1A Ultra Low Dropout Voltage Regulator LD2940 Series 1A Ultra Low Dropout Voltage Regulator General Description TO-220 • The LD2940 is a low dropout three-terminal regulator with a typical dropout of 280mV at 1A output current. • The LD2940 provides current limit and thermal shutdown. On-chip thermal shutdown provides protection against any combination of high current and ambient temperature that would create excessive junction temperatures. TO-263-3 • The LD2940 has 1.2V, 1.8V, 2.5V, 3.3V and 5.0V versions. • The LD2940 series is available in the industry standard TO-220, TO-263-3, DPAK(TO-252) and SOT-223 power packages. (Detailed information please refer to page 2 &3) SOT-223 Features • Minimum Guaranteed Output Current: 1A • Dropout Voltage at IOUT=1A: 280mV Typ. (Except 1.2V and 1.8V Versions) • • • • • DPAK (TO-252) Output Accuracy: ± 1% Low Ground Current Internal Current Limit and Thermal Protection Reversed-battery and Reversed-lead Insertion Protection Fast Transient Response Applications • • • • • • • LCD TV Set Top Box LCD Monitor SMPS Post Regulator Laptop, Palmtop and Notebook Portable Instrumentation USB Power Supply 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/CH Page 1 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Ordering Information LD2940 □□ - □□□ - 08 - □□□□ Packing Code TR30: 13” Reel, RoHS RG30: 13” Reel, RoHS & Halogen Free TU: Tube, RoHS UG: Tube, RoHS & Halogen Free Circuit Type Io=1A, Vimax=16V Outline T: TO-220 M: TO-263-3 D: DPAK(TO-252) H: SOT-223 Factory Location Code 1.2: Fixed Output 1.2V 1.8: Fixed Output 1.8V 2.5: Fixed Output 2.5V 3.3: Fixed Output 3.3V 5.0: Fixed Output 5.0V Marking Information Outline TO-220 TO-263-3 Temperature Range PN ROHS Halogen Free LD2940T-3.3-08-TU LD2940T-3.3-08-UG LD2940T-5.0-08-TU LD2940T-5.0-08-UG LD2940M-3.3-08-TU LD2940M-3.3-08-UG LD2940M-3.3-08-TR30 LD2940M-3.3-08-RG30 LD2940M-5.0-08-TU LD2940M-5.0-08-UG LD2940M-5.0-08-TR30 LD2940M-5.0-08-RG30 -40°C to 125°C -40°C to 125°C Marking Code Halogen ROHS Free AZ2940T -3.3E1 AZ2940T -5.0E1 AZ2940S -3.3E1 AZ2940S -3.3E1 AZ2940S -5.0E1 AZ2940S -5.0E1 LD2940D-1.2-08-UG LD2940D-1.2-08-RG30 DPAK (TO-252) LD2940D-1.8-08-TU LD2940D-1.8-08-UG LD2940D-1.8-08-TR30 LD2940D-1.8-08-RG30 LD2940D-2.5-08-TU LD2940D-2.5-08-UG LD2940D-2.5-08-TR30 LD2940D-2.5-08-RG30 -40°C to 125°C AZ2940D -1.8E1 AZ2940D -1.8E1 AZ2940D -2.5E1 AZ2940D -2.5E1 AZ2940T -3.3G1 AZ2940T -5.0G1 AZ2940S -3.3G1 AZ2940S -3.3G1 AZ2940S -5.0G1 AZ2940S -5.0G1 AZ2940D -1.2G1 AZ2940D -1.2G1 AZ2940D -1.8G1 AZ2940D -1.8G1 AZ2940D -2.5G1 AZ2940D -2.5G1 Packing Type Tube Tube Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Rev. A/CH www.taitroncomponents.com Page 2 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Outline DPAK (TO-252) SOT-223 Temperature Range PN ROHS Marking Code Halogen Free ROHS LD2940H-1.2-08-RG30 AZ2940D -3.3G1 AZ2940D -3.3G1 AZ2940D -5.0G1 AZ2940D -5.0G1 GH12B LD2940H-1.8-08-RG30 GH12F LD2940H-2.5-08-RG30 GH12G LD2940H-3.3-08-RG30 GH12H LD2940H-5.0-08-RG30 GH12J LD2940D-3.3-08-TU LD2940D-3.3-08-UG LD2940D-3.3-08-TR30 LD2940D-3.3-08-RG30 LD2940D-5.0-08-TU LD2940D-5.0-08-UG LD2940D-5.0-08-TR30 LD2940D-5.0-08-RG30 -40°C to 125°C -40°C to 125°C AZ2940D -3.3E1 AZ2940D -3.3E1 AZ2940D -5.0E1 AZ2940D -5.0E1 Halogen Free Packing Type Tube Tape & Reel Tube Tape & Reel Tape & Reel Pin Configuration (Top View) TO-220 TO-263-3 DPAK(TO-252) SOT-233 Rev. A/CH www.taitroncomponents.com Page 3 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Pin Description Pin Number Pin Name Function 1 VIN 2 GND Ground pin. This pin and TAB are internally connected 3 VOUT Regulated output Unregulated Input Functional Block Diagram Rev. A/CH www.taitroncomponents.com Page 4 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Absolute Maximum Ratings (Note 1) Symbol Description Ratings Unit VIN Input Voltage 16 V TJ Operating Junction Temperature 150 °C TSTG Storage Temperature Range -65 to 150 °C TLEAD (10 sec) Lead Soldering Temperature 260 °C θJA Thermal Resistance TO-220 60 TO-263-3 DPAK (TO-252) SOT-223 60 100 °C/W 120 ESD ESD (Machine model) 300 V ESD ESD (Human Body model) 5000 V Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Symbol Description Min. Max. Unit VIN Input Voltage 2.5 13.2 V TJ Operating Junction Temperature -40 125 °C Rev. A/CH www.taitroncomponents.com Page 5 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Electrical Characteristics For LD2940-1.2 (VIN=2.5V, IOUT=10mA, CIN=10μF, COUT=10μF, TJ=25°C, Bold typeface applies over 40oC≤TJ≤125oC, unless otherwise specified.) Symbol Description Min. Typ. Max. 1.188 1.2 1.212 1.176 Unit IOUT=10mA VOUT Output Voltage 1.2 1.224 VRLINE Line Regulation 3.6 18 mV IOUT=10mA, 2.5V≤VIN≤13.2V VRLOAD Load Regulation 5.4 27 mV VIN=2.5V, 10mA≤IOUT≤1A 180 µV/°C ∆VOUT/∆T IGND ISC ILOAD(MIN) Out Voltage Temperature Coefficient Short Circuit Current Minimum Load Current Output Noise Voltage (rms) θJC 12 Ground Current Thermal Resistance 25 18 1.5 2.2 1 400 7.8 29.7 V Conditions mA A 5 10mA≤IOUT≤1A, 2.5V≤VIN≤13.2V IOUT=10mA VIN=2.5V IOUT=750mA IOUT=1A VOUT=0V (Note 2) mA µV °C/W 10Hz to 100KHz, IOUT=100mA, COUT=10µF DPAK(TO-252) SOT-223 Note 2: VIN=VOUT(NOMINAL)+1V Rev. A/CH www.taitroncomponents.com Page 6 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series For LD2940-1.8 (VIN=2.8V, IOUT=10mA, CIN=10μF, COUT=10μF, TJ=25°C, Bold typeface applies over 40oC≤TJ≤125oC, unless otherwise specified.) Symbol VOUT Description Output Voltage Min. Typ. Max. 1.782 1.8 1.818 1.764 1.8 1.836 Unit V Conditions IOUT=10mA 10mA≤IOUT≤1A, 2.8V≤VIN≤13.2V VRLINE Line Regulation 3.6 18 mV IOUT=10mA, 2.8V≤VIN≤13.2V VRLOAD Load Regulation 5.4 27 mV VIN=2.8V, 10mA≤IOUT≤1A ∆VOUT/∆T Out Voltage Temperature Coefficient 36 180 µV/°C IOUT=10mA VDROP Dropout Voltage (Note 3) 290 500 330 750 mV ∆VOUT=1% 12 25 mA VIN=2.8V IGND ISC ILOAD(MIN) Ground Current Short Circuit Current Minimum Load Current Output Noise Voltage (rms) θJC Thermal Resistance 18 1.5 2.2 1 400 7.8 29.7 A 5 IOUT=100mA IOUT=1A IOUT=750mA IOUT=1A VOUT=0V (Note 2) mA µV °C/W 10Hz to 100KHz, IOUT=100mA, COUT=10µF DPAK(TO-252) SOT-223 Note 2: VIN=VOUT(NOMINAL)+1V Note 3: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value which is measured at VOUT+1V applied to VIN. In application, VIN should be no less than 2.5V. Rev. A/CH www.taitroncomponents.com Page 7 