L4940D2T10-TR, L4940D2T12-TR, L4940D2T5-TR, L4940D2T85-TR, L4940P10, L4940P85, L4940V5, L4940V85, L4940XX10, L4940XX12, L4940XX5, L4940XX85

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L4940xx
Very low drop 1.5 A regulator
Features

Precise 5, 8.5, 10, 12 V outputs Low dropout voltage (450 mV typ. at 1 A) Very low quiescent current Thermal shutdown Short circuit protection Reverse polarity protection
TO-220 TO-220FP

Description
The L4940 series of three terminal positive regulators is available in TO-220, TO-220FP and D2PAK packages and with several fixed output voltages, making it useful in a wide range of industrial and consumer applications. Thanks to its very low input/output voltage drop, these devices are particularly suitable for batteries powered equipment, reducing consumption and
D2PAK

prolonging battery life. Each type employs internal current limiting, antisaturation circuit, thermal shut-down and safe area protection.

Table 1.

Device summary
Order code Output voltage 5V 8.5 V 10 V 12 V

Part number TO-220 L4940xx5 L4940xx85 L4940xx10 L4940xx12 L4940V5 L4940V85 L4940P85 TO-220FP

D2PAK L4940D2T5-TR L4940D2T85-TR L4940D2T10-TR L4940D2T12-TR

February 2008

Rev 10

1/23
www.st.com 23

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L4940D2T10-TR DATASHEET