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LD1117S50 Datasheet

Adjustable and fixed low drop positive voltage regulator

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LD1117
Adjustable and fixed low drop positive voltage regulator
TO-220
DPAK
SOT-223
SO-8
Features
Low dropout voltage (1 V typ.)
2.85 V device performances are suitable for
SCSI-2 active termination
Output current up to 800 mA
Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V,
3.3 V, 5.0 V
Adjustable version availability (VREF = 1.25 V)
Internal current and thermal limit
Available in ± 1 % (at 25 °C) and 2 % in full
temperature range
Supply voltage rejection: 75 dB (typ.)
Datasheet - production data
Description
The LD1117 is a low drop voltage regulator able
to provide up to 800 mA of output current,
available even in adjustable version
(VREF = 1.25 V). Concerning fixed versions, are
offered the following output voltages: 1.2 V, 1.8 V,
2.5 V, 2.85 V, 3.3 V and 5.0 V. The device is
supplied in: SOT-223, DPAK, SO-8 and TO-220.
The SOT-223 and DPAK surface mount packages
optimize the thermal characteristics even offering
a relevant space saving effect. High efficiency is
assured by NPN pass transistor. In fact in this
case, unlike than PNP one, the quiescent current
flows mostly into the load. Only a very common
10 µF minimum capacitor is needed for stability.
On chip trimming allows the regulator to reach a
very tight output voltage tolerance, within ± 1 % at
25 °C. The adjustable LD1117 is pin to pin
compatible with the other standard. Adjustable
voltage regulators maintaining the better
performances in terms of drop and tolerance.
February 2020
This is information on a product in full production.
DocID2572 Rev 37
1/46
www.st.com
46


STMicroelectronics Electronic Components Datasheet

LD1117S50 Datasheet

Adjustable and fixed low drop positive voltage regulator

No Preview Available !

Contents
Contents
LD1117
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7
LD1117 adjustable: application note . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9
Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10
Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
11
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
2/46
DocID2572 Rev 37


Part Number LD1117S50
Description Adjustable and fixed low drop positive voltage regulator
Maker STMicroelectronics
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LD1117S50 Datasheet PDF






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