Order this document by MC78M00/D THREE–TERMINAL MEDIUM CURRENT POSITIVE FIXED VOLTAGE REGULATORS The MC78M00/MC78M00A Series positive voltage regulators are identical to the popular MC7800 Series devices, except that they are specified for only half the output current. Like the MC7800 devices, the MC78M00 three–terminal regulators are intended for local, on–card voltage regulation. Internal current limiting, thermal shutdown circuitry and safe–area compensation for the internal pass transistor combine to make these devices remarkably rugged under most operating conditions. Maximum output current, with adequate heatsinking is 500 mA. • No External Components Required • • • • • SEMICONDUCTOR TECHNICAL DATA Internal Thermal Overload Protection T SUFFIX PLASTIC PACKAGE CASE 221A (TO–220) Internal Short Circuit Current Limiting Output Transistor Safe–Area Compensation MC78M00A High Accuracy (±2%) Available for 5.0 V, 8.0 V, 12 V and 15 V Previous Commerical Temperature Range has been extended to a Junction Temperature Range of –40°C to +125°C Heatsink surface connected to Pin 2. 1 2 3 Pin 1. Input 2. Ground 3. Output Representative Schematic Diagram 1.0 k Input 1.0 k 210 6.7 V 16 k 1 1 100 3 300 1.0 k 3.6 k DT SUFFIX PLASTIC PACKAGE CASE 369A (DPAK) 300 10 pF 5.6 k 520 50 2.6 k 2.0 k DT–1 SUFFIX PLASTIC PACKAGE CASE 369 (DPAK) 0.24 13 6.0 k 3 200 3.0 k 6.4 k 2 200 Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. Output 40 pF 3.9 k 6.0 k 2.8 k ORDERING INFORMATION Gnd Device This device contains 28 active transistors. Operating Temperature Range Package MC78MXXCDT DEVICE TYPE/NOMINAL OUTPUT VOLTAGE MC78M05AC MC78M05C MC78M06C MC78M08AC MC78M08C 5.0 V 5.0 V 6.0 V 8.0 V 8.0 V MC78M09C MC78M12AC MC78M12C MC78M15AC MC78M15C 9.0 V 12 V 12 V 15 V 15 V MC78M18C MC78M20C MC78M24C MC78MXXACDT* 18 V 20 V 24 V MC78MXXCT TO–220 MC78MXXACT* XX Indicates nominal voltage. * Available in 5.0, 8.0, 12 and 15 V devices. Motorola, Inc. 1997 MOTOROLA ANALOG IC DEVICE DATA DPAK TJ = – 40° to +125°C Rev 6 1 MC78M00 MC78M00A Series MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.) Rating Symbol Value Unit VI 35 40 Vdc Power Dissipation (Package Limitation) Plastic Package, T Suffix TA = 25°C Thermal Resistance, Junction–to–Air Thermal Resistance, Junction–to–Case PD θJA θJC Internally Limited 70 5.0 °C/W °C/W Plastic Package, DT Suffix TA = 25°C Thermal Resistance, Junction–to–Air Thermal Resistance, Junction–to–Case PD θJA θJC Internally Limited 92 5.0 °C/W °C/W TJ +150 °C Tstg –65 to +150 °C Input Voltage (5.0 V–18 V) (20 V–24V) Operating Junction Temperature Range Storage Temperature Range NOTE: ESD data available upon request. MC78M05C/AC ELECTRICAL CHARACTERISTICS (VI = 10 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.) Characteristics Symbol Output Voltage (TJ = 25°C) MC78M05C MC78M05AC VO Output Voltage Variation (7.0 Vdc ≤ VI ≤ 20 Vdc, 5.0 mA ≤ IO ≤ 350 mA) MC78M05C MC78M05AC VO Min Typ Max 4.8 4.9 5.0 5.0 5.2 5.1 Unit Vdc Vdc 4.75 4.80 – – 5.25 5.20 – 3.0 5.0 – – 20 10 100 50 – 3.2 6.0 – – – – 0.8 0.5 – 40 – 62 62 – 80 – – VI–VO – 2.0 – Vdc IOS ∆VO/∆T – 50 – mA – ±0.2 – mV/°C Peak Output Current (TJ = 25°C) IO – 700 – mA 2 MOTOROLA ANALOG IC DEVICE DATA Line Regulation (TJ = 25°C, 7.