1.0A Adjustable Positive Voltage Regulator LA317 1.0A Adustable Positive Voltage Regulator General Description • The LA317 is an adjustable 3-terminal positive voltage regulator with a very low dropout of 1.2V at 1A output current. Using 2 external resistors, the LA317 can provide an adjustable output voltage down to 1.25V. SOT-223 D-PACK (TO-252) • The LA317 is available in standard SOT-223, D-PACK, TO-220 and D2-PACK packages. TO-220 Features • • • • • • • D2-PACK (TO-263) Applications Typical 1% output voltage tolerance Typical 0.01%/V line reglation Typical 0.2% Load Regulation Very low dropout voltage: 1.2V at 1A output current Trimmed current limit On-chip thermal protection RoHS Compliance • • • • PC Motherboard LCD Monitor Graphic Card DVD Player • Network Interface Card/Switch • Telecom Equipment • Printer and other Peripheral Equipment 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 9 1.0A Adjustable Positive Voltage Regulator LA317 Pin Configuration Outline: H SOT-223 Outline: T TO-220 Outline: D D-PACK (TO-252) Outline: MC D2-PACK (TO-263) Block Diagram Rev. A/DX 2007-06-04 www.taitroncomponents.com Page 2 of 9 1.0A Adjustable Positive Voltage Regulator LA317 Absolute Maximum Ratings (Ta=25° C, unless otherwise specified) Symbol Description Ratings Unit VIN-VOUT IO Input - Output Voltage Differential Max. Output Current 15 1 V A TJ Operating Junction Temperature 150 °C TOPR TSTG Operating Temperature Range Storage Temperature Range 0 ~ 125 -65 ~ 150 °C °C TLEAD Lead Temperature (Soldering, 10sec.) 300 °C ESD ESD, Human Body Model (Max.) 4000 V Electrical Characteristics (Typicals and limits apply for TJ=25ºC, P≤ Maximum Power Dissipation unless otherwise specified)(Note) Symbol VREF Description Reference Input Voltage ∆VOUT/VOUT Line Regulation ∆VOUT Load Regulation LA317 Dropout Voltage Conditions Typ. Max. 1.20 1.25 1.30 V - 0.01 0.04 %/V IOUT≤20mA, 3V≤VIN-VOUT≤10V, - 0.2 0.4 % VIN-VOUT=2V, 10mA≤IOUT≤1A 0.04 0.07 %/W 20ms Pulse - 1.2 1.3 V IOUT=1A 1.2 1.5 1.8 A VIN-VOUT=2V - Thermal Regulation ∆V Unit Min. 10mA≤IOUT≤1A ≤VIN-VOUT≤10V, 3V ILIMIT Current Limit IADJ Adjustable Pin Current - 50 100 µA ∆IADJ Adjustable Pin Current Change - 0.2 5 µA IL(MIN) Minimum Load Current - 3.5 10 mA 3V≤VIN-VOUT≤15V PSRR Ripple Rejection 60 75 - dB f=120Hz, COUT=1µF Tantalum, VIN-VOUT=3V, IOUT=1A 1.4V≤VIN-VOUT≤10V, 10mA≤IOUT≤1A - Temperature Stability - 1 - % - - Long Term Stability - 0.3 - % TJ=125° C, 1000 Hours - RMS Output Noise (% of VOUT) - 0.003 - % TJ=25° C, 10Hz≤f≤10KHz Rev. A/DX 2007-06-04 www.taitroncomponents.com Page 3 of 9 1.0A Adjustable Positive Voltage Regulator LA317 Symbol Description Thermal Resistance Junction to Case - Thermal Shutdown - Note: LA317 Min. Typ. Max. - 15 - - 10 - - 4.5 - - 4 - - 150 - Unit Conditions SOT-223 ° C/W TO-252 TO-220 TO-263 °C Junction Temperature Thermal Shutdown °C Hysteresis Maximum Power Dissipation is Package Type and Case Temperature dependent. Pls see Fig.8. Typical Characteristics Curves Fig.1- Dropout Voltage vs. Output Current Output Voltage (V) Output Voltage Deviation (%) Fig.2- Load Regulation vs. Temperature Output Current (A) Ambient Temperature (° C) Fig.4- Output Voltage vs. Temperature Output Voltage (V) Reference Voltage (V) Fig.3- Reference Voltage vs. Temperature Ambient Temperature (° C) Ambient Temperature (° C) Rev. A/DX 2007-06-04 www.taitroncomponents.com Page 4 of 9 1.0A Adjustable Positive Voltage Regulator LA317 Typical Characteristics Curves (Continued) Fig.6- Adjust Pin Current vs. Temperature Adjust Current (µA) Minimum Load Current (mA) Fig.5- Minimum Load Current vs. Temperature Ambient Temperature (° C) Ambient Temperature (° C) Fig.8- Maximum Power Dissipation Power (W) Short-Circuit Current (A) Fig.7- Short-Circuit Current vs. Temperature Junction Temperature (° C) Case Temperature (° C) Rev. A/DX 2007-06-04 www.taitroncomponents.com Page 5 of 9 1.0A Adjustable Positive Voltage Regulator LA317 Typical Characteristics Curves (Continued) Fig.10- Line Transient Response Ripple Rejection (dB) ΔVOUT (200mV/Div) Fig.9- Ripple Rejection vs. Frequency Frequency (Hz) Time (200μs/Div) ΔVOUT (200mV/Div) Fig.11- Load Transient Response Time (200μs/Div) Rev. A/DX 2007-06-04 www.taitroncomponents.com Page 6 of 9 1.0A Adjustable Positive Voltage Regulator LA317 Typical Application Dimensions in inches (mm) SOT-223 Rev. A/DX 2007-06-04 www.taitroncomponents.com Page 7 of 9 1.0A Adjustable Positive Voltage Regulator LA317 Dimensions in inches (mm) (Continued) D-PACK (TO-252) TO-220 Rev. A/DX 2007-06-04 www.taitroncomponents.com Page 8 of 9 1.0A Adjustable Positive Voltage Regulator LA317 How to contact us: D2-PACK (TO-263) 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: [email protected] 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 Rev. A/DX 2007-06-04 www.taitroncomponents.com Page 9 of 9