MC78M00, MC78M00A Series 500 mA Positive 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. http://onsemi.com MARKING DIAGRAMS TO-220-3 T SUFFIX CASE 221A Heatsink surface connected to Pin 2. Features * * * * * * No External Components Required Internal Thermal Overload Protection 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 Pb-Free Packages are Available 1.0 k 1 2 3 xx XX A WL Y WW 4 Input 1.0 k 210 1 2 6.7 V 16 k 300 100 1.0 k 3.6 k 300 10 pF 5.6 k 0.24 13 2.6 k 520 50 2.0 k 6.0 k 3 = Voltage Option = Appropriate Suffix Options = Assembly Location = Wafer Lot = Year = Work Week DPAK-3 DT SUFFIX CASE 369C xxxxx ALYWW Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. 200 3.0 k 6.4 k MC 78MxxXXT AWLYWW 200 Output 40 pF xxxxx A L Y WW = Device Type and Voltage Option Code = Assembly Location = Wafer Lot = Year = Work Week Pin 1. Input 2. Ground 3. Output 3.9 k ORDERING INFORMATION 6.0 k 2.8 k GND See detailed ordering and shipping information in the package dimensions section on page 402 of this data sheet. This device contains 28 active transistors. DEVICE MARKING INFORMATION Figure 1. Representative Schematic Diagram See general marking information in the device marking section on page 402 of this data sheet. (c) Semiconductor Components Industries, LLC, 2004 June, 2004 - Rev. 14 393 Publication Order Number: MC78M00/D MC78M00, MC78M00A Series MAXIMUM RATINGS (TA = 25C, unless otherwise noted) (Note 1) Rating Symbol Value Unit VI 35 Vdc Input Voltage (5.0 V-18 V) (20 V-24V) 40 Power Dissipation (Package Limitation) Plastic Package, T Suffix TA = 25C PD Internally Limited Thermal Resistance, Junction-to-Air JA 70 C/W Thermal Resistance, Junction-to-Case JC 5.0 C/W PD Internally Limited Thermal Resistance, Junction-to-Air JA 92 C/W Thermal Resistance, Junction-to-Case JC 5.0 C/W Plastic Package, DT Suffix TA = 25C Operating Junction Temperature Range TJ +150 C Storage Temperature Range Tstg -65 to +150 C Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL-STD-883, Method 3015. Machine Model Method 200 V. MC78M05C/AC/B/AB ELECTRICAL CHARACTERISTICS (VI = 10 V, IO = 350 mA, TJ = Tlow to Thigh, PD 5.0 W, unless otherwise noted) (Note 2) Characteristics Symbol Output Voltage (TJ = 25C) MC78M05C MC78M05AC VO Output Voltage Variation (7.0 Vdc VI 20 Vdc, 5.0 mA IO 350 mA) MC78M05C MC78M05AC VO Line Regulation (TJ = 25C, 7.0 Vdc VI 25 Vdc, IO = 200 mA) Regline Load Regulation (TJ = 25C, 5.0 mA IO 500 mA) (TJ = 25C, 5.0 mA IO 200 mA) Regload Input Bias Current (TJ = 25C) IIB Quiescent Current Change (8.0 Vdc VI 25 Vdc, IO = 200 mA) (5.0 mA IO 350 mA) IIB Output Noise Voltage (TA = 25C, 10 Hz f 100 kHz) Vn 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 = 25C) RR Dropout Voltage (TJ = 25C) Short Circuit Current Limit (TJ = 25C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25C) 2. Tlow = 0C for MC78MxxAC, C = -40C for MC78MxxAB, B 394 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 50 - - 20 10 100 50 - 3.2 6.0 - - - - 0.8 0.5 - 40 - mV mV mA mA V dB 62 62 - 80 - - VI-VO - 2.0 - Vdc IOS - 50 - mA VO/T - 0.2 - mV/C IO - 700 - mA Thigh = +125C for MC78MxxAB, AC, B, C http://onsemi.com Min MC78M00, MC78M00A Series MC78M06C ELECTRICAL CHARACTERISTICS (VI = 11 V, IO = 350 mA, 0C < TJ < 125C, PD 5.0 W, unless otherwise noted) Characteristics Output Voltage (TJ = 25C) Output Voltage Variation (8.0 Vdc VI 21 Vdc, 5.0 mA IO 350 mA) Line Regulation (TJ = 25C, 8.0 Vdc VI 25 Vdc, IO = 200 mA) Load Regulation (TJ = 25C, 5.0 mA IO 500 mA) (TJ = 25C, 5.0 mA IO 200 mA) Symbol Min Typ Max Unit VO VO 5.75 5.7 6.0 - 6.25 6.3 Vdc Vdc Regline - 5.0 50 mV - - 20 10 120 60 - 3.2 6.0 - - - - - 45 0.8 0.5 - VI - VO 59 59 - - 80 2.0 - - - Vdc IOS VO/T - - 50 0.2 - - mA mV/C IO - 700 - mA Unit Regload Input Bias Current (TJ = 25C) Quiescent Current Change (9.0 Vdc VI 25 Vdc, IO = 200 mA) (5.0 mA IO 350 mA) Output Noise Voltage (TA = 25C, 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 = 25C) Dropout Voltage (TJ = 25C) Short Circuit Current Limit (TJ = 25C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25C) IIB IIB Vn RR mV mA mA V dB MC78M08C/AC/B/AB ELECTRICAL CHARACTERISTICS (VI = 14 V, IO = 350 mA, TJ = Tlow to Thigh, PD 5.0 W, unless otherwise noted) (Note 3) Characteristics Symbol Output Voltage (TJ = 25C) MC78M08C MC78M08AC Output Voltage Variation (10.5 Vdc VI 23 Vdc, 5.0 mA IO 350 mA) MC78M08C MC78M08AC Line Regulation (TJ = 25C, 10.5 Vdc VI 25 Vdc, IO = 200 mA) Load Regulation (TJ = 25C, 5.0 mA IO 500 mA) (TJ = 25C, 5.0 mA IO 200 mA) VO Typ Max 7.70 7.84 8.0 8.0 8.30 8.16 Vdc VO Regline Regload Input Bias Current (TJ = 25C) IIB Quiescent Current Change (10.5 Vdc VI 25 Vdc, IO = 200 mA) (5.0 mA IO 350 mA) IIB Output Noise Voltage (TA = 25C, 10 Hz f 100 kHz) Vn 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 = 25C) Dropout Voltage (TJ = 25C) RR Short Circuit Current Limit (TJ = 25C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25C) 3. Tlow = 0C for MC78MxxAC, C = -40C for MC78MxxAB, B Min 395 7.6 7.7 - - - 6.0 8.4 8.3 50 - - 25 10 160 80 - 3.2 6.0 - - - - 0.8 0.5 - 52 - mV mV mA mA V dB VI-VO 56 56 - - 80 2.0 - - - Vdc IOS - 50 - mA VO/T - 0.2 - mV/C IO - 700 - mA Thigh = +125C for MC78MxxAB, AC, B, C http://onsemi.com Vdc MC78M00, MC78M00A Series MC78M09C/B ELECTRICAL CHARACTERISTICS (VI = 15 V, IO = 350 mA, TJ = Tlow to Thigh, PD 5.0 W, unless otherwise noted) (Note 4) Characteristics Output Voltage (TJ = 25C) Output Voltage Variation (11.5 Vdc VI 23 Vdc, 5.0 mA IO 350 mA) Line Regulation (TJ = 25C, 11.5 Vdc VI 25 Vdc, IO = 200 mA) Load Regulation (TJ = 25C, 5.0 mA IO 500 mA) (TJ = 25C, 5.0 mA IO 200 mA) Input Bias Current (TJ = 25C) Quiescent Current Change (11.5 Vdc VI 25 Vdc, IO = 200 mA) (5.0 mA IO 350 mA) Output Noise Voltage (TA = 25C, 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 = 25C) Dropout Voltage (TJ = 25C) Short Circuit Current Limit (TJ = 25C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25C) Symbol Min Typ Max Unit VO VO 8.64 8.55 9.0 - 9.45 9.45 Vdc Vdc Regline - 6.0 50 mV - - - 25 10 3.2 180 90 6.0 - - - - - 52 0.8 0.5 - VI-VO 56 56 - - 80 2.0 - - - Vdc IOS VO/T - - 50 0.2 - - mA mV/C IO - 700 - mA Unit Regload IIB IIB Vn RR mV mA mA V dB MC78M12C/AC/B/AB