Low drop fixed and adjustable positive voltage regulators

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  • 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.

    Key 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
    • 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
    • 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

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LD1117ADT-TR DPAK Tape And Reel 0 125
Active
0.278 10000 EAR99
MORE INFO

Country of Origin:

CHINA

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Farnell Element14 EUROPE 4650 1 Order Now

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13849

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1

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5000

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LD1117ADT33TR DPAK Tape And Reel 0 125
Active
0.278 10000 EAR99
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Country of Origin:

CHINA

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DIGIKEY WORLDWIDE 2116 1 Order Now
RS COMPONENTS EUROPE 6780 10 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 7500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 9862 1 Order Now

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2116

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6780

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10

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2500

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2500

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LD1117ASTR SOT-223 Tape And Reel 0 125
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0.186 10000 EAR99
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CHINA

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RS COMPONENTS EUROPE 7420 1 Order Now
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MOUSER WORLDWIDE 3431 1 Order Now
Farnell Element14 EUROPE 224 1 Order Now
ANGLIA Live EUROPE 250 2500 Order Now
RUTRONIK EUROPE 2500 2500 Order Now

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695

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7420

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1

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5000

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3431

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1

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224

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250

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2500

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Stock

2500

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2500

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LD1117ADT18TR DPAK Tape And Reel 0 125
Active
0.257 10000 EAR99
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CHINA

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DIGIKEY WORLDWIDE 1342 1 Order Now
RS COMPONENTS EUROPE 160 1 Order Now
ARROW AMERICA 560 1 Order Now
MOUSER WORLDWIDE 3789 1 Order Now

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1342

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1

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160

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560

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1

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Stock

3789

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LD1117AV33 TO-220 Tube 0 125
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0.211 10000 EAR99
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DIGIKEY WORLDWIDE 2180 1 Order Now
RS COMPONENTS EUROPE 2510 10 Order Now
ARROW EUROPE 708 0 Order Now
MOUSER WORLDWIDE 3472 1 Order Now
Farnell Element14 EUROPE 2131 1 Order Now
RUTRONIK EUROPE 5500 50 Order Now

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2510

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LD1117AS12TR SOT-223 Tape And Reel 0 125
Active
0.186 10000 EAR99
MORE INFO

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CHINA

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Distributor availability ofLD1117AS12TR

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DIGIKEY WORLDWIDE 9545 1 Order Now
RS COMPONENTS EUROPE 8775 25 Order Now
AVNET AMERICA 2500 0 Order Now
ARROW EUROPE 6850 0 Order Now
ARROW AMERICA 5000 2500 Order Now
MOUSER WORLDWIDE 14357 1 Order Now

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9545

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1

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8775

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25

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2500

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Stock

6850

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0

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5000

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2500

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14357

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LD1117ADT12TR DPAK Tape And Reel 0 125
Active
0.278 10000 EAR99
MORE INFO

Country of Origin:

CHINA

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DIGIKEY WORLDWIDE 6883 1 Order Now
ARROW EUROPE 7500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 8186 1 Order Now
Farnell Element14 EUROPE 4785 1 Order Now

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6883

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1

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2500

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2500

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8186

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1

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Stock

4785

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1

Region

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LD1117AS18TR SOT-223 Tape And Reel 0 125
Active
0.186 10000 EAR99
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Country of Origin:

CHINA

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Distributor availability ofLD1117AS18TR

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DIGIKEY WORLDWIDE 4920 1 Order Now
RS COMPONENTS EUROPE 8496 25 Order Now
AVNET AMERICA 33915 0 Order Now
ARROW EUROPE 7500 0 Order Now
MOUSER WORLDWIDE 5926 1 Order Now
Farnell Element14 EUROPE 6610 1 Order Now
ANGLIA Live EUROPE 5 2500 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2019-11-18

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DIGIKEY

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4920

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1

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Stock

8496

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25

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Stock

33915

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0

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Stock

7500

Min.Order

0

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Stock

5926

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1

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Stock

6610

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Stock

5

Min.Order

2500

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RUTRONIK

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-18

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LD1117AS33TR SOT-223 Tape And Reel 0 125
Active
0.186 10000 EAR99
MORE INFO

Country of Origin:

CHINA

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Distributor availability ofLD1117AS33TR