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series For LD2940-2.5 (VIN=3.5V, IOUT=10mA, CIN=10μF, COUT=10μF, TJ=25°C, Bold typeface applies over 40oC≤TJ≤125oC, unless otherwise specified.) Symbol VOUT Description Output Voltage Min. Typ. Max. 2.475 2.5 2.525 2.45 2.5 2.55 Unit V Conditions IOUT=10mA 10mA≤IOUT≤1A, 3.5V≤VIN≤13.2V VRLINE Line Regulation 5.0 25 mV IOUT=10mA, 3.5V≤VIN≤13.2V VRLOAD Load Regulation 7.5 37.5 mV VIN=3.5V, 10mA≤IOUT≤1A ∆VOUT/∆T Out Voltage Temperature Coefficient 50 250 µV/°C IOUT=10mA VDROP Dropout Voltage (Note 4) 70 200 280 550 mV ∆VOUT=1% 12 25 mA VIN=3.5V IGND ISC ILOAD(MIN) Ground Current Short Circuit Current Minimum Load Current Output Noise Voltage (rms) θJC Thermal Resistance 18 1.5 2.2 1 400 7.8 29.7 A 5 IOUT=100mA IOUT=1A IOUT=750mA IOUT=1A VOUT=0V (Note 2) mA µV °C/W 10Hz to 100KHz, IOUT=100mA, COUT=10µF DPAK(TO-252) SOT-223 Note 2: VIN=VOUT(NOMINAL)+1V Note 4: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value which is measured at VOUT+1V applied to VIN. Rev. A/CH www.taitroncomponents.com Page 8 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series For LD2940-3.3 (VIN=4.3V, IOUT=10mA, CIN=10μF, COUT=10μF, TJ=25°C, Bold typeface applies over 40oC≤TJ≤125oC, unless otherwise specified.) Symbol VOUT Description Output Voltage Min. Typ. Max. 3.27 3.3 3.33 3.23 3.3 3.37 Unit V Conditions IOUT=10mA 10mA≤IOUT≤1A, 3.5V≤VIN≤13.2V VRLINE Line Regulation 6.6 33 mV IOUT=10mA, 3.5V≤VIN≤13.2V VRLOAD Load Regulation 9.9 50 mV VIN=3.5V, 10mA≤IOUT≤1A ∆VOUT/∆T Out Voltage Temperature Coefficient 66 330 µV/°C IOUT=10mA VDROP Dropout Voltage (Note 4) 70 200 280 550 mV ∆VOUT=1% 12 25 mA VIN=3.5V IGND ISC ILOAD(MIN) Ground Current Short Circuit Current Minimum Load Current Output Noise Voltage (rms) 18 1.5 2.2 1 400 A 5 θJC Thermal Resistance 7.8 29.7 IOUT=1A IOUT=750mA IOUT=1A VOUT=0V (Note 2) mA µV 4.4 4.4 IOUT=100mA 10Hz to 100KHz, IOUT=100mA, COUT=10µF TO-220 °C/W TO-263-3 DPAK(TO-252) SOT-223 Note 2: VIN=VOUT(NOMINAL)+1V Note 4: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value which is measured at VOUT+1V applied to VIN. Rev. A/CH www.taitroncomponents.com Page 9 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series For LD2940-5.0 (VIN=6V, IOUT=10mA, CIN=10μF, COUT=10μF, TJ=25°C, Bold typeface applies over 40oC≤TJ≤125oC, unless otherwise specified.) Symbol VOUT Description Output Voltage Min. Typ. Max. 4.95 5.0 5.05 4.90 5.0 5.10 Unit V Conditions IOUT=10mA 10mA≤IOUT≤1A, 6V≤VIN≤13.2V VRLINE Line Regulation 10 50 mV IOUT=10mA, 6V≤VIN≤13.2V VRLOAD Load Regulation 15 75 mV VIN=6V, 10mA≤IOUT≤1A ∆VOUT/∆T Out Voltage Temperature Coefficient 100 500 µV/°C IOUT=10mA VDROP Dropout Voltage (Note 4) 70 200 280 550 mV ∆VOUT=1% 12 25 mA VIN=6V IGND ISC ILOAD(MIN) Ground Current Short Circuit Current Minimum Load Current Output Noise Voltage (rms) 18 1.5 2.2 1 400 A 5 θJC Thermal Resistance 7.8 29.7 IOUT=1A IOUT=750mA IOUT=1A VOUT=0V (Note 2) mA µV 4.4 4.4 IOUT=100mA 10Hz to 100KHz, IOUT=100mA, COUT=10µF TO-220 °C/W TO-263-3 DPAK(TO-252) SOT-223 Note 2: VIN=VOUT(NOMINAL)+1V Note 4: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value which is measured at VOUT+1V applied to VIN. Rev. A/CH