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L4938ED

STMicroelectronics
Part Number L4938ED
Manufacturer STMicroelectronics
Description ADVANCED VOLTAGE REGULATOR
Published Mar 22, 2005
Detailed Description L4938ED L4938EPD Advanced voltage regulator Features ■ Enable and sense inputs (EN, SI) protected against negative tran...
Datasheet PDF File L4938ED PDF File

L4938ED
L4938ED

Overview
L4938ED L4938EPD Advanced voltage regulator Features ■ Enable and sense inputs (EN, SI) protected against negative transients down to -5 V ■ Reset threshold adjustable from 3.
8 V to 4.
7 V ■ Extremely low quiescent current, 65 µA (less than 90 µA) in standby mode ■ Operating DC supply voltage range 5 V - 28 V ■ Operating transient supply voltage up to 40 V ■ High precision standby output voltage 5 V ± 1% with 100 mA current capability ■ Output 2 voltage 5 V ± 2% with 400 mA current capability (ADJ wired to VOUT2) ■ Output 2 voltage adjustable by external voltage divider ■ Output 2 disable function for standby mode SO-20 PowerSO-20 Description The L4938ED and L4938EPD are monolithic integrated dual voltage regulators with two very low dropout outputs and additional functions such as power-on reset and input voltage sense.
They are designed for supplying microcomputer controlled systems especially in automotive applications.
September 2013 Table 1.
Device summary Package Order codes Tube Tape and reel SO-20 L4938ED L4938ED013TR PowerSO-20 L4938EPD L4938EPD13TR Doc ID 17243 Rev 2 1/20 www.
st.
com 1 Contents Contents L4938ED, L4938EPD 1 Block diagram and pin description .
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5 2 Electrical specifications .
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7 2.
1 Absolute maximum ratings .
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7 2.
2 Thermal data .
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8 2.
3 Electrical characteristics .
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8 3 Application information .
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11 3.
1 Functional description .
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11 3.
2 Standby regulator .
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