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Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7339 1 Order Now
RS COMPONENTS EUROPE 16142 25 Order Now
AVNET AMERICA 135000 0 Order Now
FUTURE WORLDWIDE 4074 1 Order Now
ARROW EUROPE 58026 0 Order Now
Newark Element14 AMERICA 1159 0 Order Now
MOUSER WORLDWIDE 9483 1 Order Now
Farnell Element14 EUROPE 14133 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

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7339

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16142

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25

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135000

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0

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Stock

4074

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58026

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0

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Newark Element14

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1159

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0

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Stock

9483

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1

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Stock

14133

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1

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Stock

5000

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2500

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Distributor reported inventory date: 2019-11-18

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LD1117ADT-TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.278*

Distributor availability ofLD1117ADT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 13849 1 Order Now
RS COMPONENTS EUROPE 440 10 Order Now
ARROW EUROPE 5000 0 Order Now
MOUSER WORLDWIDE 8522 1 Order Now
Farnell Element14 EUROPE 4650 1 Order Now

Distributor reported inventory date: 2019-11-18

Distributor Name

DIGIKEY

Stock

13849

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

440

Min.Order

10

Region

EUROPE Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

8522

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4650

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-18

Operating Temperature (°C)

(min)

0

(max)

125

Marketing Status

Active

Unit Price (US$)

0.278

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LD1117ADT33TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.278*

Distributor availability ofLD1117ADT33TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2116 1 Order Now
RS COMPONENTS EUROPE 6780 10 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 7500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 9862 1 Order Now

Distributor reported inventory date: 2019-11-18

Distributor Name

DIGIKEY

Stock

2116

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

6780

Min.Order

10

Region

EUROPE Order Now

FUTURE

Stock

2500

Min.Order

2500

Region

WORLDWIDE Order Now

ARROW

Stock

7500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

9862

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-11-18

Operating Temperature (°C)

(min)

0

(max)

125

Marketing Status

Active

Unit Price (US$)

0.278

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LD1117ASTR

Package

SOT-223

Packing Type

Tape And Reel

Unit Price (US$)

0.186*

Distributor availability ofLD1117ASTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 695 1 Order Now
RS COMPONENTS EUROPE 7420 1 Order Now
ARROW EUROPE 5000 0 Order Now
MOUSER WORLDWIDE 3431 1 Order Now
Farnell Element14 EUROPE 224 1 Order Now
ANGLIA Live EUROPE 250 2500 Order Now
RUTRONIK EUROPE 2500 2500 Order Now

Distributor reported inventory date: 2019-11-18

Distributor Name

DIGIKEY

Stock

695

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

7420

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3431

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

224

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

250

Min.Order

2500

Region

EUROPE Order Now

RUTRONIK

Stock

2500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-18

Operating Temperature (°C)

(min)

0

(max)

125

Marketing Status

Active

Unit Price (US$)

0.186

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LD1117ADT18TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.257*

Distributor availability ofLD1117ADT18TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1342 1 Order Now
RS COMPONENTS EUROPE 160 1 Order Now
ARROW AMERICA 560 1 Order Now
MOUSER WORLDWIDE 3789 1 Order Now

Distributor reported inventory date: 2019-11-18

Distributor Name

DIGIKEY

Stock

1342

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

160

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

560

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

3789

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-11-18

Operating Temperature (°C)

(min)

0

(max)

125

Marketing Status

Active

Unit Price (US$)

0.257

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LD1117AV33

Package

TO-220

Packing Type

Tube

Unit Price (US$)

0.211*

Distributor availability ofLD1117AV33

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2180 1 Order Now
RS COMPONENTS EUROPE 2510 10 Order Now
ARROW EUROPE 708 0 Order Now
MOUSER WORLDWIDE 3472 1 Order Now
Farnell Element14 EUROPE 2131 1 Order Now
RUTRONIK EUROPE 5500 50 Order Now

Distributor reported inventory date: 2019-11-18

Distributor Name

DIGIKEY

Stock

2180

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2510

Min.Order

10

Region

EUROPE Order Now

ARROW

Stock

708

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3472

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2131

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

5500

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-18

Operating Temperature (°C)

(min)

0

(max)

125

Marketing Status

Active

Unit Price (US$)

0.211

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LD1117AS12TR

Package

SOT-223

Packing Type

Tape And Reel

Unit Price (US$)

