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MC78T05 Dataheets PDF



Part Number MC78T05
Manufacturers Fairchild
Logo Fairchild
Description 3-Terminal 3A Positive Voltage Regulator
Datasheet MC78T05 DatasheetMC78T05 Datasheet (PDF)

www.fairchildsemi.com MC78TXX 3-Terminal 3A Positive Voltage Regulator Features • • • • • • • • Output Current in Excess of 3.0A Output Transistor Safe Operating Area Compensation Power Dissipation :25W Internal Short Circuit Current Limiting Internal Thermal Overload Protection Output Voltage Offered in 4% Tolerance No External Components Required Output Voltage of 5,12 and 15V Description This family of fixed voltage regulators are monolithic integrated circuit capable of driving loads in e.

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www.fairchildsemi.com MC78TXX 3-Terminal 3A Positive Voltage Regulator Features • • • • • • • • Output Current in Excess of 3.0A Output Transistor Safe Operating Area Compensation Power Dissipation :25W Internal Short Circuit Current Limiting Internal Thermal Overload Protection Output Voltage Offered in 4% Tolerance No External Components Required Output Voltage of 5,12 and 15V Description This family of fixed voltage regulators are monolithic integrated circuit capable of driving loads in excess of 3.0 A. TO-220 GND 1 1.Input 2. GND 3. Output Internal Block Diagram INPUT 1 CURRENT GENERATOR SERIES PASS ELEMENT OUTPUT 3 SOA PROTECTION STARTING CIRCUIT REFERENCE VOLTAGE ERROR AMPLIFIER THERMAL PROTECTION GND 2 Rev. 1.0.1 ©2002 Fairchild Semiconductor Corporation MC78TXX Absolute Maximum Ratings Parameter Input Voltage (for VO = 5V to 12V) (for VO = 15V) Power Dissipation Thermal Resistance, Junction to Air (Note1, 2) Ta = +25°C Thermal Resistance, Junction to Case (Note1) Tc = +25°C Operating Junction Temperature Range Storage Temperature Range Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow. Symbol VI PD RθJA RθJC TJ TSTG Value 35 40 Internally limited 65 2.5 0 ~ +125 -65 ~ +150 Unit V V °C/W °C/W °C °C Electrical Characteristics(MC78T05) (VI = 10V, IO = 3.0 A, 0°C ≤ TJ ≤ +125°C, Po ≤ PMAX (Note3), unless otherwise specified. ) Parameter Output Voltage Symbol Vo Conditions 5mA ≤ Io ≤ 3.0A , TJ = +25°C 7.3V ≤ VI ≤ 20V, 5mA ≤ Io ≤ 2.0A 7.2V ≤ VI ≤ 35V , Io=5mA, TJ =+25°C 7.2V ≤ VI ≤ 35V , Io=1.0A, TJ = +25°C 7.5V ≤ VI ≤ 20V, Io =2.0A, TJ = +25°C 8.0V ≤ VI ≤ 12V, Io =3.0A, TJ = +25°C 5mA ≤ Io ≤ 3.0A , TJ = +25°C 5mA ≤ Io ≤ 3.0A Pulse =10ms, P = 20W TA = +25°C 5mA ≤ Io ≤ 3.0A , TJ = +25°C 5mA ≤ Io ≤ 3.0A 7.2V ≤ VI ≤ 35V, Io = 5mA TJ = +25°C ; 7.5V ≤ VI ≤ 20V, Io =2.0A ; 5mA ≤ Io ≤ 3.0A, TJ = +25°C f = 120Hz, 8V ≤ VI ≤ 18V, Io = 2.0A TJ = +25°C Io = 3A ,TJ = +25°C TA = +25°C, 10Hz ≤ f ≤ 100kHz TA = +25°C f = 1.0kHz VI = 35V, TJ =+25°C Io = 5.0mA Min. 4.8 4.75 Typ. 5.0 5.0 3.0 10 15 0.002 3.5 4.0 0.1 Max. 5.2 5.25 25 30 80 0.03 5.0 6.0 0.8 Unit V Line Regulation (Note4) ∆VO mV mV mV %Vo/W mA mA mA Load Regulation (Note4) Thermal Regulation Quiescent Current ∆VO REGT IQ - Quiescent Current Change ∆ IQ - Ripple Rejection Dropout Voltage Output Noise Voltage Peak Output Current Output Resistance Short Circuit Current Limit RR VD VN IPK Ro Isc - 75 2.2 10 5.0 2.0 1.5 0.2 2.5 2.5 - dB V µV/Vo A mΩ A mV/°C Average Temperature ∆VO/∆T Coefficient of Output Voltage Note: 3. Although power dissipation is internally limited, specifications apply only for PO ≤ Pmax, Pmax = 25W 4. Load and line regulation are specified at constant junction temperature. Change in Vo due heating effects must be taken into account separately. Pulse testing with low duty is used. 2 MC78TXX Electrical Characteristics(MC78T12) (Continued) (VI = 19V, IO =.


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