Order this document by LM340/D This family of fixed voltage regulators are monolithic integrated circuits capable of driving loads in excess of 1.0 A. These three–terminal regulators employ internal current limiting, thermal shutdown, and safe–area compensation. Devices are available with improved specifications, including a 2% output voltage tolerance, on A–suffix 5.0, 12 and 15 V device types. Although designed primarily as a fixed voltage regulator, these devices can be used with external components to obtain adjustable voltages and currents. This series of devices can be used with a series–pass transistor to boost output current capability at the nominal output voltage. • Output Current in Excess of 1.0 A • • • • • THREE–TERMINAL POSITIVE FIXED VOLTAGE REGULATORS SEMICONDUCTOR TECHNICAL DATA T SUFFIX PLASTIC PACKAGE CASE 221A No External Components Required Output Voltage Offered in 2% and 4% Tolerance* Internal Thermal Overload Protection Internal Short Circuit Current Limiting Output Transistor Safe–Area Compensation Pin 1. Input 2. Ground 3. Output 1 2 3 Heatsink surface is connected to Pin 2. Simplified Application Input ORDERING INFORMATION Device Output Voltage and Tolerance LM340T–5.0 5.0 V ± 4% LM340AT–5.0 5.0 V ± 2% LM340T–6.0 6.0 V ± 4% LM340T–8.0 8.0 V ± 4% LM340T–12 12 V ± 4% LM340AT–12 12 V ± 2% LM340T–15 15 V ± 4% LM340AT–15 15 V ± 2% LM340T–18 18 V ± 4% LM340T–24 24 V ± 4% Operating Temperature Range Cin* 0.33µF LM340–XX Output CO** Package A common ground is required between the input and the output voltages. The input voltage must remain typically 1.7 V above the output voltage even during the low point on the input ripple voltage. TJ = 0° 0 to +125°C 12 C Pl i Power Plastic P XX these two digits of the type number indicate voltage. * Cin is required if regulator is located an appreciable distance from power supply filter. ** CO is not needed for stability; however, it does improve transient response. If needed, use a 0.1 µF ceramic disc. * 2% regulators are available in 5, 12 and 15 V devices. Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA Rev 1 1 LM340, A Series MAXIMUM RATINGS (TA = +25°C unless otherwise noted.) Rating Symbol Value Unit Vin 35 40 Vdc Power Dissipation and Thermal Characteristics Plastic Package TA = +25°C Derate above TA = +25°C Thermal Resistance, Junction–to–Air PD 1/θJA θJA Internally Limited 15.4 65 W mW/°C °C/W TC= +25°C Derate above TC = +75°C (See Figure 1) Thermal Resistance, Junction–to–Case PD 1/θJA θJC Internally Limited 200 5.0 W mW/°C °C/W Tstg –65 to +150 °C TJ 0 to +150 °C Input Voltage (5.0 V – 18 V) Input Voltage (24 V) Storage Temperature Range Operating Junction Temperature Range Representative Schematic Diagram 1.0k Input 1.0k 210 6.7V 16k 100 1.0k 300 200 3.0k 3.6k 10pF 5.6k 6.4k 300 13 50 520 0.12 200 Output 40 pF 2.6k 6.0k 2.0k 3.9k 6.0k 2 2.8k Gnd MOTOROLA ANALOG IC DEVICE DATA LM340, A Series LM340–5.0 ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 4.8 5.0 5.2 Vdc – – – – – – – – 50 50 25 50 – – – – – – 50 50 25 4.75 – 5.25 – – – 4.0 8.5 8.0 – – – – – – 1.0 0.5 1.0 Line Regulation (Note 2) 8.0 Vdc to 20 Vdc 7.0 Vdc to 25 Vdc (TJ = +25°C) 8.0 Vdc to 12 Vdc, IO = 1.0 A 7.3 Vdc to 20 Vdc, IO = 1.0 A (TJ = +25°C) Regline Load Regulation (Note 2) 