LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1 A Low Dropout
Positive Voltage Regulator
LD1117A12/ADJ-LD1117A50/ADJ
1A Low Dropout Positive Voltage Regulator
General Description
LD1117A is a three terminal low dropout positive voltage regulator.
It provides current limiting and thermal shut down and its circuit includes a trimmed
Bandgap reference to assure output voltage accuracy for both fixed output voltage
version and adjustable output voltage version. Current limit is trimmed to ensure
specified output current and controlled short-circuit current.On-chip thermal shutdown
provides protection against any combination of overload and ambient temperature that
would create excessive junction temperature
There are 7 Fixed output voltages :1.2V, 1.5V,1.8V, 2.5V ,2.85V,3.3V an 5.0V.
There are also an adjustble version provide output voltage from 1.25V to 12V with
2 external resisitors.
They are suitable for applications that required supply current up to 1 A.
LD1117A series are available in SOT-223 ,SOT-89 ,TO-220,DPAK (TO-252) and
D2PAK (TO-263) Packages
Features
Input Voltage up to 20V
Output Current up to 1A
Low Drop Output Voltage:Typical 1.15V at 1A output current
Output Voltage Accuracy : ±1% for fixed output Voltage 1.5V,1.8V, 2.5V ,2.85V,
3.3V,5.0V and Adjustble Output Voltage Version.
±2% for fixed output Voltage 1.2V
Trimmed Current Limit and On-Chip Thermal Shutdown
Operation Junction Temperature: -40°C to 125°C
RoHS Compliance and Halogen Free
Applications
PC Mother Board
Graphic Card
NIC/Switch
LCD Monitor , DVD Video Player and Printer
Telecom Equipment and other Peripheral Equipment
SOT-223
SOT-89
TO-220
DPAK
D2PAK
TAITRON COMPONENTS INCORPORATED www.taitroncomponents.com
Tel: (800)-TAITRON (800)-824-8766 (661)-257-6060
Fax: (800)-TAITFAX (800)-824-8329 (661)-257-6415
Rev. A/LX
Page 1 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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Ordering Information
1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Pin Configuration
1: GND/ADJ 2: OUTPUT 3: INPUT
SOT-223
1: GND/ADJ 2: OUTPUT 3: INPUT
SOT-89
1: GND/ADJ 2: OUTPUT 3: INPUT
TO-220
1: GND/ADJ 2: OUTPUT 3: INPUT
DPAK
www.taitroncomponents.com
1: GND/ADJ 2: OUTPUT 3: INPUT
D2PAK
Rev. A/LX
Page 2 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Marking information:
Outline
Temperatue
Range
ROHS
PN
Halogen Free
SOT-223
SOT-89
-40°C to 125°C
-40°C to 125°C
LD1117AADJH-08-TR30
LD1117A12H-08-TR30
LD1117A15H-08-TR30
LD1117A18H-08-TR30
LD1117A25H-08-TR30