0.186*

Distributor availability ofLD1117AS12TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 9545 1 Order Now
RS COMPONENTS EUROPE 8775 25 Order Now
AVNET AMERICA 2500 0 Order Now
ARROW EUROPE 6850 0 Order Now
ARROW AMERICA 5000 2500 Order Now
MOUSER WORLDWIDE 14357 1 Order Now

Distributor reported inventory date: 2019-11-18

Distributor Name

DIGIKEY

Stock

9545

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

8775

Min.Order

25

Region

EUROPE Order Now

AVNET

Stock

2500

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

6850

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

5000

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

14357

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-11-18

Operating Temperature (°C)

(min)

0

(max)

125

Marketing Status

Active

Unit Price (US$)

0.186

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LD1117ADT12TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.278*

Distributor availability ofLD1117ADT12TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6883 1 Order Now
ARROW EUROPE 7500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 8186 1 Order Now
Farnell Element14 EUROPE 4785 1 Order Now

Distributor reported inventory date: 2019-11-18

Distributor Name

DIGIKEY

Stock

6883

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

7500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

8186

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4785

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-18

Operating Temperature (°C)

(min)

0

(max)

125

Marketing Status

Active

Unit Price (US$)

0.278

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LD1117AS18TR

Package

SOT-223

Packing Type

Tape And Reel

Unit Price (US$)

0.186*

Distributor availability ofLD1117AS18TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4920 1 Order Now
RS COMPONENTS EUROPE 8496 25 Order Now
AVNET AMERICA 33915 0 Order Now
ARROW EUROPE 7500 0 Order Now
MOUSER WORLDWIDE 5926 1 Order Now
Farnell Element14 EUROPE 6610 1 Order Now
ANGLIA Live EUROPE 5 2500 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2019-11-18

Distributor Name

DIGIKEY

Stock

4920

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

8496

Min.Order

25

Region

EUROPE Order Now

AVNET

Stock

33915

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

7500

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

5926

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

6610

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

5

Min.Order

2500

Region

EUROPE Order Now

RUTRONIK

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-18

Operating Temperature (°C)

(min)

0

(max)

125

Marketing Status

Active

Unit Price (US$)

0.186

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LD1117AS33TR

Package

SOT-223

Packing Type

Tape And Reel

Unit Price (US$)

0.186*

Distributor availability ofLD1117AS33TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7339 1 Order Now
RS COMPONENTS EUROPE 16142 25 Order Now
AVNET AMERICA 135000 0 Order Now
FUTURE WORLDWIDE 4074 1 Order Now
ARROW EUROPE 58026 0 Order Now
Newark Element14 AMERICA 1159 0 Order Now
MOUSER WORLDWIDE 9483 1 Order Now
Farnell Element14 EUROPE 14133 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2019-11-18

Distributor Name

DIGIKEY

Stock

7339

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

16142

Min.Order

25

Region

EUROPE Order Now

AVNET

Stock

135000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

4074

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

58026

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1159

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

9483

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

14133

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-18

Operating Temperature (°C)

(min)

0

(max)

125

Marketing Status

Active

Unit Price (US$)

0.186

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Technical Documentation

    • Description Version Size Action
      DS1976
      Low drop fixed and adjustable positive voltage regulators
      26.0
      725.19 KB
      PDF
      DS1976

      Low drop fixed and adjustable positive voltage regulators

Publications and Collaterals

    • Description Version Size Action
      Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      PDF

      Linear and Switching Voltage Regulators Selection Guide

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LD1117ADT-TR
Active
DPAK Industrial Ecopack2
LD1117ADT12TR
Active
DPAK Industrial Ecopack2
LD1117ADT18TR
Active
DPAK Industrial Ecopack2
LD1117ADT33TR
Active
DPAK Industrial Ecopack2
LD1117AS12TR
Active
SOT-223 Industrial Ecopack2
LD1117AS18TR
Active
SOT-223 Industrial Ecopack2
LD1117AS33TR
Active
SOT-223 Industrial Ecopack2
LD1117ASTR
Active
SOT-223 Industrial Ecopack2
LD1117AV33
Active
TO-220 Industrial Ecopack2

LD1117ADT-TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD1117ADT12TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD1117ADT18TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD1117ADT33TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD1117AS12TR

Package:

SOT-223

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT-223

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD1117AS18TR

Package:

SOT-223

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT-223

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD1117AS33TR

Package:

SOT-223

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT-223

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD1117ASTR

Package:

SOT-223

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT-223

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD1117AV33

Package:

TO-220

Material Declaration**:

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.