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L4989
Low power voltage regulator
Features
■ Operating DC supply voltage range 5.6V to 31V
■ Very low quiescent current with watchdog disabled
■ Precision output voltage (3%)
■ Low drop voltage (180mV typ ai Io=150mA)
)■ Reset circuit sensing the output voltage down t(sto 1V c■ Programmable reset delay with external ucapacitor d■ Watchdog disable input ro■ Programmable watchdog timer with external Pcapacitor te■ Thermal shutdown and short circuit protection ole■ Wide temperature range (Tj = -40°C to 150°C)
SO-8
SO-20
) - ObsTable 1. Device summary ct(sPackage roduSO-8
Obsolete PSO-20
Tube L4989D L4989MD
Order codes
Tape & reel L4989D013TR L4989MD013TR
November 2008
Rev 3
1/19
www.st.com
19
Contents
Contents
L4989
1 Block diagram and pin configuration . . . . . . . . . . .
L4989 Datasheet