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) Regline Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) Regload Input Bias Current (TJ = 25°C) Quiescent Current Change (8.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) (5.0 mA ≤ IO ≤ 350 mA) Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) Ripple Rejection (IO = 100 mA, f = 120 Hz, 8.0 V ≤ VI ≤ 18 V) (IO = 300 mA, f = 120 Hz, 8.0 ≤ VI ≤ 18 V, TJ = 25°C) Dropout Voltage (TJ = 25°C) Short Circuit Current Limit (TJ = 25°C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) IIB ∆IIB Vn RR mV mV mA mA µV dB MC78M00 MC78M00A Series MC78M06C ELECTRICAL CHARACTERISTICS (VI = 11 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.) Characteristics Symbol Min Typ Max Unit VO VO 5.75 6.0 6.25 Vdc 5.7 – 6.3 Vdc Line Regulation (TJ = 25°C, 8.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) Regline – 5.0 50 mV Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) (TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) Regload – – 20 10 120 60 – 3.2 6.0 – – – – 0.8 0.5 – 45 – 59 59 – 80 – – Output Voltage (TJ = 25°C) Output Voltage Variation (8.0 Vdc ≤ VI ≤ 21 Vdc, 5.0 mA ≤ IO ≤ 350 mA) Input Bias Current (TJ = 25°C) Quiescent Current Change (9.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) (5.0 mA ≤ IO ≤ 350 mA) Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) Ripple Rejection (IO = 100 mA, f = 120 Hz, 9.0 V ≤ VI ≤ 19 V) (IO = 300 mA, f = 120 Hz, 9.0 V ≤ VI ≤ 19 V, TJ = 25°C) IIB ∆IIB Vn RR mV mA mA µV dB Dropout Voltage (TJ = 25°C) VI – VO – 2.0 – Vdc Short Circuit Current Limit (TJ = 25°C, VI = 35 V) IOS ∆VO/∆T – 50 – mA – ±0.2 – mV/°C IO – 700 – mA Unit Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25°C) MC78M08C/AC ELECTRICAL CHARACTERISTICS (VI = 14 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.) Characteristics Symbol Output Voltage (TJ = 25°C) MC78M08C MC78M08AC VO Output Voltage Variation (10.5 Vdc ≤ VI ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 350 mA) MC78M08C MC78M08AC VO Dropout Voltage (TJ = 25°C) Short Circuit Current Limit (TJ = 25°C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25°C) MOTOROLA ANALOG IC DEVICE DATA 8.0 8.0 8.30 8.16 Vdc Vdc – 6.0 50 – – 25 10 160 80 – 3.2 6.0 – – – – 0.8 0.5 – 52 – 56 56 – 80 – – VI–VO – 2.0 – Vdc IOS ∆VO/∆T – 50 – mA – ±0.2 – mV/°C IO – 700 – mA Regload Ripple Rejection (IO = 100 mA, f = 120 Hz, 11.5 V ≤VI ≤ 21.5 V) (IO = 300 mA, f = 120 Hz, 11.5 V ≤VI ≤ 21.5 V, TJ = 25°C) 7.70 7.84 8.4 8.3 Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) (TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) Max – – Regline Quiescent Current Change (10.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) (5.0 mA ≤ IO ≤ 350 mA) Typ 7.6 7.7 Line Regulation (TJ = 25°C, 10.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) Input Bias Current (TJ = 25°C) Min IIB ∆IIB Vn RR mV mV mA mA µV dB 3 MC78M00 MC78M00A Series MC78M09C ELECTRICAL CHARACTERISTICS (VI = 15 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.) Characteristics Symbol Min Typ Max Unit VO VO 8.64 9.0 9.45 Vdc 8.55 – 9.45 Vdc Line Regulation (TJ = 25°C, 11.