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| A7800 SERIES POSITIVE-VOLTAGE REGULATORS SLVS056G - MAY 1976 - REVISED OCTOBER 2001 D D D D D D D 3-Terminal Regulators Output Current up to 1.5 A Internal Thermal-Overload Protection High Power-Dissipation Capability Internal Short-Circuit Current Limiting Output Transistor Safe-Area Compensation Direct Replacements for Fairchild A7800 Series KC PACKAGE (TOP VIEW) OUTPUT COMMON INPUT The COMMON terminal is in electrical contact with the mounting base. TO-220AB O C description This series of fixed-voltage monolithic integrated-circuit voltage regulators is designed for a wide range of applications. These applications include on-card regulation for elimination of noise and distribution problems associated with single-point regulation. Each of these regulators can deliver up to 1.5 A of output current. The internal current-limiting and thermal-shutdown features of these regulators essentially make them immune to overload. In addition to use as fixed-voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents, and also can be used as the power-pass element in precision regulators. The A7800C series is characterized for operation over the virtual junction temperature range of 0C to 125C. I KTE PACKAGE (TOP VIEW) OUTPUT COMMON INPUT The COMMON terminal is in electrical contact with the mounting base. O C I AVAILABLE OPTIONS PACKAGED DEVICES TJ VO(NOM) (V) 5 8 0C to 125C 10 12 15 24 PLASTIC FLANGE MOUNT (KC) A7805CKC A7808CKC A7810CKC A7812CKC A7815CKC A7824CKC HEAT-SINK MOUNTED (KTE) A7805CKTE A7808CKTE A7810CKTE A7812CKTE A7815CKTE A7824CKTE The KTE package is only available taped and reeled. Add the suffix R to the device type (e.g., A7805CKTER). Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 2001, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 1 A7800 SERIES POSITIVE-VOLTAGE REGULATORS SLVS056G - MAY 1976 - REVISED OCTOBER 2001 schematic INPUT OUTPUT COMMON absolute maximum ratings over virtual junction temperature range (unless otherwise noted) Input voltage, VI: A7824C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V All others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Package thermal impedance, JA (see Notes 1 and 2): KC package . . . . . . . . . . . . . . . . . . . . . . . . . . . 22C/W (see Notes 1 and 3): KTE package . . . . . . . . . . . . . . . . . . . . . . . . . 23C/W Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260C Virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 150C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to 150C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) - TA)/JA. Selecting the maximum of 150C can impact reliability. 2. The package thermal impedance is calculated in accordance with JESD 51-7. 3. The package thermal impedance is calculated in accordance with JESD 51-5. recommended operating conditions MIN A7805C A7808C VI Input voltage A7810C A7812C A7815C A7824C IO TJ Output current Operating virtual junction temperature A7800C series 0 7 10.5 12.5 14.5 17.5 27 MAX 25 25 28 30 30 38 1.5 125 A C V UNIT 2 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 A7800 SERIES POSITIVE-VOLTAGE REGULATORS SLVS056G - MAY 1976 - REVISED OCTOBER 2001 electrical characteristics at specified virtual junction temperature, VI = 10 V, IO = 500 mA (unless otherwise noted) PARAMETER Output voltage Input voltage regulation Ripple rejection Output voltage regulation Output resistance Temperature coefficient of output voltage Output noise voltage Dropout voltage Bias current Bias current change Short-circuit output current Peak output current VI = 7 V to 25 V IO = 5 mA to 1 A TEST CONDITIONS IO = 5 mA to 1 A, , PD 15 W VI = 7 V to 25 V VI = 8 V to 12 V VI = 8 V to 18 V, IO = 5 mA to 1.5 A IO = 250 mA to 750 mA f = 1 kHz IO = 5 mA f = 10 Hz to 100 kHz IO = 1 A f = 120 Hz VI = 7 V to 20 V, , TJ 25C 0C to 125C 25C 0C to 125C 25C 0C to 125C 0C to 125C 25C 25C 25C 0C to 125C t 25C 25C 750 2.2 62 A7805C MIN 4.8 4.75 3 1 78 15 5 0.017 -1.1 40 2 