|
|
PDF LM7800C Data sheet ( Hoja de datos )
| Número de pieza | LM7800C | |
| Descripción | Series 3-Terminal Positive Regulators | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM7800C (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
May 1999
LM140/LM340A/LM340/LM7800C
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 appli-
cations 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 ob-
tain adjustable output voltages and currents.
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, al-
though this does improve transient response. Input bypass-
ing 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 (LM140A/LM340A)
n Line regulation of 0.01% of VOUT/V of ∆VIN at 1A load
(LM140A/LM340A)
n Load regulation of 0.3% of VOUT/A (LM140A/LM340A)
n Internal thermal overload protection
n Internal short-circuit current limit
n Output transistor safe area protection
n P+ Product Enhancement tested
Device
Output
Voltages
LM140
5, 12,
15
LM340A/LM340 5, 12,
15
LM7800C
5, 8, 12,
15
Packages
TO-3 (K)
TO-3 (K), TO-220 (T),
SOT-223 (MP), TO-263 (S)
(5V and 12V only)
TO-220 (T)
Typical Applications
Fixed Output Regulator
Adjustable Output Regulator
DS007781-1
*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).
Current Regulator
DS007781-2
VOUT = 5V + (5V/R1 + IQ) R2 5V/R1 > 3 IQ,
load regulation (Lr) ≈ [(R1 + R2)/R1] (Lr of LM340-5).
Comparison between SOT-223 and D-Pak (TO-252)
Packages
DS007781-3
∆IQ = 1.3 mA over line and load changes.
DS007781-38
Scale 1:1
© 1999 National Semiconductor Corporation DS007781
www.national.com
1 page  
LM7808C
Electrical Characteristics
0˚C ≤ TJ ≤ +150˚C, VI = 14V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF, unless otherwise specified
Symbol
Parameter
Conditions (Note 6)
LM7808C
Min Typ Max
VO Output Voltage
∆VO Line Regulation
∆VO Load Regulation
TJ = 25˚C
TJ = 25˚C
TJ = 25˚C
7.7 8.0 8.3
10.5V ≤ VI ≤ 25V
11.0V ≤ VI ≤ 17V
5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750
mA
6.0 160
2.0 80
12 160
4.0 80
VO Output Voltage
IQ Quiescent
Current
11.5V ≤ VI ≤ 23V, 5.0 mA ≤ IO ≤ 1.0A, P ≤ 15W
TJ = 25˚C
7.6 8.4
4.3 8.0
∆IQ Quiescent
With Line 11.5V ≤ VI ≤ 25V
Current Change
With
Load
5.0 mA ≤ IO ≤ 1.0A
1.0
0.5
VN
∆VI/∆VO
VDO
RO
IOS
IPK
∆VO/∆T
Noise
Ripple Rejection
Dropout Voltage
Output Resistance
Output Short Circuit Current
Peak Output Current
Average Temperature
Coefficient of Output Voltage
TA = 25˚C, 10 Hz ≤ f ≤ 100 kHz
f = 120 Hz, IO = 350 mA, TJ = 25˚C
IO = 1.0A, TJ = 25˚C
f = 1.0 kHz
TJ = 25˚C, VI = 35V
TJ = 25˚C
IO = 5.0 mA
52
56 72
2.0
16
0.45
2.2
0.8
Units
V
mV
mV
V
mA
mA
µV
dB
V
mΩ
A
A
mV/˚C
Note 6: All characteristics are measured with a 0.22 µF capacitor from input to ground and a 0.1 µF capacitor from output to ground. All characteristics except noise
voltage and ripple rejection ratio are measured using pulse techniques (tw ≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature
must be taken into account separately.
Typical Performance Characteristics
Maximum Average Power
Dissipation
Maximum Average Power
Dissipation
Maximum Power
Dissipation (TO-263)
(See Note 2)
DS007781-22
DS007781-23
DS007781-24
5 www.national.com
5 Page 
Connection Diagrams and Ordering Information
TO-3 Metal Can Package (K)
TO-220 Power Package (T)
DS007781-11
Bottom View
Steel Package Order Numbers:
LM140K-5.0 LM140K-12 LM140K-15
LM340K-12 LM340K-15
LM340K-5.0
See Package Number K02A
LM140K-5.0/883 LM140K-12/883 LM140K-15/883
See Package Number K02C
DS007781-12
Top View
Plastic Package Order Numbers:
LM340AT-5.0 LM340T-5.0
LM340T-12 LM340T-15
LM7805CT LM7812CT
LM7815CT LM7808CT
See Package Number T03B
TO-39 Metal Can Package (H)
DS007781-19
Top View
Metal Can Order Numbers†:
LM140H-5.0/883 LM140H-6.0/883
LM140H-8.0/883 LM140H-12/883
LM140H-15/883 LM140H-24/883
See Package Number H03A
TO-263 Surface-Mount Package (S)
DS007781-20
Top View
DS007781-21
Side View
Surface-Mount Package Order Numbers:
LM340S-5.0 LM340S-12
See Package Number TS3B
3-Lead SOT-223
(Front View)
Order Number LM340MP-5.0
Package Marked NO0A
See Package Number MA04A
DS007781-43
†The specifications for the LM140H/883 devices are not contained in this datasheet. If specifications for these devices
are required, contact the National Semiconductor Sales Office/Distributors.
11 www.national.com
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet LM7800C.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM7800-220M | POSITIVE VOLTAGE REGULATOR TO 220 M |  Seme LAB |
| LM7800-SMD | POSITIVE VOLTAGE REGULATOR TO 220 M | Seme LAB |
| LM7800C | Series 3-Terminal Positive Regulators | National Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |