NCV4949DW Datasheet, PDF (1/12 Pages) ON Semiconductor – Low Dropout Voltage Regulator with Power-On Reset

NCV4949DW
100 mA, 5.0 V, Low Dropout
Voltage Regulator with
Power−On Reset
The NCV4949DW is a monolithic integrated 5.0 V voltage
regulator with a very low dropout and additional functions such as
power-on reset and input voltage sense.
It is designed for supplying the micro-computer controlled systems
especially in automotive applications.
• 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 Standby 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 with External Capacitor
• Voltage Sense Comparator
• Thermal Shutdown and Short Circuit Protections
http://onsemi.com
20
1
SO-20W
DW SUFFIX
CASE 751D
MARKING DIAGRAM
20
XXXXXXXXXXXX
XXXXXXXXXXXX
XXXXXXXXXXXX
AWLYYWW
1
X = Specific Device Code
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
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
5 Gnd
Figure 1. Representative Block Diagram
Reset
6
Sense
Output
(S_o)
7
PIN CONNECTIONS
V_Z 1
C_T 2
NC ³
GND ⁴
GND ⁵
GND 6
GND 7
NC 8
NC 9
RESET 10
(Top View)
20 S_l
19 V_S
18 _NC
17 _GND
16 _GND
15 GND
14 GND
13 NC
12 V_out
11 S_O
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
© Semiconductor Components Industries, LLC, 2002
1
November, 2002 - Rev. 1
Publication Order Number:
NCV4949DW/D