Order this document by MCT7800/D These voltage regulators are monolithic integrated circuits designed as fixed-voltage regulators for a wide variety of applications including local, on-card regulation. These regulators employ internal current limiting, thermal shutdown, and safe-area compensation. With adequate heatsinking they can deliver output currents in excess of 1.0 A. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. • Output Current in Excess of 1.0 A • • • • • • THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS No External Components Required Internal Thermal Overload Protection T SUFFIX PLASTIC PACKAGE CASE 221A Internal Short Circuit Current Limiting Output Transistor Safe-Area Compensation Output Voltage Offered with a 4% Tolerance Available in Surface Mount D2PAK and Standard 3-Lead Transistor Heatsink surface connected to Pin 2. 1 Packages 2 3 Pin 1. Input 2. Ground 3. Output D2T SUFFIX PLASTIC PACKAGE CASE 936 (D2PAK) 1 2 3 Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. This MCT-prefixed device is intended to be a possible replacement for the similar device with the MC-prefix. Because the MCT device originates from different source material, there may be subtle differences in typical parameter values or characteristic curves. Due to the diversity of potential applications, Motorola can not assure identical performance in all circuits. Motorola recommends that the customer qualify the MCT-prefixed device in each potential application. STANDARD APPLICATION Input Cin* 0.33 µF DEVICE TYPE/NOMINAL OUTPUT VOLTAGE MCT7805 MCT7806 MCT7808 MCT7809 5.0 V 6.0 V 8.0 V 9.0 V MCT7812 MCT7815 MCT7818 MCT7824 12 V 15 V 18 V 24 V MCT78XX Output CO** A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V above the output voltage even during the low point on the input ripple voltage. ORDERING INFORMATION Device Output Voltage Tolerance Tested Operating Temperature Range Package Surface Mount MCT78XXBD2T TJ = – 40° to +125°C MCT78XXBT Insertion Mount 4% Surface Mount MCT78XXCD2T MCT78XXCT TJ = 0° to +125°C Insertion Mount XX, these two digits of the type number indicate nominal voltage. ** Cin is required if regulator is located an appreciable distance from power supply filter. ** Some CO is recommended for stability; it does improve transient response. Values less than 0.1 µF could cause instability. XX indicates nominal voltage. Motorola, Inc. 1994 MOTOROLA Rev 3 MCT7800 1 MCT7800 MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.) Rating Symbol Value Unit VI 35 Vdc PD θJA θJC Internally Limited 65 5.0 W °C/W °C/W PD θJA θJC Internally Limited 70 5.0 W °C/W °C/W Tstg – 65 to +150 °C TJ +150 °C Input Voltage Power Dissipation Case 221A TA = +25°C Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Case 936 (D2PAK) TA = +25°C Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Storage Junction Temperature Range Operating Junction Temperature Representative Schematic Diagram Input 100 100 100 10 k 500 240 200 0.3 Output 3.3 k 2.0 k 6.0 k 0.25 k 2.7 k 1.4 k 28 k 30 pF 5.0 k 500 6.0 k 1.0 k 5.0 k Gnd This device contains 19 active transistors. MCT7800 2 MOTOROLA MCT7800 ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7805B