L4947H STMicroelectronics, L4947H Datasheet

IC REG LDO 5V W/REST PENTAWATT V

L4947H

Manufacturer Part Number
L4947H
Description
IC REG LDO 5V W/REST PENTAWATT V
Manufacturer
STMicroelectronics
Datasheet

Specifications of L4947H

Regulator Topology
Positive Fixed
Voltage - Output
5V
Voltage - Input
6 ~ 26 V
Voltage - Dropout (typical)
0.4V @ 500mA
Number Of Regulators
1
Current - Output
500mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
Pentawatt-5 (Horizontal, Bent and Staggered Leads)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Limit (min)
-
Other names
497-3630

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DESCRIPTION
The L4947/L4947R is a monolithic integrated cir-
cuit in Pentawatt 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 L4947/L4947R can work correctly even during
the cranking phase, when the battery voltage
BLOCK DIAGRAM
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
June 2000
PRECISE OUTPUT VOLTAGE (5V
OVER FULL TEMPERATURE RANGE
(– 40 / 125 C)
VERY LOW VOLTAGE DROP (0.75Vmax)
OVER FULL T RANGE
OUTPUT CURRENT UP TO 500mA
RESET FUNCTION
POWER-ON RESET DELAY PULSE DE-
FINED BY THE EXTERNAL CAPACITOR
+ 80V LOAD DUMP PROTECTION
– 80V LOAD DUMP PROTECTION
REVERSE VOLTAGE PROTECTION
SHORT CIRCUIT PROTECTION AND THER-
MAL SHUT-DOWN (with hysteresis)
LOW START UP CURRENT
5V-0.5A VERY LOW DROP REGULATOR WITH RESET
®
4%)
could fall as low as 6V. Furthermore, it incorpo-
rates a complete range of protection circuits
against the dangerous overvoltages always pre-
sent on the battery rail of the car. The reset func-
tion makes the device particularly suited to supply
microprocessor based systems : a signal is avail-
able (after an externally programmable delay) to
reset the microprocessor at power-on phase ; at
power-off, this signal becomes low inhibiting the
microprocessor.
ORDERING NUMBERS: L4947
Pentawatt
L4947R
L4947R
L4947
1/6

Related parts for L4947H

L4947H Summary of contents

Page 1

VERY LOW DROP REGULATOR WITH RESET PRECISE OUTPUT VOLTAGE (5V OVER FULL TEMPERATURE RANGE (– 125 C) VERY LOW VOLTAGE DROP (0.75Vmax) OVER FULL T RANGE OUTPUT CURRENT UP TO 500mA RESET FUNCTION POWER-ON RESET DELAY ...

Page 2

L4947 - L4947R ABSOLUTE MAXIMUM RATINGS Symbol V DC Input Voltage i DC Reverse Input Voltage Transient Input Overvoltages : Load Dump : 5ms t 10ms rise Fall Time Constant = 100ms f R 0.5 SOURCE Field Decay : 5ms ...

Page 3

ELECTRICAL CHARACTERISTICS (refer to the test circuit – Symbol Parameter V Output Voltage o V Operating Input Voltage i V Line Regulation o V Load Regulation o V ...

Page 4

L4947 - L4947R The current consumption of the device (quiescent current) is maximum 13mA - over full T - when no load current is required. The internal antisaturation circuit allows a drastic reduction in the current peak which takes place ...

Page 5

DIM. MIN. TYP. MAX. MIN. A 4.8 C 1.37 D 2.4 2.8 0.094 D1 1.2 1.35 0.047 E 0.35 0.55 0.014 E1 0.76 1.19 0.030 F 0.8 1.05 0.031 F1 1 1.4 0.039 G 3.2 3.4 3.6 0.126 G1 ...

Page 6

... This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. © 2000 STMicroelectronics – Printed in Italy – All Rights Reserved Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U ...

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