TL780 SERIES POSITIVE-VOLTAGE REGULATORS SLVS055F – APRIL 1981 – REVISED DECEMBER 1999 D D D D D D ±1% Output Tolerance at 25°C ±2% Output Tolerance Over Full Operating Range Thermal Shutdown Internal Short-Circuit Current Limiting Pinout Identical to µA7800 Series Improved Version of µA7800 Series description Each fixed-voltage precision regulator in the TL780 series is capable of supplying 1.5 A of load current. A unique temperature-compensation technique, coupled with an internally trimmed band-gap reference, has resulted in improved accuracy when compared to other three-terminal regulators. Advanced layout techniques provide excellent line, load, and thermal regulation. The internal current-limiting and thermal-shutdown features make the devices essentially immune to overload. The TL780-xxC series regulators are characterized for operation over the virtual junction temperature range of 0°C to 125°C. KC PACKAGE (TOP VIEW) KTE PACKAGE (TOP VIEW) OUTPUT COMMON INPUT OUTPUT COMMON The COMMON terminal is in electrical contact with the mounting base. TO-220AB O C INPUT The COMMON terminal is in electrical contact with the mounting base. I O C I AVAILABLE OPTIONS PACKAGED DEVICES TJ VO TYP (V) 0°C to 125°C 15 CHIP FORM (Y) HEAT-SINK MOUNTED (KC) PLASTIC FLANGE MOUNTED (KTE) 5 TL780-05CKC TL780-05CKTE TL780-05Y 12 TL780-12CKC TL780-12CKTE TL780-12Y TL780-15CKC TL780-15CKTE TL780-15Y The KTE package is available taped and reeled. Add the suffix R to the device type (e.g., TL780-05CKTER). Chip forms are tested at 25°C. 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 1999, 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 TL780 SERIES POSITIVE-VOLTAGE REGULATORS SLVS055F – APRIL 1981 – REVISED DECEMBER 1999 schematic INPUT OUTPUT COMMON 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TL780 SERIES POSITIVE-VOLTAGE REGULATORS SLVS055F – APRIL 1981 – REVISED DECEMBER 1999 absolute maximum ratings over operating temperature range (unless otherwise noted)† Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Package thermal impedance, θJA (see Notes 1 and 2): KC package . . . . . . . . . . . . . . . . . . . . . . . . . . . 22°C/W KTE package . . . . . . . . . . . . . . . . . . . . . . . . . 23°C/W Operating free-air, TA; case, TC; or virtual junction, TJ, temperature range . . . . . . . . . . . . . . . . . 0°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C † 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), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability. Due to variations in individual device electrical characteristics and thermal resistance, the built-in thermal overload protection may be activated at power levels slightly above or below the rated dissipation. 2. The package thermal impedance is calculated in accordance with JESD 51. recommended operating conditions Input voltage, VI MIN MAX TL780-05C 7 25 TL780-12C 14.5 30 TL780-15C 17.5 Output current, IO Operating virtual junction temperature, TJ 0 UNIT V 30 1.5 A 125 °C electrical characteristics at specified virtual junction temperature, VI = 10 V, IO = 500 mA (unless otherwise noted) PARAMETER Output voltage IO = 5 mA to 1 A,, VI = 7 V to 20 V Input voltage regulation VI = 7 V to 25 V VI = 8 V to 12 V Ripple rejection Output voltage regulation Output resistance Temperature coefficient of output voltage MIN TYP MAX 25°C 4.95 5 5.05 0°C to 125°C 4.9 P ≤ 15 W,, 25°C VI = 8 V to 18 V, IO = 5 mA to 1.5 A f = 120 Hz IO = 250 mA to 750 mA f = 1 kHz Output noise voltage IO = 5 mA f = 10 Hz to 100 kHz Dropout voltage IO = 1 A 0°C to 125°C 25°C VI = 7 V to 25 V IO = 5 mA to 1 A 70 5.1 0.5 5 0.5 5 85 4 25 15 0.0035 0°C to 125°C 0.25 Short-circuit output current mV µV 25°C 2 25°C 5 8 0.7 1.3 0.003 0.5 750 mV mV/°C 75 25°C V W 25°C 0°C to 125°C UNIT dB 1.5 0°C to 125°C Input bias current current change Input bias bias-current TL780-05C TJ‡ TEST CONDITIONS V mA mA mA Peak output current 25°C 2.2 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-µF capacitor across the input and a 0.22-µF capacitor across the output. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 TL780 SERIES POSITIVE-VOLTAGE REGULATORS SLVS055F – APRIL 1981 – REVISED DECEMBER 1999 electrical characteristics at specified virtual junction temperature, VI = 19 V, IO = 500 mA (unless otherwise noted) PARAMETER Output voltage IO = 5 mA to 1 A,, VI = 14.5 V to 27 V Input voltage regulation VI = 14.5 V to 30 V VI = 16 V to 22 V Ripple rejection Output voltage regulation Output resistance Temperature coefficient of output voltage VI = 15 V to 25 V, IO = 5 mA to 1.5 A MIN TYP MAX 25°C 11.88 12 12.12 0°C to 125°C 11.76 P ≤ 15 W,, 25°C f = 120 Hz IO = 250 mA to 750 mA f = 1 kHz Output noise voltage IO = 5 mA f = 10 Hz to 100 kHz Dropout voltage IO = 1 A 0°C to 125°C VI = 14.5 V to 30 V IO = 5 mA to 1 A 65 25°C 12.24 1.2 12 1.2 12 80 UNIT V mV dB 6.5 60 2.5 36 mV 0°C to 125°C 0.0035 0°C to 125°C 0.6 mV/°C 25°C 180 µV 25°C 2 V 25°C 5.5 8 0.4 1.3 0.03 0.5 