www.taitroncomponents.com Page 10 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Typical Characteristics Curves Fig.2- Load Regulation Output Voltage (V) Output Voltage (V) Fig.1- Line Regulation Input Voltage (V) Output Current (mA) Fig.4- Ground Current vs. Input Voltage Ground Current (mA) Ground Current (mA) Fig.3- Ground Current vs. Output Current Output Current (mA) Input Voltage (V) Rev. A/CH www.taitroncomponents.com Page 11 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Fig.6- Ground Current vs. Junction Temperature Ground Current (mA) Dropout Voltage (mV) Fig.5- Dropout Voltage vs. Output Current Output Current (mA) Junction Temperature (°C) Fig.8- Ground Current vs. Junction Temperature Ground Current (mA) Ground Current (mA) Fig.7- Ground Current vs. Junction Temperature Junction Temperature (°C) Junction Temperature (°C) Rev. A/CH www.taitroncomponents.com Page 12 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Fig.10- Dropout Voltage vs. Junction Temperature Dropout Voltage (mV) Dropout Voltage (mV) Fig.9- Dropout Voltage vs. Junction Temperature Junction Temperature (°C) Junction Temperature (°C) Fig.11- Output Voltage vs. Junction Temperature Output Voltage (V) Output Capacitor ESR (Ω) Fig.12- Output Capacitor ESR vs. Output Current (mA) Junction Temperature (°C) Output Current (mA) Rev. A/CH www.taitroncomponents.com Page 13 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Fig.14- Load Transient Output Capacitor ESR (Ω) Fig.13- Output Capacitor ESR vs. Output Current (mA) Output Current (mA) Fig.15- Load Transient Fig.16- Line Transient Rev. A/CH www.taitroncomponents.com Page 14 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Fig.18- Power Dissipation vs. Case Temperature Power Dissipation (W) Power Dissipation (W) Fig.17- Power Dissipation vs. Case Temperature Case Temperature (°C) Case Temperature (°C) Power Dissipation (W) Fig.19- Power Dissipation vs. Case Temperature Case Temperature (°C) Rev. A/CH www.taitroncomponents.com Page 15 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Typical Applications Note 5: CIN is required if regulator is located far from power supply filter and is recommended to be 0.47μF or greater. To maintain stability, COUT is recommended to be 2.2μF or greater. The ESR of this capacitor is critical, please see curve. Rev. A/CH www.taitroncomponents.com Page 16 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series Dimensions in mm (inch) TO-220 Rev. A/CH www.taitroncomponents.com Page 17 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series TO-263-3 Rev. A/CH www.taitroncomponents.com Page 18 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series SOT-223 Rev. A/CH www.taitroncomponents.com Page 19 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series DPAK(TO-252) Rev. A/CH www.taitroncomponents.com Page 20 of 21 1A Ultra Low Dropout Voltage Regulator LD2940 Series 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: [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 METROBANK PLAZA, 1160 WEST YAN’ AN ROAD, SUITE 1503, SHANGHAI, 200052, CHINA Tel: +86-21-5424-9942 Fax: +86-21-5424-9931 Rev. A/CH www.taitroncomponents.com Page 21 of 21