L4993 Datasheet, PDF (1/30 Pages) STMicroelectronics – Low drop voltage regulator

L4993
Low drop voltage regulator
Features
Max DC supply voltage
V_S
Max output voltage tolerance
∆V₀
Max dropout voltage
V_dp
Output current
I₀
Quiescent current
I_qn
1. Typical value with watchdog disabled.
40V
+/-2%
400 mV
150 mA
79 µA⁽¹⁾
■ Operating DC supply voltage range 5.6V to
31V
■ Reset circuit sensing the output voltage down
to 1V
■ Programmable reset pulse delay with external
capacitor
■ Watchdog
■ Programmable watchdog timer with external
capacitor
■ Enable input for enabling/disabling the
watchdog functionality
■ Thermal shutdown and short circuit protection
■ Wide temperature range (T_j = -40°C to 150°C)
SO-8
SO-20
Description
The L4993 is a monolithic integrated 5V Voltage
regulator with a low drop voltage at currents up to
150mA.The output voltage regulating element
consists in a p-channel MOS and the regulation is
performed regardless of input voltage transients
up to 40V. The high precision of the output voltage
is obtained with a pre-trimmed reference voltage.
The L4993 is protected against short circuit and
an over-temperature protection switches off the
device in case of extremely high power dissipa-
tion. The L4993 watchdog is active when the
Enable is high. State of the art features like reset
and watchdog make this device particularly
suitable to supply microprocessor systems in
automotive applications.
Table 1. Device summary
Package
SO-8
SO-20 (16+2+2)
Tube
L4993D
L4993MD
Order codes
Tape & reel
L4993DTR
L4993MDTR
April 2008
Rev 6
1/30
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