systems with low noise and Low Quiescent Current requirements
often encountered in automotive driver information systems. A reset
pin (with fixed delay) simplifies interfacing with a microcontroller.
The NCV891130 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.
8
1
SOIC−8
EXPOSED PAD
CASE 751AC
MARKING DIAGRAM
8
891130XX
ALYW
G
Features
• 30 mA Iq in Light Load Condition
• 1.2 A Maximum Output Current in PWM Mode
• Internal N−channel Power Switch
1
With XX = 33 for 3.3 V Output
= 40 for 4.0 V Output
= 50 for 5.0 V Output
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Device
• V Operating Range 3.7 V to 36 V
IN
A
L
Y
W
G
• Withstands Load Dump to 45 V
• Logic Level Enable Pin can be Tied to Battery
• Fixed Output Voltage of 5.0 V, 4.0 V or 3.3 V
• 2 MHz Free−running Switching Frequency
•
2 % Output Voltage Accuracy
PIN CONNECTIONS
• NCV Prefix for Automotive Requiring Site and Control Changes
• These Devices are Pb−Free and are RoHS Compliant
1
8
7
6
5
VIN
SW
Typical Applications
• Audio
• Infotainment
• Instrumentation
• Safety−Vision Systems
2
3
4
DRV
BST
VOUT
EN
RSTB
GND
(Top View)
CDRV
DBST
NCV891130
L1
VOUT
COUT
VIN
VIN
SW
BST
ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of
this data sheet.
CBST
CIN
RESET
DFW
DRV
RSTB
GND
VOUT
EN
EN
Figure 1. Typical Application
© Semiconductor Components Industries, LLC, 2016
1
Publication Order Number:
August, 2019 − Rev. 1
NCV891130/D