LD1117A285H-08-TR30
LD1117A33H-08-TR30
LD1117A50H-08-TR30
LD1117AADJK-08-TR30
LD1117A12K-08-TR30
LD1117A15K-08-TR30
LD1117A18K-08-TR30
LD1117A25K-08-TR30
LD1117A285K-08-TR30
LD1117A33K-08-TR30
LD1117A50K-08-TR30
LD1117AADJH-08-RG30
LD1117A12H-08-RG30
LD1117A15H-08-RG30
LD1117A18H-08-RG30
LD1117A25H-08-RG30
LD1117A285H-08-RG30
LD1117A33H-08-RG30
LD1117A50H-08-RG30
LD1117AADJK-08-RG30
LD1117A12K-08-RG30
LD1117A15K-08-RG30
LD1117A18K-08-RG30
LD1117A25K-08-RG30
LD1117A285K-08-RG30
LD1117A33K-08-RG30
LD1117A50K-08-RG30
LD1117AADJT-08-TU LD1117AADJT-08-UG
LD1117A12T-08-TU
LD1117A12T-08-UG
LD1117A15T-08-TU
LD1117A15T-08-UG
TO-220
LD1117A18T-08-TU
-40°C to 125°C
LD1117A25T-08-TU
LD1117A18T-08-UG
LD1117A25T-08-UG
LD1117A285T-08-TU
LD1117A285T-08-UG
LD1117A33T-08-TU
LD1117A33T-08-UG
LD1117A50T-08-TU
LD1117A50T-08-UG
Marking Code
ROHS
Halogen
Free
EH11A
GH11A
EH18A
GH18A
EH12A
GH12A
EH13A
GH13A
EH14A
GH14A
EH15A
GH15A
EH16A
GH16A
EH17A
GH17A
E17A
G17A
E17G
G17G
E17B
G17B
E17C
G17C
E17D
G17D
E17H
G17H
E17E
G17E
E17F
AZ1117T
-ADJEA
AZ1117T
-1.2EA
AZ1117T
-1.5EA
AZ1117T
-1.8EA
AZ1117T
-2.5EA
AZ1117T
-2.85EA
AZ1117T
-3.3EA
AZ1117T
-5.0EA
G17F
AZ1117T
-ADJGA
AZ1117T
-1.2GA
AZ1117T
-1.5GA
AZ1117T
-1.8GA
AZ1117T
-2.5GA
AZ1117T
-2.85GA
AZ1117T
-3.3GA
AZ1117T
-5.0GA
Packing
Type
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tube
Tube
Tube
Tube
Tube
Tube
Tube
Tube
www.taitroncomponents.com
Rev. A/LX
Page 3 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Outline
DPAK
Temperatue
Range
-40°C to 125°C
RoHS
PN
Halogen Free
LD1117AADJD-08-TR30 LD1117AADJD-08-RG30
LD1117AADJD-08-TU LD1117AADJD-08-UG
LD1117A12D-08-TR30 LD1117A12D-08-RG30
LD1117A12D-08-TU
LD1117A12D-08-UG
LD1117A15D-08-TR30 LD1117A15D-08-RG30
LD1117A15D-08-TU
LD1117A15D-08-UG
LD1117A18D-08-TR30 LD1117A18D-08-RG30
LD1117A18D-08-TU
LD1117A18D-08-UG
LD1117A25D-08-TR30 LD1117A25D-08-RG30
LD1117A25D-08-TU
LD1117A25D-08-UG
LD1117A285D-08-TR30 LD1117A285D-08-RG30
LD1117A285D-08-TU LD1117A285D-08-UG
LD1117A33D-08-TR30 LD1117A33D-08-RG30
LD1117A33D-08-TU
LD1117A33D-08-UG
LD1117A50D-08-TR30 LD1117A50D-08-RG30
LD1117A50D-08-TU
LD1117A50D-08-UG
Marking Code
RoHS
Halogen
Free
AZ1117D AZ1117D
-ADJEA -ADJGA
AZ1117D AZ1117D
-ADJEA -ADJGA
AZ1117D AZ1117D
-1.2EA
-1.2GA
AZ1117D AZ1117D
-1.2EA
-1.2GA
AZ1117D AZ1117D
-1.5EA -1.5GA
AZ1117D AZ1117D
-1.5EA
-1.5GA
AZ1117D AZ1117D
-1.8EA
-1.8GA
AZ1117D AZ1117D
-1.8EA
-1.8GA
AZ1117D AZ1117D
-2.5EA
-2.5GA
AZ1117D AZ1117D
-2.5EA
-2.5GA
AZ1117D AZ1117D
-2.85EA -2.85GA
AZ1117D AZ1117D
-2.85EA -2.85GA
AZ1117D AZ1117D
-3.3EA
