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L4949D
100mA, 5V, 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 Pb−Free Package is Available Operating DC Supply V oltage Range 5.0 V to 28 V Transient Supply V oltage Up to 40 V Extremely Low Quiescent Current in Standby Mode High Precision Standby Output V oltage 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
Sense
Input
(Si)
Supply
Voltage (VCC)
Output
Voltage (Vout)
Figure 1. Representative Block Diagram
