L4945

Number of Outputs : 1
Maximum Operating Temperature : + 125 C
Output Voltage : 5 V
Output Type : Fixed
Mounting Style : Through Hole
Package / Case : TO-220
Output Current : 500 mA
Input Voltage MAX : 26 V
Load Regulation : 60 mV
Dropout Voltage (Max) : 0.55 V at 500 mA


Features:

`5V ± 4% PRECISE OUTPUT VOLTAGE OVER FULL TEMPERATURE RANGE ( 40 / 125 °C)
`VERY LOW VOLTAGE DROP (0.75Vmax) OVER FULL TEMPERATURE RANGE
`OUTPUT CURRENT UP TO 500mA
`OVERVOLTAGE AND REVERSE VOLTAGE PROTECTIONS
`REVERSE VOLTAGEPROTECTION
`SHORT CIRCUIT PROTECTION AND THERMAL SHUT-DOWN (with hysteresis)
`LOW START UP CURRENT


Specifications

Symbol	Parameter	Value	Unit
Vi	DC Input Voltage DC Reverse Input Voltage Transient Input Overvoltages : Load Dump : 5ms trise 10ms tf Fall Time Constant = 100ms RSOURCE 0.5 Field Decay : 5ms tfall 10ms, RSOURCE10 tr Rise Time Constant = 33ms Low Energy Spike : trise = 1ms, tfall = 500ms, RSOURCE10 fr Repetition Frequency = 5Hz	35 -18 80   -80 ± 100	V V V   V V
TJ	Junction Temperature Range	40 to 150	°C
TOP	Operating Temperature Range	40 to 125	°C
Tstg	Storage Temperature Range	55 to 150	°C

Description

The L4945 is a monolithic integrated circuit in Versawatt package specially designed to provide a stabilized supply voltage for automotive and industrial electronic systems. Thanks to their very low voltage drop, in automotive applications L4945 can work correctly even during the cranking phase, when the battery voltage could fall as low as 6V. Furthermore, they incorporate a complete range of protection circuits against the dangerous overvoltages always present on the battery rail of the car.

Parameters:

Technical/Catalog Information	L4945
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Regulator Type	Single Output
Package / Case	TO-220-3 (Straight Leads)
Packaging	Tube
Regulator Topology	Positive Fixed
Current - Output	500mA
Voltage - Output	5V
Operating Temperature	-40°C ~ 125°C
Voltage - Input	6 ~ 26 V
Number of Regulators	1
Current - Limit (Min)	-
Current Short Circuit (Isc)	500mA
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	L4945 L4945 497 3629 ND 4973629ND 497-3629