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| NCP7800 1.0 A Positive Voltage Regulators The NCP7800 series consists of 3 pin, fixed output, positive linear voltage regulators, suitable for a wide variety of applications. These regulators are extremely rugged, incorporating internal current limiting, thermal shutdown and safe-area compensation. With adequate heat sinking they can deliver output currents in excess of 1.0 A. Designed as direct replacements for the popular MC7800 family, these products offer enhanced ESD protection. Features http://onsemi.com * * * * * * * * * * 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 4% Tolerance Available in Standard 3-Lead Transistor Packages For Tighter Tolerances and Extended Operating Range Refer to MC7800 Enhanced ESD Tolerance: HBM Exceeds 4 kV and MM Exceeds 400 V These are Pb-Free Devices Input Cin* 0.33 mF NCP78XX Output CO** 1 2 3 TO-220-3 T SUFFIX CASE 221AB PIN CONNECTIONS Pin 1. Input 2. Ground 3. Output Heatsink surface connected to Pin 2 MARKING DIAGRAM 78xxT AWLYWWG xx A WL, L Y WW G = 05 = Assembly Location = Wafer Lot = Year = Work Week = Pb-Free Device 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 mF could cause instability. ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. Figure 1. Application Schematic (c) Semiconductor Components Industries, LLC, 2009 October, 2009 - Rev. 0 1 Publication Order Number: NCP7800/D NCP7800 Figure 2. Simplified Block Diagram Table 1. PIN FUNCTION DESCRIPTION Pin No. 1 2 3 Pin Name Vin GND Vout Positive Power Supply Input. Power Supply Ground; Device Substrate. Regulated Output Voltage. Description http://onsemi.com 2 NCP7800 Table 2. ABSOLUTE MAXIMUM RATINGS (Note 1) Rating Input Voltage Range Power Dissipation Maximum Junction Temperature Storage Temperature Range ESD Capability, ESD Capability, Human Body Model (Note 2) Machine Model (Note 2) (for Vout: 5.0 - 15 V) Symbol Vin PD TJ(max) Tstg ESDHBM ESDMM Value -0.3 to 35 Internally Limited 150 -65 to +150 4 400 Unit V W C C kV V Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area. 2. This device series incorporates ESD protection and is tested by the following methods: ESD Human Body Model tested per EIA/JESD22-A114 ESD Machine Model tested per EIA/JESD22-A115 Latchup Current Maximum Rating: 150 mA per JEDEC standard: JESD78 Table 3. THERMAL CHARACTERISTICS Rating Thermal Characteristics, TO220 (Note 3) Thermal Resistance, Junction-to-Case Thermal Resistance, Junction-to-Air (Note 4) Symbol RqJC RqJA Value 7.5 65 Unit C/W 3. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area. 4. Value based on thermal measurement in a test socket. Table 4. OPERATING RANGES (Note 5) Rating Input Voltage (Note 6) Junction Temperature (for Vout: 5.0 - 15 V) Symbol Vin TJ Min 7.0 0 Max 35 125 Unit V C 5. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area. 6. Minimum Vin = 7.0 V or (Vout + VDO), whichever is higher. http://onsemi.com 3 NCP7800 Table 5. ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = C to 125C, unless otherwise noted) (Note 7) NCP7805 Characteristic Output Voltage (TJ = 25C) Output Voltage (5.0 mA IO 1.0 A, PD 15 W) 7.0 Vdc Vin 20 Vdc Line Regulation (TJ = 25C) 7.5 Vdc Vin 20 Vdc 8.0 Vdc Vin 12 Vdc Load Regulation (TJ = 25C) 5.0 mA IO 1.0 A 5.0 mA IO 1.5 A Quiescent Current (TJ = 25C) Quiescent Current Change 7.0 Vdc Vin 25 Vdc 5.0 mA IO 1.0 A Ripple Rejection (Note 8) 8.0 Vdc Vin 18 Vdc, f = 120 Hz Dropout Voltage (IO = 1.0 A, TJ = 25C) (Note 8) Output Noise Voltage (TJ = 25C) (Note 8) 10 Hz f 100 kHz Output Resistance f = 1.0 kHz (Note 8) Short Circuit Current Limit (TJ = 25C) (Note 8) Vin = 35 Vdc Peak Output Current (TJ = 25C) (Note 8) Average Temperature Coefficient of Output Voltage (Note 8) Symbol VO VO Regline Min 4.8 4.75 - - - - - - - 62 - - - - - - Typ 5.0 5.0 1.1 0.6 1.5 2.9 3.0 0.28 0.07 75 2.0 6.8 0.9 0.3 2.4 0.13 Max 5.2 5.25 100 50 50 100 8 1.3 0.5 - - - - - - - Unit Vdc Vdc mV Regload mV IB DIB mA mA RR VI - VO Vn rO ISC Imax TCVO dB Vdc mV/VO mW A A mV/C 7. Performance guaranteed over the indicated operating temperature range by design and/or characterization, production tested at TJ = TA = 25C. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. 8. Value based on design and/or characterization. http://onsemi.com 4 NCP7800 TYPICAL CHARACTERISTICS 3.0 IO, OUTPUT CURRENT (A) 2.5 2.0 1.5 1.0 0.5 0 TJ = 125C RR, RIPPLE REJECTION (dB) 80 70 60 50 40 30 Vin = 8.0 V to 18 V IO = 500 mA TA = 25C TJ = 0C TJ = 25C 0 5 10 15 20 25 30 35 40 0.01 0.1 1 10 Vin - Vout, INPUT/OUTPUT VOLTAGE DIFFERENTIAL (V) f, FREQUENCY (kHz) Figure 3. Peak Output Current as a Function of Input/Output Differential Voltage 5.10 VO, OUTPUT VOLTAGE (V) 5.05 5.00 4.95 4.90 4.85 4.80 -60 Vin = 20 V IO = 5.0 mA IB, QUIESCENT CURRENT (mA) 6 5 4 3 2 1 0 -50 Figure 4. Ripple Rejection as a Function of Frequency Vin = 10 V VO = 5.0 V IL = 20 mA -20 20 60 100 140 180 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (C) TJ, JUNCTION TEMPERATURE (C) Figure 5. Output Voltage as a Function of Junction Temperature (NCP7805) Figure 6. Quiescent Current as a Function of Temperature http://onsemi.com 5 NCP7800 APPLICATIONS INFORMATION Design Considerations The NCP7800 Series of fixed voltage regulators are designed with Thermal Overload Protection that shuts down the circuit when subjected to an excessive power overload condition, Internal Short Circuit Protection that limits the maximum current the circuit will pass, and Output Transistor Safe-Area Compensation that reduces the output short circuit current as the voltage across the pass transistor is increased. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long wire lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high-frequency characteristics to insure stable operation under all load conditions. A 0.33 mF or larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. Input 0.33 mF NCP7805 R Constant Current to Grounded Load Input NCP7805 Output IO 0.33 mF The NCP7800 regulators can also be used as a current source when connected as above. In order to minimize dissipation the NCP7805 is chosen in this application. Resistor R determines the current as follows: 5.0 V I+ )I B O R IB ^ 3.2 mA over line and load changes. For example, a 1.0 A current source would require R to be a 5.0 W, 10 W resistor and the output voltage compliance would be the input voltage less 7.0 V. 1.0 k + MC34072V 10 k 0.1 mF VO = 7.0 V to 20 V VIN VO + 2.0 V The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics. The minimum voltage obtainable with this arrangement is 2.0 V greater than the regulator voltage. Figure 7. Current Regulator Figure 8. Adjustable Output Regulator MJ2955 or Equiv. 0.33 mF 2N6049 or Equiv. R NCP78XX 1.0 mF XX = 2 digits of type number indicating voltage. The circuit of Figure 9 can be modified to provide supply protection against short circuits by adding a short circuit sense resistor, RSC, and an additional PNP transistor. The current sensing PNP must be able to handle the short circuit current of the three-terminal regulator. Therefore, a four-ampere plastic power transistor is specified. Output RSource Input MJ2955 or Equiv. 