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload Output Voltage 7.0 ≤ Vin ≤ 20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO Quiescent Current IO = 1.0 A TJ = +25°C IB mV mV Vdc mA Quiescent Current Change 7.0 ≤ Vin ≤ 25 Vdc, IO = 500 mA 5.0 mA ≤ IO ≤ 1.0 A, Vin = 10 V 7.5 ≤ Vin ≤ 20 Vdc, IO = 1.0 A ∆IB Ripple Rejection IO = 1.0 A (TJ = +25°C) RR 62 80 – dB Dropout Voltage mA VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 2.0 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 40 – µV TCVO – ±0.6 – mV/°C IO – 2.4 – A 7.3 – – Vdc Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) IO = 1.0 A NOTES: 1. Tlow to Thigh = 0° to +125°C 2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. DEFINITIONS Line Regulation – The change in output voltage for a change in the input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average chip temperature is not significantly affected. Load Regulation – The change in output voltage for a change in load current at constant chip temperature. MOTOROLA ANALOG IC DEVICE DATA Maximum Power Dissipation – The maximum total device dissipation for which the regulator will operate within specifications. Quiescent Current – That part of the input current that is not delivered to the load. Output Noise Voltage – The rms AC voltage at the output, with constant load and no input ripple, measured over a specified frequency range. 3 LM340, A Series LM340A–5.0 ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 4.9 5.0 5.1 Vdc – – – – – 3.0 – – 10 10 12 4.0 – – – – – – 25 25 15 Line Regulation 7.5 Vdc to 20 Vdc, IO = 500 mA 7.3 Vdc to 25 Vdc (TJ = +25°C) 8.0 Vdc to 12 Vdc 8.0 Vdc to 12 Vdc (TJ = +25°C) Regline Load Regulation 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload mV mV Output Voltage 7.5 ≤ Vin ≤ 20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO 4.8 – 5.2 Vdc Quiescent Current TJ = +25°C IB – – – 3.5 6.5 6.0 mA – – – – – – 0.5 0.8 0.8 Quiescent Current Change 5.0 mA ≤ IO ≤ 1.0 A, Vin = 10 V 8.0 ≤ Vin ≤ 25 Vdc, IO = 500 mA 7.5 ≤ Vin ≤ 20 Vdc, IO = 1.0 A (TJ = +25°C) ∆IB Ripple Rejection 8.0 ≤ Vin ≤ 18 Vdc, f = 120 Hz IO = 500 mA IO = 1.0 A (TJ = +25°C) RR mA dB 68 68 – 80 – – VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 2.0 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 40 – µV TCVO – ±0.6 – mV/°C IO – 2.4 – A 7.3 – – Vdc Dropout Voltage Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) IO = 1.0 A NOTE: 1. Tlow to Thigh = 0° to +125°C 4 MOTOROLA ANALOG IC DEVICE DATA LM340, A Series LM340–6.0 ELECTRICAL CHARACTERISTICS (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 5.75 6.0 6.25 Vdc – – – – – – – – 60 60 30 60 – – – – – – 60 60 30 5.7 – 6.3 – – – 4.0 8.5 8.0 – – – – – – 1.0 0.5 1.0 Line Regulation 9.0 Vdc to 21 Vdc 8.0 Vdc to 25 Vdc (TJ = +25°C) 9.0 Vdc to 13 Vdc, IO = 1.0 A 8.3 Vdc to 21 Vdc, IO = 1.0 A (TJ = +25°C) Regline Load Regulation 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload Output Voltage 8.0 ≤ Vin ≤ 21 Vdc, 6.