UNISONIC TECHNOLOGIES CO., LTD LM2940 LINEAR INTEGRATED CIRCUIT 1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR 1 1 TO-263 TO-263-3 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). FEATURES 1 TO-220 1 1 TO-252 SOT-223 *Pb-free plating product number: LM2940L * 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 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 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)Packing Type (1) R: Tape Reel, T: Tube (2)Package Type (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 (3)Output Voltage Code (4)Lead Plating www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd 1 of 11 QW-R102-016.E LM2940 LINEAR INTEGRATED CIRCUIT MARKING INFORMATION PACKAGE VOLTAGE CODE MARKING LM2940 SOT-223 TO-220 TO-252 TO-263 TO-263-3 10 12 15 50 80 90 VOLTAGE CODE :10V :12V :15V : 5V : 8V : 9V DATE CODE 1 2 3 UTC LM2940 LEAD PLATING VOLTAGECODE DATE CODE 1 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LEAD PLATING 2 3 2 of 11 QW-R102-016.E LM2940 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL VIN PD TJ 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. Input Voltage Power Dissipation Junction Temperature 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 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 60 Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage TYP 5.00 20 35 35 10 150 72 MAX 5.15 50 50 15 20 ISC TIN VRIN IOUT=1A IOUT=100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω 1.6 60 -15 0.5 0.11 1.9 75 -30 VTRRI Ro=100Ω, T ≤ 100ms -50 -75 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 VD 0.8 0.15 UNIT V mV mV mΩ mA µVrms dB mV/ 1000Hr V A V V V For LM2940-8.0V PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR 54 Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage 15 32 ISC TIN VRIN IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω 1.6 60 -15 0.5 0.11 1.9 75 -30 VTRRI Ro=100Ω, T ≤ 100ms -50 -75 VD UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MAX 8.24 80 80 0.8 0.15 UNIT V mV mV mΩ mA µVrms dB mV/ 1000Hr V A V V V 3 of 11 QW-R102-016.E LM2940 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) For LM2940-9.0V PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR 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 Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage TYP 9.00 20 60 60 10 270 64 MAX 9.27 90 90 15 34 ISC TIN VRIN IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω 1.6 60 -15 0.5 0.11 1.9 75 -30 VTRRI Ro=100Ω, T ≤ 100ms -50 -75 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 VD 0.8 0.15 UNIT V mV mV mΩ mA µVrms dB mV/ 1000Hr V A V V V For LM2940-10V PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR 51 Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage ISC TIN VRIN IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω 1.6 60 -15 VTRRI Ro=100Ω, T ≤ 100ms -50 VD UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 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 4 of 11 QW-R102-016.E LM2940 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) UTC LM2940-12V PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection SYMBOL VOUT △VOUT △VOUT Ro IQ eN RR 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 Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage ISC TIN VRIN IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω VTRRI Ro=100Ω, T≤100ms VD 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 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 Long Term Stability Dropout Voltage VD IOUT =1A IOUT =100mA (Note) Ro=100Ω, T ≤ 100ms Ro=100Ω 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 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION VIN LM2940-XX C1 0.47μF VOUT + IQ COUT 22μF 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 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS Dropout Voltage vs. Output Current 0.9 TJ=25℃ 0.9 0.8 0.7 Dropout Voltage (V) Input-Output Differential (V) 0.8 0.6 0.5 0.4 0.3 0.7 0.5 0.4 0.1 0.1 200 400 600 800 Output Current (mA) 500mA 0.3 0.2 0 1A 0.6 