Characteristics MCT7805C Symbol Min Typ Max Min Typ Max Unit Output Voltage (TJ = +25°C) VO 4.8 5.0 5.2 4.8 5.0 5.2 Vdc Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) 7.0 Vdc ≤ Vin ≤ 20 Vdc 8.0 Vdc ≤ Vin ≤ 20 Vdc VO — 4.75 — 5.0 — 5.25 4.75 — 5.0 — 5.25 — — — 7.0 2.0 100 50 — — 7.0 2.0 100 50 — — 2.0 1.5 100 50 — — 2.0 1.5 100 50 — 5.5 8.0 — 5.5 8.0 — — — — — — — 1.3 0.5 — — — — — — 1.3 — 0.5 — 65 — — 65 — — 2.0 — — 2.0 — — 10 — — 10 — — 1.3 — — 1.3 — — 0.2 — — 0.2 — Imax — 2.2 — — 2.2 — A TCVO — 0.5 — — 0.5 — mV/°C Line Regulation, TJ = +25°C (Note 2) 7.0 Vdc ≤ Vin ≤ 25 Vdc 8.0 Vdc ≤ Vin ≤ 12 Vdc Regline Load Regulation, TJ = +25°C (Note 2) 5.0 mA ≤ Vin ≤ 1.5 A 250 mA ≤ Vin ≤ 750 mA Regload Quiescent Current (TJ = +25°C) IB Quiescent Current Change 7.0 Vdc ≤ Vin ≤ 25 Vdc 8.0 Vdc ≤ Vin ≤ 25 Vdc 5.0 mA ≤ IO ≤ 1.0 A ∆IB Ripple Rejection 8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz RR Dropout Voltage (IO = 1.0 A, TJ = +25°C) VI – VO Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn Output Resistance f = 1.0 kHz rO Short Circuit Current Limit (TA = +25°C) Vin = 35 Vdc ISC Peak Output Current (TJ = +25°C) Average Temperature Coefficient of Output Voltage Vdc mV mV mA mA dB Vdc µV/VO mΩ A ELECTRICAL CHARACTERISTICS (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7806B Characteristics MCT7806C Symbol Min Typ Max Min Typ Max Unit Output Voltage (TJ = +25°C) VO 5.75 6.0 6.25 5.75 6.0 6.25 Vdc Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) 8.0 Vdc ≤ Vin ≤ 21 Vdc 9.0 Vdc ≤ Vin ≤ 21 Vdc VO — 5.7 — 6.0 — 6.3 5.7 — 6.0 — 6.3 — — — 7.0 2.0 120 60 — — 7.0 2.0 120 60 — — 2.0 1.5 120 60 — — 2.0 1.5 120 60 — 5.5 8.0 — 5.5 8.0 — — — — — — — 1.3 0.5 — — — — — — 1.3 — 0.5 — 65 — — 65 — Line Regulation, TJ = +25°C (Note 2) 8.0 Vdc ≤ Vin ≤ 25 Vdc 9.0 Vdc ≤ Vin ≤ 13 Vdc Regline Load Regulation, TJ = +25°C (Note 2) 5.0 mA ≤ Vin ≤ 1.5 A 250 mA ≤ Vin ≤ 750 mA Regload Quiescent Current (TJ = +25°C) IB Quiescent Current Change 8.0 Vdc ≤ Vin ≤ 25 Vdc 9.0 Vdc ≤ Vin ≤ 25 Vdc 5.0 mA ≤ IO ≤ 1.0 A ∆IB Ripple Rejection 9.0 Vdc ≤ Vin ≤ 19 Vdc, f = 120 Hz RR NOTES: Vdc mV mV mA mA dB 1. Tlow = 0°C for MCT78XXC = – 40°C for MCT78XXB Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting will reduce the output current to less than 1.0 A at a VI–VO of 15 V or greater. The MC7800 die will supply more current under the same conditions. 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 MCT7800 3 MCT7800 ELECTRICAL CHARACTERISTICS (continued) (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7806B Characteristics Dropout Voltage (IO = 1.0 A, TJ = +25°C) Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz MCT7806C Symbol Min Typ Max Min Typ Max Unit VI – VO — 2.0 — — 2.0 — Vdc — 10 — — 10 — — 1.3 — — 1.3 — — 0.2 — — 0.2 — µV/VO Vn Output Resistance f = 1.0 kHz rO Short Circuit Current Limit (TA = +25°C) Vin = 35 Vdc ISC Peak Output Current (TJ = +25°C) Imax — 2.2 — — 2.2 — A TCVO — – 0.8 — — – 0.8 — mV/°C Average Temperature Coefficient of Output Voltage mΩ A ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7808B Characteristics MCT7808C Symbol Min Typ Max Min Typ Max Unit Output Voltage (TJ = +25°C) VO 7.7 8.0 8.3 7.7 8.0 8.3 