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Part: LM7800C-6
Category:
Description: 3-terminal Positive Regulators
Company: National Semiconductor Corporation
Datasheet: Download LM7800C-6 datasheet File size : 753 kB
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Datasheet text preview:
LM340/LM78MXX Series 3-Terminal Positive Regulators
February 2000
LM340/LM78MXX Series 3-Terminal Positive Regulators
General Description
The LM140/LM340A/LM340/LM7800C monolithic 3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.0A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents. Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply. The 5V, 12V, and 15V regulator options are available in the steel TO-3 power package. The LM340A/LM340/LM7800C series is available in the TO-220 plastic power package, and the LM340-5.0 is available in the SOT-223 package, as well as the LM340-5.0 and LM340-12 in the surface-mount TO-263 package.
Features
n Complete specifications at 1A load n Output voltage tolerances of ± 2% at Tj = 25°C and ± 4% over the temperature range (LM340A) n Line regulation of 0.01% of VOUT/V of VIN at 1A load (LM340A) n Load regulation of 0.3% of VOUT/A (LM340A) n Internal thermal overload protection n Internal short-circuit current limit n Output transistor safe area protection n P+ Product Enhancement tested Device LM140 LM340A/LM340 Output Voltages 5, 12, 15 5, 12, 15 5, 8, 12, 15 TO-3 (K) TO-3 (K), TO-220 (T), SOT-223 (MP), TO-263 (S) (5V and 12V only) TO-220 (T) Packages
LM7800C
Typical Applications
Fixed Output Regulator Adjustable Output Regulator
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*Required if the regulator is located far from the power supply filter. **Although no output capacitor is needed for stability, it does help transient
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response. (If needed, use 0.1 µF, ceramic disc).
VOUT = 5V + (5V/R1 + IQ) R2 5V/R1 > 3 IQ, load regulation (Lr) [(R1 + R2)/R1] (Lr of LM340-5).
Current Regulator
Comparison between SOT-223 and D-Pak (TO-252) Packages
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IQ = 1.3 mA over line and load changes.
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Scale 1:1
© 2000 National Semiconductor Corporation
DS007781
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LM340/LM78MXX
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 5) DC Input Voltage All Devices except LM7824/LM7824C LM7824/LM7824C Internal Power Dissipation (Note 2) Maximum Junction Temperature Storage Temperature Range
Lead Temperature (Soldering, 10 sec.) TO-3 Package (K) TO-220 Package (T), TO-263 Package (S) ESD Susceptibility (Note 3)
300°C 230°C 2 kV
Operating Conditions (Note 1)
35V 40V Internally Limited 150°C -65°C to +150°C Temperature Range (TA) (Note 2) LM140A, LM140 LM340A, LM340, LM7805C, LM7812C, LM7815C, LM7808C -55°C to +125°C 0°C to +125°C
LM340A Electrical Characteristics
IOUT = 1A, -55°C TJ+150°C (LM140A), or 0°C TJ+ 125°C (LM340A) unless otherwise specified (Note 4)