ELECTRICAL CHARACTERISTICS (VI = 19 V, IO = 350 mA, TJ = Tlow to Thigh, PD 5.0 W, unless otherwise noted) (Note 4) Characteristics Symbol Output Voltage (TJ = 25C) MC78M12C MC78M12AC Output Voltage Variation (14.5 Vdc VI 27 Vdc, 5.0 mA IO 350 mA) MC78M12C MC78M12AC Line Regulation (TJ = 25C, 14.5 Vdc VI 30 Vdc, IO = 200 mA) Load Regulation (TJ = 25C, 5.0 mA IO 500 mA) (TJ = 25C, 5.0 mA IO 200 mA) Input Bias Current (TJ = 25C) Quiescent Current Change (14.5 Vdc VI 30 Vdc, IO = 200 mA) (5.0 mA IO 350 mA) Output Noise Voltage (TA = 25C, 10 Hz f 100 kHz) 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 = 25C) Dropout Voltage (TJ = 25C) Short Circuit Current Limit (TJ = 25C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25C) 4. Tlow = 0C for MC78MxxAC, C = -40C for MC78MxxAB, B VO Min Typ Max 11.50 11.76 12 12 12.50 12.24 Vdc VO 11.4 11.5 - - - 8.0 12.6 12.5 50 - - - 25 10 3.2 240 120 6.0 - - - - - 75 0.8 0.5 - VI-VO 55 55 - - 80 2.0 - - - Vdc IOS VO/T - - 50 0.3 - - mA mV/C IO - 700 - mA Regline Regload IIB IIB Vn RR Thigh = +125C for MC78MxxAB, AC, B, C http://onsemi.com 396 Vdc mV mV mA mA V dB MC78M00, MC78M00A Series MC78M15C/AC/B/AB ELECTRICAL CHARACTERISTICS (VI = 23 V, IO = 350 mA, TJ = Tlow to Thigh, PD 5.0 W, unless otherwise noted) (Note 5) Symbol Characteristics Output Voltage (TJ = 25C) MC78M15C MC78M15AC Output Voltage Variation (17.5 Vdc VI 30 Vdc, 5.0 mA IO 350 mA) MC78M15C MC78M15AC Input Regulation (TJ = 25C, 17.5 Vdc VI 30 Vdc, IO = 200 mA) Load Regulation (TJ = 25C, 5.0 mA IO 500 mA) (TJ = 25C, 5.0 mA IO 200 mA) Input Bias Current (TJ = 25C) Quiescent Current Change (17.5 Vdc VI 30 Vdc, IO = 200 mA) (5.0 mA IO 350 mA) Output Noise Voltage (TA = 25C, 10 Hz f 100 kHz) 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 = 25C) Dropout Voltage (TJ = 25C) Short Circuit Current Limit (TJ = 25C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25C) VO Min Typ Max 14.4 14.7 15 15 15.6 15.3 Unit Vdc VO Vdc 14.25 14.40 - - - 10 15.75 15.60 50 - - - 25 10 3.2 300 150 6.0 - - - - - 90 0.8 0.5 - VI-VO 54 54 - - 70 2.0 - - - Vdc IOS VO/T - - 50 0.3 - - mA mV/C IO - 700 - mA Regline Regload IIB IIB Vn RR mV mV mA mA V dB MC78M18C/B ELECTRICAL CHARACTERISTICS (VI = 27 V, IO = 350 mA, TJ = Tlow to Thigh, PD 5.0 W, unless otherwise noted) (Note 5) Characteristics Output Voltage (TJ = 25C) Output Voltage Variation (21 Vdc VI 33 Vdc, 5.0 mA IO 350 mA) Line Regulation (TJ = 25C, 21 Vdc VI 33 Vdc, IO = 200 mA) Load Regulation (TJ = 25C, 5.0 mA IO 500 mA) (TJ = 25C, 5.0 mA IO 200 mA) Input Bias Current (TJ = 25C) Quiescent Current Change (21 Vdc VI 33 Vdc, IO = 200 mA) (5.0 mA IO 350 mA) Output Noise Voltage (TA = 25C, 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 = 25C) Dropout Voltage (TJ = 25C) Short Circuit Current Limit (TJ = 25C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25C) 5. Tlow = 0C for MC78MxxAC, C = -40C for MC78MxxAB, B Symbol Min Typ Max Unit VO VO 17.3 17.1 18 - 18.7 18.9 Vdc Vdc Regline - 10 50 mV - - - 30 10 3.2 360 180 6.5 - - - - - 100 0.8 0.5 - VI-VO 53 53 - - 70 2.0 - - - Vdc IOS VO/T - - 50 0.3 - - mA mV/C IO - 700 - mA Regload IIB IIB Vn RR Thigh = +125C for MC78MxxAB, AC, B, C http://onsemi.com 397 mV mA mA V dB MC78M00, MC78M00A Series MC78M20C/B ELECTRICAL CHARACTERISTICS (VI = 29 V, IO = 350 mA, TJ = Tlow to Thigh, PD 5.0 W, unless otherwise noted) (Note 6) Symbol Min Typ Max Unit Output Voltage (TJ = 25C) VO 19.2 20 20.8 Vdc Output Voltage Variation (23 Vdc VI 35 Vdc, 5.0 mA IO 350 mA) VO 19 - 21 Vdc Line Regulation (TJ = 25C, 23 Vdc VI 35 Vdc, IO = 200 mA) Regline - 10 50 mV Load Regulation (TJ = 25C, 5.0 mA IO 500 mA) (TJ = 25C, 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 - Vdc IOS - 50 - mA VO/T - 0.5 - mV/C IO - 700 - mA Characteristics Input Bias Current (TJ = 25C) IIB Quiescent Current Change (23 Vdc VI 35 Vdc, IO = 200 mA) (5.0 mA IO 350 mA) IIB Output Noise Voltage (TA = 25C, 10 Hz f 100 kHz) Vn 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 = 25C) RR Dropout Voltage (TJ = 25C) Short Circuit Current Limit (TJ = 25C, VI = 35 V) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25C) mV mA mA V dB MC78M24C/B ELECTRICAL CHARACTERISTICS (VI = 33 V, IO = 350 mA, TJ = Tlow to Thigh, PD 5.0 W, unless otherwise noted) (Note 6) Symbol Min Typ Max Unit Output Voltage (TJ = 25C) VO 23 24 25 Vdc Output Voltage Variation (27 Vdc VI 38 Vdc, 5.0 mA IO 350 mA) VO 22.8 - 25.2 Vdc Line Regulation (TJ = 25C, 27 Vdc VI 38 Vdc, IO = 200 mA) Regline - 10 50 mV Load Regulation (TJ = 25C, 5.0 mA IO 500 mA) (TJ = 25C, 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 - Characteristics Input Bias Current (TJ = 25C) IIB Quiescent Current Change (27 Vdc VI 38 Vdc, IO = 200 mA) (5.0 mA IO 350 mA) IIB Output Noise Voltage (TA = 25C, 10 Hz f 100 kHz) Vn 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 = 25C) RR Dropout Voltage (TJ = 25C) Short Circuit Current Limit (TJ = 25C) Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) Peak Output Current (TJ = 25C) 6. Tlow = 0C for MC78MxxAC, C = -40C for MC78MxxAB, B 398 mA mA V dB Vdc IOS - 50 - mA VO/T - 0.5 - mV/C IO - 700 - mA Thigh = +125C for MC78MxxAB, AC, B, C http://onsemi.com mV MC78M00, MC78M00A Series DEFINITIONS Input Bias Current - That part of the input current that is not delivered to the load. 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. Output Noise Voltage - The rms AC voltage at the output, with constant load and no input ripple, measured over a specified frequency range. 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. 2.4 JUNCTION-TO-AIR ( C/W) PD(max) for TA = 50C Free Air Mounted Vertically 90 2.0 2.0 oz. Copper L IIII IIII IIII 80 Minimum Size Pad 70 1.6 1.2 L 0.8 60 0.4 50 RJA 40 0 5.0 10 15 20 25 0 30 L, LENGTH OF COPPER (mm) Figure 2. DPAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length 10 PD, POWER DISSIPATION (W) R JA, THERMAL RESISTANCE 100 HS = 10C/W 5.0 3.0 2.0 Infinite Heat Sink HS = 20C/W No Heat Sink 1.0 0.5 0.3 0.2 0.1 25 JC = 5C/W PD(max) = 7.52 W 50 75 100 125 TA, AMBIENT TEMPERATURE (C) Figure 3. Worst Case Power Dissipation versus Ambient Temperature (TO-220) http://onsemi.com 399 150 PD, MAXIMUM POWER DISSIPATION (W) 