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USC EE 459Lx - LM7805

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©2006 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com LM78XX/LM78XXA Rev. 1.0 LM78XX/LM78XXA 3-Terminal 1A Positive Voltage Regulator March 2008 LM78XX/LM78XXA3-Terminal 1A Positive Voltage Regulator Features ■ Output Current up to 1A ■ Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24 ■ Thermal Overload Protection ■ Short Circuit Protection ■ Output Transistor Safe Operating Area Protection General Description The LM78XX series of three terminal positive regulatorsare available in the TO-220 package and with severalfixed output voltages, making them useful in a widerange of applications. Each type employs internal currentlimiting, thermal shut down and safe operating area pro-tection, making it essentially indestructible. If adequateheat sinking is provided, they can deliver over 1A outputcurrent. Although designed primarily as fixed voltageregulators, these devices can be used with external com-ponents to obtain adjustable voltages and currents. Ordering Information Product Number Output Voltage Tolerance Package Operating Temperature LM7805CT ± 4% TO-220 -40°C to +125°CLM7806CTLM7808CTLM7809CTLM7810CTLM7812CTLM7815CTLM7818CTLM7824CTLM7805ACT ± 2% 0°C to +125°CLM7806ACTLM7808ACTLM7809ACTLM7810ACTLM7812ACTLM7815ACTLM7818ACTLM7824ACT2 www.fairchildsemi.com LM78XX/LM78XXA Rev. 1.0 LM78XX/LM78XXA 3-Terminal 1A Positive Voltage RegulatorBlock Diagram Figure 1. Pin Assignment Figure 2. Absolute Maximum Ratings Absolute maximum ratings are those values beyond which damage to the device may occur. The datasheet specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation outside datasheet specifications. Symbol Parameter Value Unit V I Input Voltage V O = 5V to 18V 35 VV O = 24V 40 VR θ JC Thermal Resistance Junction-Cases (TO-220) 5 °C/WR θ JA Thermal Resistance Junction-Air (TO-220) 65 °C/WT OPR Operating Temperature Range LM78xx -40 to +125 °CLM78xxA 0 to +125T STG Storage Temperature Range -65 to +150 °CStartingCircuitInput1ReferenceVoltageCurrentGeneratorSOAProtectionThermalProtectionSeries PassElementErrorAmplifierOutput3GND211. Input2. GND3. OutputGNDTO-2203 www.fairchildsemi.com LM78XX/LM78XXA Rev. 1.0 LM78XX/LM78XXA 3-Terminal 1A Positive Voltage RegulatorElectrical Characteristics (LM7805) Refer to the test circuits. -40°C < T J < 125°C, I O = 500mA, V I = 10V, C I = 0.1 µ F, unless otherwise specified. Notes: 1. Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.2. These parameters, although guaranteed, are not 100% tested in production. Symbol Parameter Conditions Min. Typ. Max. Unit V O Output Voltage T J = +25°C 4.8 5.0 5.2 V5mA ≤ I O ≤ 1A, P O ≤ 15W, V I = 7V to 20V4.75 5.0 5.25Regline Line Regulation (1) T J = +25°C V O = 7V to 25V – 4.0 100 mVV I = 8V to 12V – 1.6 50.0Regload Load Regulation (1) T J = +25°C I O = 5mA to 1.5A – 9.0 100 mVI O = 250mA to 750mA – 4.0 50.0I Q Quiescent Current T J = +25°C – 5.0 8.0 mA ∆ I Q Quiescent Current Change I O = 5mA to 1A – 0.03 0.5 mAV I = 7V to 25V – 0.3 1.3 ∆ V O / ∆ T Output Voltage Drift (2) I O = 5mA – -0.8 – mV/°CV N Output Noise Voltage f = 10Hz to 100kHz, T A = +25°C – 42.0 – µ V/V O RR Ripple Rejection (2) f = 120Hz, V O = 8V to 18V 62.0 73.0 – dBV DROP Dropout Voltage I O = 1A, T J = +25°C – 2.0 – Vr O Output Resistance (2) f = 1kHz – 15.0 – m Ω I SC Short Circuit Current V I = 35V, T A = +25°C – 230 – mAI PK Peak Current (2) T J = +25°C – 2.2 – A4 www.fairchildsemi.com LM78XX/LM78XXA Rev. 1.0 LM78XX/LM78XXA 3-Terminal 1A Positive Voltage RegulatorElectrical Characteristics (LM7806) (Continued)Refer to the test circuits. -40°C < T J < 125°C, I O = 500mA, V I = 11V, C I = 0.33 µ F, C O = 0.1 µ F, unless otherwise specified. Notes: 3. Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.4. These parameters, although guaranteed, are not 100% tested in production. Symbol Parameter Conditions Min Typ. Max. Unit V O Output Voltage T J = +25°C 5.75 6.0 6.25 V5mA ≤ I O ≤ 1A, P O ≤ 15W, V I = 8.0V to 21V5.7 6.0 6.3Regline Line Regulation (3) T J = +25°C V I = 8V to 25V – 5.0 120 mVV I = 9V to 13V – 1.5 60.0Regload Load Regulation (3) T J = +25°C I O = 5mA to 1.5A – 9.0 120 mVI O = 250mA to 750mA – 3.0 60.0I Q Quiescent Current T J = +25°C – 5.0 8.0 mA ∆ I Q Quiescent Current ChangeI O = 5mA to 1A – – 0.5 mAV I = 8V to 25V – – 1.3 ∆ V O / ∆ T Output Voltage Drift (4) I O = 5mA – -0.8 – mV/°CV N Output Noise Voltage f = 10Hz to 100kHz, T A = +25°C – 45.0 – µ V/V O RR Ripple Rejection (4) f = 120Hz, V O = 8V to 18V 62.0 73.0 – dBVDROPDropout Voltage IO = 1A, TJ = +25°C – 2.0 – VrOOutput Resistance(4)f = 1kHz – 19.0 – mΩISCShort Circuit Current VI = 35V, TA = +25°C – 250 – mAIPKPeak Current(4)TJ = +25°C – 2.2 – A5 www.fairchildsemi.comLM78XX/LM78XXA Rev. 1.0LM78XX/LM78XXA 3-Terminal 1A Positive Voltage RegulatorElectrical Characteristics (LM7808) (Continued)Refer to the test circuits. -40°C < TJ < 125°C, IO = 500mA, VI = 14V, CI = 0.33µF, CO = 0.1µF, unless otherwise specified.Notes:5. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.6. These parameters, although guaranteed, are not 100% tested in production.Symbol Parameter Conditions Min. Typ. Max. UnitVOOutput Voltage TJ = +25°C 7.7 8.0 8.3 V5mA ≤ IO ≤ 1A, PO ≤ 15W, VI = 10.5V to 23V7.6 8.0 8.4Regline Line Regulation(5)TJ = +25°C VI = 10.5V to 25V – 5.0 160 mVVI = 11.5V to 17V – 2.0 80.0Regload Load Regulation(5)TJ = +25°C IO = 5mA to 1.5A – 10.0 160 mVIO = 250mA to 750mA – 5.0 80.0IQQuiescent Current TJ = +25°C – 5.0 8.0 mA∆IQQuiescent Current Change IO = 5mA to 1A – 0.05 0.5 mAVI = 10.5V to 25V – 0.5 1.0∆VO/∆T Output Voltage Drift(6)IO = 5mA – -0.8 – mV/°CVNOutput Noise Voltage f = 10Hz to 100kHz, TA = +25°C – 52.0 – µV/VORR Ripple


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