L387A ,VERY LOW DROP 5V REGULATOR WITH RESETL387AVERY LOW DROP 5V REGULATOR WITH RESET. PRECISE OUTPUT VOLTAGE (5 V ± 4 %). VERY LOW DROPOUT VO ..
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L387A
VERY LOW DROP 5V REGULATOR WITH RESET
L387 AOctober 1991
VERY LOW DROP 5V REGULATOR WITH RESET PRECISE OUTPUT VOLTAGE (5 V ± 4 %). VERY LOW DROPOUT VOLTAGE. OUTPUT CURRENT IN EXCESS OF 500mA. POWER-ON, POWER-OFF INFORMATION
(RESET FUNCTION). HIGH NOISE IMMUNITY ON RESET DELAY
CAPACITOR
The L387A is a very low drop voltage regulator in
a Pentawatt® package specially designed to pro-
vide stabilized 5V supplies in consumer and in-
dustrial applications. Thanks to its very low in-
put/output voltage drop this device is very useful
in battery powered equipment, reducing con-
sumption and prolonging battery life. A reset out-
put makes the L387A particularly suitable for mi-
croprocessor systems. This output provides a re-
set signal when power is applied (after an exter-
nal programmable delay) and goes low when
DESCRIPTIONpower is removed, inhibiting the microprocessor.
An hysteresis on reset delay capacitor raises the
immunity to the ground noise.
APPLICATION CIRCUIT
ABSOLUTE MAXIMUM RATINGS1/6
PIN CONNECTION (Top views)
THERMAL DATA
BLOCK DIAGRAM
L387A2/6
ELECTRICAL CHARACTERISTICS (refer to the test circuit, Vi = 14.4 V, Tj = 25 °C, Co = 100 μF;
unless otherwise specified)
(*) For a DC voltage 26 < Vi < 37 V the device is not operating.
(**) Design limits are guaranteed (but not 100 % production tested) over the indicated temperature and supply voltage ranges.
These limits are not used to calculate outgoing quality levels.
L387A3/6
Figure 1 : Dropout Voltage vs. Output Current.
Figure 2 : Quiescent Current vs. Output
Current.
Figure 3 : Output Voltage vs. Temperature.
L387A4/6
PENTAWATT PACKAGE MECHANICAL DATA
L387A5/6
. However, SGS-THOMSON Microelectronics assumes no responsibility for
the 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 SGS-THOMSON Microelectronics. Specifica-
tions mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information pre-
viously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of SGS-THOMSON Microelectronics.
PENTAWATT® is registered trademarks of SGS-THOMSON Microelectronics
© 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore -
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L387A6/6