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) Regline – 6.0 50 mV Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) (TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) Regload – – 25 10 180 90 – 3.2 6.0 – – – – 0.8 0.5 – 52 – 56 56 – 80 – – VI–VO – 2.0 – IOS ∆VO/∆T – 50 – mA – ±0.2 – mV/°C IO – 700 – mA Unit Output Voltage (TJ = 25°C) Output Voltage Variation (11.5 Vdc ≤ VI ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 350 mA) Input Bias Current (TJ = 25°C) Quiescent Current Change (11.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) (5.0 mA ≤ IO ≤ 350 mA) Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) Ripple Rejection (IO = 100 mA, f = 120 Hz, 12.5 V ≤VI ≤ 22.5 V) (IO = 300 mA, f = 120 Hz, 12.5 V ≤VI ≤ 22.5 V, TJ = 25°C) Dropout Voltage (TJ = 25°C) Short Circuit Current Limit (TJ = 25°C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25°C) IIB ∆IIB Vn RR mV mA mA µV dB Vdc MC78M12C/AC ELECTRICAL CHARACTERISTICS (VI = 19 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.) Characteristics Symbol Output Voltage (TJ = 25°C) MC78M12C MC78M12AC VO Output Voltage Variation (14.5 Vdc ≤ VI ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 350 mA) MC78M12C MC78M12AC VO Min Typ Max 11.50 11.76 12 12 12.50 12.24 Vdc Vdc 11.4 11.5 – – 12.6 12.5 – 8.0 50 – – 25 10 240 120 – 3.2 6.0 – – – – 0.8 0.5 – 75 – 55 55 – 80 – – VI–VO – 2.0 – Vdc IOS – 50 – mA ∆VO/∆T – ±0.3 – mV/°C Peak Output Current (TJ = 25°C) IO – 700 – mA 4 MOTOROLA ANALOG IC DEVICE DATA Line Regulation (TJ = 25°C, 14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) Regline Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) (TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) Regload Input Bias Current (TJ = 25°C) Quiescent Current Change (14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) (5.0 mA ≤ IO ≤ 350 mA) IIB Vn Ripple Rejection (IO = 100 mA, f = 120 Hz, 15 V ≤VI ≤ 25 V) (IO = 300 mA, f = 120 Hz, 15 V ≤VI ≤ 25 V, TJ = 25°C) RR Dropout Voltage (TJ = 25°C) Short Circuit Current Limit (TJ = 25°C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) mV ∆IIB Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) mV mA mA µV dB MC78M00 MC78M00A Series MC78M15C/AC ELECTRICAL CHARACTERISTICS (VI = 23 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.) Characteristics Symbol Output Voltage (TJ = 25°C) MC78M15C MC78M15AC VO Output Voltage Variation (17.5 Vdc ≤ VI ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 350 mA) MC78M15C MC78M15AC VO Dropout Voltage (TJ = 25°C) Short Circuit Current Limit (TJ = 25°C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25°C) 15 15 15.6 15.3 Vdc Vdc – 10 50 – – 25 10 300 150 – 3.2 6.0 – – – – 0.8 0.5 – 90 – 54 54 – 70 – – VI–VO – 2.0 – IOS ∆VO/∆T – 50 – mA – ±0.3 – mV/°C IO – 700 – mA Regload Ripple Rejection (IO = 100 mA, f = 120 Hz, 18.5 V ≤ VI ≤ 28.5 V) (IO = 300 mA, f = 120 Hz, 18.5 V ≤ VI ≤ 28.5 V, TJ = 25°C) 14.4 14.7 Unit 15.75 15.60 Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) (TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) Max – – Regline Quiescent Current Change (17.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) (5.0 mA ≤ IO ≤ 350 mA) Typ 14.25 14.40 Input Regulation (TJ = 25°C, 17.