0.33 mF R NCP78XX Output RSource Input RSC 10 mF 1.0 mF 1.0 mF 10 mF XX = 2 digits of type number indicating voltage. The NCP7800 series can be current boosted with a PNP transistor. The MJ2955 provides current to 5.0 A. Resistor R in conjunction with the VBE of the PNP determines when the pass transistor begins conducting; this circuit is not short circuit proof. Input/output differential voltage minimum is increased by VBE of the pass transistor. Figure 9. Current Boost Regulator Figure 10. Short Circuit Protection http://onsemi.com 6 NCP7800 20 16 PD , POWER DISSIPATION (W) 12 8.0 4.0 0 -50 qHS = 0C/W qHS = 5C/W qHS = 15C/W 2.5 Vin - Vout , INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V) qJC = 7.5C/W qJA = 65C/W TJ(max) = 150C IO = 1.0 A IO = 500 mA IO = 200 mA IO = 20 mA IO = 0 mA 2.0 1.5 1.0 0.5 No Heatsink -25 0 25 50 75 100 125 150 DVO = 2% of VO 0 -75 -50 -25 0 25 50 75 100 125 TA, AMBIENT TEMPERATURE (C) TJ, JUNCTION TEMPERATURE (C) Figure 11. Worst Case Power Dissipation vs. Ambient Temperature (TO-220) Protection Diode Figure 12. Input Output Differential as a Function of Junction Temperature The NCP7800 Series has internal low impedance (about 1 W) diode path that normally does not require protection when used in the typical regulator applications. The path connects between output and input and it can withstand a peak surge current of about 5 A for a reasonable time (several milliseconds). Normal cycling of Vin cannot generate a current surge of this magnitude for too long time since output capacitor discharges from output to input and follows input voltage therefore the magnitude of reverse current is not so high. However, when Vin is shorted or crowbarred to ground and output cap is too large and moreover if higher voltage option is used then the peak of reverse current is much higher than 5 A and lasts more than several milliseconds. In this case a damage may occur to the regulator. To protect the regulator the external bypass diode connected between output and input is recommended. The protection diode should be rated for sufficient peak current. Protection Diode Input Cin NCP78XX Output Cout Figure 13. Protection Diode Placement http://onsemi.com 7 NCP7800 DEFINITIONS Line Regulation - The change in output voltage for a change in the input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average chip temperature is not significantly affected. Load Regulation - The change in output voltage for a change in load current at constant chip temperature. Maximum Power Dissipation - The maximum total device dissipation for which the regulator will operate within specifications. ORDERING INFORMATION Device NCP7805TG Nominal Voltage 5.0 V Operating Temperature Range TJ = 0C to +125C Package TO 220 (Pb-Free) Shipping 50 Units / Rail Quiescent Current - That part of the input current that is not delivered to the load. Output Noise Voltage - The rms ac voltage at the output, with constant load and no input ripple, measured over a specified frequency range. Long Term Stability - Output voltage stability under accelerated life test conditions with the maximum rated voltage listed in the devices' electrical characteristics and maximum power dissipation. For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. http://onsemi.com 8 NCP7800 PACKAGE DIMENSIONS TO-220, SINGLE GAUGE T SUFFIX CASE 221AB-01 ISSUE O NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION Z DEFINES A ZONE WHERE ALL BODY AND LEAD IRREGULARITIES ARE ALLOWED. DIM A B C D F G H J K L N Q R S T U V Z INCHES MIN MAX 0.570 0.620 0.380 0.405 0.160 0.190 0.025 0.035 0.142 0.147 0.095 0.105 0.110 0.155 0.018 0.025 0.500 0.562 0.045 0.060 0.190 0.210 0.100 0.120 0.080 0.110 0.020 0.055 0.235 0.255 0.000 0.050 0.045 ----0.080 MILLIMETERS MIN MAX 14.48 15.75 9.66 10.28 4.07 4.82 0.64 0.88 3.61 3.73 2.42 2.66 2.80 3.93 0.46 0.64 12.70 14.27 1.15 1.52 4.83 5.33 2.54 3.04 2.04 2.79 0.508 1.39 5.97 6.47 0.00 1.27 1.15 ----2.04 -T- B 4 SEATING PLANE F T C S Q 123 A U K H Z L V G D N R J ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative http://onsemi.com 9 NCP7800/D |
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