L4949 Datasheet, PDF (1/8 Pages) Motorola, Inc – MULTIFUNCTION VERY LOW DROPOUT VOLTAGE REGULATOR

Multifunction Very Low
Dropout Voltage Regulator
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.
• 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
Order this document from L4949/D
L4949
MULTIFUNCTION
VERY LOW DROPOUT
VOLTAGE REGULATOR
SILICON MONOLITHIC
INTEGRATED CIRCUIT
8
1
N SUFFIX
PLASTIC PACKAGE
CASE 626
Supply
Voltage (VCC)
1
Representative Block Diagram
Output
Voltage (Vout)
VZ 3
8
CT 4
Preregulator
6.0 V
2.0 µA
Sense
Input
(Si)
2
Regulator
Vs
1.23 Vref
Reset
+
– ^{2.0 V}
+
–
Sense
1.23 V
5 Gnd
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
PIN CONNECTIONS
Reset
6
Sense
Output
(So)
7
V_CC 1
S_i 2
VZ 3
CT 4
8 Vout
7 So
6 Reset
5 Gnd
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
L4949N
L4949D
TJ = –40° to +125°C
DIP–8
SO–8
© Motorola, Inc. 1998
Rev 1