4.2 8 1.3 0.5 100 50 TYP 5 MAX 5.2 5.25 100 50 UNIT V mV dB mV mV/C V V mA mA mA A Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. All characteristics are measured with a 0.33-F capacitor across the input and a 0.1-F capacitor across the output. electrical characteristics at specified virtual junction temperature, VI = 14 V, IO = 500 mA (unless otherwise noted) PARAMETER Output voltage Input voltage regulation Ripple rejection Output voltage regulation Output resistance Temperature coefficient of output voltage Output noise voltage Dropout voltage Bias current Bias current change Short-circuit output current Peak output current VI = 10.5 V to 25 V IO = 5 mA to 1 A TEST CONDITIONS IO = 5 mA to 1 A, , PD 15 W VI = 10.5 V to 25 V VI = 11 V to 17 V VI = 11.5 V to 21.5 V, IO = 5 mA to 1.5 A IO = 250 mA to 750 mA f = 1 kHz IO = 5 mA f = 10 Hz to 100 kHz IO = 1 A f = 120 Hz VI = 10.5 V to 23 V, , TJ 25C 0C to 125C 25C 0C to 125C 25C 0C to 125C 0C to 125C 25C 25C 25C 0C to 125C 25C 25C 450 2.2 55 A7808C MIN 7.7 7.6 6 2 72 12 4 0.016 -0.8 52 2 4.3 8 1 0.5 160 80 TYP 8 MAX 8.3 8.4 160 80 UNIT V mV dB mV mV/C V V mA mA mA A Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. All characteristics are measured with a 0.33-F capacitor across the input and a 0.1-F capacitor across the output. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 A7800 SERIES POSITIVE-VOLTAGE REGULATORS SLVS056G - MAY 1976 - REVISED OCTOBER 2001 electrical characteristics at specified virtual junction temperature, VI = 17 V, IO = 500 mA (unless otherwise noted) PARAMETER Output voltage Input voltage regulation Ripple rejection Output voltage regulation Output resistance Temperature coefficient of output voltage Output noise voltage Dropout voltage Bias current Bias current change Short-circuit output current Peak output current VI = 12.5 V to 28 V IO = 5 mA to 1 A TEST CONDITIONS IO = 5 mA to 1 A, , PD 15 W VI = 12.5 V to 28 V VI = 14 V to 20 V VI = 13 V to 23 V, IO = 5 mA to 1.5 A IO = 250 mA to 750 mA f = 1 kHz IO = 5 mA f = 10 Hz to 100 kHz IO = 1 A f = 120 Hz VI = 12.5 V to 25 V, , TJ 25C 0C to 125C 25C 0C to 125C 25C 0C to 125C 0C to 125C 25C 25C 25C 0C to 125C 25C 25C 400 2.2 55 A7810C MIN 9.6 9.5 TYP 10 10 7 2 71 12 4 0.018 -1 70 2 4.3 8 1 0.5 200 100 MAX 10.4 10.5 200 100 UNIT V mV dB mV mV/C V V mA mA mA A Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. All characteristics are measured with a 0.33-F capacitor across the input and a 0.1-F capacitor across the output. electrical characteristics at specified virtual junction temperature, VI = 19 V, IO = 500 mA (unless otherwise noted) PARAMETER Output voltage Input voltage regulation Ripple rejection Output voltage regulation Output resistance Temperature coefficient of output voltage Output noise voltage Dropout voltage Bias current Bias current change Short-circuit output current Peak output current VI = 14.5 V to 30 V IO = 5 mA to 1 A TEST CONDITIONS IO = 5 mA to 1 A, , PD 15 W VI = 14.5 V to 30 V VI = 16 V to 22 V VI = 15 V to 25 V, IO = 5 mA to 1.5 A IO = 250 mA to 750 mA f = 1 kHz IO = 5 mA f = 10 Hz to 100 kHz IO = 1 A f = 120 Hz VI = 14.5 V to 27 V, , TJ 25C 0C to 125C 25C 0C to 125C 25C 0C to 125C 0C to 125C 25C 25C 25C 0C to 125C t 25C 25C 350 2.2 55 A7812C MIN 11.5 11.4 10 3 71 12 4 0.018 -1 75 2 4.3 8 1 0.5 240 120 TYP 12 MAX 12.5 12.6 240 120 UNIT V mV dB mV mV/C V V mA mA mA A Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. All characteristics are measured with a 0.33-F capacitor across the input and a 0.1-F capacitor across the output. 