NCV4949ADR2G データシートの表示（PDF） - ON Semiconductor
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NCV4949ADR2G Datasheet PDF : 11 Pages
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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
• 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 (VCC)
1
Output
Voltage (Vout)
VZ 3
8
CT 4
Preregulator
6.0 V
Sense
Input
(Si)
2
Regulator
Vs
1.23 Vref
2.0 mA
Reset
+
- 2.0 V
+
-
Sense
1.23 V
Reset
6
Sense
Output
(So)
7
5 GND
Figure 1. Representative Block Diagram
http://onsemi.com
8
1
8
1
SOIC−8
D SUFFIX
CASE 751
MARKING
DIAGRAMS
8
V4949A
ALYWD
G
1
8
SOIC−8 EP
PD SUFFIX
CASE 751AC
V4949A
ALYWG
G
1
20
SOIC−20 W
DW SUFFIX
CASE 751AC
NCV4949A
AWLYYWWG
1
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Device
(Note: Microdot may be in either location)
PIN CONNECTIONS
VCC 1
Si 2
VZ 3
CT 4
(Top View)
8 Vout
7 So
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
November, 2010 − Rev. 1
Publication Order Number:
NCV4949A/D
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