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Three Terminal Positive Voltage Regulators
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
MCT7800 Series
THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS
* * * * * *
No External Components Required Internal Thermal Overload Protection 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 Packages
T SUFFIX PLASTIC PACKAGE CASE 221A Heatsink surface connected to Pin 2.
1
2 3
Pin 1. Input 2. Ground 3. Output
D2T SUFFIX PLASTIC PACKAGE CASE 936 (D2PAK)
1
2 3
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. Input
Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2.
STANDARD APPLICATION
MCT78XX CO** Output
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
Cin* 0.33 F
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. 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 F could cause instability.
(c) Motorola, Inc. 1994 Rev 3
ORDERING INFORMATION
Device MCT78XXBD2T MCT78XXBT 4% MCT78XXCD2T MCT78XXCT XX indicates nominal voltage. TJ = 0 to +125C Surface Mount Insertion Mount TJ = - 40 to +125C Output Voltage Tolerance Tested Operating Temperature Range Package Surface Mount Insertion Mount
MOTOROLA
MCT7800 1
MCT7800
MAXIMUM RATINGS (TA = +25C, unless otherwise noted.)
Rating Input Voltage Power Dissipation Case 221A TA = +25C Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Case 936 (D2PAK) TA = +25C Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Storage Junction Temperature Range Operating Junction Temperature Symbol VI Value 35 Unit Vdc
PD JA JC PD JA JC Tstg TJ
Internally Limited 65 5.0 Internally Limited 70 5.0 - 65 to +150 +150
W C/W C/W W C/W C/W C C
Representative Schematic Diagram
Input 100 100 500 100 10 k
240 200 3.3 k 0.3 Output
6.0 k
2.0 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 Output Voltage (TJ = +25C) Output Voltage (5.0 mA IO 1.0 A, PO 15 W) 7.0 Vdc Vin 20 Vdc 8.0 Vdc Vin 20 Vdc Line Regulation, TJ = +25C (Note 2) 7.0 Vdc Vin 25 Vdc 8.0 Vdc Vin 12 Vdc Load Regulation, TJ = +25C (Note 2) 5.0 mA Vin 1.5 A 250 mA Vin 750 mA Quiescent Current (TJ = +25C) Quiescent Current Change 7.0 Vdc Vin 25 Vdc 8.0 Vdc Vin 25 Vdc 5.0 mA IO 1.0 A Ripple Rejection 8.0 Vdc Vin 18 Vdc, f = 120 Hz Dropout Voltage (IO = 1.0 A, TJ = +25C) Output Noise Voltage (TA = +25C) 10 Hz f 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25C) Vin = 35 Vdc Peak Output Current (TJ = +25C) Average Temperature Coefficient of Output Voltage Symbol VO VO -- 4.75 Regline -- -- Regload -- -- IB IB -- -- -- RR -- VI - VO Vn -- rO ISC -- Imax TCVO -- -- 0.2 2.2 0.5 -- -- -- -- -- -- 0.2 2.2 0.5 -- -- -- A mV/C -- 10 1.3 -- -- -- -- 10 1.3 -- -- m A -- 65 2.0 -- -- -- -- 65 2.0 -- -- Vdc V/VO -- -- -- -- 1.3 0.5 -- -- -- -- -- -- 1.3 -- 0.5 dB -- 2.0 1.5 5.5 100 50 8.0 -- -- -- 2.0 1.5 5.5 100 50 8.0 mA mA 7.0 2.0 100 50 -- -- 7.0 2.0 100 50 mV -- 5.0 -- 5.25 4.75 -- 5.0 -- 5.25 -- mV Min 4.8 Typ 5.0 Max 5.2 Min 4.8 MCT7805C Typ 5.0 Max 5.2 Unit Vdc Vdc