-3.3GA
AZ1117D AZ1117D
-3.3EA
-3.3GA
AZ1117D AZ1117D
-5.0EA
-5.0GA
AZ1117D AZ1117D
-5.0EA
-5.0GA
Packing
Type
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
www.taitroncomponents.com
Rev. A/LX
Page 4 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Outline
D2PAK
Temperatue
Range
-40°C to 125°C
PN
RoHS
Halogen Free
LD1117AADJMC-08-
TR30
LD1117AADJMC-08-
RG30
LD1117AADJMC-08-TU LD1117AADJMC-08-UG
LD1117A12MC-08-TR30 LD1117A12MC-08-RG30
LD1117A12MC-08-TU
LD1117A12MC-08-UG
LD1117A15MC-08-TR30 LD1117A15MC-08-RG30
LD1117A15MC-08-TU
LD1117A15MC-08-UG
LD1117A18MC-08-TR30 LD1117A18MC-08-RG30
LD1117A18MC-08-TU
LD1117A18MC-08-UG
LD1117A25MC-08-TR30 LD1117A25MC-08-RG30
LD1117A25MC-08-TU
LD1117A285MC-08-
TR30
LD1117A285MC-08-TU
LD1117A25MC-08-UG
LD1117A285MC-08-
RG30
LD1117A285MC-08-UG
LD1117A33MC-08-TR30 LD1117A33MC-08-RG30
LD1117A33MC-08-TU
LD1117A33MC-08-UG
LD1117A50MC-08-TR30 LD1117A50MC-08-RG30
LD1117A50MC-08-TU
LD1117A50MC-08-UG
Marking Code
RoHS
Halogen
Free
AZ1117S AZ1117S
-ADJEA -ADJGA
AZ1117S AZ1117S
-ADJEA -ADJGA
AZ1117S AZ1117S
-1.2EA
-1.2GA
AZ1117S AZ1117S
-1.2EA
-1.2GA
AZ1117S AZ1117S
-1.5EA
-1.5GA
AZ1117S AZ1117S
-1.5EA
-1.5GA
AZ1117S AZ1117S
-1.8EA
-1.8GA
AZ1117S AZ1117S
-1.8EA
-1.8GA
AZ1117S AZ1117S
-2.5EA
-2.5GA
AZ1117S AZ1117S
-2.5EA
-2.5GA
AZ1117S AZ1117S
-2.85EA -2.85GA
AZ1117S AZ1117S
-2.85EA -2.85GA
AZ1117S AZ1117S
-3.3EA
-3.3GA
AZ1117S AZ1117S
-3.3EA
-3.3GA
AZ1117S AZ1117S
-5.0EA
-5.0GA
AZ1117S AZ1117S
-5.0EA
-5.0GA
Packing
Type
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
www.taitroncomponents.com
Rev. A/LX
Page 5 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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Block Diagram
1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
www.taitroncomponents.com
Rev. A/LX
Page 6 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Absolute Maximum Ratings
Symbol
VIN
TJ
TSTG
TLEAD(10 sec)
ESD(Human body model)
ESD(Machine model)
Description
Input Voltage(Note1)
Junction Temperature (Note2)
Storage Temperature Range
Lead Soldering Temperature
Thermal Resistance (No Heatsink,
Note 3)
ESD
ESD
Ratings
20
150
-65 to 150
260
SOT-223 120
SOT-89
165
TO-220
60
DPAK
100
D2PAK
60
2000
250
Unit
V
°C
°C
°C
° C/W
V
V
Note 1: Input Voltage is recommended operating at 15V max.
Note2 : Operating Junction Temperature is recommended at -40° C to 125° C.
Note3: PD(Max)=(TJ(max)-TA)/ ,PD(Max):Maximum Power Dissipation; TA: Ambient Temperature,
TJ(max): Maximum Junction Temperature ; :The Junction-to Ambient Thermal Resistance.
