L4947PD

Number of Outputs : 1
Maximum Operating Temperature : + 125 C
Mounting Style : SMD/SMT
Output Voltage : 5 V
Output Type : Fixed
Output Current : 500 mA
Input Voltage MAX : 26 V
Load Regulation : 60 mV
Dropout Voltage (Max) : 0.55 V
Package / Case : PowerSO-20


Pinout




Specifications

Symbol	Parameter	Value	Unit
V1	DC Input Voltage DC Reverse Input Voltage Transient Input Overvoltages : Load Dump : 5ms 3 trise 3 10ms tf Fall Time Constant = 100ms RSOURCE . 0.5W Field Decay : 5ms 3 tfall 3 10ms, RSOURCE . 10W tr Rise Time Constant = 33ms Low Energy Spike : trise = 1ms, tfall = 500ms, RSOURCE . 10W fr Repetition Frequency = 5Hz	35 18 80   80   ± 100 ± 100	V V V V V
VR	Reset Output Voltage	35	V
TJ,TSTG	Junction and Storage Temperature Range	55 to 150	°C

Description

The L4947PD is a monolithic integrated circuit in HiPSO package specially designed to provide a stabilized supply voltage for automotive and industrial electronic systems. Thanks to its very low voltage drop, in automotive applications the L4947PD can work correctly even during the cranking phase, when the battery voltage could fall as low as 6V. Furthermore, it incorporates a complete range of protection circuits against the dangerous overvoltages always present on the battery rail of the car. The reset function makes L4947PD particularly suited to supply microprocessor based systems : a signal is available (after an externally programmable delay) to reset the microprocessor at power-on phase ; at power-off, this signal becomes low inhibiting the microprocessor.

Parameters:

Technical/Catalog Information	L4947PD
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Regulator Type	Single Output
Package / Case	PowerSO-20 Exposed Bottom Pad
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	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	L4947PD L4947PD 497 1405 5 ND 49714055ND 497-1405-5