1A Low Dropout Positive Voltage Regulator LM2940 Series 1A Low Dropout Positive Voltage Regulator General Description • The LM2940 is a low dropout regulator designed to provide output current up to 1A with a typically 500mV dropout Voltage and a maximum of 1V. It is capable of reducing the ground current when the differential between the input voltage and the output voltage outrun 3V. • The LM2940 offers low quiescent current (typically 30mA at 1A and an input-output differential of 5V). Higher quiescent currents only exist when the regulator is in the dropout mode (VIN-VOUT≤3V). Features • • • • • • 500mV typically dropout at 1A Output current in excess of 1A Low quiescent current Reversed-battery protection Current limit and thermal shutdown. Mirror image insertion protection Ordering Information LM2940 □□ - □□□ - 85 - □□□□ Circuit Type Io=1A Packing Code TU: Tube, RoHS UG: Tube, RoHS & Halogen Free TR30: 13” Reel, RoHS RG30: 13” Reel, RoHS & Halogen Free Outline MC: D2PACK (TO-263) M: D2PACK-3 (TO-263-3) T: TO-220 D: DPACK (TO-252) H: SOT-223 Factory Location Code Output Voltage 5: Fixed Output 5V 9: Fixed Output 9V 15: Fixed Output 15V 6: Fixed Output 6V 10: Fixed Output 10V 8: Fixed Output 8V 12: Fixed Output 12V 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/AH Page 1 of 24 1A Low Dropout Positive Voltage Regulator LM2940 Series Marking Information Outline Temperature Range PN LM2940MC-xxx-85-TU 2 D PACK -40 to 125°C LM2940MC-xxx-85-UG LM2940MC-xxx-85-TR30 LM2940MC-xxx-85-RG30 LM2940M-xxx-85-TU 2 D PACK-3 -40 to 125°C LM2940M-xxx-85-UG LM2940M-xxx-85-TR30 LM2940M-xxx-85-RG30 TO-220 -40 to 125°C LM2940T-xxx-85-TU LM2940T-xxx-85-UG LM2940D-xxx-85-TU DPACK -40 to 125°C LM2940D-xxx-85-UG LM2940D-xxx-85-TR30 LM2940D-xxx-85-RG30 Marking Code Packing Type Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube LM2940H-xxx-85-TR30 SOT-223 -40 to 85°C Tape & Reel LM2940H-xxx-85-RG30 Note: 1. ‘xxx’ means output voltage. Pin Configuration 1: INPUT 2: GND 3: OUTPUT Rev. A/AH www.taitroncomponents.com Page 2 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Absolute Maximum Ratings Symbol Description VIN Input Voltage PD Power Dissipation TJ Junction Temperature TOPR TSTG θJA θJC Ratings Unit 26 V Internally limited 150 °C TO-220/TO-263-3/TO-263 -40 ~ +125 °C SOT-223 -40 ~ +85 °C -65 ~ +150 °C Operating Temperature Storage Temperature Range Junction-to-Ambient Junction-to-Case SOT-223 174 TO-263/TO-263-3 80 TO-220 60 TO-263/TO-263-3 4 °C/W TO-220 4 °C/W °C/W Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. 2. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Rev. A/AH www.taitroncomponents.com Page 3 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Electrical Characteristics (Ta = TJ = 25°C, VIN = VOUT+5V, IOUT = 1A and COUT = 22µF, unless otherwise specified.) LM2940XX-5.0V Symbol Description Min. Typ. Max. Unit Conditions VOUT Output Voltage 4.85 5.00 5.15 V 6.25V≤VIN≤26V, 5mA≤IOUT≤1A ∆VOUT Line Regulation - 20 50 mV VOUT+2V≤VIN≤26V, IOUT=5mA ∆VOUT Load Regulation - 35 50 mV 50mA≤IOUT≤1A ROUT Output Impedance - 35 - mΩ 100mA DC and 