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L4989MD

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
This is information on a product in full production.
September 2013 Doc ID 022376 Rev. 2 1/19
1
L4989D
L4989MD
Low power voltage regulator
Datasheet production data
Features
■ Operating DC supply voltage range 5.6 V to
31 V
■ Very low quiescent current with watchdog
disabled
■ Precision output voltage (3%)
■ Low drop voltage (180 mV typ at I
o
=150mA)
■ Reset circuit sensing the output voltage down
to 1 V
■ Programmable reset delay with external
capacitor
■ Watchdog disable input
■ Programmable watchdog timer with external
capacitor
■ Thermal shutdown and short circuit protection
■ Wide temperature range (T
j
= -40°C to 150°C)
Description
The L4989M and L4989MD are monolithic
integrated 5 V voltage regulators with a low drop
voltage at currents up to 150 mA.
The output voltage regulating element consists in
a p-channel MOS and the regulation is performed
regardless of input voltage transients up to 40 V.
The high precision of the output voltage is
obtained with a pre-trimmed reference voltage.
The devices are protected against short circuit
and an overtemperature protection switches off
the devices in case of extremely high power
dissipation.
The L4989M and L4989MD watchdogs are active
when the Enable pin is high. Features like reset
and watchdog make this devices particularly
suitable to supply microprocessor systems in
automotive applications.
SO-8
SO-20
Table 1. Device summary
Package
Order codes
Tube Tape and reel
SO-8 L4989D L4989D013TR
SO-20 L4989MD L4989MD013TR
www.st.com
Contents L4989D, L4989MD
2/19 Doc ID 022376 Rev. 2
Contents
1 Block diagram and pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 ECOPACK
®
packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 SO-20 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 SO-8 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5 SO-20 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
L4989D, L4989MD List of tables
Doc ID 022376 Rev. 2 3/19
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 5. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 6. Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 7. Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 8. Watchdog Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 9. SO-8 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 10. SO-20 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 11. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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L4989MD

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Manufacturer:
STMicroelectronics
Description:
LDO Voltage Regulators LW PWR VOLT REGULATR
Lifecycle:
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