Exceeding the maximum allowable power dissipation will result in die temperature and the Regulator
will go into thermal shutdown
www.taitroncomponents.com
Rev. A/LX
Page 7 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Electrical Characteristics
For LD1117A-ADJ (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
VREF Reference Voltage
VLINE
VLOAD
ILIMIT
IADJ
IADJ
ILOAD
IQ
Line Regulation
Load Regulation
Current Limit
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current
Quiescent Current
VD Dropout Voltage
eN
PSRR
-
-
Output Noise Voltage
Power Supply Ripple Rejection
Ratio
Temperature Stability
Long-term Temperature Stability
SOT-223
Thermal
Resistance
SOT-89
TO-220
DPAK
D2PAK
LD1117A-ADJ
Min.
Type.
Max.
1.238 1.250 1.262
1.225 1.250 1.270
- 0.035 0.2
- 0.2 0.4
1.25 1.35 -
- 60 120
- 0.2 5
- 1.7 5
- 5 10
- 1.0 1.1
1.08 1.18
1.15 1.25
- 0.003 -
60 75
-
- 0.5 -
- 0.3
- 25 -
- 30 -
- 10 -
- 17 -
- 10 -
Unit
V
V
%
%
A
uA
uA
mA
mA
V
V
V
%
dB
%
%
° C/W
Test Conditions
VIN-VO=2V, IO=10mA
1.4VVIN-VO8V, 10mAIO1A
PDPD(max),
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
-
1.4VVIN-VO10V, 10mAIO1A
1.5VVIN-VO10V,(ADJ only)
VIN-VO=1.25V
VREF=1%,IO=100mA
VREF=1%,IO=500mA
VREF=1%,IO=1A
10Hzf10KHz,TA=25°C
VIN-VO=3V, IO=1A, f=120Hz
CO=22uF Tantalum
-
TA=125°C,1000hrs
-
-
-
-
-
For LD1117A12 (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
LD1117A12
Min.
Type.
Max.
VO Output Voltage
1.176 1.2 1.224
1.152 1.2 1.248
VLINE Line Regulation
VLOAD Load Regulation
- 16
- 1 10
ILIMIT Current Limit
1.25 1.35 -
IQ Quiescent Current
- 5 10
Unit
V
V
mV
mV
A
mA
www.taitroncomponents.com
Test Conditions
VIN =3.2V, IO=10mA
3.0VVIN10V,10mAIO1A
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
VIN-VO=1.25V
Rev. A/LX
Page 8 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
VD Dropout Voltage
eN
PSRR
-
-
Output Noise Voltage
Power Supply Ripple Rejection
Ratio
Temperature Stability
Long-term Temperature Stability
SOT-223
Thermal
Resistance
SOT-89
TO-220
DPAK
D2PAK
- 1.0 1.1 V VLINE ,VLOAD =1%,IO=100mA
- 1.08 1.18
V
VLINE ,VLOAD =1%,IO=500mA
- 1.15 1.25
V
VLINE ,VLOAD =1%,IO=1A
- 0.003 -
%
10Hzf10KHz,TA=25°C
60 75
-
dB
VIN-VO=3V, IO=1A, f=120Hz
CO=22uF Tantalum
- 0.5 -
%
-
- 0.3
% TA=125°C,1000hrs
- 25 -
-
- 30 -
-
- 10 - ° C/W
-
- 17 -
-
- 10 -
-
For LD1117A15 (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
LD1117A15
Min.
Type.
Max.
