NCV891330 Datasheet, PDF (1/18 Pages) ON Semiconductor – Dual- Mode Step-Down Regulator

NCV891330
3 A, 2 MHz Low-I_Q Dual-
Mode Step-Down Regulator
for Automotive
The NCV891330 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 NCV891330 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
• 30 mA Iq in Light Load Condition
• 3.0 A Maximum Output Current in PWM Mode
• Internal N−channel Power Switch
• V_IN 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, 4.0 V, 3.8 V or 3.3 V
• 2 MHz Free−running Switching Frequency
• ±2 % Output Voltage Accuracy
• NCV Prefix for Automotive Requiring Site and Control Changes
• These Devices are Pb−Free and are RoHS Compliant
Typical Applications
• Audio
• Infotainment
• Instrumentation
• Safety−Vision Systems
VIN
CIN
RESET
CDRV
NCV891330
VIN
DRV
SW
CBST
BST
RSTB VOUT
GND
EN
DBST
L1
DFW
EN
Figure 1. Typical Application
VOUT
COUT
www.onsemi.com
8
1
SOIC−8
EXPOSED PAD
CASE 751AC
MARKING DIAGRAM
8
891330XX
ALYW
G
1
With XX = 33 for 3.3 V Output
= 38 for 3.8 V Output
= 40 for 4.0 V Output
= 50 for 5.0 V Output
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Device
PIN CONNECTIONS
VIN 1
8 SW
DRV 2
7 BST
RSTB ³
6 VOUT
GND 4
(Top View)
5 EN
ORDERING INFORMATION
See detailed ordering and shipping information on page 17 of
this data sheet.
© Semiconductor Components Industries, LLC, 2015
1
July, 2015 − Rev. 2
Publication Order Number:
NCV891330/D