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STMicroelectronics Electronic Components Datasheet

LD1117A Datasheet

Low drop fixed and adjustable positive voltage regulators

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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


STMicroelectronics Electronic Components Datasheet

LD1117A Datasheet

Low drop fixed and adjustable positive voltage regulators

No Preview Available !

Contents
Contents
LD1117A
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7 LD1117A adjustable: application note . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/24 DocID7194 Rev 26


Part Number LD1117A
Description Low drop fixed and adjustable positive voltage regulators
Maker ST Microelectronics
Total Page 24 Pages
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