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) Input Bias Current (TJ = 25°C) Min IIB ∆IIB Vn RR mV mV mA mA µV dB Vdc MC78M18C ELECTRICAL CHARACTERISTICS (VI = 27 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.) Symbol Min Typ Max Unit VO VO 17.3 18 18.7 Vdc 17.1 – 18.9 Vdc Line Regulation (TJ = 25°C, 21 Vdc ≤ VI ≤ 33 Vdc, IO = 200 mA) Regline – 10 50 mV Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) (TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) Regload – – 30 10 360 180 – 3.2 6.5 – – – – 0.8 0.5 – 100 – 53 53 – 70 – – VI–VO – 2.0 – IOS ∆VO/∆T – 50 – mA – ±0.3 – mV/°C IO – 700 – mA Characteristics Output Voltage (TJ = 25°C) Output Voltage Variation (21 Vdc ≤ VI ≤ 33 Vdc, 5.0 mA ≤ IO ≤ 350 mA) Input Bias Current (TJ = 25°C) Quiescent Current Change (21 Vdc ≤ VI ≤ 33 Vdc, IO = 200 mA) (5.0 mA ≤ IO ≤ 350 mA) Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) Ripple Rejection (IO = 100 mA, f = 120 Hz, 22 V ≤ VI ≤ 32 V) (IO = 300 mA, f = 120 Hz, 22 V ≤ VI ≤ 32 V, TJ = 25°C) Dropout Voltage (TJ = 25°C) Short Circuit Current Limit (TJ = 25°C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25°C) MOTOROLA ANALOG IC DEVICE DATA IIB ∆IIB Vn RR mV mA mA µV dB Vdc 5 MC78M00 MC78M00A Series MC78M20C ELECTRICAL CHARACTERISTICS (VI = 29 V, IO = 350 mA, –30°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.) Characteristics Symbol Min Typ Max Unit VO VO 19.2 20 20.8 Vdc 19 – 21 Vdc Line Regulation (TJ = 25°C, 23 Vdc ≤ VI ≤ 35 Vdc, IO = 200 mA) Regline – 10 50 mV Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) (TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) Regload – – 30 10 400 200 – 3.2 6.5 – – – – 0.8 0.5 – 110 – 52 52 – 70 – – VI–VO – 2.0 – IOS ∆VO/∆T – 50 – mA – ±0.5 – mV/°C IO – 700 – mA Output Voltage (TJ = 25°C) Output Voltage Variation (23 Vdc ≤ VI ≤ 35 Vdc, 5.0 mA ≤ IO ≤ 350 mA) Input Bias Current (TJ = 25°C) Quiescent Current Change (23 Vdc ≤ VI ≤ 35 Vdc, IO = 200 mA) (5.0 mA ≤ IO ≤ 350 mA) Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) Ripple Rejection (IO = 100 mA, f = 120 Hz, 24 V ≤ VI ≤ 34 V) (IO = 300 mA, f = 120 Hz, 24 V ≤ VI ≤ 34 V, TJ = 25°C) Dropout Voltage (TJ = 25°C) Short Circuit Current Limit (TJ = 25°C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25°C) IIB ∆IIB Vn RR mV mA mA µV dB Vdc MC78M24C ELECTRICAL CHARACTERISTICS (VI = 33 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.) Characteristics Symbol Min Typ Max Unit VO VO 23 22.8 24 25 Vdc – 25.2 Vdc Line Regulation (TJ = 25°C, 27 Vdc ≤ VI ≤ 38 Vdc, IO = 200 mA) Regline – 10 50 mV Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) (TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) Regload – – 30 10 480 240 – 3.2 7.0 – – – – 0.8 0.5 – 170 – 50 50 – 70 – – VI–VO – 2.0 – Vdc IOS ∆VO/∆T – 50 – mA – ±0.5 – mV/°C Peak Output Current (TJ = 25°C) IO – 700 – mA 6 MOTOROLA ANALOG IC DEVICE DATA Output Voltage (TJ = 25°C) Output Voltage Variation (27 Vdc ≤ VI ≤ 38 Vdc, 5.0 mA ≤ IO ≤ 350 mA) Input Bias Current (TJ = 25°C) Quiescent Current Change (27 Vdc ≤ VI ≤ 38 Vdc, IO = 200 mA) (5.0 mA ≤ IO ≤ 350 mA) Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) Ripple Rejection (IO = 100 mA, f = 120 Hz, 28 V ≤ VI ≤ 38 V) (IO = 300 