Input bias current Input bias bias-current current change TL780-12C TJ† TEST CONDITIONS 0°C to 125°C Short-circuit output current 25°C W 350 mA mA mA Peak output current 25°C 2.2 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-µF capacitor across the input and a 0.22-µF capacitor across the output. electrical characteristics at specified virtual junction temperature, VI = 23 V, IO = 500 mA (unless otherwise noted) PARAMETER Output voltage IO = 5 mA to 1 A, VI = 17.5 V to 30 V Input voltage regulation VI = 17.5 V to 30 V VI = 20 V to 26 V Ripple rejection Output voltage regulation Output resistance Temperature coefficient of output voltage MIN TYP MAX 25°C 14.85 15 15.15 0°C to 125°C 14.7 P ≤ 15 W, 25°C VI = 18.5 V to 28.5 V, IO = 5 mA to 1.5 A IO = 250 mA to 750 mA f = 1 kHz Output noise voltage IO = 5 mA f = 10 Hz to 100 kHz Dropout voltage IO = 1 A f = 120 Hz 0°C to 125°C 25°C Input bias bias-current current change 60 15.3 1.5 15 1.5 15 75 UNIT V mV dB 7 75 2.5 45 mV 0°C to 125°C 0.0035 0°C to 125°C 0.62 mV/°C 25°C 225 µV 25°C 2 V 25°C 5.5 8 0.4 1.3 0.02 0.5 Input bias current VI = 17.5 V to 30 V IO = 5 mA to 1 A TL780-15C TJ† TEST CONDITIONS 0°C to 125°C Short-circuit output current 25°C 230 W mA mA mA Peak output current 25°C 2.2 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-µF capacitor across the input and a 0.22-µF capacitor across the output. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TL780 SERIES POSITIVE-VOLTAGE REGULATORS SLVS055F – APRIL 1981 – REVISED DECEMBER 1999 electrical characteristics, VI = 10 V, IO = 500 mA, TJ = 25°C (unless otherwise noted) TEST CONDITIONS† PARAMETER Output voltage Input voltage regulation IO = 5 mA to 1 A, VI = 7 V to 25 V TL780-05Y MIN P ≤ 15 W TYP 5 0.5 1.5 Output noise voltage IO = 250 mA to 750 mA f = 10 Hz to 100 kHz Dropout voltage IO = 1 A mV 4 mV µV 75 Input bias current Short-circuit output current UNIT V 0.5 VI = 8 V to 12 V IO = 5 mA to 1.5 A Output voltage regulation MAX 2 V 5 mA 750 mA Peak output current 2.2 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-µF capacitor across the input and a 0.22-µF capacitor across the output. electrical characteristics, VI = 19 V, IO = 500 mA, TJ = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS† Output voltage IO = 5 mA to 1 A, VI = 14.5 V to 30 V Input voltage regulation TL780-12Y MIN P ≤ 15 W TYP 12 1.2 VI = 16 V to 22 V IO = 5 mA to 1.5 A 1.2 2.5 Output noise voltage IO = 250 mA to 750 mA f = 10 Hz to 100 kHz Dropout voltage IO = 1 A Output voltage regulation 6.5 180 MAX UNIT V mV mV µV 2 V Input bias current 5.5 mA Short-circuit output current 350 mA Peak output current 2.2 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-µF capacitor across the input and a 0.22-µF capacitor across the output. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 TL780 SERIES POSITIVE-VOLTAGE REGULATORS SLVS055F – APRIL 1981 – REVISED DECEMBER 1999 electrical characteristics, VI = 23 V, IO = 500 mA, TJ = 25°C (unless otherwise noted) TEST CONDITIONS† PARAMETER Output voltage P ≤ 15 W IO = 5 mA to 1 A, VI = 17.5 V to 30 V Input voltage regulation TL780-15Y MIN TYP 15 1.5 VI = 20 V to 26 V IO = 5 mA to 1.5 A 1.5 2.5 Output resistance IO = 250 mA to 750 mA f = 1 kHz Output noise voltage f = 10 Hz to 100 kHz Dropout voltage IO = 1 A Output voltage regulation 7 MAX UNIT V mV mV 0.0035 W 225 µV 2 V Input bias current 5.5 mA Short-circuit output current 230 mA Peak output current 2.2 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-µF capacitor across the input and a 0.22-µF capacitor across the output. PARAMETER MEASUREMENT INFORMATION INPUT I C1 = 0.33 µF (see Note A) TL780 O C C2 = 0.22 µF (see Note B) NOTES: A. C1 is required when the regulator is far from the power-supply filter. B. C2 is not required for stability; however, transient response is improved. C. Permanent damage can occur when OUTPUT is pulled below ground. Figure 1. Test Circuit 6 POST OFFICE BOX 655303 OUTPUT (see Note C) • DALLAS, TEXAS 75265 TL780 SERIES POSITIVE-VOLTAGE REGULATORS SLVS055F – APRIL 1981 – REVISED DECEMBER 1999 APPLICATION INFORMATION TL780-xx INPUT In + COMMON R1 VO(Reg) C1 0.33 µF GND IL Out VI – TL780-xx OUTPUT IO –VO IO = (VO/R1) + IO Bias Current Figure 2. Positive Regulator in Negative Configuration (VI Must Float) Figure 3. Current Regulator 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 4. This protects the regulator from output polarity reversals during startup and short-circuit operation. TL780-xx VI VO 1N4001 or Equivalent –VO Figure 4. Output Polarity-Reversal-Protection Circuit reverse-bias protection Occasionally, the input voltage to the regulator can collapse faster than the output voltage. This, for example, could occur 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 employed, as shown in Figure 5. VI TL780-xx VO Figure 5. Reverse-Bias-Protection Circuit POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. 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