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LD1117A

ST Microelectronics
Part Number LD1117A
Manufacturer ST Microelectronics
Description Low drop fixed and adjustable positive voltage regulators
Published Apr 25, 2005
Detailed Description LD1117A Low drop fixed and adjustable positive voltage regulators Datasheet - production data SOT-223 • Available in...
Datasheet PDF File LD1117A PDF File

LD1117A
LD1117A


Overview
LD1117A Low drop fixed and adjustable positive voltage regulators Datasheet - production data SOT-223 • Available in ± 2% (at 25 °C) and 4% in full temperature range • High supply voltage rejection: – 80 dB typ.
(at 25 °C) • Temperature range: 0 °C to 125 °C TO-220 Description DPAK Features • Low dropout voltage: – 1.
15 V typ.
@ IOUT = 1 A, 25 °C • Very low quiescent current: – 5 mA typ.
@ 25 °C • Output current up to 1 A The LD1117A is a low drop voltage regulator able to provide up to 1 A of output current, available also in adjustable versions (VREF = 1.
25 V).
In fixed versions, the following output voltages are offered: 1.
2 V, 1.
8 V, and 3.
3 V.
The device is supplied in: SOT-223, DPAK and TO-220.
Surface mounted packages optimize the thermal characteristics while offering a relevant space saving advantage.
High efficiency is assured by an NPN pass transistor.
Only a very common 10 µF minimum capacitor is needed for stability.
Chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 2% at 25 °C.
• Fixed output voltage of: – 1.
2 V, 1.
8 V, 3.
3 V • Adjustable version availability (VREF = 1.
25 V) • Internal current and thermal limit • Only 10 µF for stability Table 1.
Device summary SOT-223 Order codes DPAK TO-220 Output voltage LD1117AS12TR LD1117AS18TR LD1117AS33TR LD1117ASTR LD1117ADT12TR LD1117ADT18TR LD1117ADT33TR LD1117ADT-TR LD1117AV33 1.
2 V 1.
8 V 3.
3 V Adjustable from 1.
25 V July 2013 This is information on a product in full production.
DocID7194 Rev 26 1/24 www.
st.
com Contents Contents LD1117A 1 Diagram .
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3 2 Pin configuration .
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4 3 Maximum ratings .
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5 4 Schematic application .
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