L4947PD STMicroelectronics, L4947PD Datasheet

IC REG LDO W/RESET 20 PSOIC

L4947PD

Manufacturer Part Number
L4947PD
Description
IC REG LDO W/RESET 20 PSOIC
Manufacturer
STMicroelectronics
Datasheet

Specifications of L4947PD

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
Surface Mount
Package / Case
PowerSO-20 Exposed Bottom Pad
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Limit (min)
-
Other names
497-1405-5

Available stocks

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Quantity
Price
Part Number:
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Part Number:
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Quantity:
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L4947PD @@@@@
Manufacturer:
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Part Number:
L4947PD013TR
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June 2000
DESCRIPTION
The L4947PD is a monolithic integrated circuit in
HiPSO package specially designed to provide a
stabilized supply voltage for automotive and in-
dustrial 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
BLOCK DIAGRAM
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
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
1-20
17
INPUT
PROTECT.
5V-0.5A VERY LOW DROP REGULATOR WITH RESET
®
DUMP
START
REF.
PROTECTION
THERMAL
4%)
2
DELAY CAPACITOR
CIRCUIT
RESET
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
the device particularly suited to supply microproc-
essor 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 microproc-
essor.
ERROR
AMP.
ORDERING NUMBER: L4947PD
PNP OUTPUT
TRANSISTOR
PowerSO20
CURRENT
OUTPUT
LIMITER
ANTI
SAT.
L4947PD
D94AT106
GROUND
OUTPUT
OUTPUT
RESET
3
19
1-20
1/6

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L4947PD Summary of contents

Page 1

... SHORT CIRCUIT PROTECTION AND THER- MAL SHUT-DOWN (with hysteresis) LOW START UP CURRENT DESCRIPTION The L4947PD is a monolithic integrated circuit in HiPSO package specially designed to provide a stabilized supply voltage for automotive and in- dustrial electronic systems. Thanks to its very low voltage drop, in automotive applications the ...

Page 2

... DELAY CAP OUT GND 10 11 D94AT107A Parameter 17 3 100nF L4947PD 2 19 100nF 1-20 R (pull up resistor) and R (load) are both equal Value 35 – – 80 100 35 – 150 GND RESET N. N.C. N.C. N.C. N.C. N.C. GND Value Max 3 OUT ...

Page 3

... For a DC voltage 26 < V < 37V the device is not operating i FUNCTIONAL DESCRIPTION The L4947PD is a very low drop 5V/0.5A voltage regulator provided with a reset function and there- fore particularly suited to meet the requirements of supplying the microprocessor systems used in automotive and industrial applications. ...

Page 4

... Load dump and field decay protections ( 80V), reverse voltage (– 18V) and short circuit protec- tion, thermal shutdown are the main features that make the L4947PD specially suitable for applica- tions in the automotive enviroment. EXTERNAL COMPENSATION threshold V O ...

Page 5

... A e DETAIL BOTTOM VIEW PSO20MEC OUTLINE AND MECHANICAL DATA JEDEC MO-166 PowerSO20 DETAIL A lead slug a3 DETAIL B 0.35 Gage Plane - SEATING PLANE (COPLANARITY L4947PD 5/6 ...

Page 6

... L4947PD Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice ...

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