NCV4949A Datasheet, PDF (1/9 Pages) ON Semiconductor – 100 mA, 5.0 V, Low Dropout Voltage Regulator with Reset and Sense

NCV4949A
100 mA, 5.0 V, Low Dropout
Voltage Regulator with
Reset and Sense
The NCV4949A is a monolithic integrated 5.0 V voltage regulator
with a very low dropout and additional functions such as reset and an
uncommitted voltage sense comparator.
It is designed for supplying microcontroller/microprocessor
controlled systems particularly in automotive applications. The
NCV4949A has improved reset behavior for lower input and output
voltage levels.
Features
 Operating DC Supply Voltage Range 5.0 V to 28 V
 Transient Supply Voltage Up to 40 V
 Extremely Low Quiescent Current in Standby Mode
 High Precision Output Voltage 5.0 V 1%
 Output Current Capability Up to 100 mA
 Very Low Dropout Voltage Less Than 0.4 V
 Reset Circuit Sensing The Output Voltage
 Programmable Reset Pulse Delay
 Voltage Sense Comparator
 Thermal Shutdown and Short Circuit Protections
 NCV Prefix for Automotive and Other Applications Requiring Site
and Change Control
 These are Pb--Free Devices
Supply
Voltage (V_CC)
1
Output
Voltage (V_out)
V_Z 3
8
C_T 4
Preregulator
6.0 V
2.0 mA
Sense
Input
(S_i)
2
Regulator
V_s
1.23 V_ref
Reset
+
-- ^{2.0 V}
+
--
Sense
1.23 V
Reset
6
Sense
Output
(S_o)
7
5 GND
Figure 1. Representative Block Diagram
http://onsemi.com
8
1
A
L
Y
W
G
MARKING DIAGRAM
SOIC--8
D SUFFIX
CASE 751
8
V4949A
ALYWD
G
1
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb--Free Device
PIN CONNECTIONS
V_CC 1
S_i 2
V_Z 3
C_T 4
(Top View)
8 V_out
7 S_o
6 Reset
5 GND
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
 Semiconductor Components Industries, LLC, 2010
1
June, 2010 -- Rev. 0
Publication Order Number:
NCV4949A/D