VO Output Voltage
1.485 1.5 1.515
1.470 1.5 1.530
VLINE Line Regulation
VLOAD Load Regulation
- 16
- 1 10
ILIMIT Current Limit
1.25 1.35 -
IQ Quiescent Current
- 5 10
- 1.0 1.1
VD Dropout Voltage
- 1.08 1.18
- 1.15 1.25
eN Output Noise Voltage
- 0.003 -
PSRR
Power Supply Ripple Rejection
Ratio
60 75
-
- Temperature Stability
- 0.5 -
-
Long-term Temperature Stability
-
0.3
SOT-223
- 25 -
Thermal
Resistance
SOT-89
TO-220
DPAK
- 30 -
- 10 -
- 17 -
D2PAK
- 10 -
Unit
V
V
mV
mV
A
mA
V
V
V
%
dB
%
%
° C/W
Test Conditions
VIN =3.5V, IO=10mA
3.0VVIN10V,10mAIO1A
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
VIN-VO=1.25V
VLINE ,VLOAD =1%,IO=100mA
VLINE ,VLOAD =1%,IO=500mA
VLINE ,VLOAD =1%,IO=1A
10Hzf10KHz,TA=25°C
VIN-VO=3V, IO=1A, f=120Hz
CO=22uF Tantalum
-
TA=125°C,1000hrs
-
-
-
-
-
www.taitroncomponents.com
Rev. A/LX
Page 9 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
For LD1117A18 (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
LD1117A18
Min.
Type.
Max.
VO Output Voltage
1.782 1.8 1.818
1.746 1.8 1.854
VLINE Line Regulation
- 16
VLOAD Load Regulation
- 1 10
ILIMIT Current Limit
1.25 1.35 -
IQ Quiescent Current
- 5 10
- 1.0 1.1
VD Dropout Voltage
- 1.08 1.18
- 1.15 1.25
eN Output Noise Voltage
- 0.003 -
PSRR
Power Supply Ripple Rejection
Ratio
60 75
-
- Temperature Stability
- 0.5 -
-
Long-term Temperature Stability
-
0.3
SOT-223
- 25 -
Thermal
Resistance
SOT-89
TO-220
DPAK
- 30 -
- 10 -
- 17 -
D2PAK
- 10 -
Unit
V
V
mV
mV
A
mA
V
V
V
%
dB
%
%
° C/W
For LD1117A25 (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
LD1117A25
Min.
Type.
Max.
VO Output Voltage
2.475 2.5 2.525
2.450 2.5 2.550
VLINE Line Regulation
VLOAD Load Regulation
- 16
- 1 10
ILIMIT Current Limit
1.25 1.35 -
IQ Quiescent Current
- 5 10
- 1.0 1.1
VD Dropout Voltage
- 1.08 1.18
- 1.15 1.25
eN Output Noise Voltage
- 0.003 -
PSRR
Power Supply Ripple Rejection
Ratio
60 75
-
- Temperature Stability
- 0.5 -
-
Long-term Temperature Stability
-
0.3
Unit
V
V
mV
mV
A
mA
V
V
V
%
dB
%
%
www.taitroncomponents.com
Test Conditions
VIN =3.8V, IO=10mA
3.2VVIN10V,10mAIO1A
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
VIN-VO=1.25V
VLINE ,VLOAD =1%,IO=100mA
VLINE ,VLOAD =1%,IO=500mA
VLINE ,VLOAD =1%,IO=1A
10Hzf10KHz,TA=25°C
VIN-VO=3V, IO=1A, f=120Hz
CO=22uF Tantalum
-
TA=125°C,1000hrs
-
-
-
-
-
Test Conditions
VIN =4.5V, IO=10mA
3.9VVIN10V,10mAIO1A
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
VIN-VO=1.25V
VLINE ,VLOAD =1%,IO=100mA
VLINE ,VLOAD =1%,IO=500mA
VLINE ,VLOAD =1%,IO=1A
10Hzf10KHz,TA=25°C
VIN-VO=3V, IO=1A, f=120Hz
CO=22uF Tantalum
-
TA=125°C,1000hrs
Rev. A/LX
Page 10 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Thermal
Resistance
SOT-223
SOT-89
TO-220
DPAK
D2PAK
- 25 -
- 30 -
- 10 - ° C/W
- 17 -
- 10 -
For LD1117A285 (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
LD1117A285
Min.