20mArms, fo=120Hz IQ Quiescent Current - 10 15 mA VOUT+2V≤VIN≤26V, IOUT=5mA eN Output Noise Voltage - 150 - µVrms RR Ripple Rejection 54 72 - dB - 20 - mV/1000Hr - 0.5 0.8 Long-Term Stability VD ISC TIN VRIN VTRRI Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage 10Hz-100kHz, IOUT=5mA fo=120Hz, 1Vrms, IOUT=100mA IOUT=1A V IOUT=100mA - 0.13 0.15 - 2.5 - A (Note) 60 75 - V ROUT=100Ω, T≤100ms -15 -30 - V ROUT=100Ω -50 -75 - V ROUT=100Ω, T≤100ms Rev. A/AH www.taitroncomponents.com Page 4 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series LM2940XX -6.0V Symbol Description Min. Typ. Max. Unit Conditions VOUT Output Voltage 5.82 6.00 6.18 V 7.5V≤VIN≤26V, 5mA≤IOUT≤1A ∆VOUT Line Regulation - 20 60 mV VOUT+2V≤VIN≤26V, IOUT=5mA ∆VOUT Load Regulation - 40 60 mV 50mA≤IOUT≤1A ROUT Output Impedance - 40 - mΩ 100mA DC and 20mArms, fo=120Hz IQ Quiescent Current - 10 15 mA VOUT+2V≤VIN≤26V, IOUT=5mA eN Output Noise Voltage - 180 - µVrms RR Ripple Rejection 60 72 - dB - 20 - mV/1000Hr - 0.5 0.8 Long-Term Stability VD ISC TIN VRIN VTRRI Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage 10Hz-100kHz, IOUT=5mA fo=120Hz, 1Vrms, IOUT=100mA IOUT=1A V IOUT=100mA - 0.13 0.15 - 2.5 - A (Note) 60 75 - V ROUT=100Ω, T≤100ms -15 -30 - V ROUT=100Ω -50 -75 - V ROUT=100Ω, T≤100ms Rev. A/AH www.taitroncomponents.com Page 5 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series LM2940XX-8.0V Symbol Description Min. Typ. Max. Unit Conditions VOUT Output Voltage 7.76 8.00 8.24 V 9.4V≤VIN≤26V, 5mA≤IOUT≤1A ∆VOUT Line Regulation - 20 80 mV VOUT+2V≤VIN≤26V, IOUT=5mA ∆VOUT Load Regulation - 55 80 mV 50mA≤IOUT≤1A ROUT Output Impedance - 55 - mΩ 100mA DC and 20mArms, fo=120Hz IQ Quiescent Current - 10 15 mA VOUT+2V≤VIN≤26V, IOUT=5mA eN Output Noise Voltage - 240 - µVrms RR Ripple Rejection 54 66 - dB - 32 - mV/1000Hr - 0.5 0.8 Long-Term Stability VD ISC TIN VRIN VTRRI Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage 10Hz-100kHz, IOUT=5mA fo=120Hz, 1Vrms, IOUT=100mA IOUT=1A V IOUT=100mA - 0.13 0.15 - 2.5 - A (Note) 60 75 - V ROUT=100Ω, T≤100ms -15 -30 - V ROUT=100Ω -50 -75 - V ROUT=100Ω, T≤100ms Rev. A/AH www.taitroncomponents.com Page 6 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series LM2940XX-9.0V Symbol Description Min. Typ. Max. Unit Conditions VOUT Output Voltage 8.73 9.00 9.27 V 10.5V≤VIN≤26V, 5mA≤IOUT≤1A ∆VOUT Line Regulation - 20 90 mV VOUT+2V≤VIN≤26V, IOUT=5mA ∆VOUT Load Regulation - 60 90 mV 50mA≤IOUT≤1A ROUT Output Impedance - 60 - mΩ 100mA DC and 20mArms, fo=120Hz IQ Quiescent Current - 10 15 mA VOUT+2V≤VIN≤26V, IOUT=5mA eN Output Noise Voltage - 270 - µVrms RR Ripple Rejection 52 64 - dB - 34 - mV/1000Hr - 0.5 0.8 Long-Term Stability VD ISC TIN VRIN VTRRI Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage 10Hz-100kHz, IOUT=5mA fo=120Hz, 1Vrms, IOUT=100mA IOUT=1A V IOUT=100mA - 0.13 0.15 - 2.5 - A (Note) 60 75 - V ROUT=100Ω, T≤100ms -15 -30 - V ROUT=100Ω -50 -75 - V ROUT=100Ω, T≤100ms Rev. A/AH www.taitroncomponents.com Page 7 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series LM2940XX-10V Symbol Description Min. Typ. Max. Unit Conditions