LA317D - Taitron Components, Inc.

1A Adjustable
Positive Voltage Regulator
LA317
1A Adjustable Positive Voltage Regulator
General Description
• LA317 is three terminal adjustable positive regulators capable of supplying 1 A output
current.It could provide a very low dropout of 1.2V at 1A output current.
• The LA317 is exceptionally easy to use and requires only two external resistors to set
the output voltage which could down to 1.25V.Furthermore,both line and load regulation
are better than standard fixed regulators.Additionally,LA317 includes a trimmed bandgap
reference to assure the output voltage accuracy to be within 1.0%,it also provides on-chip
current limiting and thermal shut down.The current limit is trimmed to ensure specified
output current and controlled short-circuit current.The on-chip thermal limiting provides
protection against any combination of overload and ambient temperature that would create
excessive junction temperature.
TO-220
SOT-223
• LA317 is available in TO-220,SOT-223,DPAK (TO-252) and D2PAK (TO-263) packages.
DPAK
(TO-252)
.Features
•
•
•
•
Output Current up to 1 A
Adjustable Output Voltage down to 1.25V
Very Low Dropout Voltage:1.2V at 1A
Output Voltage Tolerance: typical 1.0%
•
•
•
•
•
•
Line regulation: typical 0.01%/V
Load regulation: typical 0.2%
On-chip Thermal Overload Protection
Trimmed Current Limiting
Operation Temperature Range:0°C to 125°C
RoHS Compliance and Halogen Free
D2PAK
(TO-263)
Applications
•
•
•
•
•
PC Mother Board
Graphic Card
NIC/Switch
LCD Monitor , DVD Video Player and Printer
Telecom Equipment and other Peripheral Equipment
TAITRON COMPONENTS INCORPORATED www.taitroncomponents.com
Tel:
Fax:
(800)-TAITRON (800)-824-8766
(800)-TAITFAX (800)-824-8329
(661)-257-6060
(661)-257-6415
Rev. A/LX
Page 1 of13
1A Adjustable Positive Voltage Regulator
LA317
Ordering Information
Pin Configuration
1: ADJ 2: OUTPUT 3: INPUT
TO-220
1: ADJ 2: OUTPUT 3: INPUT
DPAK
(TO-252)
1: ADJ 2: OUTPUT 3: INPUT
SOT-223
1: ADJ 2: OUTPUT 3: INPUT
D2PAK
(TO-263)
Rev. A/LX
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Page 2 of 13
1A Adjustable Positive Voltage Regulator
LA317
Functional Block Diagram
Marking information
Part Number
Halogen Free
Outline
Temperatue
Range
TO-220
0 to 125°C
LA317T-08-TU
SOT-223
0 to 125°C
DPAK
(TO-252)
0 to 125°C
D2PAK
(TO-263)
0 to 125°C
RoHS
Marking Code
Packing
Halogen Free T Type
RoHS
LA317T-08-UG
AZ317T-E1
AZ317T-G1
LA317H-08-TR70
LA317H-08-RG70
EH31A
GH31A
LA317D-08-TR70
LA317D-08-RG70
AZ317D-E1
AZ317D-G1
LA317D-08-UG
AZ317D-E1
AZ317D-G1
LA317MC-08-TR70
LA317MC-08-RG70
AZ317S-E1
AZ317S-G1
LA317MC-08-TU
LA317MC-08-UG
AZ317S-E1
AZ317S-G1
LA317D-08-TU
Tube
Tape
& Reel
Tape
& Reel
Tube
Tape
& Reel
Tube
Rev. A/LX
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Page 3 of 13
1A Adjustable Positive Voltage Regulator
LA317
Absolute Maximum Ratings (Note1)
Symbol
Description
Ratings
Unit
VIN
TJ
TSTG
TLEAD
ESD (Human Body Model)
Input Voltage
Junction Temperature
Storage Temperature Range
Lead Temperature (Solding,10 Seconds)
ESD
20
150
-65 to 150
300
4000
V
°C
°C
°C
V
Recommend Operating Ratings(Note1)
Symbol
Description
VIN
TJ
Input Voltage
Operating Junction Temperatrue
Ratings
Min
Max
15
VO+2
0
125
Unit
V
°C
Note1: Absolute maximum ratings indicate limits beyond which damage to the device may occur.
Recommend operating ratings indicate conditions for which the devices is functional,but do not guarantee
specific specification limits. For guarantee specification and test conditions,see the Electrical Characteristics,
the guarantee specification apply only for the test conditions listed.Some performance characteristics may
degrade when the device is not operated under the listed test conditions.
Electrical Characteristics (TA=25°C, PD≤Pmax,unless otherwise specified), (Note2)
Symbol
Description
Min.
Typ.
Max.
