L4949-06 Datasheet, PDF (1/10 Pages) ON Semiconductor – 100 mA, 5.0 V, Low Dropout Voltage Regulator with Power−On Reset

L4949, NCV4949
100 mA, 5.0 V, Low Dropout
Voltage Regulator with
Power−On Reset
The L4949 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.
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 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
• NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
• Pb−Free Packages are Available
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
http://onsemi.com
MARKING DIAGRAMS
8
1
PDIP−8
N SUFFIX
CASE 626
8
L4949N
AWL
YYWWG
1
8
1
SOIC−8
D SUFFIX
CASE 751
8
L4949
ALYWD
G
1
20
20
1
SOIC−20W
DW SUFFIX
CASE 751D
1
L4949DW
AWLYYWWG
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Device
PIN CONNECTIONS
V_CC 1
S_i 2
V_Z 3
C_T 4
8 V_out
7 S_o
6 Reset
5 GND
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
© Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 9
Publication Order Number:
L4949/D