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MC7812 Dataheets PDF



Part Number MC7812
Manufacturers Motorola Semiconductor
Logo Motorola Semiconductor
Description (MC7800 Series) Three Terminal Positive Fixed Voltage Regulators
Datasheet MC7812 DatasheetMC7812 Datasheet (PDF)

( DataSheet : www.DataSheet4U.com ) Order this document by MC7800/D MC7800 Series THREE–TERMINAL POSITIVE FIXED VOLTAGE REGULATORS SEMICONDUCTOR TECHNICAL DATA 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 th.

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( DataSheet : www.DataSheet4U.com ) Order this document by MC7800/D MC7800 Series THREE–TERMINAL POSITIVE FIXED VOLTAGE REGULATORS SEMICONDUCTOR TECHNICAL DATA 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 a fixed voltage regulator, these devices can be used with external components to obtain adjustable voltages and currents. • Output Current in Excess of 1.0 A • • • • • • No External Components Required Internal Thermal Overload Protection Internal Short Circuit Current Limiting Output Transistor Safe–Area Compensation Output Voltage Offered in 2% and 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 Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. DEVICE TYPE/NOMINAL OUTPUT VOLTAGE MC7805 MC7806 MC7808 MC7809 5.0 V 6.0 V 8.0 V 9.0 V MC7812 MC7815 MC7818 MC7824 12 V 15 V 18 V 24 V STANDARD APPLICATION Input Cin* 0.33 µF MC78XX Output CO** ORDERING INFORMATION Device MC78XXACT 2% MC78XXACD2T MC78XXCT MC78XXCD2T 4% MC78XXBT MC78XXBD2T XX indicates nominal voltage. TJ = – 40° to +125°C Insertion Mount Surface Mount TJ = 0° to +125°C Surface Mount Insertion Mount Surface Mount Output Voltage Tolerance Tested Operating Temperature Range Package Insertion Mount 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. CO is not needed for stability; however, it does improve transient response. Values of less than 0.1 µF could cause instability. www.DataSheet4U.com Rev 4 ** © Motorola, Inc. 1995 www.DataSheet4U.com MOTOROLA ANALOG IC DEVICE DATA 1 MC7800 Series MAXIMUM RATINGS (TA = 25°C unless otherwise noted.) Rating Input Voltage (5.0 – 18 V) (24 V) 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 Symbol VI Value 35 40 Unit Vdc PD RθJA RθJC PD RθJA RθJA Tstg TJ Internally Limited 65 5.0 Internally Limited See Figure 13 5.0 – 65 to +150 +150 W °C/W °C/W W °C/W °C/W °C °C Representative Schematic Diagram MC7800 Vin R24 50 LAT 3A Q18 Q19 QNPN C3 Q10 QNPN R18 100 k R22 100 Q7 QNPN R17 9.0 k D1 Zener R1 10.66 k Q8 QNPN R2 1.56 k R5 4.5 k Q14 QNPN C2 3.0P Q1 QNPN 6 N+ Q4 QNPN Q13 QNPN R6 1.0 k R7 14 k Q16 Q2 QNPN 4 Diode R3 1.8 k R8 5.0 k Q3 QNPN C1 30P R9 3.0 k SUB Q11 2 R13 11660 Q9 QNPN 2 Q6 QNPN R11 15 k Q15 QNPN R20 17500 R16 600 R10 3340–(3316ACT) R21 600 1.0P D2 Zener R19 27.5 k Q20 QNPN R14 1.0 k R15 680 LAT Q17 R23 0.2 Vout 5.01 R30 18 k Sense Q5 QNPN 2 Q12 QNPN R12 3.0 k R25 6.0 k R26 3.0 k R29 9.0 k R28 9.0 k R27 9.0 k This device contains 22 active transistors. 2 MOTOROLA ANALOG IC DEVICE DATA MC7800 Series ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) MC7805B Characteristic Output Voltage (TJ = 25°C) Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) 7.0 Vdc ≤ Vin ≤ 20 Vdc 8.0 Vdc ≤ Vin ≤ 20 Vdc Line Regulation, TJ = 25°C (Note 2) 7.0 Vdc ≤ Vin ≤ 25 Vdc 8.0 Vdc ≤ Vin ≤ 12 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 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 = 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 VO VO – 4.75 Regline – – – – – – – – – VI – VO Vn rO ISC Imax TCVO – – – – – – – 5.0 5.0 1.3 1.3 0.15 3.2 – – – 68 2.0 10 0.9 0.2 2.2 – 0.3 – 5.25 100 50 100 50 8.0 – 1.3 0.5 – – – – – – – 4.75 – – – – – – – – – – – – – – – – 5.0 – 5.0 1.3 1.3 0.15 3.2 – – – 68 2.0 10 0.9 0.2 2.2 – 0.3 5.25 – mV 100 50 mV 100 50 8.0 1.3 – 0.5 dB – – – – – – – A mV/°C Vdc µV/VO mΩ A mA mA Min 4.8 Typ 5.0 Max 5.2 Min 4.8 MC7805C Typ 5.0 Max 5.2 Unit Vdc Vdc Regload IB ∆IB RR ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 1.0 A, TJ = Tlow .


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