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. MC78M00, MC78M00A Series 2.5 1.0 0.8 V I -V O , DROPOUT VOLTAGE (V) I O , OUTPUT CURRENT (A) 0.9 TJ = 25C 0.7 0.6 0.5 0.4 TJ = 125C 0.3 0.2 0.1 0 0 5.0 10 15 20 25 30 35 IO = 500 mA 1.5 IO = 100 mA 1.0 IO = 10 mA VO = 100 mV 0.5 0 40 0 25 50 75 100 125 150 VI - VO, DROPOUT VOLTAGE (V) TJ, JUNCTION TEMPERATURE (C) Figure 4. Peak Output Current versus Dropout Voltage Figure 5. Dropout Voltage versus Junction Temperature 100 100 Iout = 500 mA RR, RIPPLE REJECTION (dB) RR, RIPPLE REJECTION (dB) 2.0 80 Iout = 500 mA Vout = 5.0 V Vin = 10 V CO = 0 TJ = 25C 60 40 20 1.0 10 100 1.0 k 10 k 100 k 1.0 M 10 M 80 60 40 30 0.01 100 M Vout = 5.0 V Vin = 10 V CO = 0 f = 120 Hz TJ = 25C 0.1 0.5 1.0 10 f, FREQUENCY (Hz) IO, OUTPUT CURRENT (A) Figure 6. Ripple Rejection versus Frequency Figure 7. Ripple Rejection versus Output Current 5.0 4.0 I B , BIAS CURRENT (mA) I B , BIAS CURRENT (mA) TJ = 25C 3.0 TJ = 125C 2.0 TJ = 25C VO = 5.0 V IO = 0.5 A 1.0 TJ = 125C 0 0 5.0 10 15 20 25 30 4.0 TJ = 25C 3.0 2.0 TJ = 125C 1.0 35 0 0.01 40 VI, INPUT VOLTAGE (Vdc) VI-VO = 5.0 V 0.1 0.5 1.0 10 IO, OUTPUT CURRENT (A) Figure 8. Bias Current versus Input Voltage Figure 9. Bias Current versus Output Current http://onsemi.com 400 MC78M00, MC78M00A Series APPLICATIONS INFORMATION Design Considerations 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 F 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. 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 VO, 7.0 V to 20 V Vin-Vout 2.0 V MC78M05C Input 0.33 F R IO Constant Current to Grounded Load Output MC78M05C Input 7 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 = 0.33 F 6 * + 1.0 k 2 0.1 F 3 10 k 4 MC1741 5.0 V + IIB R IIB = 1.5 mA over line and load changes. 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. For example, a 500 mA current source would require R to be a 5.0, 10 W resistor and the output voltage compliance would be the input voltage less 7.0 V. Figure 10. Current Regulator Figure 11. Adjustable Output Regulator MJ2955 or Equiv. RSC Input MJ2955 or Equiv. Input R MC78MXXC Output R 1.0 F 1.0 F 2N6049 or Equiv. MC78MXXC 1.0 F Output XX = 2 digits of type number indicating voltage. 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. The circuit of Figure 12 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. Figure 12. Current Boost Regulator Figure 13. Current Boost with Short Circuit Protection http://onsemi.com 401 MC78M00, MC78M00A Series ORDERING INFORMATION Shipping Device Output Voltage Temperature Range MC78M05CDT/RK MC78M05CDTG/RKG TJ = 0 tto +125C 125C MC78M05CT MC78M05ABDT/RK Marking Rails (No Suffix) Tape & Reel (RK Suffix) DPAK-3 78M05 75 Units/Rail 2500 Units/Reel DPAK-3 8M05D 75 Units/Rail 2500 Units/Reel TO-220-3 78M05CT 50 Units/Rail - 8M05A 75 Units/Rail 2500 Units/Reel TO-220-3 78M05ABT 50 Units/Rail - DPAK-3 8M05B 75 Units/Rail 2500 Units/Reel TO-220-3 78M05BT 50 Units/Rail - DPAK-3 78M06 75 Units/Rail 2500 Units/Reel DPAK-3 (Pb-Free) 78M06 75 Units/Rail 2500 Units/Reel TO-220-3 78M06CT 50 Units/Rail - 78M08 75 Units/Rail 2500 Units/Reel DPAK-3 (Pb-Free) MC78M05ACDT/RK