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO Quiescent Current IO = 1.0 A TJ = +25°C IB mV mV Vdc mA Quiescent Current Change 8.0 ≤ Vin ≤ 25 Vdc, IO = 500 mA 5.0 mA ≤ IO ≤ 1.0 A, Vin = 11 V 8.6 ≤ Vin ≤ 21 Vdc, IO = 1.0 A ∆IB Ripple Rejection IO = 1.0 A (TJ = +25°C) RR 59 78 – dB Dropout Voltage mA VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 1.9 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 45 – µV TCVO – ±0.7 – mV/°C IO – 2.4 – A 8.3 – – Vdc Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) IO = 1.0 A NOTE: 1. Tlow to Thigh = 0° to +125°C MOTOROLA ANALOG IC DEVICE DATA 5 LM340, A Series LM340–8.0 ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 7.7 8.0 8.3 Vdc – – – – – – – – 80 80 40 80 – – – – – – 80 80 40 7.6 – 8.4 – – – 4.0 8.5 8.0 – – – – – – 1.0 0.5 1.0 Line Regulation 11 Vdc to 23 Vdc 10.5 Vdc to 25 Vdc (TJ = +25°C) 11 Vdc to 17 Vdc, IO = 1.0 A 10.5 Vdc to 23 Vdc, IO = 1.0 A (TJ = +25°C) Regline Load Regulation 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload Output Voltage 10.5 ≤ Vin ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO Quiescent Current IO = 1.0 A TJ = +25°C IB mV mV Vdc mA Quiescent Current Change 10.5 ≤ Vin ≤ 25 Vdc, IO = 500 mA 5.0 mA ≤ IO ≤ 1.0 A, Vin = 14 V 10.6 ≤ Vin ≤ 23 Vdc, IO = 1.0 A ∆IB Ripple Rejection IO = 1.0 A (TJ = +25°C) RR 56 76 – dB Dropout Voltage mA VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 1.5 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 52 – µV TCVO – ±1.0 – mV/°C IO – 2.4 – A 10.5 – – Vdc Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) IO = 1.0 A NOTE: 1. Tlow to Thigh = 0° to +125°C 6 MOTOROLA ANALOG IC DEVICE DATA LM340, A Series LM340–12 ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 11.5 12 12.5 Vdc – – – – – – – – 120 120 60 120 – – – – – – 120 120 60 11.4 – 12.6 – – – 4.0 8.5 8.0 – – – – – – 1.0 0.5 1.0 Line Regulation (Note 2) 15 Vdc to 27 Vdc 14.6 Vdc to 30 Vdc (TJ = +25°C) 16 Vdc to 22 Vdc, IO = 1.0 A 14.6 Vdc to 27 Vdc, IO = 1.0 A (TJ = +25°C) Regline Load Regulation (Note 2) 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload Output Voltage 14.5 ≤ Vin ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO Quiescent Current IO = 1.0 A TJ = +25°C IB mV mV Vdc mA Quiescent Current Change 14.5 ≤ Vin ≤ 30 Vdc, IO = 500 mA 5.0 mA ≤ IO ≤ 1.0 A, Vin = 19 V 14.8 ≤ Vin ≤ 27 Vdc, IO = 1.0 A ∆IB Ripple Rejection IO = 1.0 A (TJ = +25°C) RR 55 72 – dB Dropout Voltage mA VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 1.1 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 75 – µV TCVO – ±1.5 – mV/°C IO – 2.4 – A 14.6 – – Vdc Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) IO = 1.0 A NOTES: 1. Tlow to Thigh = 0° to +125°C 2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. MOTOROLA ANALOG IC DEVICE DATA 7 LM340, A Series LM340A–12 ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 1.0 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 11.75 12 12.25 Vdc – – – – – 4.0 – – 18 18 30 9.0 – – – – – – 60 32 19 Line Regulation 14.8 Vdc to 27 Vdc, IO = 500 mA 14.5 Vdc to 30 Vdc (TJ = +25°C) 16 Vdc to 22 Vdc 16 Vdc to 22 Vdc (TJ = +25°C) Regline Load Regulation 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload mV mV Output Voltage 14.8 ≤ Vin ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO 11.5 – 12.5 Vdc Quiescent Current TJ = +25°C IB – – – 3.5 6.5 6.0 mA – – – – – – 0.5 0.8 0.8 Quiescent Current Change 5.0 mA ≤ IO ≤ 1.0 A, Vin = 19 V 15 ≤ Vin ≤ 30 Vdc, IO = 500 mA 14.8 ≤ Vin ≤ 27 Vdc, IO = 1.0 A(TJ = +25°C) ∆IB Ripple Rejection 15 ≤ Vin ≤ 25 