Unit
VREF
Reference Voltage
1.20
1.25
1.30
V
∆VLINE
∆VLOAD
VD
ILIMIT
IADJ
Line Regulation
Load Regulation
Thermal Regulation
Dropout Voltage
Current Limit
Adjustable Pin Current
1.2
-
0.01
0.2
0.04
1.2
1.5
50
0.04
0.4
0.07
1.3
1.8
100
%/V
%
%/W
V
A
uA
∆IADJ
Adjustable Pin Current Change
-
0.2
5.0
uA
Minimum Load Current
RMS Output Noise Voltage
(% of Vo)
Power Supply Ripple Rejection
Ratio
-
3.5
10
mA
3V≤VIN-VO≤10V,
10mA≤Io≤1A
3V≤VIN-VO≤10V, Io≤20mA
VIN-VO=2V, 10mA≤Io≤1A
20ms Pulse
Io=1A
VIN-VO=2V
1.4V≤VIN-VO≤10V,
10mA≤Io≤1A
3V≤VIN-VO≤15V
-
0.003
-
%
10Hz≤f≤10KHz
60
75
-
dB
ILOAD
eN
PSRR
Test Conditions
VIN-VO=3V, Io=1A ,
Co=1uF,Tantalum,f=120Hz
Rev. A/LX
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Page 4 of 13
1A Adjustable Positive Voltage Regulator
LA317
-
Temperature Stability
Long Term Stability
Thermal Shuntdown
Thermal Resisitance
Junction to case
-
1
0.3
150
4.5
15
10
4
-
%
%
°C
°C/W
TA=125°C,1000Hrs
T:TO-220
H: SOT-223
D:DPAK (TO-252)
MC:D2PAK (TO-263)
Note2:Maximum power temperature is package type and case temperature dependent.please see fig 6.
Typical Characteristics Curves
Fig.1 VD-IO
Dropout Voltage VD (V)
Load regulation ∆VLOAD (%)
Fig.2 ∆VLOAD -TA
Operation Ambient Temperature TA (°C)
Output Current IO (A)
Fig.4 VO- TA
VO=3.3V
IO=30mA
Operation Ambient Temperature TA (°C)
Output Voltage VO (V)
Fig.3 VREF-TA
Reference Voltage VREF (V)
VO=3.3V
VO=3.3V
IO=30mA
Operation Ambient Temperature TA (°C)
Rev. A/LX
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Page 5 of 13
1A Adjustable Positive Voltage Regulator
LA317
VO=3.3V
Fig.6 IADJ-TA
Adjust Pin Current IADJ (uA)
Minimum Load Current ILOAD (mA)
Fig.5 ILOAD(Min)-TA
Operation Ambient Temperature TA (°C)
Operation Ambient Temperature TA (°C)
Fig.8 PD- TA
Power Dissipation PD (W)
Short -Circuit Current ISHORT (A)
Fig.7 ISHORT-TA
Operation Ambient Temperature TA (°C)
VO=3.3V
IO=30mA
SOT-223
Operation Ambient Temperature TA (°C)
Rev. A/LX
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Page 6 of 13
1A Adjustable Positive Voltage Regulator
LA317
Power Supply Rejection Ratio
PSRR (dB)
Fig.9 PSRR-f
VIN=8.3V
VO=3.3V
Frequency f (Hz)
Fig.10 Line Transient Reponse
Fig.11 Load Transient Reponse
VIN=4.8V,VO=3.33V ,CIN=1uF,CO=10uF (TAN)
VIN=4.8V,VO=3.33V ,CIN=CO=10uF (TAN),Preload=0.1A
VO
VIN=5.8V
VIN=4.8V
IO=0.5A
IO=0.1A
Rev. A/LX
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Page 7 of 13
1A Adjustable Positive Voltage Regulator
LA317
Typical Application Circuit
Notes:CIN is required if the regulator is located close to the power supply filter
CO is needed for stability and it improves transient response.
VO=VREF× (1+R2/R1) + IADJ ×R2
Since IADJ is controlled to less than 100uA, the error associated with this item is negligible in most
applications.
Rev. A/LX
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Page 8 of 13
1A Adjustable Positive Voltage Regulator
LA317
Dimensions in mm (inch)
Rev. A/LX
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Page 9 of 13
1A Adjustable Positive Voltage Regulator
LA317
SOT-223
Rev. A/LX
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Page 10 of 13
1A Adjustable Positive Voltage Regulator
LA317
DPAK
(TO-252)
Rev. A/LX
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Page 11 of 13
1A Adjustable Positive Voltage Regulator
LA317
D2PAK
(TO-263)
Rev. A/LX
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Page 12 of 13
1A Adjustable Positive Voltage Regulator
LA317
How to contact us:
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Tel: (800) TAITRON (800) 824-8766 (661) 257-6060
Fax: (800) TAITFAX (800) 824-8329 (661) 257-6415
Email: [email protected]s.com
Http://www.taitroncomponents.com
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Tel: +86-21-5424-9942
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Rev. A/LX
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Page 13 of 13