VOUT Output Voltage 9.70 10.00 10.30 V 11.5V≤VIN≤26V, 5mA≤IOUT≤1A ∆VOUT Line Regulation - 20 100 mV VOUT+2V≤VIN≤26V, IOUT=5mA ∆VOUT Load Regulation - 65 100 mV 50mA≤IOUT≤1A ROUT Output Impedance - 65 - mΩ 100mA DC and 20mArms, fo=120Hz IQ Quiescent Current - 10 15 mA VOUT+2V≤VIN≤26V, IOUT=5mA eN Output Noise Voltage - 300 - µVrms RR Ripple Rejection 51 63 - dB - 36 - mV/1000Hr - 0.5 0.8 Long-Term Stability VD ISC TIN VRIN VTRRI Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage 10Hz-100kHz, IOUT=5mA fo=120Hz, 1Vrms, IOUT=100mA IOUT=1A V IOUT=100mA - 0.13 0.15 - 2.5 - A (Note) 60 75 - V ROUT=100Ω, T≤100ms -15 -30 - V ROUT=100Ω -50 -75 - V ROUT=100Ω, T≤100ms Rev. A/AH www.taitroncomponents.com Page 8 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series LM2940XX-12V Symbol Description Min. Typ. Max. Unit Conditions VOUT Output Voltage 11.64 12.00 12.36 V 13.6V≤VIN≤26V, 5mA≤IOUT≤1A ∆VOUT Line Regulation - 20 120 mV VOUT+2V≤VIN≤26V, IOUT=5mA ∆VOUT Load Regulation - 55 120 mV 50mA≤IOUT≤1A ROUT Output Impedance - 80 - mΩ 100mA DC and 20mArms, fo=120Hz IQ Quiescent Current - 10 15 mA VOUT+2V≤VIN≤26V, IOUT=5mA eN Output Noise Voltage - 360 - µVrms RR Ripple Rejection 54 66 - dB - 48 - mV/1000Hr - 0.5 0.8 Long-Term Stability VD ISC TIN VRIN VTRRI Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage 10Hz-100kHz, IOUT=5mA fo=120Hz, 1Vrms, IOUT=100mA IOUT=1A V IOUT=100mA - 0.11 0.15 - 2.5 - A (Note) 60 75 - V ROUT=100Ω, T≤100ms -15 -30 - V ROUT=100Ω -50 -75 - V ROUT=100Ω, T≤100ms Rev. A/AH www.taitroncomponents.com Page 9 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series LM2940XX-15V Symbol Description Min. Typ. Max. Unit Conditions VOUT Output Voltage 14.55 15.00 15.45 V ∆VOUT Line Regulation - 20 150 mV VOUT+2V≤VIN≤26V, IOUT=5mA ∆VOUT Load Regulation - 70 150 mV 50mA≤IOUT≤1A ROUT Output Impedance - 100 - mΩ 100mA DC and 20mArms, fo=120Hz IQ Quiescent Current - 10 15 mA VOUT+2V≤VIN≤26V, IOUT=5mA eN Output Noise Voltage - 450 - µVrms RR Ripple Rejection 52 64 - dB - 60 - mV/1000Hr - 0.5 0.8 Long-Term Stability VD ISC Dropout Voltage Short Circuit Current 16.75V≤VIN≤26V, 5mA≤IOUT≤1A 10Hz-100kHz, IOUT=5mA fo=120Hz, 1Vrms, IOUT=100mA IOUT=1A V - 0.11 0.15 - 2.5 - IOUT=100mA A (Note) Maximum Line 60 75 V ROUT=100Ω, T≤100ms Transient Reverse Polarity DC -15 -30 V ROUT=100Ω VRIN Input Voltage Reverse Polarity -50 -75 V ROUT=100Ω, T≤100ms VTRRI Transient Input Voltage Note: Output current will decrease with temperature increase but will not drop below 1A at the maximum specified temperature. TIN Typical Application Note: 1. C1 is required if regulator is located far from power supply filter. 