Vdc, f = 120 Hz IO = 500 mA IO = 1.0 A (TJ = +25°C) RR mA dB 61 61 – 72 – – VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 1.1 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 75 – µV TCVO – ±1.5 – mV/°C IO – 2.4 – A 14.5 – – Vdc Dropout Voltage Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) NOTE: 1. Tlow to Thigh = 0° to +125°C 8 MOTOROLA ANALOG IC DEVICE DATA LM340, A Series LM340–15 ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 14.4 15 15.6 Vdc – – – – – – – – 150 150 75 150 – – – – – – 150 150 75 14.25 – 15.75 – – – 4.0 8.5 8.0 – – – – – – 1.0 0.5 1.0 Line Regulation (Note 2) 18.5 Vdc to 30 Vdc 17.5 Vdc to 30 Vdc (TJ = +25°C) 20 Vdc to 26 Vdc, IO = 1.0 A 17.7 Vdc to 30 Vdc, IO = 1.0 A (TJ = +25°C) Regline Load Regulation (Note 2) 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload Output Voltage 17.5 ≤ Vin ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO Quiescent Current IO = 1.0 A TJ = +25°C IB mV mV Vdc mA Quiescent Current Change 17.5 ≤ Vin ≤ 30 Vdc, IO = 500 mA 5.0 mA ≤ IO ≤ 1.0 A, Vin = 23 V 17.9 ≤ Vin ≤ 30 Vdc, IO = 1.0 A ∆IB Ripple Rejection IO = 1.0 mA (TJ = +25°C) RR 54 70 – dB VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 800 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 90 – µV TCVO – ±1.8 – mV/°C IO – 2.4 – A 17.7 – – Vdc Dropout Voltage Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) IO = 1.0 A mA NOTES: 1. Tlow to Thigh = 0° to +125°C 2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. MOTOROLA ANALOG IC DEVICE DATA 9 LM340, A Series LM340A–15 ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 1.0 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 14.7 15 15.3 Vdc – – – – – 4.0 – – 22 22 30 10 – – – – 12 – 75 35 21 Line Regulation 17.9 Vdc to 30 Vdc, IO = 500 mA 17.5 Vdc to 30 Vdc (TJ = +25°C) 20 Vdc to 26 Vdc, IO = 1.0 A 20 Vdc to 26 Vdc, IO = 1.0 A (TJ = +25°C) Regline Load Regulation 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload mV mV Output Voltage 17.9 ≤ Vin ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO 14.4 – 15.6 Vdc Quiescent Current TJ = +25°C IB – – – 3.5 6.5 6.0 mA – – – – – – 0.5 0.8 0.8 Quiescent Current Change 5.0 mA ≤ IO ≤ 1.0 A, Vin = 23 V 17.9 ≤ Vin ≤ 30 Vdc, IO = 500 mA 17.9 ≤ Vin ≤ 30 Vdc, IO = 1.0 A (TJ = +25°C) ∆IB Ripple Rejection 18.5 ≤ Vin ≤ 28.5 Vdc, f = 120 Hz IO = 500 mA IO = 1.0 A (TJ = +25°C) RR mA dB 60 60 – 70 – – VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 800 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 90 – µV TCVO – ±1.8 – mV/°C IO – 2.4 – A 17.5 – – Vdc Dropout Voltage Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) NOTE: 1. Tlow to Thigh = 0° to +125°C 10 MOTOROLA ANALOG IC DEVICE DATA LM340, A Series LM340–18 ELECTRICAL CHARACTERISTICS (Vin = 27 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 17.3 18 18.7 Vdc – – – – – – – – 180 180 90 180 – – – – – – 180 180 90 17.1 – 18.9 – – – 4.0 8.5 8.0 – – – – – – 1.0 0.5 1.0 Line Regulation 21.5 Vdc to 33 Vdc 21 Vdc to 33 Vdc (TJ = +25°C) 24 Vdc to 30 Vdc, IO = 1.0 A 21 Vdc to 33 Vdc, IO = 1.0 A (TJ = +25°C) Regline Load Regulation 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload Output Voltage 21 ≤ Vin ≤ 33 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO Quiescent Current IO = 1.0 A TJ = +25°C IB mV mV Vdc mA Quiescent Current Change 21 ≤ Vin ≤ 33 Vdc, IO = 500 mA 5.0 mA ≤ IO ≤ 1.0 A, Vin = 27 V 21 ≤ Vin ≤ 33 Vdc, IO = 1.0 A ∆IB Ripple Rejection IO = 1.0 mA (TJ = +25°C) RR 53 69 – dB Dropout Voltage mA VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 500 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 110 – µV TCVO – ±2.3 – mV/°C IO – 2.4 – A 21 – – Vdc Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) IO = 1.0 A NOTE: 1. Tlow to Thigh = 0° to +125°C MOTOROLA ANALOG IC DEVICE DATA 11 LM340, A Series LM340–24 ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) Characteristics Output Voltage (TJ = +25°C) IO = 5.0 mA to 1.0 A Symbol Min Typ Max Unit VO 23 24 25 Vdc – – – – – – – – 240 240 120 240 – – – – – – 240 240 120 22.8 – 25.2 – – – 4.0 8.5 8.0 – – – – – – 1.0 0.5 1.0 Line Regulation 28 Vdc to 38 Vdc 27 Vdc to 38 Vdc (TJ = +25°C) 30 Vdc to 36 Vdc, IO = 1.0 A 27.1 Vdc to 38 Vdc, IO = 1.0 A (TJ = +25°C) Regline Load Regulation 5.0 mA ≤ IO ≤ 1.0 A 5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C) Regload Output Voltage 27 ≤ Vin ≤ 38 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO Quiescent Current IO = 1.0 A TJ = +25°C IB mV mV Vdc mA Quiescent Current Change 27 ≤ Vin ≤ 38 Vdc, IO = 500 mA 5.0 mA ≤ IO ≤ 1.0 A, Vin = 33 V 27.3 ≤ Vin ≤ 38 Vdc, IO = 1.0 A ∆IB Ripple Rejection IO = 1.0 mA (TJ = +25°C) RR 50 66 – dB Dropout Voltage mA VI – VO – 1.7 – Vdc Output Resistance (f = 1.0 kHz) rO – 2.0 – mΩ Short Circuit Current Limit (TJ = +25°C) ISC – 200 – A Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn – 170 – µV TCVO – ±3.0 – mV/°C IO – 2.4 – A 27.1 – – Vdc Average Temperature Coefficient of Output Voltage IO = 5.0 mA Peak Output Current (TJ = +25°C) Input Voltage to Maintain Line Regulation (TJ = +25°C) IO = 1.0 A NOTE: 1. Tlow to Thigh = 0° to +125°C 12 MOTOROLA ANALOG IC DEVICE DATA LM340, A Series VOLTAGE REGULATOR PERFORMANCE be caused by a change in either input voltage or the load current. Thermal regulation is a function of IC layout and die attach techniques, and usually occurs within 10 ms of a change in power dissipation. After 10 ms, additional changes in the output voltage are due to the temperature coefficient of the device. Figure 1 shows the line and thermal regulation response of a typical LM340AT–5.0 to a 10 W input pulse. The variation of the output voltage due to line regulation is labeled À and the thermal regulation component is labeled Á. Figure 2 shows the load and thermal regulation response of a typical LM340AT–5.0 to a 15 W load pulse. The output voltage variation due to load regulation is labeled À and the thermal regulation component is labeled Á. The performance of a voltage regulator is specified by its immunity to changes in load, input voltage, power dissipation, and temperature. Line and load regulation are tested with a pulse of short duration (< 100 µs) and are strictly a function of electrical gain. However, pulse widths of longer duration (> 1.0 ms) are sufficient to affect temperature gradients across the die. These temperature gradients can cause a change in the output voltage, in addition to changes caused by line and load regulation. Longer pulse widths and thermal gradients make it desirable to specify thermal regulation. Thermal