0.2 0 Dropout Voltage vs.Temperature 1.0 100mA 0 -40 1000 50 160 VIN=VOUT+5V 5.08 Quiescent Current (mA) 5.06 5.04 5.02 5.00 4.98 4.96 4.94 40 30 1A 20 500mA 10 10mA 4.92 4.90 -40 0 80 120 40 Temperature (℃) 0 -40 160 Quiescent Current vs. Input Voltage 200 Quiescent Current (mA) 140 120 100 80 100mA 60 40 1A 500mA 40 120 80 Temperature (℃) 160 VIN=14V VOUT=5V TJ=25℃ 40 160 0 Quiescent Current vs. Load Current 50 180 Quiescent Current (mA) 40 120 80 Temperature (℃) Quiescent Current vs. Temperature Output Voltage vs. Temperature 5.10 Output Voltage (V) 0 30 20 10 20 0 0 5 25 10 15 20 Input Voltage (V) 30 35 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 0 0 0.2 0.4 0.6 Load Current (A) 0.8 1.0 7 of 11 QW-R102-016.E LM2940 LINEAR INTEGRATED CIRCUIT Line Transient Response Output Voltage Deviation (V) 30 20 10 0 -10 -20 -30 Load Current (A) Input Voltage Change(V) Output Voltage Deviation(mV) TYPICAL CHARACTERISTICS (Cont.) 3V 0V -10 0 10 30 40 20 Time (μS) 50 Load Transient Response 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 V IN=10V VoUT=5 V COUT=22μF TJ=25℃ 1.0 0.5 0 -10 60 Ripple Rejection vs. Frequency VIN=10V VoUT=5 V COUT=22μF IoUT=10mA Ripple Rejection (dB) 85 75 65 55 30 40 4.0 5.0 3.0 Input Voltage (V) 6.0 Low Voltage Behavior 5.0 Output Voltage (V) 95 10 20 Time (μS) 0 IoUT=1A VoUT=5 V TJ=25℃ 4.0 3.0 2.0 45 35 1 2.0 Low Voltage Behavior 18 IoUT=1A VoUT=9 V 15 TJ=25℃ IoUT=1A VoUT=8 V TJ=25℃ 12 Output Voltage (V) 10 8 6 4 12 9 6 3 2 0 1.0 1.0 1K 10K 100K 1M 100 Frequency (Hz) Low Voltage Behavior 14 Output Voltage (V) 10 0 0 2 4 6 8 10 Input Voltage (V) 12 14 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 0 3 6 9 12 Input Voltage (V) 15 18 8 of 11 QW-R102-016.E LM2940 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS (Cont.) Low Voltage Behavior 18 Output Voltage (V) Output Voltage (V) IOUT=1A V OUT=10 V 15 TJ=25℃ 12 9 6 3 0 0 3 6 9 12 Input Voltage (V) 15 Low Voltage Behavior 4 10 Output Voltage (V) Output Voltage (V) 6 12 12 9 6 3 0 2 4 8 6 10 Input Voltage (V) 12 14 Output at Voltage Extremes RO=100Ω VOUT=5V 8 6 4 2 0 3 0 9 6 12 Input Voltage (V) 15 -2 -30 18 Output at Voltage Extremes 20 RO=100Ω VoUT=8V 16 16 Output Voltage (V) Output Voltage (V) 8 0 18 IOUT=1A V 15 OUT=15 V TJ=25℃ 20 IOUT=1A 12 VOUT=12 V TJ=25℃ 10 2 18 0 Low Voltage Behavior 14 12 8 4 0 -4 -30 10 -20 -10 0 20 Input Voltage (V) 30 40 Output at Voltage Extremes RO =100Ω VoUT=9V 12 8 4 0 -20 -10 0 10 20 Input Voltage (V) 30 40 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw -4 -30 -20 -10 10 20 0 Input Voltage (V) 30 40 9 of 11 QW-R102-016.E LM2940 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS (Cont.) Output at Voltage Extremes Output Voltage (V) 20 Output at Voltage Extremes 20 RO=100Ω VOUT=10V 15 10 5 12 8 4 0 0 -5 -30 Output Voltage (V) 20 10 20 -20 -10 0 Input Voltage (V) 30 -4 -30 40 100 RO=100Ω VOUT=15V 15 10 5 30 40 COUT=22μF VOUT=5V 10 1 STABLE REGION 0.1 0 0.01 -5 10 0 -30 -20 -10 20 Input Voltage (V) 30 40 0 200 600 400 800 Output Current (mA) Peak Output Current 3.0 1000 Output Impedance 10.00 Output Impedance (Ω) VIN=14V Output Current (A) -20 -10 0 10 20 Input Voltage (V) Output Capacitor ESR Output at Voltage Extremes Equivalent Series Resistance ( Ω) 25 RO=100Ω VOUT=12V 16 Output Voltage (V) 25 2.0 1.0 VIN=10V 5.00 VOUT=5 V COUT=22μF 2.00 IoUT=50mA 1.00 0.50 0.20 0.10 0.05 0.02 0 -40 0 40 80 120 160 Temperature ( ℃) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 0.01 1 10 100 1K 10K 100K 1M Frequency (Hz) 10 of 11 QW-R102-016.E LM2940 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS (Cont.) Maximum Power Dissipation (TO-220) 20 Power Dissipation (W) 18 16 14 12 10 8 6 4 Infinite Heatsink Infinite Heatsink 10℃/W Heatsink NO Heatsink Power Dissipation (W) 22 Maximum Power Dissipation (TO-263-3) 4 3 2 1 θJA =32℃/W θJA =37℃/W θJA =50℃/W θJA =73℃/W NO Heatsink 2 0 0 10 20 30 40 50 60 70 80 90 100 0 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperatire (℃) Ambient Temperatire (℃) UTC 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