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PDF LM2930 Data sheet ( Hoja de datos )
| Número de pieza | LM2930 | |
| Descripción | 3-Terminal Positive Regulator | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LM2930 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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April 1998
LM2930
3-Terminal Positive Regulator
General Description
The LM2930 3-terminal positive regulator features an ability
to source 150 mA of output current with an input-output dif-
ferential of 0.6V or less. Efficient use of low input voltages
obtained, for example, from an automotive battery during
cold crank conditions, allows 5V circuitry to be properly pow-
ered with supply voltages as low as 5.6V. Familiar regulator
features such as current limit and thermal overload protec-
tion are also provided.
Designed originally for automotive applications, the LM2930
and all regulated circuitry are protected from reverse battery
installations or 2 battery jumps. During line transients, such
as a load dump (40V) when the input voltage to the regulator
can momentarily exceed the specified maximum operating
voltage, the regulator will automatically shut down to protect
both internal circuits and the load. The LM2930 cannot be
harmed by temporary mirror-image insertion.
Fixed outputs of 5V and 8V are available in the plastic
TO-220 and TO-263 power packages.
Features
n Input-output differential less than 0.6V
n Output current in excess of 150 mA
n Reverse battery protection
n 40V load dump protection
n Internal short circuit current limit
n Internal thermal overload protection
n Mirror-image insertion protection
n P+ Product Enhancement tested
Voltage Range
LM2930T-5.0:
LM2930T-8.0:
LM2930S-5.0:
LM2930S-8.0:
Connection Diagrams
(TO-220)
Plastic Package
(TO-263)
Plastic Surface-Mount Package
5V
8V
5V
8V
DS005539-1
Front View
Order Number LM2930T-5.0 or LM2930T-8.0
See NS Package Number T03B
Top View
DS005539-7
DS005539-8
Side View
Order Number LM2930S-5.0 or LM2930S-8.0
See NS Package Number TS3B
© 1998 National Semiconductor Corporation DS005539
www.national.com
1 page  
Typical Performance Characteristics (Continued)
Peak Output Current
Quiescent Current
Quiescent Current
Quiescent Current
DS005539-23
Ripple Rejection
DS005539-24
Ripple Rejection
DS005539-25
DS005539-26
Definition of Terms
Dropout Voltage: The input-output voltage differential at
which the circuit ceases to regulate against further reduction
in input voltage. Measured when the output voltage has
dropped 100 mV from the nominal value obtained at 14V in-
put, dropout voltage is dependent upon load current and
junction temperature.
Input Voltage: The DC voltage applied to the input terminals
with respect to ground.
Input-Output Differential: The voltage difference between
the unregulated input voltage and the regulated output volt-
age for which the regulator will operate.
Line Regulation: The change in output voltage for a change
in the input voltage. The measurement is made under condi-
tions of low dissipation or by using pulse techniques such
that the average chip temperature is not significantly af-
fected.
Load Regulation: The change in output voltage for a
change in load current at constant chip temperature.
Long Term Stability: Output voltage stability under acceler-
ated life-test conditions after 1000 hours with maximum
rated voltage and junction temperature.
Output Noise Voltage: The rms AC voltage at the output,
with constant load and no input ripple, measured over a
specified frequency range.
DS005539-27
DS005539-28
Quiescent Current: That part of the positive input current
that does not contribute to the positive load current. The
regulator ground lead current.
Ripple Rejection: The ratio of the peak-to-peak input ripple
voltage to the peak-to-peak output ripple voltage.
Temperature Stability of VO: The percentage change in
output voltage for a thermal variation from room temperature
to either temperature extreme.
Maximum Power
Dissipation (TO-220)
DS005539-6
5 www.national.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LM2930.PDF ] | |
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