MC78M05ACT Package 78M05ACT 50V 5.0 DPAK-3 MC78M05ABDTG DPAK-3 (Pb-Free) TJ = -40 40 tto +125C 125C MC78M05ABT MC78M05BDT/RK MC78M05BT MC78M06CDT/RK MC78M06CDTG 6.0 V TJ = 0 to +125C MC78M06CT TJ = -40 to +125C MC78M06BT MC78M08CDT/RK 78M06BT DPAK-3 MC78M08CDT/RKG DPAK-3 (Pb-Free) MC78M08ACDT/RK DPAK-3 8M08D 75 Units/Rail 2500 Units/Reel TO-220-3 78M08CT 50 Units/Rail - TO-220-3 (Pb-Free) 78M08CT 50 Units/Rail - TO-220-3 78M08ACT 50 Units/Rail - DPAK-3 8M08A 75 Units/Rail 2500 Units/Reel TO-220-3 78M08ABT 50 Units/Rail - DPAK-3 8M08B 75 Units/Rail 2500 Units/Reel DPAK-3 (Pb-Free) 8M08B 75 Units/Rail 2500 Units/Reel TO-220-3 78M08BT 50 Units/Rail - DPAK-3 78M09 75 Units/Rail 2500 Units/Reel TO-220-3 78M09CT 50 Units/Rail - TO-220-3 (Pb-Free) 78M09CT 50 Units/Rail - DPAK-3 8M09B 75 Units/Rail 2500 Units/Reel TO-220-3 78M09BT 50 Units/Rail - DPAK-3 78M12 75 Units/Rail 2500 Units/Reel DPAK-3 (Pb-Free) 78M12 75 Units/Rail 2500 Units/Reel DPAK-3 8M12D 75 Units/Rail 2500 Units/Reel MC78M12CT TO-220-3 78M12CT 50 Units/Rail - MC78M12CTG TO-220-3 (Pb-Free) 78M12CT 50 Units/Rail - TJ = 0 to +125C MC78M08CT MC78M08CTG MC78M08ACT 80V 8.0 MC78M08ABDT/RK MC78M08ABT MC78M08BDT/RK TJ = -40 to +125C MC78M08BDTG/RKG MC78M08BT MC78M09CDT/RK MC78M09CDTG/RKG MC78M09CT MC78M09CTG TJ = 0 to +125C 90V 9.0 MC78M09BDT/RK TJ = -40 40 to +125C MC78M09BT MC78M12CDT/RK MC78M12CDTG/RKG MC78M12ACDT/RK 12 V TJ = 0 to +125C DPAK-3 (Pb-Free) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. http://onsemi.com 402 MC78M00, MC78M00A Series ORDERING INFORMATION Shipping Device Output Voltage MC78M12ACT Temperature Range Package Marking Rails (No Suffix) TJ = 0 to +125C TO-220-3 78M12ACT 50 Units/Rail - DPAK-3 8M12A 75 Units/Rail 2500 Units/Reel TO-220-3 78M12ABT 50 Units/Rail - DPAK-3 8M12B 75 Units/Rail 2500 Units/Reel DPAK-3 (Pb-Free) 8M12B 75 Units/Rail 2500 Units/Reel TJ = 0 to +125C TO-220-3 78M12BT 50 Units/Rail - TJ = 0 to +125C DPAK-3 78M15 75 Units/Rail 2500 Units/Reel MC78M12ABDT/RK MC78M12ABT MC78M12BDT/RK 12 V TJ = -40 to +125C MC78M12BDTG/RKG MC78M12BT MC78M15CDT/RK 15 V MC78M15ACDT/RK Tape & Reel (RK Suffix) 8M15D MC78M15ACDTG/RKG 15 V TJ = 0 to +125C DPAK-3 (Pb-Free) 8M15D 75 Units/Rail 2500 Units/Reel MC78M15CT 15 V TJ = 0 to +125C TO-220-3 78M15CT 50 Units/Rail - MC78M15CTG 15 V TJ = 0 to +125C TO-220-3 (Pb-Free) 78M15CT 50 Units/Rail - MC78M15ACT 15 V TJ = 0 to +125C TO-220-3 78M15ACT 50 Units/Rail - MC78M15ACTG 15 V TJ = 0 to +125C TO-220-3 (Pb-Free) 78M15ACT 50 Units/Rail - MC78M15ABDT/RK 15 V TJ = -40 to +125C DPAK-3 8M15A 75 Units/Rail 2500 Units/Reel TO-220-3 78M15ABT 50 Units/Rail - DPAK-3 8M15B 75 Units/Rail 2500 Units/Reel TO-220-3 78M15BT 50 Units/Rail - DPAK-3 78M18 75 Units/Rail 2500 Units/Reel TO-220-3 78M18CT 50 Units/Rail - MC78M15ABT MC78M15BDT/RK MC78M15BT MC78M18CDT/RK 18 V TJ = 0 to +125C MC78M18CT MC78M18BT MC78M20CT 20 V MC78M20BT MC78M24CT MC78M24BT 24 V TJ = -40 to +125C 78M18BT TJ = 0 to +125C 78M20CT TJ = -40 to +125C 78M20BT TJ = 0 to +125C 78M24CT TJ = -40 to +125C 78M24BT For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. http://onsemi.com 403