Type.
Max.
Unit
VO Output Voltage
2.822 2.85 2.878
2.793 2.85 2.907
V
V
VLINE Line Regulation
- 1 6 mV
VLOAD Load Regulation
- 1 10 mV
ILIMIT Current Limit
1.25 1.35 -
A
IQ Quiescent Current
- 5 10 mA
- 1.0 1.1
V
VD Dropout Voltage
- 1.08 1.18
V
- 1.15 1.25
V
eN Output Noise Voltage
- 0.003 -
%
PSRR
Power Supply Ripple Rejection
Ratio
60 75
-
dB
- Temperature Stability
- 0.5 -
%
-
Long-term Temperature Stability
-
0.3
%
SOT-223
- 25 -
Thermal
Resistance
SOT-89
TO-220
DPAK
- 30 -
- 10 - ° C/W
- 17 -
D2PAK
- 10 -
-
-
-
-
-
Test Conditions
VIN =4.85V, IO=10mA
4.25VVIN10V,10mAIO1A
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
VIN-VO=1.25V
VLINE ,VLOAD =1%,IO=100mA
VLINE ,VLOAD =1%,IO=500mA
VLINE ,VLOAD =1%,IO=1A
10Hzf10KHz,TA=25°C
VIN-VO=3V, IO=1A, f=120Hz
CO=22uF Tantalum
-
TA=125°C,1000hrs
-
-
-
-
-
For LD1117A33 (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
LD1117A33
Min.
Type.
Max.
VO Output Voltage
3.267 3.3 3.333
3.235 3.3 3.365
VLINE Line Regulation
- 16
VLOAD Load Regulation
- 1 10
ILIMIT Current Limit
1.25 1.35 -
IQ Quiescent Current
- 5 10
Unit
V
V
mV
mV
A
mA
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Test Conditions
VIN =5.0V, IO=10mA
4.75VVIN10V,10mAIO1A
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
VIN-VO=1.25V
Rev. A/LX
Page 11 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
VD Dropout Voltage
eN
PSRR
-
-
Output Noise Voltage
Power Supply Ripple Rejection
Ratio
Temperature Stability
Long-term Temperature Stability
SOT-223
Thermal
Resistance
SOT-89
TO-220
DPAK
D2PAK
- 1.0 1.1 V VLINE ,VLOAD =1%,IO=100mA
- 1.08 1.18
V
VLINE ,VLOAD =1%,IO=500mA
- 1.15 1.25
V
VLINE ,VLOAD =1%,IO=1A
- 0.003 -
%
10Hzf10KHz,TA=25°C
60 75
-
dB
VIN-VO=3V, IO=1A, f=120Hz
CO=22uF Tantalum
- 0.5 -
%
-
- 0.3
% TA=125°C,1000hrs
- 25 -
-
- 30 -
-
- 10 - ° C/W
-
- 17 -
-
- 10 -
-
For LD1117A50 (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
LD1117A50
Min.
Type.
Max.
