LM7808CT National Semiconductor, LM7808CT Datasheet

IC, V REG +8.0V, 7808, TO-220-3

LM7808CT

Manufacturer Part Number
LM7808CT
Description
IC, V REG +8.0V, 7808, TO-220-3
Manufacturer
National Semiconductor
Datasheet

Specifications of LM7808CT

Output Voltage
8V
Dropout Voltage Vdo
2V
No. Of Pins
3
Voltage Regulator Case Style
TO-220
Operating Temperature Range
0°C To +125°C
Svhc
No SVHC (15-Dec-2010)
Operating Temperature Max
125°C
Output Voltage Fixed
8V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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© 2006 National Semiconductor Corporation
LM340/LM78XX Series
3-Terminal Positive Regulators
General Description
The
3-terminal positive voltage regulators employ internal
current-limiting, thermal shutdown and safe-area compensa-
tion, making them essentially indestructible. If adequate heat
sinking is provided, they can deliver over 1.0A output cur-
rent. 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 volt-
age regulators, these devices can be used with external
components to obtain adjustable output voltages and cur-
rents.
Considerable effort was expended to make the entire series
of regulators easy to use and minimize the number of exter-
nal components. It is not necessary to bypass the output,
although this does improve transient response. Input by-
passing is needed only if the regulator is located far from the
filter capacitor of the power supply.
Typical Applications
*Required if the regulator is located far from the power supply filter.
**Although no output capacitor is needed for stability, it does help transient
response. (If needed, use 0.1 µF, ceramic disc).
∆I
Q
= 1.3 mA over line and load changes.
LM140/LM340A/LM340/LM78XXC
Fixed Output Regulator
Current Regulator
00778103
DS007781
00778101
monolithic
The 5V, 12V, and 15V regulator options are available in the
steel TO-3 power package. The LM340A/LM340/LM78XXC
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
n Line regulation of 0.01% of V
n Load regulation of 0.3% of V
n Internal thermal overload protection
n Internal short-circuit current limit
n Output transistor safe area protection
n P
V
load regulation (L
OUT
over the temperature range (LM340A)
(LM340A)
Comparison between SOT-223 and D-Pak (TO-252)
+
= 5V + (5V/R1 + I
Product Enhancement tested
r
Adjustable Output Regulator
) ≈ [(R1 + R2)/R1] (L
Q
) R2 5V/R1
Packages
Scale 1:1
>
r
OUT
3 I
±
OUT
of LM340-5).
2% at T
Q
,
/A (LM340A)
/V of ∆V
00778102
j
00778138
= 25˚C and
IN
www.national.com
at 1A load
July 2006
±
4%

Related parts for LM7808CT

LM7808CT Summary of contents

Page 1

... Current Regulator ∆I = 1.3 mA over line and load changes. Q © 2006 National Semiconductor Corporation The 5V, 12V, and 15V regulator options are available in the steel TO-3 power package. The LM340A/LM340/LM78XXC monolithic series is available in the TO-220 plastic power package, and the LM340-5 ...

Page 2

... LM340K-5.0 LM340K 5.0 7805P+ LM340K-12 LM340K 12 7812P+ LM340K-15 LM340K 15 7815P+ LM340AT-5.0 LM340AT 5.0 P+ LM340T-5.0 LM340T5 7805 P+ LM340T-12 LM340T12 7812 P+ LM340T-15 LM340T15 7815 P+ LM7808CT LM7808CT LM340S-5.0 LM340S-5.0 P+ LM340SX-5.0 LM340S-12 LM340S-12 P+ LM340SX-12 LM340AS-5.0 LM340AS-5.0 P+ LM340ASX-5.0 LM340MP-5.0 N00A LM340MPX-5.0 LM140KG-5 MD8 LM140KG-12 MD8 LM140KG-15 MD8 LM340-5 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 5) DC Input Voltage Internal Power Dissipation (Note 2) Maximum Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10 sec.) TO-3 Package (K) LM340A Electrical Characteristics = 1A, 0˚ ...

Page 4

LM340A Electrical Characteristics = 1A, 0˚C ≤ T ≤ + 125˚C (LM340A) unless otherwise specified (Note 4) I OUT J Output Voltage Symbol Input Voltage (unless otherwise noted) Parameter Peak Output T = 25˚C J Current Average TC of Min, ...

Page 5

LM140 Electrical Characteristics −55˚C ≤ T ≤ +150˚C unless otherwise specified J Output Voltage Symbol Input Voltage (unless otherwise noted) Parameter Ripple Rejection f = 120 Hz ≤ MIN R Dropout Voltage T = 25˚ ...

Page 6

LM340 Electrical Characteristics 0˚C ≤ T ≤ +125˚C unless otherwise specified J Output Voltage Symbol Input Voltage (unless otherwise noted) Parameter V MIN ≤ 500 mA, 0˚C ≤ MIN = 25˚ ≤ f ≤ ...

Page 7

LM7808C Electrical Characteristics 0˚C ≤ T ≤ +150˚ 14V 500 mA Symbol Parameter V Output Voltage O ∆V Line Regulation O ∆V Load Regulation O V Output Voltage O I Quiescent Current ...

Page 8

Typical Performance Characteristics Maximum Average Power Dissipation Maximum Power Dissipation (TO-263) (See Note 2) Ripple Rejection www.national.com Maximum Average Power Dissipation 00778122 Output Voltage (Normalized 00778124 Note: Shaded area refers to LM340A/LM340, LM7805C, LM7812C and LM7815C. ...

Page 9

Typical Performance Characteristics Output Impedance Quiescent Current Note: Shaded area refers to LM340A/LM340, LM7805C, LM7812C and LM7815C. Dropout Voltage Note: Shaded area refers to LM340A/LM340, LM7805C, LM7812C and LM7815C. (Continued) Dropout Characteristics 00778128 Peak Output Current 00778130 00778132 9 00778129 ...

Page 10

Line Regulation 140AK-5. 1A, T OUT Equivalent Schematic www.national.com = 25˚C A 00778105 10 Line Regulation 140AK-5. 10V 25˚ 00778107 00778106 ...

Page 11

Application Hints The LM340/LM78XX series is designed with thermal protec- tion, output short-circuit protection and output transistor safe area protection. However, as with any IC regulator, it be- comes necessary to take precautions to assure that the regulator is not ...

Page 12

Application Hints (Continued) HEATSINKING TO-263 AND SOT-223 PACKAGE PARTS Both the TO-263 (“S”) and SOT-223 (“MP”) packages use a copper plane on the PCB and the PCB itself as a heatsink. To optimize the heat sinking ability of the plane ...

Page 13

Typical Applications Note: Bypass capacitors are recommended for optimum stability and transient response, and should be located as close as possible to the regulator. Fixed Output Regulator 00778113 High Input Voltage Circuits 00778114 High Current Voltage Regulator 13 00778115 00778116 ...

Page 14

Typical Applications www.national.com (Continued) High Output Current, Short Circuit Protected Positive and Negative Regulator 14 00778117 00778118 ...

Page 15

Physical Dimensions inches (millimeters) unless otherwise noted TO-3 Metal Can Package (K) NS Package Number K02A TO-263 Surface-Mount Package (S) NS Package Number TS3B 15 www.national.com ...

Page 16

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) TO-220 Power Package (T) NS Package Number T03B 3-Lead SOT-223 Package NS Package Number MP04A 16 ...

Page 17

... BANNED SUBSTANCE COMPLIANCE National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C2) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/quality/green. ...

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