mA, f = 120 Hz, 28 V ≤ VI ≤ 38 V, TJ = 25°C) Dropout Voltage (TJ = 25°C) Short Circuit Current Limit (TJ = 25°C) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) IIB ∆IIB Vn RR mV mA mA µV dB MC78M00 MC78M00A Series 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. Maximum Power Dissipation – The maximum total device dissipation for which the regulator will operate within specifications. Input Bias 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. Long Term Stability – Output voltage stability under accelerated life test conditions with the maximum rated voltage listed in the devices’ electrical characteristics and maximum power dissipation. 2.4 100 90 JUNCTION–TO–AIR (°C/W) R θ JA, THERMAL RESISTANCE PD(max) for TA = 50°C Free Air Mounted Vertically 2.0 ÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎ 2.0 oz. Copper L 80 Minimum Size Pad 70 L 60 50 1.6 1.2 0.8 0.4 RθJA 40 0 5.0 10 15 20 PD, MAXIMUM POWER DISSIPATION (W) Figure 1. DPAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length 0 30 25 L, LENGTH OF COPPER (mm) Figure 2. Worst Case Power Dissipation versus Ambient Temperature (TO–220) PD, POWER DISSIPATION (W) 10 θHS = 10°C/W 5.0 Infinite Heat Sink θHS = 20°C/W 3.0 2.0 No Heat Sink 1.0 0.5 0.3 0.2 0.1 25 θJC = 5°C/W PD(max) = 7.52 W 50 75 100 125 150 TA, AMBIENT TEMPERATURE (°C) MOTOROLA ANALOG IC DEVICE DATA 7 MC78M00 MC78M00A Series Figure 3. Peak Output Current versus Dropout Voltage Figure 4. Dropout Voltage versus Junction Temperature 2.5 1.0 0.8 V I –V O , DROPOUT VOLTAGE (V) I O , OUTPUT CURRENT (A) 0.9 TJ = 25°C 0.7 0.6 0.5 TJ = 125°C 0.4 0.3 0.2 0.1 0 0 5.0 10 15 20 25 30 35 2.0 IO = 500 mA 1.5 IO = 100 mA 1.0 ∆VO = 100 mV 0.5 0 40 IO = 10 mA 0 25 VI – VO, DROPOUT VOLTAGE (V) 75 100 125 150 TJ, JUNCTION TEMPERATURE (°C) Figure 5. Ripple Rejection versus Frequency Figure 6. Ripple Rejection versus Output Current 100 100 Iout = 500 mA RR, RIPPLE REJECTION (dB) RR, RIPPLE REJECTION (dB) 50 80 Iout = 500 mA Vout = 5.0 V Vin = 10 V CO = 0 TJ = 25°C 60 40 20 1.0 10 100 1.0 k 10 k 100 k 1.0 M 10 M 80 Vout = 5.0 V Vin = 10 V CO = 0 f = 120 Hz TJ = 25°C 60 40 30 0.01 100 M f, FREQUENCY (Hz) 0.1 0.5 1.0 10 IO, OUTPUT CURRENT (A) Figure 7. Bias Current versus Input Voltage Figure 8. Bias Current versus Output Current 5.0 4.0 3.0 TJ = 125°C 2.0 TJ = 25°C VO = 5.0 V IO = 0.5 A 1.0 TJ = 125°C 0 0 5.0 10 15 20 25 VI, INPUT VOLTAGE (Vdc) 8 I B , BIAS CURRENT (mA) I B , BIAS CURRENT (mA) TJ = 25°C 30 4.0 TJ = 25°C 3.0 2.0 TJ = 125°C 1.0 35 40 0 0.01 VI–VO = 5.0 V 0.1 0.5 1.0 10 IO, OUTPUT CURRENT (A) MOTOROLA ANALOG IC DEVICE DATA MC78M00 MC78M00A Series APPLICATIONS INFORMATION Design Considerations The MC78M00/MC78M00A 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 regulator’s 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 9. Current Regulator Figure 10. Adjustable Output Regulator VO, 7.0 V to 20 V Vin–Vout ≥ 2.0 V MC78M05C Input 0.33 µF R IO Constant Current to Grounded Load Output MC78M05C Input 7 0.33 µF The MC78M00 regulators can also be used as a current source when connected as above. In order to minimize dissipation the MC78M05C is chosen in this application. Resistor R determines the current as follows: IO = 6 * + 1.0 k 2 0.1 µF 3 10 k 4 MC1741 5.0 V + IIB R IIB = 1.5 mA over line and load changes. For example, a 500 mA current source would require R to be a 5.0 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 12. Current Boost with Short Circuit Protection Figure 11. Current Boost Regulator MJ2955 or Equiv. Input RSC Input R MC78MXXC 1.0 µF MJ2955 or Equiv. Output 1.0 µF XX = 2 digits of type number indicating voltage. R 2N6049 or Equiv. MC78MXXC 1.0 µF Output XX = 2 digits of type number indicating voltage. The MC78M00 series can be current boosted with a PNP transistor. The MJ2955 provides current to 5.0 A. Resistor R in conjunction 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. MOTOROLA ANALOG IC DEVICE DATA The circuit of Figure NO TAG 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, a 4.0 A plastic power transistor is specified. 9 MC78M00 MC78M00A Series OUTLINE DIMENSIONS T SUFFIX PLASTIC PACKAGE CASE 221A–06 (TO–220) ISSUE Y –T– B 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. SEATING PLANE C F T S 4 DIM A B C D F G H J K L N Q R S T U V Z A Q 1 2 3 U H K Z L R V J G D N 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 DT SUFFIX PLASTIC PACKAGE CASE 369A–13 (DPAK) ISSUE Y –T– C B V E R 4 Z A S 1 2 3 U K F J L H D G 10 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. SEATING PLANE 2 PL 0.13 (0.005) M DIM A B C D E F G H J K L R S U V Z INCHES MIN MAX 0.235 0.250 0.250 0.265 0.086 0.094 0.027 0.035 0.033 0.040 0.037 0.047 0.180 BSC 0.034 0.040 0.018 0.023 0.102 0.114 0.090 BSC 0.175 0.215 0.020 0.050 0.020 ––– 0.030 0.050 0.138 ––– MILLIMETERS MIN MAX 5.97 6.35 6.35 6.73 2.19 2.38 0.69 0.88 0.84 1.01 0.94 1.19 4.58 BSC 0.87 1.01 0.46 0.58 2.60 2.89 2.29 BSC 4.45 5.46 0.51 1.27 0.51 ––– 0.77 1.27 3.51 ––– T MOTOROLA ANALOG IC DEVICE DATA MC78M00 MC78M00A Series OUTLINE DIMENSIONS DT–1 SUFFIX PLASTIC PACKAGE CASE 369–07 (DPAK) ISSUE L C B V E R 4 A 1 2 3 S –T– K SEATING PLANE J F H D G NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. DIM A B C D E F G H J K R S V INCHES MIN MAX 0.235 0.250 0.250 0.265 0.086 0.094 0.027 0.035 0.033 0.040 0.037 0.047 0.090 BSC 0.034 0.040 0.018 0.023 0.350 0.380 0.175 0.215 0.050 0.090 0.030 0.050 MILLIMETERS MIN MAX 5.97 6.35 6.35 6.73 2.19 2.38 0.69 0.88 0.84 1.01 0.94 1.19 2.29 BSC 0.87 1.01 0.46 0.58 8.89 9.65 4.45 5.46 1.27 2.28 0.77 1.27 3 PL 0.13 (0.005) MOTOROLA ANALOG IC DEVICE DATA M T 11 MC78M00 MC78M00A Series Motorola reserves the right to make changes without further notice to any products herein. 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Mfax is a trademark of Motorola, Inc. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1–303–675–2140 or 1–800–441–2447 JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4–32–1, Nishi–Gotanda, Shinagawa–ku, Tokyo 141, Japan. 81–3–5487–8488 Customer Focus Center: 1–800–521–6274 Mfax: [email protected] – TOUCHTONE 1–602–244–6609 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, Motorola Fax Back System – US & Canada ONLY 1–800–774–1848 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 – http://sps.motorola.com/mfax/ HOME PAGE: http://motorola.com/sps/ 12 ◊ MC78M00/D MOTOROLA ANALOG IC DEVICE DATA