VO Output Voltage
4.95 5.0 5.05
4.9 5.0 5.1
VLINE Line Regulation
VLOAD Load Regulation
- 1 10
- 1 15
ILIMIT Current Limit
1.25 1.35 -
IQ Quiescent Current
- 5 10
- 1.0 1.1
VD Dropout Voltage
- 1.08 1.18
- 1.15 1.25
eN Output Noise Voltage
- 0.003 -
PSRR
Power Supply Ripple Rejection
Ratio
60 75
-
- Temperature Stability
- 0.5 -
-
Long-term Temperature Stability
-
0.3
SOT-223
- 25 -
Thermal
Resistance
SOT-89
TO-220
DPAK
- 30 -
- 10 -
- 17 -
D2PAK
- 10 -
Unit
V
V
mV
mV
A
mA
V
V
V
%
dB
%
%
° C/W
Test Conditions
VIN =7.0V, IO=10mA
6.5VVIN12V,10mAIO1A
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
VIN-VO=1.25V
VLINE ,VLOAD =1%,IO=100mA
VLINE ,VLOAD =1%,IO=500mA
VLINE ,VLOAD =1%,IO=1A
10Hzf10KHz,TA=25°C
VIN-VO=3V, IO=1A, f=120Hz
CO=22uF Tantalum
-
TA=125°C,1000hrs
-
-
-
-
-
www.taitroncomponents.com
Rev. A/LX
Page 12 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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Typical Application
1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
www.taitroncomponents.com
Rev. A/LX
Page 13 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Typical Characteristics Curves
Fig.1 VD-IO
Fig.2 VD-TJ
Output Current IO (A)
Fig-3 VLOAD-TJ
Operation Junction Temperature TJ (°C)
Fig-4 VREF-TJ
Operation Junction Temperature TJ (°C)
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Operation Junction Temperature TJ (°C)
Rev. A/LX
Page 14 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Fig.5 VO-TJ
Fig.6 ILOAD-TJ
Operation Junction Temperature TJ (°C)
Fig.7 IADJ-TJ
Operation Junction Temperature TJ (°C)
Fig.8 ISHORT-TJ
Operation Junction Temperature TJ (°C)
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Operation Junction Temperature TJ (°C)
Rev. A/LX
Page 15 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Fig.9 PD-TC
Fig.10 PSRR-f
Operation Case Temperature TC (°C)
Fig.11 Line Transient Response
LD1117A33
VIN=4.8 to5.8V
IO=100mA
CIN=1uF
COUT=10uF
Time (20us/Div)
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Frequency f (Hz)
Fig.12 Load Transient Response
LD1117A33
VIN=4.8V
IO=100mA to 500mA
CIN=10uF
COUT=10uF
Time (10us/Div)
Rev. A/LX
Page 16 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Dimensions in mm (inch)
SOT-223
www.taitroncomponents.com
Rev. A/LX
Page 17 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
www.taitroncomponents.com
SOT-89
Rev. A/LX
Page 18 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
TO-220
www.taitroncomponents.com
Rev. A/LX
Page 19 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
DPAK TO-252
www.taitroncomponents.com
D2PAK TO-263
Rev. A/LX
Page 20 of 21


LD1117A50 (TAITRON)
1A Low Dropout Positive Voltage Regulator

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How to contact us:
1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
US HEADQUARTERS
28040 WEST HARRISON PARKAWAY, VALENCIA, CA 91355-4162
Tel: (800) TAITRON (800) 824-8766 (661) 257-6060
Fax: (800) TAITFAX (800) 824-8329 (661) 257-6415
Email: taitron@taitroncomponents.com
Http://www.taitroncomponents.com
TAITRON COMPONENTS MEXICO, S.A .DE C.V.
BOULEVARD CENTRAL 5000 INTERIOR 5 PARQUE INDUSTRIAL ATITALAQUIA, HIDALGO C.P.
42970 MEXICO
Tel: +52-55-5560-1519
Fax: +52-55-5560-2190
TAITRON COMPONETS INCORPORATED E REPRESENTAÇÕES DO BRASIL LTDA
RUA DOMINGOS DE MORAIS, 2777, 2.ANDAR, SALA 24 SAÚDE - SÃO PAULO-SP 04035-001 BRAZIL
Tel: +55-11-5574-7949
Fax: +55-11-5572-0052
TAITRON COMPONETS INCORPORATED, SHANGHAI REPRESENTATIVE OFFICE
METROBANK PLAZA, 1160 WEST YAN’ AN ROAD, SUITE 1503, SHANGHAI, 200052, CHINA
Tel: +86-21-5424-9942
Fax: +86-21-5424-9931
www.taitroncomponents.com
Rev. A/LX
Page 21 of 21




LD1117A50.pdf
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