ELECTRICAL CHARACTERISTICS (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7806B Characteristics Output Voltage (TJ = +25C) Output Voltage (5.0 mA IO 1.0 A, PO 15 W) 8.0 Vdc Vin 21 Vdc 9.0 Vdc Vin 21 Vdc Line Regulation, TJ = +25C (Note 2) 8.0 Vdc Vin 25 Vdc 9.0 Vdc Vin 13 Vdc Load Regulation, TJ = +25C (Note 2) 5.0 mA Vin 1.5 A 250 mA Vin 750 mA Quiescent Current (TJ = +25C) Quiescent Current Change 8.0 Vdc Vin 25 Vdc 9.0 Vdc Vin 25 Vdc 5.0 mA IO 1.0 A Ripple Rejection 9.0 Vdc Vin 19 Vdc, f = 120 Hz
NOTES: 1. Tlow = 0C for MCT78XXC = - 40C for MCT78XXB
MCT7806C Max 6.25 -- 6.3 120 60 120 60 8.0 -- 1.3 0.5 -- Min 5.75 5.7 -- -- -- -- -- -- -- -- -- -- Typ 6.0 6.0 -- 7.0 2.0 2.0 1.5 5.5 -- -- -- 65 Max 6.25 6.3 -- mV 120 60 mV 120 60 8.0 1.3 -- 0.5 dB -- mA mA Unit Vdc Vdc
Symbol VO VO
Min 5.75 -- 5.7
Typ 6.0 -- 6.0 7.0 2.0 2.0 1.5 5.5 -- -- -- 65
Regline -- -- Regload -- -- IB IB -- -- -- RR -- --
Thigh = +125C for MCT78XXB, C. When the junction temperature exceeds +125C, 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 = +25C) Output Noise Voltage (TA = +25C) 10 Hz f 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25C) Vin = 35 Vdc Peak Output Current (TJ = +25C) Average Temperature Coefficient of Output Voltage Symbol VI - VO Vn -- rO ISC -- Imax TCVO -- -- 0.2 2.2 - 0.8 -- -- -- -- -- -- 0.2 2.2 - 0.8 -- -- -- A mV/C -- 10 1.3 -- -- -- -- 10 1.3 -- -- m A Min -- Typ 2.0 Max -- Min -- MCT7806C Typ 2.0 Max -- Unit Vdc V/VO
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7808B Characteristics Output Voltage (TJ = +25C) Output Voltage (5.0 mA IO 1.0 A, PO 15 W) 10.5 Vdc Vin 23 Vdc 11.5 Vdc Vin 23 Vdc Line Regulation, TJ = +25C (Note 2) 10.5 Vdc Vin 25 Vdc 11 Vdc Vin 17 Vdc Load Regulation, TJ = +25C (Note 2) 5.0 mA IO 1.5 A 250 mA IO 750 mA Quiescent Current (TJ = +25C) Quiescent Current Change 10.5 Vdc Vin 25 Vdc 11.5 Vdc Vin 25 Vdc 5.0 mA IO 1.0 A Ripple Rejection 11.5 Vdc Vin 21.5 Vdc, f = 120 Hz Dropout Voltage (IO = 1.0 A, TJ = +25C) Output Noise Voltage (TA = +25C) 10 Hz f 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25C) Vin = 35 Vdc Peak Output Current (TJ = +25C) Average Temperature Coefficient of Output Voltage
NOTES: 1. Tlow = 0C for MCT78XXC = - 40C for MCT78XXB
MCT7808C Max 8.3 -- 8.4 160 80 160 80 8.0 -- 1.0 0.5 -- -- -- -- -- -- -- Min 7.7 7.6 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Typ 8.0 8.0 -- 7.0 2.0 2.0 1.5 5.5 -- -- -- 63 2.0 10 18 0.2 2.2 - 0.8 Max 8.3 8.4 -- mV 160 80 mV 160 80 8.0 1.0 -- 0.5 dB -- -- -- -- -- -- -- A mV/C m A Vdc V/VO mA mA Unit Vdc Vdc
Symbol VO VO
Min 7.7 -- 7.6
Typ 8.0 -- 8.0 7.0 2.0 2.0 1.5 5.5 -- -- -- 63 2.0 10 18 0.2 2.2 - 0.8
Regline -- -- Regload -- -- IB IB -- -- -- RR -- VI - VO Vn -- rO ISC -- Imax TCVO -- -- -- -- --