Vdc Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) 10.5 Vdc ≤ Vin ≤ 23 Vdc 11.5 Vdc ≤ Vin ≤ 23 Vdc VO — 7.6 — 8.0 — 8.4 7.6 — 8.0 — 8.4 — — — 7.0 2.0 160 80 — — 7.0 2.0 160 80 — — 2.0 1.5 160 80 — — 2.0 1.5 160 80 — 5.5 8.0 — 5.5 8.0 — — — — — — — 1.0 0.5 — — — — — — 1.0 — 0.5 — 63 — — 63 — — 2.0 — — 2.0 — — 10 — — 10 — — 18 — — 18 — — 0.2 — — 0.2 — Line Regulation, TJ = +25°C (Note 2) 10.5 Vdc ≤ Vin ≤ 25 Vdc 11 Vdc ≤ Vin ≤ 17 Vdc Regline Load Regulation, TJ = +25°C (Note 2) 5.0 mA ≤ IO ≤ 1.5 A 250 mA ≤ IO ≤ 750 mA Regload Quiescent Current (TJ = +25°C) IB Quiescent Current Change 10.5 Vdc ≤ Vin ≤ 25 Vdc 11.5 Vdc ≤ Vin ≤ 25 Vdc 5.0 mA ≤ IO ≤ 1.0 A ∆IB Ripple Rejection 11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz RR Dropout Voltage (IO = 1.0 A, TJ = +25°C) VI – VO Vdc mV mV mA mA dB Vdc µV/VO Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vn Output Resistance f = 1.0 kHz rO Short Circuit Current Limit (TA = +25°C) Vin = 35 Vdc ISC Peak Output Current (TJ = +25°C) Imax — 2.2 — — 2.2 — A TCVO — – 0.8 — — – 0.8 — mV/°C Average Temperature Coefficient of Output Voltage NOTES: mΩ A 1. Tlow = 0°C for MCT78XXC = – 40°C for MCT78XXB Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting will reduce the output current to less than 1.0 A at a VI–VO of 15 V or greater. The MC7800 die will supply more current under the same conditions. 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. MCT7800 4 MOTOROLA MCT7800 ELECTRICAL CHARACTERISTICS (Vin = 15 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7809B Characteristics Output Voltage (TJ = +25°C) Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) 11.5 Vdc ≤ Vin ≤ 24 Vdc 12.5 Vdc ≤ Vin ≤ 24 Vdc Line Regulation, TJ = +25°C (Note 2) 11.5 Vdc ≤ Vin ≤ 26 Vdc 11.5 Vdc ≤ Vin ≤ 17 Vdc Load Regulation, TJ = +25°C (Note 2) 5.0 mA ≤ IO ≤ 1.5 A 250 mA ≤ IO ≤ 750 mA Quiescent Current (TJ = +25°C) Quiescent Current Change 11.5 Vdc ≤ Vin ≤ 26 Vdc 12.5 Vdc ≤ Vin ≤ 26 Vdc 5.0 mA ≤ IO ≤ 1.0 A Symbol Min Typ Max Min Typ Max Unit VO VO 8.65 9.0 9.35 8.65 9.0 9.35 Vdc — 8.55 — 9.0 — 9.45 8.55 — 9.0 — 9.45 — — — 8.0 4.0 50 25 — — 8.0 4.0 50 25 — — 3.0 2.0 50 25 — — 3.0 2.0 50 25 — 5.5 8.0 — 5.5 8.0 — — — — — — — 1.0 0.5 — — — — — — 1.0 — 0.5 — 62 — — 62 — — 2.0 — — 2.0 — mV Regload IB ∆IB RR Dropout Voltage (IO = 1.0 A, TJ = +25°C) VI – VO Vn Output Resistance f = 1.0 kHz rO Short Circuit Current Limit (TA = +25°C) Vin = 35 Vdc Peak Output Current (TJ = +25°C) ISC Average Temperature Coefficient of Output Voltage Vdc Regline Ripple Rejection 11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz MCT7809C Imax TCVO mV mA mA dB Vdc µV/VO — 10 — — 10 — — 18 — — 18 — — 0.2 — — 0.2 — — 2.2 — — 2.2 — A — –1.0 — — –1.0 — mV/°C mΩ A ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7812B Characteristics Output Voltage (TJ = +25°C) Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) 14.5 Vdc ≤ Vin ≤ 27 Vdc 15.5 Vdc ≤ Vin ≤ 27 Vdc Line Regulation, TJ = +25°C (Note 2) 14.5 Vdc ≤ Vin ≤ 30 Vdc 16 Vdc ≤ Vin ≤ 22 Vdc Load Regulation, TJ = +25°C (Note 2) 5.0 mA ≤ IO ≤ 1.5 A 250 mA ≤ IO ≤ 750 mA Quiescent Current (TJ = +25°C) Quiescent Current Change 14.5 Vdc ≤ Vin ≤ 30 Vdc 15 Vdc ≤ Vin ≤ 30 Vdc 5.0 mA ≤ IO ≤ 1.0 A NOTES: MCT7812C