4 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 A7800 SERIES POSITIVE-VOLTAGE REGULATORS SLVS056G - MAY 1976 - REVISED OCTOBER 2001 electrical characteristics at specified virtual junction temperature, VI = 23 V, IO = 500 mA (unless otherwise noted) PARAMETER Output voltage Input voltage regulation Ripple rejection Output voltage regulation Output resistance Temperature coefficient of output voltage Output noise voltage Dropout voltage Bias current Bias current change Short-circuit output current Peak output current VI = 17.5 V to 30 V IO = 5 mA to 1 A TEST CONDITIONS IO = 5 mA to 1 A, , PD 15 W VI = 17.5 V to 30 V VI = 20 V to 26 V VI = 18.5 V to 28.5 V, IO = 5 mA to 1.5 A IO = 250 mA to 750 mA f = 1 kHz IO = 5 mA f = 10 Hz to 100 kHz IO = 1 A f = 120 Hz VI = 17.5 V to 30 V, , TJ 25C 0C to 125C 25C 0C to 125C 25C 0C to 125C 0C to 125C 25C 25C 25C 0C to 125C 25C 25C 230 2.1 54 A7815C MIN 14.4 14.25 11 3 70 12 4 0.019 -1 90 2 4.4 8 1 0.5 300 150 TYP 15 MAX 15.6 15.75 300 150 UNIT V mV dB mV mV/C V V mA mA mA A Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. All characteristics are measured with a 0.33-F capacitor across the input and a 0.1-F capacitor across the output. electrical characteristics at specified virtual junction temperature, VI = 33 V, IO = 500 mA (unless otherwise noted) PARAMETER Output voltage Input voltage regulation Ripple rejection Output voltage regulation Output resistance Temperature coefficient of output voltage Output noise voltage Dropout voltage Bias current Bias current change Short-circuit output current Peak output current VI = 27 V to 38 V IO = 5 mA to 1 A TEST CONDITIONS IO = 5 mA to 1 A, , PD 15 W VI = 27 V to 38 V VI = 30 V to 36 V VI = 28 V to 38 V, IO = 5 mA to 1.5 A IO = 250 mA to 750 mA f = 1 kHz IO = 5 mA f = 10 Hz to 100 kHz IO = 1 A f = 120 Hz VI = 27 V to 38 V, , TJ 25C 0C to 125C 25C 0C to 125C 25C 0C to 125C 0C to 125C 25C 25C 25C 0C to 125C 25C 25C 150 2.1 50 A7824C MIN 23 22.8 18 6 66 12 4 0.028 -1.5 170 2 4.6 8 1 0.5 480 240 TYP 24 MAX 25 25.2 480 240 UNIT V mV dB mV mV/C V V mA mA mA A Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. All characteristics are measured with a 0.33-F capacitor across the input and a 0.1-F capacitor across the output. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 5 A7800 SERIES POSITIVE-VOLTAGE REGULATORS SLVS056G - MAY 1976 - REVISED OCTOBER 2001 APPLICATION INFORMATION +V 0.33 F A78xx +VO 0.1 F Figure 1. Fixed-Output Regulator + VI - IN A78xx COM OUT IL G -VO Figure 2. Positive Regulator in Negative Configuration (VI Must Float) Input A78xx IO 0.33 F R2 R1 Output 0.1 F NOTE A: The following formula is used when Vxx is the nominal output voltage (output to common) of the fixed regulator: VO +V ) xx V xx R1 )I Q R2 Figure 3. Adjustable-Output Regulator Input 0.33 F A78xx VO(Reg) R1 Output IO IO = (VO/R1) + IO Bias Current Figure 4. Current Regulator 6 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 A7800 SERIES POSITIVE-VOLTAGE REGULATORS SLVS056G - MAY 1976 - REVISED OCTOBER 2001 APPLICATION INFORMATION 1N4001 20-V Input 0.33 F A7815C 0.1 F 1N4001 VO = 15 V 2 F -20-V Input A7915C 1 F 0.1 F 1N4001 VO = -15 V 1N4001 Figure 5. Regulated Dual Supply operation with a load common to a voltage of opposite polarity In many cases, a regulator powers a load that is not connected to ground but, instead, is connected to a voltage source of opposite polarity (e.g., operational amplifiers, level-shifting circuits, etc.). In these cases, a clamp diode should be connected to the regulator output as shown in Figure 6. This protects the regulator from output polarity reversals during startup and short-circuit operation. A78xx 1N4001 or Equivalent -VO +VI +VO Figure 6. Output Polarity-Reversal-Protection Circuit reverse-bias protection Occasionally, the input voltage to the regulator can collapse faster than the output voltage. This can occur, for example, when the input supply is crowbarred during an output overvoltage condition. If the output voltage is greater than approximately 7 V, the emitter-base junction of the series-pass element (internal or external) could break down and be damaged. To prevent this, a diode shunt can be used as shown in Figure 7. VI A78xx +VO Figure 7. Reverse-Bias-Protection Circuit POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 7 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright 2001, Texas Instruments Incorporated |
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