LM2940

UNISONIC TECHNOLOGIES CO., LTD LM2940 1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR DESCRIPTION The UTC 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. UTC 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). LINEAR INTEGRATED CIRCUIT 1 TO-263 1 TO-263-3 1 TO-220 1 TO-252 1 SOT-223 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 *Pb-free plating product number: LM2940L ORDERING INFORMATION Order Number Normal Lead Free Plating LM2940-xx-AA3- R LM2940L-xx-AA3-R LM2940-xx-TA3-T LM2940L-xx-TA3-T LM2940-xx-TN3-R LM2940L-xx-TN3-R LM2940-xx-TN3-T LM2940L-xx-TN3-T LM2940-xx-TQ2-R LM2940L-xx-TQ2-R LM2940-xx-TQ2-T LM2940L-xx-TQ2-T LM2940-xx-TQ3-R LM2940L-xx-TQ3-R LM2940-xx-TQ3-T LM2940L-xx-TQ3-T Note: 1.xx: output voltage, refer to Marking Information. 2.Pin Assignment: I: VIN G: GND O:VOUT LM2940L-xx-AA3-R (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Lead Plating Package SOT-223 TO-220 TO-252 TO-252 TO-263 TO-263 TO-263-3 TO-263-3 Pin Assignment 1 2 3 I G O I G O I G O I G O I G O I G O I G O I G O Packing Tape Reel Tube Tape Reel Tube Tape Reel Tube Tape Reel Tube (1) R: Tape Reel, T: Tube (2) AA3: SOT-223, TA3: TO-220, TN3: TO-252, TQ 2: TO-263, TQ3: TO-263-3 (3) xx: refer to Marking Information (4) L: Lead Free Plating, Blank: Pb/Sn www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd 1 of 11 QW-R102-016.E LM2940 MARKING INFORMATION PACKAGE VOLTAGE CODE LINEAR INTEGRATED CIRCUIT MARKING LM2940 SOT-223 10 12 15 50 80 90 :10V :12V :15V : 5V : 8V : 9V VOLTAGE CODE LEAD PLATING DATE CODE 1 2 3 TO-220 TO-252 TO-263 TO-263-3 U TC LM2940 VOLTAGECODE LEAD PLATING DATE CODE 1 2 3 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 11 QW-R102-016.E LM2940 ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage Power Dissipation Junction Temperature LINEAR INTEGRATED CIRCUIT RATINGS UNIT 26 V Internally limited +150 °C TO-220/TO-263-3/TO-263 -40 ~ +125 °C Operating Temperature TOPR °C SOT-223 -40 ~ +85 Storage temperature TSTG -65 ~ +150 °C Note Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. SYMBOL VIN PD TJ ELECTRICAL CHARACTERISTICS (Ta=TJ =25°C, VIN=VOUT+5V, IOUT=1A and COUT=22µF, unless otherwise specified.) For LM2940-5.0V PARAMETER Output Voltage Line Regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT=1A IOUT=100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω Ro=100Ω, T ≤ 100ms SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR TEST CONDITIONS 6.25V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA 50mA ≤ IOUT ≤ 1A 100 mA DC and 20mArms, fo=120Hz VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA 10Hz-100kHz, IOUT=5mA fo=120Hz, 1Vrms, IOUT=100mA MIN 4.85 TYP 5.00 20 35 35 10 150 72 20 0.5 0.11 1.9 75 -30 -75 0.8 0.15 MAX 5.15 50 50 15 UNIT V mV mV mΩ mA µVrms dB mV/ 1000Hr V A V V V 60 1.6 60 -15 -50 For LM2940-8.0V PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω Ro=100Ω, T ≤ 100ms SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR TEST CONDITIONS 9.4V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A VOUT +2V ≤ VIN ≤ 26V, IOUT=5mA 50mA ≤ IOUT ≤1A 100 mA DC and 20mArms, fo=120Hz VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA MIN 7.76 TYP 8.00 20 55 55 10 240 66 32 0.5 0.11 1.9 75 -30 -75 0.8 0.15 MAX 8.24 80 80 15 UNIT V mV mV mΩ mA µVrms dB mV/ 1000Hr V A V V V 54 1.6 60 -15 -50 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 11 QW-R102-016.E LM2940 ELECTRICAL CHARACTERISTICS(Cont.) For LM2940-9.0V PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω Ro=100Ω, T ≤ 100ms SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR LINEAR INTEGRATED CIRCUIT TEST CONDITIONS 10.5V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA 50mA ≤ IOUT ≤ 1A 100 mA DC and 20mArms, fo=120Hz VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA MIN 8.73 52 TYP 9.00 20 60 60 10 270 64 34 0.5 0.11 1.9 75 -30 -75 MAX 9.27 90 90 15 UNIT V mV mV mΩ mA µVrms dB mV/ 1000Hr V A V V V 0.8 0.15 1.6 60 -15 -50 For LM2940-10V PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω Ro=100Ω, T ≤ 100ms SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR TEST CONDITIONS 11.5V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA 50mA ≤ IOUT ≤ 1A 100 mA DC and 20mArms, fo=120Hz VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA MIN 9.70 TYP MAX UNIT 10.00 10.30 V 20 100 mV 65 100 mV 65 mΩ 10 15 mA 300 µVrms 63 dB mV/ 36 1000Hr 0.5 0.8 V 0.11 0.15 1.9 A 75 V -30 V -75 V 51 1.6 60 -15 -50 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 11 QW-R102-016.E LM2940 ELECTRICAL CHARACTERISTICS(Cont.) UTC LM2940-12V PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω Ro=100Ω, T≤100ms SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR LINEAR INTEGRATED CIRCUIT TEST CONDITIONS 13.6V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA 50mA ≤ IOUT ≤ 1A 100 mADC and 20mArms, fo=120Hz VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA MIN TYP MAX UNIT 11.64 12.00 12.36 V 20 120 mV 55 120 mV 80 mΩ 10 15 mA 360 µVrms 54 66 dB mV/ 48 1000Hr 0.5 0.8 V 0.11 0.15 1.6 1.9 A 60 75 V -15 -30 V -50 -75 V UTC LM2940-15V PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage VD IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR TEST CONDITIONS 16.75V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA 50mA ≤ IOUT ≤ 1A 100 mADC and 20mArms, fo=120Hz VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA MIN TYP MAX UNIT 14.55 15.00 15.45 V 20 150 mV 70 150 mV 100 mΩ 10 15 mA 450 µVrms 52 64 dB mV/ 60 1000Hr 0.5 0.8 V 0.11 0.15 1.6 1.9 A 60 75 V -15 -30 V V -50 -75 Short Circuit Current ISC Maximum Line Transient TIN Reverse Polarity DC Input Voltage VRIN Reverse Polarity Transient Input Ro=100Ω, T ≤ 100ms VTRRI Voltage Note: Output current will decrease with temperature increase but will not drop below 1A at the maximum specified temperature. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 11 QW-R102-016.E LM2940 TYPICAL APPLICATION LINEAR INTEGRATED CIRCUIT VIN LM2940-XX + VOUT C1 0.47 μF IQ COUT 22μ F Note: 1.C1 is required if regulator is located far from power supply filter. 2.COUT must be higher than 22µF for stability, and locate as close as possible to the regulator. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 11 QW-R102-016.E LM2940 TYPICAL CHARACTERISTICS Dropout Voltage vs. Output Current 0.9 0.8 TJ=25℃ 1.0 0.9 0.8 LINEAR INTEGRATED CIRCUIT Dropout Voltage vs.Temperature Input-Output Differential (V) Dropout Voltage (V) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 200 400 600 800 Output Current (mA) 1000 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -40 0 100mA 40 120 80 Temperature (℃) 160 500mA 1A Output Voltage vs. Temperature 5.10 5.08 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 -40 0 80 120 40 Temperature ( ℃) 160 0 -40 5.06 50 40 30 Quiescent Current vs. Temperature VIN=VOUT+5V Quiescent Current (mA) Output Voltage (V) 1A 20 10 500mA 10mA 0 40 120 80 Temperature (℃) 160 200 180 160 140 120 100 80 60 40 20 0 0 Quiescent Current vs. Input Voltage 50 40 Quiescent Current vs. Load Current VIN=14V VOUT=5V TJ=25℃ Quiescent