2. CO must be higher than 22μF for stability, and locate as close as possible to the regulator. Rev. A/AH www.taitroncomponents.com Page 10 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Typical Characteristics Curves Fig.2- Dropout Voltage vs. Temperature Dropout Voltage (V) Input-Output Differential (V) Fig.1- Dropout Voltage vs. Output Current Temperature (°C) Output Current (mA) Fig.4-Quiescent Current vs. Temperature Output Voltage (V) Quiescent Current (mA) Fig.3- Output Voltage vs. Temperature Temperature (°C) Temperature (°C) Rev. A/AH www.taitroncomponents.com Page 11 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Fig.6- Quiescent Current vs. Load Current Quiescent Current (mA) Quiescent Current (mA) Fig.5- Quiescent Current vs. Input Voltage Input Voltage (V) Load Current (A) Fig.8- Load Transient Response Load Current(A) Input Voltage Change(V) Output Voltage Deviation(mV) Output Voltage Deviation(V) Fig.7- Line Transient Response Time (µS) Time (µS) Rev. A/AH www.taitroncomponents.com Page 12 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Fig.10- Low Voltage Behavior Output Voltage (V) Ripple Rejection (dB) Fig.9- Ripple Rejection vs. Frequency Frequency (Hz) Input Voltage (V) Fig.12- Low Voltage Behavior Output Voltage (V) Output Voltage (V) Fig.11- Low Voltage Behavior Input Voltage (V) Input Voltage (V) Rev. A/AH www.taitroncomponents.com Page 13 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Fig.14- Low Voltage Behavior Output Voltage (V) Output Voltage (V) Fig.13- Low Voltage Behavior Input Voltage (V) Input Voltage (V) Fig.16- Output at Voltage Extremes Output Voltage (V) Output Voltage (V) Fig.15- Low Voltage Behavior Input Voltage (V) Input Voltage (V) Rev. A/AH www.taitroncomponents.com Page 14 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Fig.18- Output at Voltage Extremes Output Voltage (V) Output Voltage (V) Fig.17- Output at Voltage Extremes Input Voltage (V) Input Voltage (V) Fig.20- Output at Voltage Extremes Output Voltage (V) Output Voltage (V) Fig.19- Output at Voltage Extremes Input Voltage (V) Input Voltage (V) Rev. A/AH www.taitroncomponents.com Page 15 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Fig.22- Output Capacitor ESR Output Voltage (V) Equivalent Series Resistance (Ω) Fig.21- Output at Voltage Extremes Input Voltage (V) Out Current (mA) Fig.24- Output Impedance Output Current(A) Output Impedance (Ω) Fig.23- Peak Output Current Temperature (°C) Frequency (Hz) Rev. A/AH www.taitroncomponents.com Page 16 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Fig.26- Maximum Power Dissipation (D2PACK-3) Power Dissipation (W Power Dissipation (W) Fig.25- Maximum Power Dissipation (TO-220) Ambient Temperature (°C) Ambient Temperature (°C) Rev. A/AH www.taitroncomponents.com Page 17 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series Dimensions in mm & inches D2PACK (TO-263) Rev. A/AH www.taitroncomponents.com Page 18 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series D2PACK-3 (TO-263-3) Rev. A/AH www.taitroncomponents.com Page 19 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series TO-220 Rev. A/AH www.taitroncomponents.com Page 20 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series DPACK (TO-252) Rev. A/AH www.taitroncomponents.com Page 21 of 23 1A Low Dropout Positive Voltage Regulator LM2940 Series SOT-223 Rev. A/AH www.taitroncomponents.com Page 22 of 23 1A Low Dropout Positive Voltage Regulator LM2940 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/AH www.taitroncomponents.com Page 23 of 23