Output Voltage Symbol VO Input Voltage (unless otherwise noted) Parameter Output Voltage TJ = 25°C PD 15W, 5 mA IO 1A VMIN VIN VMAX VO Line Regulation IO = 500 mA VIN TJ = 25°C VIN TJ = 25°C Over Temperature VIN VO Load Regulation TJ = 25°C 5 mA IO 1.5A 250 mA IO 750 mA Over Temperature, 5 mA IO 1A IQ IQ Quiescent Current Quiescent Current Change TJ = 25°C Over Temperature 5 mA IO 1A TJ = 25°C, IO = 1A VMIN VIN VMAX IO = 500 mA VMIN VIN VMAX VN Output Noise Voltage Ripple Rejection TA = 25°C, 10 Hz f 100 kHz TJ = 25°C, f = 120 Hz, IO = 1A or f = 120 Hz, IO = 500 mA, Over Temperature, VMIN VIN VMAX RO Dropout Voltage Output Resistance Short-Circuit Current Peak Output Current Average TC of VO VIN Input Voltage Required to Maintain Line Regulation TJ = 25°C, IO = 1A f = 1 kHz TJ = 25°C TJ = 25°C Min, TJ = 0°C, IO = 5 mA TJ = 25°C 7.5 14.5 17.5 V (8 VIN 18) 2.0 8 2.1 2.4 -0.6 (15 VIN 25) 2.0 18 1.5 2.4 -1.5 (18.5 VIN 28.5) 2.0 19 1.2 2.4 -1.8 V V m A A mV/°C 68 68 40 80 61 61 6 6.5 0.5 0.8 (7.5 VIN 20) 0.8 (8 VIN 25) 75 72 60 60 6 6.5 0.5 0.8 (14.8 VIN 27) 0.8 (15 VIN 30) 90 70 6 6.5 0.5 0.8 (17.9 VIN 30) 0.8 (17.9 VIN 30) mA mA mA mA V mA V µV dB dB 10 3 Conditions Min 4.9 4.8 5V 10V Typ Max 5 5.2 10 (7.5 VIN 20) 10 4 12 (8 VIN 12) 25 15 25 12 (7.5 VIN 20) 4 Min 11.5 5.1 11.75 12V 19V Typ Max 12 12.25 12.5 18 (14.8 VIN 27) 18 9 30 (16 VIN 22) 32 19 60 12 (14.5 VIN 27) 4 Min 14.7 14.4 15V 23V Typ 15 Max 15.3 15.6 22 (17.9 VIN 30) 22 10 30 (20 VIN 26) 35 21 75 (17.5 VIN 30) V V V mV V mV V mV mV V mV mV mV Units
(7.5 VIN 20)
(14.8 VIN 27)
(17.9 VIN 30)
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LM340/LM78MXX
LM140 Electrical Characteristics (Note 4)
-55°C TJ +150°C unless otherwise specified
Output Voltage Symbol VO Input Voltage (unless otherwise noted) Parameter Output Voltage Conditions TJ = 25°C, 5 mA IO 1A PD 15W, 5 mA IO 1A VMIN VIN VMAX VO Line Regulation IO = 500 mA TJ = 25°C VIN -55°C TJ +150°C VIN IO 1A TJ = 25°C VIN -55°C TJ +150°C VIN VO Load Regulation TJ = 25°C 5 mA IO 1.5A 250 mA IP 750 mA -55°C TJ +150°C, 5 mA IO 1A IQ IQ Quiescent Current Quiescent Current Change IO 1A 5 mA IO 1A TJ = 25°C, IO 1A VMIN VIN VMAX IO = 500 mA, -55°C TJ +150°C VMIN VIN VMAX VN Output Noise Voltage Ripple Rejection f = 120 Hz VMIN VIN VMAX RO Dropout Voltage Output Resistance Short-Circuit Current Peak Output Current Average TC of VOUT VIN Input Voltage Required to Maintain Line Regulation TJ = 25°C, IO = 1A f = 1 kHz TJ = 25°C TJ = 25°C 0°C TJ +150°C, IO = 5 mA TJ = 25°C, IO 1A 7.5 14.6 17.7 V TA = 25°C, 10 Hz f 100 kHz IO 1A, TJ = 25°C or IO 500 mA, -55°C TJ +150°C (8 VIN 18) 2.0 8 2.1 2.4 -0.6 (15 VIN 25) 2.0 18 1.5 2.4 -1.5 (18.5 VIN 28.5) 2.0 19 1.2 2.4 -1.8 V V m A A mV/°C 68 68 40 80 61 61 TJ = 25°C -55°C TJ +150°C 6 7 0.5 0.8 (8 VIN 20) 0.8 (8 VIN 25) 75 72 60 60 6 7 0.5 0.8 (15 VIN 27) 0.8 (15 VIN 30) 90 70 6 7 0.5 0.8 (18.5 VIN 30) 0.8 (18.5 VIN 30) mA mA mA mA V mA V µV dB dB 10 Min 4.8 4.75 3 5V 10V Typ 5 Max 5.2 5.25 50 50 (8 VIN 20) 50 (7.5 VIN 20) 25 (8 VIN 12) 50 25 50 12 Min 11.5 11.4 4 12V 19V Typ Max 12 12.5 12.6 120 120 (15 VIN 27) 120 (14.6 VIN 27) 60 (16 VIN 22) 120 60 120 12 Min 14.4 14.25 4 15V 23V Typ 15 Max 15.6 15.75 150 150 (18.5 VIN 30) 150 (17.7 VIN 30) 75 (20 VIN 26) 150 75 150 V V V mV V mV V mV V mV V mV mV mV Units
(8 VIN 20) (7 VIN 25)
(15.5 VIN 27) (14.5 VIN 30)
(18.5 VIN 30) (17.5 VIN 30)
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