regulation is defined as the change in output voltage caused by a change in dissipated power for a specified time, and is expressed as a percentage output voltage change per watt. The change in dissipated power can 2 2 1 ∆ Vout , OUTPUT VOLTAGE DEVIATION (V) (2.0 mV/DIV) Figure 2. Load and Thermal Regulation 2 1 2 18 V Iout , OUTPUT CURRENT (A) ∆ Vout , OUTPUT Vin , INPUT VOLTAGE DEVIATION (V) VOLTAGE (V) (2.0 mV/DIV) Figure 1. Line and Thermal Regulation 8.0 V t, TIME (2.0 ms/DIV) LM340AT–5.0 Vout = 5.0 V 1 = Regline = 2.4 mV Vin = 8.0 V → 18 V → 8.0 V 2 = Regtherm = 0.0030% VO/W Iout = 1.0 A 2.0 0 t, TIME (2.0 ms/DIV) LM340AT–5.0 Vout = 5.0 V 1 = Regline = 4.4 mV Vin = 15 V 2 = Regtherm = 0.0020% VO/W Iout = 0 A → 1.5 A → 0 A Figure 3. Temperature Stability Figure 4. Output Impedance 100 Z O , OUTPUT IMPEDANCE ( Ω ) NORMALIZED OUTPUT VOLTAGE 1.02 Vin – Vout = 5.0 V Iout = 100 mA 1.01 1.00 0.99 0.98 –90 –50 –10 30 70 110 TJ, JUNCTION TEMPERATURE (°C) MOTOROLA ANALOG IC DEVICE DATA 150 190 10–1 10–2 Vout = 5.0 V Vin = 7.5 V Iout = 1.0 A CO = 0 TJ = 25°C 10–3 10–4 1.0 10 100 1.0 k 10 k 100 k f, FREQUENCY (Hz) 1.0 M 10 M 100 M 13 LM340, A Series Figure 5. Ripple Rejection versus Frequency Figure 6. Ripple Rejection versus Output Current 100 Iout = 50 mA RR, RIPPLE REJECTION (dB) RR, RIPPLE REJECTION (dB) 100 80 Iout = 1.5 A Vout = 5.0 V Vin = 10 V CO = 0 TJ = 25°C 60 40 80 Vout = 5.0 V Vin = 10 V Vin = 10 V CO = 0 f = 120 Hz TJ = 25°C 60 40 20 1.0 10 100 1.0 k 10 k 100 k f, FREQUENCY (Hz) 1.0 M 10 M 30 0.01 100 M Figure 7. Quiescent Current versus Input Voltage 5.0 IB , QUIESCENT CURRENT (mA) IB , QUIESCENT CURRENT (mA) 3.0 TJ = 25°C Vout = 5.0 V Iout = 1.0 A 2.0 1.0 0 0 10 20 30 Vin, INPUT VOLTAGE (Vdc) 4.0 3.0 TJ = 25°C Vin – Vout = 5.0 V 2.0 1.0 0 0.01 40 Figure 9. Dropout Voltage 2.5 2.0 IO = 1.0 A 1.5 IO = 500 mA IO = 10 mA 0.5 0 –75 3.0 2.0 1.0 0 –50 –25 0 25 50 75 TA, AMBIENT TEMPERATURE (°C) 10 4.0 ∆Vout = 100 mV 1.0 0.1 1.0 Iout, OUTPUT CURRENT (A) Figure 10. Peak Output Current Iout , OUTPUT CURRENT (A) V in –Vout , INPUT–OUTPUT VOLTAGE DIFFERENTIAL (V) 10 Figure 8. Quiescent Current versus Output Current 4.0 14 0.1 1.0 Iout, OUTPUT CURRENT (A) 100 125 TJ = 25°C 0 10 20 30 40 Vin–Vout, INPUT–OUTPUT VOLTAGE DIFFERENTIAL (V) MOTOROLA ANALOG IC DEVICE DATA Figure 12. Load Transient Response ∆ Vout , OUTPUT VOLTAGE DEVIATION (V) Figure 11. Line Transient Response 0.8 Vout = 5.0 V Iout = 150 mA CO = 0 TJ = 25°C 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 Iout , OUTPUT CURRENT (A) ∆ Vin , INPUT VOLTAGE CHANGE (V) ∆ Vout , OUTPUT VOLTAGE DEVIATION (V) LM340, A Series 1.0 0.5 0 0 10 20 30 0.3 0.2 0.1 0 –0.1 Vout = 5.0 V Vin = 10 V CO = 0 TJ = 25°C –0.2 –0.3 1.5 1.0 0.5 0 40 0 10 20 30 40 t, TIME (µs) t, TIME (µs) Figure 13. Worst Case Power Dissipation versus Ambient Temperature (Case 221A) PD , POWER DISSIPATION (W) 20 16 θHS = 5°C/W 12 θHS = 15°C/W 8.0 4.0 0 –50 θJC = 5°C/W θJA = 65°C/W TJ(max) = 150°C θHS = 0°C/W No Heatsink –25 0 25 50 75 100 125 150 TA, AMBIENT TEMPERATURE (°C) MOTOROLA ANALOG IC DEVICE DATA 15 LM340, A Series APPLICATIONS INFORMATION Design Considerations The LM340, A series of fixed voltage regulators are designed with Thermal Overload Protection that shuts down the circuit when subjected to an excessive power overload condition, Internal Short Circuit Protection that limits the maximum current the circuit will pass, and Output Transistor Safe–Area Compensation that reduces the output short circuit current as the voltage across the pass transistor is increased. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long wire lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high–frequency characteristics to insure stable operation under all load conditions. A 0.33 µF or larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. Figure 14. Current Regulator Figure 15. Adjustable Output Regulator LM340–5.0 Input Output LM340–5.0 R 0.33µF IO Input Constant Current to Grounded Load 7 – 0.33µF These regulators can also be used as a current source when connected as above. In order to minimize dissipation the LM340–5.0 is chosen in this application. Resistor R determines the current as follows: 2 0.1µF 6 + 1k 3 10k 4 MC1741G 5.0 V + IQ IO = R IQ Vout, 7.0 V to 20 V Vin – VO ≥ 2.0 V ^ 1.5 mA over line and load changes For example, a 1 A current source would require R to be a 5 Ω, 10 W resistor and the output voltage compliance would be the input voltage less 7.0 V. The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics. The minimum voltage obtainable with this arrangement is 2.0 V greater than the regulator voltage. Figure 16. Current Boost Regulator Figure 17. Short Circuit Protection MJ2955 or Equiv Input RSC MJ2955 or Equiv. Input R LM340 Output 2N6049 or Equiv. R LM340 1.0µF Output 0.1µF 1.0µF The LM340, A series can be current boosted with a PNP transistor. The MJ2955 provides current to 5.0 A. Resistor R in conjuction with the VBE of the PNP determines when the pass transistor begins conducting; this circuit is not short circuit proof. Input–output differential voltage minimum is increased by VBE of the pass transistor. 16 The circuit of Figure 17 can be modified to provide supply protection against short circuits by adding a short circuit sense resistor, RSC, and an additional PNP transistor. The current sensing PNP must be able to handle the short circuit current of the three–terminal regulator. Therefore, 4.0 A plastic power transistor is specified. MOTOROLA ANALOG IC DEVICE DATA LM340, A Series OUTLINE DIMENSIONS T SUFFIX PLASTIC PACKAGE CASE 221A–06 ISSUE Y –T– B C F T S SEATING PLANE NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION Z DEFINES A ZONE WHERE ALL BODY AND LEAD IRREGULARITIES ARE ALLOWED. 4 A Q 1 2 3 U H K Z L R V J G D N MOTOROLA ANALOG IC DEVICE DATA DIM A B C D F G H J K L N Q R S T U V Z INCHES MIN MAX 0.570 0.620 0.380 0.405 0.160 0.190 0.025 0.035 0.142 0.147 0.095 0.105 0.110 0.155 0.018 0.025 0.500 0.562 0.045 0.060 0.190 0.210 0.100 0.120 0.080 0.110 0.045 0.055 0.235 0.255 0.000 0.050 0.045 ––– ––– 0.080 MILLIMETERS MIN MAX 14.48 15.75 9.66 10.28 4.07 4.82 0.64 0.88 3.61 3.73 2.42 2.66 2.80 3.93 0.46 0.64 12.70 14.27 1.15 1.52 4.83 5.33 2.54 3.04 2.04 2.79 1.15 1.39 5.97 6.47 0.00 1.27 1.15 ––– ––– 2.04 17 LM340, A Series NOTES 18 MOTOROLA ANALOG IC DEVICE DATA LM340, A Series NOTES MOTOROLA ANALOG IC DEVICE DATA 19 LM340, A Series Motorola reserves the right to make changes without further notice to any products herein. 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