Symbol Min Typ Max Min Typ Max Unit VO VO 11.5 12 12.5 11.5 12 12.5 Vdc — 11.4 — 12 — 12.6 11.4 — 12 — 12.6 — — — 10 5.0 240 120 — — 10 5.0 240 120 — — 3.0 2.0 240 120 — — 3.0 2.0 240 120 — 5.5 8.0 — 5.5 8.0 — — — — — — — 1.0 0.5 — — — — — — 1.0 — 0.5 Vdc Regline mV Regload IB ∆IB mV mA mA 1. Tlow = 0°C for MCT78XXC = – 40°C for MCT78XXB Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting will reduce the output current to less than 1.0 A at a VI–VO of 15 V or greater. The MC7800 die will supply more current under the same conditions. 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 MCT7800 5 MCT7800 ELECTRICAL CHARACTERISTICS (continued) (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7812B Characteristics Ripple Rejection 15 Vdc ≤ Vin ≤ 25 Vdc, f = 120 Hz Dropout Voltage (IO = 1.0 A, TJ = +25°C) Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25°C) Vin = 35 Vdc Peak Output Current (TJ = +25°C) Average Temperature Coefficient of Output Voltage Symbol MCT7812C Min Typ Max Min Typ Max — 62 — — 62 — — 2.0 — — 2.0 — — 10 — — 10 — — 18 — — 18 — — 0.2 — — 0.2 — — 2.2 — — 2.2 — A — –1.0 — — –1.0 — mV/°C RR VI – VO Vn rO ISC Imax TCVO Unit dB Vdc µV/VO mΩ A ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7815B Characteristics MCT7815C Symbol Min Typ Max Min Typ Max Unit Output Voltage (TJ = +25°C) VO 14.4 15 15.6 14.4 15 15.6 Vdc Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) 17.5 Vdc ≤ Vin ≤ 30 Vdc 18.5 Vdc ≤ Vin ≤ 30 Vdc VO — 14.25 — 15 — 15.75 14.25 — 15 — 15.75 — — — 11 5.0 300 150 — — 11 5.0 300 150 — — 3.0 2.0 300 150 — — 3.0 2.0 300 150 — 5.5 8.0 — 5.5 8.0 — — — — — — — 1.0 0.5 — — — — — — 1.0 — 0.5 — 60 — — 60 — — 2.0 — — 2.0 — — 10 — — 10 — — 19 — — 19 — — 0.2 — — 0.2 — Line Regulation, TJ = +25°C (Note 2) 17.5 Vdc ≤ Vin ≤ 30 Vdc 20 Vdc ≤ Vin ≤ 26 Vdc Regline Load Regulation, TJ = +25°C (Note 2) 5.0 mA ≤ Vin ≤ 1.5 A 250 mA ≤ Vin ≤ 750 mA Regload Quiescent Current (TJ = +25°C) IB Quiescent Current Change 17.5 Vdc ≤ Vin ≤ 30 Vdc 18.5 Vdc ≤ Vin ≤ 30 Vdc 5.0 mA ≤ IO ≤ 1.0 A ∆IB Ripple Rejection 18.5 Vdc ≤ Vin ≤ 28.5 Vdc, f = 120 Hz RR Dropout Voltage (IO = 1.0 A, TJ = +25°C) VI – VO Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Vdc mV mV mA mA dB Vdc µV/VO Vn Output Resistance f = 1.0 kHz rO Short Circuit Current Limit (TA = +25°C) Vin = 35 Vdc ISC Peak Output Current (TJ = +25°C) Imax — 2.2 — — 2.2 — A TCVO — –1.0 — — –1.0 — mV/°C Average Temperature Coefficient of Output Voltage NOTES: mΩ A 1. Tlow = 0°C for MCT78XXC = – 40°C for MCT78XXB Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting will reduce the output current to less than 1.0 A at a VI–VO of 15 V or greater. The MC7800 die will supply more current under the same conditions. 