Thigh = +125C for MCT78XXB, C. When the junction temperature exceeds +125C, 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 = +25C) 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 = +25C (Note 2) 11.5 Vdc Vin 26 Vdc 11.5 Vdc Vin 17 Vdc Load Regulation, TJ = +25C (Note 2) 5.0 mA IO 1.5 A 250 mA IO 750 mA Quiescent Current (TJ = +25C) Quiescent Current Change 11.5 Vdc Vin 26 Vdc 12.5 Vdc Vin 26 Vdc 5.0 mA IO 1.0 A Ripple Rejection 11.5 Vdc Vin 21.5 Vdc, f = 120 Hz Dropout Voltage (IO = 1.0 A, TJ = +25C) Output Noise Voltage (TA = +25C) 10 Hz f 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25C) Vin = 35 Vdc Peak Output Current (TJ = +25C) Average Temperature Coefficient of Output Voltage Symbol VO VO Min 8.65 -- 8.55 Regline -- -- Regload -- -- IB IB -- -- -- -- RR -- VI - VO Vn rO ISC -- Imax TCVO -- -- 0.2 2.2 -1.0 -- -- -- -- -- -- 0.2 2.2 -1.0 -- -- -- A mV/C -- -- -- 62 2.0 10 18 -- -- -- -- -- -- -- -- 62 2.0 10 18 -- -- -- -- m A Vdc V/VO 3.0 2.0 5.5 -- -- -- 50 25 8.0 -- 1.0 0.5 -- -- -- -- -- -- 3.0 2.0 5.5 -- -- -- 50 25 8.0 1.0 -- 0.5 dB mA mA 8.0 4.0 50 25 -- -- 8.0 4.0 50 25 mV Typ 9.0 -- 9.0 Max 9.35 -- 9.45 Min 8.65 8.55 -- MCT7809C Typ 9.0 9.0 -- Max 9.35 9.45 -- mV Unit Vdc Vdc
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7812B Characteristics Output Voltage (TJ = +25C) 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 = +25C (Note 2) 14.5 Vdc Vin 30 Vdc 16 Vdc Vin 22 Vdc Load Regulation, TJ = +25C (Note 2) 5.0 mA IO 1.5 A 250 mA IO 750 mA Quiescent Current (TJ = +25C) Quiescent Current Change 14.5 Vdc Vin 30 Vdc 15 Vdc Vin 30 Vdc 5.0 mA IO 1.0 A
NOTES: 1. Tlow = 0C for MCT78XXC = - 40C for MCT78XXB
MCT7812C Max 12.5 -- 12.6 240 120 240 120 8.0 -- 1.0 0.5 Min 11.5 11.4 -- -- -- -- -- -- -- -- -- Typ 12 12 -- 10 5.0 3.0 2.0 5.5 -- -- -- Max 12.5 12.6 -- mV 240 120 mV 240 120 8.0 1.0 -- 0.5 mA mA Unit Vdc Vdc
Symbol VO VO
Min 11.5 -- 11.4
Typ 12 -- 12 10 5.0 3.0 2.0 5.5 -- -- --
Regline -- -- Regload -- -- IB IB -- -- -- --
Thigh = +125C for MCT78XXB, C. When the junction temperature exceeds +125C, 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 = +25C) Output Noise Voltage (TA = +25C) 10 Hz f 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25C) Vin = 35 Vdc Peak Output Current (TJ = +25C) Average Temperature Coefficient of Output Voltage Symbol RR -- VI - VO Vn rO ISC Imax TCVO -- -- -- -- -- -- 62 2.0 10 18 0.2 2.2 -1.0 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 62 2.0 10 18 0.2 2.2 -1.0 -- -- -- -- -- -- -- A mV/C m A Vdc V/VO Min Typ Max Min MCT7812C Typ Max Unit dB
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7815B Characteristics Output Voltage (TJ = +25C) Output Voltage (5.0 mA IO 1.0 A, PO 15 W) 17.5 Vdc Vin 30 Vdc 18.5 Vdc Vin 30 Vdc Line Regulation, TJ = +25C (Note 2) 17.5 Vdc Vin 30 Vdc 20 Vdc Vin 26 Vdc Load Regulation, TJ = +25C (Note 2) 5.0 mA Vin 1.5 A 250 mA Vin 750 mA Quiescent Current (TJ = +25C) Quiescent Current Change 17.5 Vdc Vin 30 Vdc 18.5 Vdc Vin 30 Vdc 5.0 mA IO 1.0 A Ripple Rejection 18.5 Vdc Vin 28.5 Vdc, f = 120 Hz Dropout Voltage (IO = 1.0 A, TJ = +25C) Output Noise Voltage (TA = +25C) 10 Hz f 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25C) Vin = 35 Vdc Peak Output Current (TJ = +25C) Average Temperature Coefficient of Output Voltage
