Order this document from L4949/D
Advanced Information Multifunction Very Low Dropout Voltage Regulator
The L4949 is a m...
Order this document from L4949/D
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
L4949
MULTIFUNCTION VERY LOW DROPOUT VOLTAGE
REGULATOR
SILICON MONOLITHIC INTEGRATED CIRCUIT
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
8 1
N SUFFIX PLASTIC PACKAGE CASE 626
8 1
D SUFFIX PLASTIC PACKAGE CASE 751
Representative Block Diagram
Output Voltage (Vout) VZ 3 8 Supply Voltage (VCC) 1 Pre
regulator 6.0 V CT 4
PIN CONNECTIONS
VCC 1
2.0 µA Reset 6 + – Reset
8 7 6 5
Vout So Reset Gnd
Si VZ CT
2 3 4
Regulator Sense Input (Si) 2 Vs
2.0 V Sense Output (So) 7
(Top View)
+ – 1.23 Vref Sense
1.23 V
ORDERING INFORMATION
Device Operating Temperature Range TJ = –40° to +125°C Package DIP–8 SO–8
Rev 0
5
Gnd
L4949N L4949D
This document contains information on a new product. Specifications and informatio...