Current (mA) Quiescent Current (mA) 35 30 20 10 0 100mA 1A 500mA 5 25 10 15 20 Input Voltage (V) 30 0 0.2 0.4 0.6 Load Current (A) 0.8 1.0 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 11 QW-R102-016.E LM2940 TYPICAL CHARACTERISTICS (Cont.) Line Transient Response Output Voltage Deviation (V) LINEAR INTEGRATED CIRCUIT Output Voltage Deviation(mV) 30 20 10 0 -10 -20 -30 Input Voltage Change(V) Load Current (A) 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 1.0 0.5 Load Transient Response V IN=10V VoUT=5 V COUT=22μF TJ=25℃ 3V 0V - 10 0 10 30 40 20 Time ( μS) 50 60 0 -10 0 10 20 Time ( μS) Low Voltage Behavior 30 40 Ripple Rejection vs. Frequency 95 85 Ripple Rejection (dB) 65 55 45 35 1 10 1K 10K 100K 1M 100 Frequency (Hz) Low Voltage Behavior IoUT=1A VoUT=8 V TJ=25℃ Output Voltage (V) 75 VIN=10V VoUT=5 V COUT=22μF IoUT=10mA 5.0 IoUT=1A VoUT=5 V TJ=25℃ 4.0 3.0 2.0 1.0 1.0 2.0 4.0 5.0 3.0 Input Voltage (V) 6.0 14 12 Output Voltage (V) 18 Low Voltage Behavior IoUT=1A VoUT=9 V 15 TJ=25℃ Output Voltage (V) 10 8 6 4 2 0 0 2 4 6 8 10 Input Voltage (V) 12 14 12 9 6 3 0 0 3 6 9 12 Input Voltage (V) 15 18 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 11 QW-R102-016.E LM2940 TYPICAL CHARACTERISTICS (Cont.) Low Voltage Behavior LINEAR INTEGRATED CIRCUIT 18 IOUT=1A VOUT=10 V 15 TJ=25℃ 12 9 6 3 0 14 Low Voltage Behavior Output Voltage (V) 0 3 6 9 12 Input Voltage (V) Low Voltage Behavior 15 Output Voltage (V) IOUT=1A 12 VOUT=12 V TJ=25℃ 10 8 6 4 2 18 0 0 2 4 8 6 10 Input Voltage (V) 12 14 18 IOUT=1A VOUT=15 V 15 TJ=25℃ 12 10 Output at Voltage Extremes RO=100Ω VOUT=5V Output Voltage (V) 12 9 6 3 0 Output Voltage (V) 0 3 9 6 12 Input Voltage (V) 15 18 8 6 4 2 0 -2 -30 10 -20 -10 0 20 Input Voltage (V) 30 40 20 16 Output at Voltage Extremes RO=100Ω VoUT=8V 20 16 Output at Voltage Extremes RO =100Ω VoUT=9V Output Voltage (V) 12 8 4 0 -4 -30 Output Voltage (V) -20 -10 0 10 20 Input Voltage (V) 12 8 4 0 -4 -30 30 40 -20 -10 10 20 0 Input Voltage (V) 30 40 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 11 QW-R102-016.E LM2940 TYPICAL CHARACTERISTICS (Cont.) Output at Voltage Extremes 25 20 Output Voltage (V) 15 10 5 0 -5 -30 RO=100Ω VOUT=10V Output Voltage (V) LINEAR INTEGRATED CIRCUIT Output at Voltage Extremes 20 16 12 8 4 0 -4 -30 RO=100Ω VOUT=12V 10 20 -20 -10 0 Input Voltage (V) 30 40 -20 -10 0 10 20 Input Voltage (V) Output Capacitor ESR 30 40 25 20 Output Voltage (V) 15 10 5 0 Output at Voltage Extremes RO=100Ω VOUT=15V 100 Equivalent Series Resistance ( Ω) COUT=22μF VOUT=5V 10 1 STABLE REGION 0.1 -5 10 0 -30 -20 -10 20 Input Voltage (V) 3.0 Peak Output Current 0.01 30 40 0 200 600 400 800 Output Current (mA) Output Impedance 10.00 VIN=10V 5.00 VOUT=5 V COUT=22μF 2.00 IoUT=50mA 1000 VIN=14V 2.0 Output Impedance (Ω) 0 Output Current (A) 1.00 0.50 0.20 0.10 0.05 0.02 1.0 0 -40 40 80 120 160 0.01 1 10 100 1K 10K 100K 1M Temperature ( ℃) Frequency (Hz) 10 of 11 QW-R102-016.E UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LM2940 TYPICAL CHARACTERISTICS (Cont.) Maximum Power Dissipation (TO-220) 22 20 18 Power Dissipation (W) LINEAR INTEGRATED CIRCUIT Maximum Power Dissipation (TO-263-3) Infinite Heatsink Power Dissipation (W) Infinite Heatsink 4 3 2 1 θJA =32℃/W θJA = 37℃/W θJA = 50℃/W θJA =73℃/W 16 14 12 10 8 6 4 10℃/W Heatsink 2 0 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperatire (℃) NO Heatsink NO Heatsink 0 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperatire (℃) U TC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 11 of 11 QW-R102-016.E