NOTES: 1. Tlow = 0C for MCT78XXC = - 40C for MCT78XXB
MCT7815C Max 15.6 -- 15.75 300 150 300 150 8.0 -- 1.0 0.5 -- -- -- -- -- -- -- Min 14.4 14.25 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Typ 15 15 -- 11 5.0 3.0 2.0 5.5 -- -- -- 60 2.0 10 19 0.2 2.2 -1.0 Max 15.6 15.75 -- mV 300 150 mV 300 150 8.0 1.0 -- 0.5 dB -- -- -- -- -- -- -- A mV/C m A Vdc V/VO mA mA Unit Vdc Vdc
Symbol VO VO
Min 14.4 -- 14.25
Typ 15 -- 15 11 5.0 3.0 2.0 5.5 -- -- -- 60 2.0 10 19 0.2 2.2 -1.0
Regline -- -- Regload -- -- IB IB -- -- -- RR -- VI - VO Vn -- rO ISC -- Imax TCVO -- -- -- -- --
Thigh = +125C for MCT78XXB, C. When the junction temperature exceeds +125C, 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 = +25C) 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 = +25C (Note 2) 21 Vdc Vin 33 Vdc 24 Vdc Vin 30 Vdc Load Regulation, TJ = +25C (Note 2) 5.0 mA Vin 1.5 A 250 mA Vin 750 mA Quiescent Current (TJ = +25C) 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 = +25C) Output Noise Voltage (TA = +25C) 10 Hz f 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25C) Vin = 35 Vdc Peak Output Current (TJ = +25C) Average Temperature Coefficient of Output Voltage Symbol VO VO Min 17.3 -- 17.1 Regline -- -- Regload -- -- IB IB -- -- -- -- RR -- ViI - VO Vn rO ISC Imax TCVO -- -- -- -- -- -- 59 2.0 10 19 0.2 2.2 -1.0 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 59 2.0 10 19 0.2 2.2 -1.0 -- -- -- -- -- -- -- A mV/C m A Vdc V/VO 4.0 3.0 5.5 -- -- -- 360 180 8.0 -- 1.0 0.5 -- -- -- -- -- -- 4.0 3.0 5.5 -- -- -- 360 180 8.0 1.0 -- 0.5 dB mA mA 11 5.0 360 180 -- -- 11 5.0 360 180 mV Typ 18 -- 18 Max 18.7 -- 18.9 Min 17.3 17.1 -- MCT7818C Typ 18 18 -- Max 18.7 18.9 -- mV Unit Vdc Vdc
ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7824B Characteristics Output Voltage (TJ = +25C) 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 = +25C (Note 2) 27 Vdc Vin 38 Vdc 30 Vdc Vin 36 Vdc Load Regulation, TJ = +25C (Note 2) 5.0 mA IO 1.5 A 250 mA IO 750 mA Quiescent Current (TJ = +25C) 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 = +25C) Output Noise Voltage (TA = +25C) 10 Hz f 100 kHz Output Resistance f = 1.0 kHz Short Circuit Current Limit (TA = +25C) Vin = 35 Vdc Peak Output Current (TJ = +25C) Average Temperature Coefficient of Output Voltage
NOTES: 1. Tlow = 0C for MCT78XXC = - 40C for MCT78XXB
MCT7824C Max 25 -- 25.2 480 240 480 240 8.0 -- 1.0 0.5 -- -- -- -- -- -- -- Min 23 22.8 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Typ 24 24 -- 12 6.0 5.0 4.0 5.5 -- -- -- 56 2.0 10 20 0.2 2.2 -1.5 Max 25 25.2 -- mV 480 240 mV 480 240 8.0 1.0 -- 0.5 dB -- -- -- -- -- -- -- A mV/C m A Vdc V/VO mA mA Unit Vdc Vdc
Symbol VO VO
Min 23 -- 22.8
Typ 24 -- 24 12 6.0 5.0 4.0 5.5 -- -- -- 56 2.0 10 20 0.2 2.2 -1.5
Regline -- -- Regload -- -- IB IB -- -- -- -- RR -- VI - VO Vn rO ISC Imax TCVO -- -- -- -- -- --