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. MCT7800 6 MOTOROLA MCT7800 ELECTRICAL CHARACTERISTICS (Vin = 27 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7818B Characteristics Output Voltage (TJ = +25°C) Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) 21 Vdc ≤ Vin ≤ 33 Vdc 22 Vdc ≤ Vin ≤ 33 Vdc Line Regulation, TJ = +25°C (Note 2) 21 Vdc ≤ Vin ≤ 33 Vdc 24 Vdc ≤ Vin ≤ 30 Vdc Load Regulation, TJ = +25°C (Note 2) 5.0 mA ≤ Vin ≤ 1.5 A 250 mA ≤ Vin ≤ 750 mA Quiescent Current (TJ = +25°C) Quiescent Current Change 21 Vdc ≤ Vin ≤ 33 Vdc 22 Vdc ≤ Vin ≤ 33 Vdc 5.0 mA ≤ IO ≤ 1.0 A Ripple Rejection 22 Vdc ≤ Vin ≤ 32 Vdc, f = 120 Hz Dropout Voltage (IO = 1.0 A, TJ = +25°C) Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25°C) Vin = 35 Vdc Peak Output Current (TJ = +25°C) Average Temperature Coefficient of Output Voltage MCT7818C Symbol Min Typ Max Min Typ Max Unit VO VO 17.3 18 18.7 17.3 18 18.7 Vdc — 17.1 — 18 — 18.9 17.1 — 18 — 18.9 — — — 11 5.0 360 180 — — 11 5.0 360 180 — — 4.0 3.0 360 180 — — 4.0 3.0 360 180 — 5.5 8.0 — 5.5 8.0 — — — — — — — 1.0 0.5 — — — — — — 1.0 — 0.5 — 59 — — 59 — — 2.0 — — 2.0 — Vdc Regline mV Regload IB ∆IB mV mA RR ViI – VO Vn rO ISC Imax TCVO mA dB Vdc µV/VO — 10 — — 10 — — 19 — — 19 — — 0.2 — — 0.2 — — 2.2 — — 2.2 — A — –1.0 — — –1.0 — mV/°C mΩ A ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MCT7824B Characteristics Output Voltage (TJ = +25°C) Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) 27 Vdc ≤ Vin ≤ 38 Vdc 28 Vdc ≤ Vin ≤ 38 Vdc Line Regulation, TJ = +25°C (Note 2) 27 Vdc ≤ Vin ≤ 38 Vdc 30 Vdc ≤ Vin ≤ 36 Vdc Load Regulation, TJ = +25°C (Note 2) 5.0 mA ≤ IO ≤ 1.5 A 250 mA ≤ IO ≤ 750 mA Quiescent Current (TJ = +25°C) Quiescent Current Change 27 Vdc ≤ Vin ≤ 38 Vdc 28 Vdc ≤ Vin ≤ 38 Vdc 5.0 mA ≤ IO ≤ 1.0 A Ripple Rejection 28 Vdc ≤ Vin ≤ 38 Vdc, f = 120 Hz Dropout Voltage (IO = 1.0 A, TJ = +25°C) Output Noise Voltage (TA = +25°C) 10 Hz ≤ f ≤ 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25°C) Vin = 35 Vdc Peak Output Current (TJ = +25°C) Average Temperature Coefficient of Output Voltage NOTES: MCT7824C Symbol Min Typ Max Min Typ Max Unit VO VO 23 24 25 23 24 25 Vdc — 22.8 — 24 — 25.2 22.8 — 24 — 25.2 — — — 12 6.0 480 240 — — 12 6.0 480 240 — — 5.0 4.0 480 240 — — 5.0 4.0 480 240 — 5.5 8.0 — 5.5 8.0 — — — — — — — 1.0 0.5 — — — — — — 1.0 — 0.5 — 56 — — 56 — — 2.0 — — 2.0 — Vdc Regline mV Regload IB ∆IB mV mA RR VI – VO Vn rO ISC Imax TCVO mA dB Vdc µV/VO — 10 — — 10 — — 20 — — 20 — — 0.2 — — 0.2 — — 2.2 — — 2.2 — A — –1.5 — — –1.5 — mV/°C mΩ A 1. Tlow = 0°C for MCT78XXC = – 40°C for MCT78XXB Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting will reduce the output current to less than 1.0 A at a VI–VO of 15 V or greater. The MC7800 die will supply more current under the same conditions. 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 MCT7800 7 MCT7800 Figure 1. Peak Output Current as a Function of Input-Output Differential Voltage Figure 2. Ripple Rejection as a Function of Output Voltages (MCT78XXC) 80 3.0 2.0 TJ = – 40°C 1.0 TJ = +25°C RR, RIPPLE REJECTION (dB) I O , OUTPUT CURRENT (A) 4.0 TJ = +125°C 10 20 30 40 VI – VO, INPUT-OUPUT VOLTAGE DIFFERENTIAL (V) 0 0 60 Device 50 40 4.0 Figure 3. Ripple Rejection as a Function of Frequency (MCT78XXC) 6.0 8.0 Vin 10 V 19 V 23 V 10 12 14 16 18 VO, OUTPUT VOLTAGE (V) 20 22 24 1000 Z O, OUTPUT IMPEDANCE (mΩ ) RR, RIPPLE REJECTION (dB) MCT7805C MCT7812C MCT7815C Figure 4. Output Impedance as a Function of Output Voltage (MCT78XXC) 80 60 Vin = 10 V VO = 5.0 V IO = 20 mA 40 20 10 f = 120 Hz IO = 20 mA ∆Vin = 1.0 Vrms 70 100 1.0 k f, FREQUENCY (Hz) 10 k 100 k 500 300 200 100 f = 120 Hz IO = 500 mA CL = 0 