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Motorola Inc - MULTIFUNCTION VERY LOW DROPOUT VOLTAGE REGULATOR

Numéro de référence L4949
Description MULTIFUNCTION VERY LOW DROPOUT VOLTAGE REGULATOR
Fabricant Motorola Inc 
Logo Motorola  Inc 





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L4949 fiche technique
Advanced Information
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
This document contains information on a new product. Specifications
and information herein are subject to change without notice.
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
PIN CONNECTIONS
Reset
6
Sense
Output
(So)
7
VCC 1
Si 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. 1997
Rev 0

PagesPages 8
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