Thigh = +125C for MCT78XXB, C. When the junction temperature exceeds +125C, 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
4.0 I O , OUTPUT CURRENT (A) RR, RIPPLE REJECTION (dB) 80 f = 120 Hz IO = 20 mA Vin = 1.0 Vrms
Figure 2. Ripple Rejection as a Function of Output Voltages (MCT78XXC)
3.0
70
2.0 TJ = - 40C TJ = +25C 0 0 TJ = +125C 10 20 30 40 VI - VO, INPUT-OUPUT VOLTAGE DIFFERENTIAL (V)
60 Device 50 MCT7805C MCT7812C MCT7815C 6.0 8.0 Vin 10 V 19 V 23 V 10 12 14 16 18 VO, OUTPUT VOLTAGE (V) 20 22 24
1.0
40 4.0
Figure 3. Ripple Rejection as a Function of Frequency (MCT78XXC)
80 Z O, OUTPUT IMPEDANCE (m ) RR, RIPPLE REJECTION (dB) 1000 500 300 200 100 50 30 20 10 4.0
Figure 4. Output Impedance as a Function of Output Voltage (MCT78XXC)
60 Vin = 10 V VO = 5.0 V IO = 20 mA 40
f = 120 Hz IO = 500 mA CL = 0 F
20 10 100 1.0 k f, FREQUENCY (Hz) 10 k 100 k
8.0
12 16 VO, OUTPUT VOLTAGE (V)
20
24
Figure 5. Quiescent Current as a Function of Temperature
6.0 I B, QUIESCENT CURRENT (mA) 4.0 3.0 2.0 1.0 0 -75 Vin = 10 V VO = 5.0 V IO = 20 mA
- 50
- 25 0 25 50 75 TJ, JUNCTION TEMPERATURE (C)
100
125
MCT7800 8
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 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 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)
20 PD, POWER DISSIPATION (W) 16 12 8.0 4.0 0 - 50 HS = 0C/W HS = 5C/W HS = 15C/W V I - VO , INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V) JC = 5C/W JA = 65C/W TJ(max) = +150C 2.5
Figure 7. Input Output Differential as a Function of Junction Temperature
2.0 1.5 1.0 0.5 0 -75
IO = 1.0 A 200 mA 20 mA 0 mA VO = 2% of VO - - - Extended Curve for MCT78XXB - 50 - 25 0 25 50 75 TJ, JUNCTION TEMPERATURE (C) 100 125 500 mA
No Heatsink
- 25
0 25 50 75 100 TA, AMBIENT TEMPERATURE (C)
125
150
Figure 8. D2PAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
PD(max) for TA = 50C PD, MAXIMUM POWER DISSIPATION (W) 80 R JA, THERMAL RESISTANCE JUNCTION-TO-AIR ( C/W) 70 60 50 40 RJA 30 0 5.0 10 15 20 Free Air Mounted Vertically 3.5 3.0 2.5 2.0 1.5 1.0
Minimum Size Pad
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
IIII IIII IIII IIII IIII IIII
2.0 oz. Copper L L 25
30
MCT7800
OUTLINE DIMENSIONS
T SUFFIX PLASTIC PACKAGE CASE 221A-06
-TB F T
4
SEATING PLANE
C S
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. 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
Q
123
A U K
H Z L V G D N J R
DIM A B C D F G H J K L N Q R S T U V Z
D2T SUFFIX PLASTIC PACKAGE CASE 936-03 (D2PAK)
OPTIONAL CHAMFER
-T-
TERMINAL 4
A
E
U
K B
S V H F
1 2 3
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. 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
M J D 0.010 (0.254) M T G N R
L P
C
DIM A B C D E F G H J K L M N P R S U V
MCT7800 10
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
1PHX33530-3 PRINTED IN USA (8/94) MPS/POD LINEAR YCAAAA
*MCT7800/D*
MCT7800/D MOTOROLA

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