µF 50 30 20 10 4.0 8.0 12 16 VO, OUTPUT VOLTAGE (V) 20 24 Figure 5. Quiescent Current as a Function of Temperature I B, QUIESCENT CURRENT (mA) 6.0 4.0 2.0 1.0 0 –75 MCT7800 8 Vin = 10 V VO = 5.0 V IO = 20 mA 3.0 – 50 – 25 0 25 50 75 TJ, JUNCTION TEMPERATURE (°C) 100 125 MOTOROLA MCT7800 APPLICATIONS INFORMATION Design Considerations The MCT7800 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 6. Worst Case Power Dissipation versus Ambient Temperature (Case 221A) θHS = 0°C/W 16 θHS = 5°C/W 12 θHS = 15°C/W 8.0 4.0 0 – 50 2.5 θJC = 5°C/W θJA = 65°C/W TJ(max) = +150°C V I – VO , INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V) PD, POWER DISSIPATION (W) 20 Figure 7. Input Output Differential as a Function of Junction Temperature No Heatsink – 25 0 25 50 75 100 TA, AMBIENT TEMPERATURE (°C) 125 IO = 1.0 A 2.0 200 mA 500 mA 1.5 20 mA 0 mA 1.0 ∆VO = 2% of VO – – – Extended Curve for MCT78XXB 0.5 0 –75 150 – 50 – 25 0 25 50 75 TJ, JUNCTION TEMPERATURE (°C) 100 125 JUNCTION-TO-AIR (° C/W) R θ JA, THERMAL RESISTANCE 80 3.5 PD(max) for TA = 50°C 70 ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ Free Air Mounted Vertically 60 2.0 oz. Copper L Minimum Size Pad 50 L 40 RθJA 30 3.0 2.5 2.0 1.5 PD, MAXIMUM POWER DISSIPATION (W) Figure 8. D2PAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length 1.0 0 5.0 10 15 20 25 30 L, LENGTH OF COPPER (mm) 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. MOTOROLA 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. 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. MCT7800 9 MCT7800 OUTLINE DIMENSIONS T SUFFIX PLASTIC PACKAGE CASE 221A-06 -TF B NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIM Z DEFINES A ZONE WHERE ALL BODY AND LEAD IRREGULARITIES ARE ALLOWED. SEATING PLANE C T S DIM A B C D F G H J K L N Q R S T U V Z 4 A Q 1 2 3 U H K Z R L J V G D 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 N D2T SUFFIX PLASTIC PACKAGE CASE 936-03 (D2PAK) OPTIONAL CHAMFER A TERMINAL 4 -T- U E S K V B H F 1 2 3 M P J N D R 0.010 (0.254) M T G C MCT7800 10 L NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. TAB CONTOUR OPTIONAL WITHIN DIMENSIONS A AND K. 4. DIMENSIONS U AND V ESTABLISH A MINIMUM MOUNTING SURFACE FOR TERMINAL 4. 5. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH OR GATE PROTRUSIONS. MOLD FLASH AND GATE PROTRUSIONS NOT TO EXCEED 0.025 (0.635) MAXIMUM. DIM A B C D E F G H J K L M N P R S U V INCHES MIN MAX 0.386 0.403 0.356 0.368 0.170 0.180 0.026 0.036 0.045 0.055 0.051 REF 0.100 BSC 0.539 0.579 0.125 MAX 0.050 REF 0.000 0.010 0.088 0.102 0.018 0.026 0.058 0.078 5 _ REF 0.116 REF 0.200 MIN 0.250 MIN MILLIMETERS MIN MAX 9.804 10.236 9.042 9.347 4.318 4.572 0.660 0.914 1.143 1.397 1.295 REF 2.540 BSC 13.691 14.707 3.175 MAX 1.270 REF 0.000 0.254 2.235 2.591 0.457 0.660 1.473 1.981 5 _ REF 2.946 REF 5.080 MIN 6.350 MIN MOTOROLA MCT7800 NOTES MOTOROLA MCT7800 11 MCT7800 Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. Literature Distribution Centers: USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan. ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. MCT7800 12 ◊ *MCT7800/D* 1PHX33530-3 PRINTED IN USA (8/94) MPS/POD LINEAR YCAAAA MCT7800/D MOTOROLA