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STMicroelectronics Electronic Components Datasheet

L4993 Datasheet

Low drop voltage regulator

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L4993 pdf
L4993
Low drop voltage regulator
Features
Max DC supply voltage
Max output voltage tolerance
Max dropout voltage
Output current
Quiescent current
VS
V0
Vdp
I0
Iqn
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 (Tj = -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
www.st.com
30
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STMicroelectronics Electronic Components Datasheet

L4993 Datasheet

Low drop voltage regulator

No Preview Available !

L4993 pdf
Contents
Contents
L4993
1 Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5 Test circuit and waveforms plot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.5.1 Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3 Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4 Package and PCB thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1 SO-8 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2 SO-20 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 Package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.1 ECOPACK® packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3 SO-20 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.4 SO-8 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5 SO-20 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2/30
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Part Number L4993
Description Low drop voltage regulator
Maker STMicroelectronics
Total Page 30 Pages
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