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Voltage Regulator. L487 Datasheet

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Voltage Regulator. L487 Datasheet
















L487 Regulator. Datasheet pdf. Equivalent













Part

L487

Description

Very Low Drop 5V Voltage Regulator



Feature


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Manufacture

SGS-Ates

Datasheet
Download L487 Datasheet


SGS-Ates L487

L487; .


SGS-Ates L487

.


SGS-Ates L487

.





Part

L487

Description

Very Low Drop 5V Voltage Regulator



Feature


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Manufacture

SGS-Ates

Datasheet
Download L487 Datasheet




 L487
SGS
®
L487
VERY LOW DROP 5V VOLTAGE REGULATOR
WITH RESET
PRECISE OUTPUT VOLTAG E (5V ± 4% )
VERY LOW DROPOUT VOLTAGE
OUTPUT CURRENT IN EXCESS OF 500mA
POWER-ON, POWER-OF F INFOR MATION
( RESET FUNCTI ON)
+80/–80V LOAD DUMP PROTECTION
OVERVOLTAGE AND REVERSE VOLTAG E
PROTECTION
SHORT CIRCUIT PROTECTION AND
THERMAL SHUT-DOWN
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 the device
particularly suited to su pply microprocessor based
systems: a pulse is available (after an externally
programmable delay) to reset the microprocessor
at power-on phase; at power-off, this pulse
becomes low inhibiting the microprocessor.
The L487 is a monolithic integrated circuit in
Pentawatt® package specially designed to provide
a stabilized supply voltage for automotive and
industrial electronic system. Thanks to its very low
voltage drop in automotive applications the L487
Pentawatt®
ORDERING NUMBER: L487
ABSOLUTE MAXIMUM RATINGS
Vi
Vi
Top
Tstg
Forward input voltage
Reverse input voltage
Positive transient peak voltage (t = 300ms)
Negative transient peak voltage (t = 100ms)
Operating junction temperature
Storage temperature
35
–18
80
–80
–40 to 150
–55 to 150
V
V
V
V
ºC
ºC
TEST ClRCUIT
* Min. 33µF and max. ESR 3over temperature range
No longer manufactured, to purchase see - www.procontechnology.com.au Phone: (03) 98306288




 L487
SGS
®
CONNECTION DIAGRAM (top view)
BLOCK DIAGRAM
L487
Fig.1 - Dropout voltage vs.
output current
Fig.2 - Quiescent current vs.
output current
Fig.3 - Output voltage vs.
temperature
THERMAL DATA
Rth j-case
Thermal resistance junction-case
max 4 °C/W
No longer manufactured, to purchase see - www.procontechnology.com.au Phone: (03) 98306288




 L487
SGS
®
L487
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Vi = 14.4V, Tamb = 25°C, unless
otherwise specified)
Sym bol
Vo
Vi
Vo
Vo
Vi – Vo
Iq
Param eter
Output Voltage
Operating Input Voltage
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Vo
T
SVR
Temperature Output
Voltage Drift
Supply Voltage Rejection
ISC Output Short Circuit
Current
VR Reset Output Voltage
IR Reset Output Leakage
Current
td Delay Time for Reset
Output
VR T(o ff )
IC4
VR T(o n )
Reset Threshold (delay
charging current on)
Charging Current
(current generator)
Reset Threshold (low)
V4 Comparator Threshold
(pin 4)
Test Conditions
Io = 5mA to 500mA
(*) See note
Vi = 6V to 26V Io = 5mA
Io = 5mA to 500mA
Io = 500mA
Io = 0mA
Io = 150mA
Io = 500mA
Vi = 6.2 V
Io = 500mA
Min.
4.80
Typ.
5.00
5
15
0.6
6
20
130
–0.5
Max.
5.20
28
50
60
0.8
15
40
210
250
Unit
V
V
mV
mV
V
mA
mA
mV/ºC
Io = 350 mA
Co = 100µF
f = 120 Hz
Vi = 12V ± 5Vpp
IR = 1 6 mA
Vo 4.75V
Vo in Regulation
55 dB
0.8 A
0.8 V
50 µA
Cd = 100nF
30 ms
4.75 Vo–0.15 Vo–0.04
V
10 27
VR T(o ff )
–10m V
3.6 3.95
µA
V
V
* For a DC input voltage 28 < Vi < 35V the device is not operating
For dimensional information on the Pentawatt package see the L387A data sheet. For more information
on this device see the SGS-Thomson Microelectronics Application Note: ‘Low Drop Voltage Regulators
for Automotive Electronics’ by S.Ciscato.
This device can be used as a replacement for L387A, L4947, LM2927T, L78MR05 or 4848 (in house
part number with ‘SGS 88719’ printed on it)
No longer manufactured, to purchase see - www.procontechnology.com.au Phone: (03) 98306288




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