Adjustable Positive Voltage Regulator LM317
Adustable Positive Voltage Regulator
General Description
• The LM317 is an adjustable 3-terminal positive voltage regulator, designed to supply 1A of output current with . voltage adjustable from 1.3V ~ 37V. • The LM317 is available in SOT-223, D-PACK, TO-220 and D2-PACK packages. SOT-223 D-PACK (TO-252)
TO-220
D2-PACK (TO-263)
Features
• • • • Output Voltage adjustable from 1.3V ~ 37V Output current in excess of 1A Internal short circuit protection Internal over temperature protection
Applications
• PC Motherboard • LCD Monitor • Graphic Card • • • • DVD Player Network Interface Card/Switch Telecom Equipment Printer and other Peripheral Equipment
• Output transistors safe area compensation • RoHS Compliance
Ordering Information
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/DX 2007-06-04 Page 1 of 8
Adjustable Positive Voltage Regulator LM317
Pin Configuration
Outline: H SOT-223
Outline: D D-PACK (TO-252)
Outline: T TO-220
Outline: MC D2-PACK (TO-263)
Block Diagram
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Adjustable Positive Voltage Regulator LM317
Absolute Maximum Ratings (Ta=25° C, unless otherwise specified)
Symbol VIN-VOUT IO TJ TOPR TSTG PD Description Input - Output Voltage Differential Max. Output Current Operating Junction Temperature Operating Temperature Range Storage Temperature Range Power Dissipation Thermal Resistance Junction-Case T: TO-220 MC: D2-PACK (TO-263) D: D-PACK (TO-252) H: SOT-223 T: TO-220 MC: D2-PACK (TO-263) D: D-PACK (TO-252) H: SOT-223 Ratings 40 1.0 125 -40 ~ 85 -40 ~ 150 Internal limited 5 5 12 23 54 64 112 165 Unit V A °C °C °C mW
RthJC
° C/W
RthJA
Thermal Resistance Junction-Ambient
° C/W
Note: Absolute maximum ratings are stress ratings only and functional device operation is not
implied. The device could be damaged beyond Absolute maximum ratings.
Electrical Characteristics
(VIN-VOUT=5V, IOUT=10mA, TA=25ºC, unless otherwise specified) Symbol ∆VOUT/VOUT ∆VOUT IADJ ∆IADJ VREF Description Line Regulation Load Regulation Adjustable Pin Current Adjustable Pin Current Change Reference Input Voltage Temperature Stability LM317
Min. Typ. Max.
Unit %/V mV mV µA µA V %/VOUT
Conditions 3V≤VIN-VOUT≤40V 10mA≤IOUT≤1A, VOUT≤5V 10mA≤IOUT≤1A, VOUT≥5V 3V≤VIN-VOUT≤40V,
1.20 -
0.01 5 0.1 50 0.2 1.25 0.7
0.04 25 0.5 100 5 1.30 -
10mA≤IOUT≤1A, PD≤20W 3V≤VIN-VOUT≤40V, 10mA≤IOUT≤1A, PD≤20W
TMIN≤TJ≤TMAX
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Adjustable Positive Voltage Regulator LM317
Symbol IL(MIN) IO(MAX) eN RR Description Minimum Load Current for Regulation Maximum Output Current RMS Noise vs. %of VOUT Ripple Rejection CADJ=0 CADJ=10µF LM317
Min. Typ. Max.
Unit mA A %/VOUT dB
Conditions VIN-VOUT=40V VIN-VOUT=40V, PD≤20W 10Hz≤f≤10KHz VOUT=10V, f=120Hz
0.3 66
3.5 0.4 0.003 65 80
10 -
Note: CADJ is connected between Adjust pin and Ground. Typical Characteristics Curves
∆VOUT, Output Voltage Deviation (%)
Fig.1- Load Regulation vs. Temperature IADJ, Adjustment Current (µA) Temperature (° C) Fig.3- Current Limit IOUT, Min. Output Current (mA) IOUT, Output Current (mA) Fig.2- Adjustment Current vs. Temperature
Temperature (° C) Fig.4- Minimum Operating Current
VIN-VOUT (V)
VIN-VOUT (V) Rev. A/DX 2007-06-04
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Page 4 of 8
Adjustable Positive Voltage Regulator LM317
Typical Application
Fig.5-Programmable Voltage Regulator
Fig.6- Regulator with On-off Control
Fig.7- Soft Start Application
Fig.8- Constant Current Application
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Adjustable Positive Voltage Regulator LM317
Dimensions in inches (mm)
SOT-223
D-PACK (TO-252)
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Adjustable Positive Voltage Regulator LM317
TO-220
D2-PACK (TO-263)
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Adjustable Positive Voltage Regulator LM317
How to contact us:
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
CROSS REGION PLAZA, 899 LINGLING ROAD, SUITE 18C, SHANGHAI, 200030, CHINA Tel: +86-21-5424-9942 Fax: +86-21-5424-9931
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