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參數(shù)資料
| 型號： | BA03ST |
| 英文描述： | VOLT REGULATOR|FIXED|+3V|BIPOLAR|SIP|5PIN|PLASTIC |
| 中文描述： | 電壓調(diào)節(jié)器|定額| 3V的|雙極|園區(qū)| 5PIN |塑料 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 244K |
| 代理商： | BA03ST |
25
Standard ICs
BA
ST series
Operation notes
(1)
Operating power supply voltage
When operating within the normal voltage range and
within the ambient operating temperature range, most
circuit functions are guaranteed. The rated values cannot
be guaranteed for the electrical characteristics, but there
are no sudden changes of the characteristics within
these ranges.
(2)
Power dissipation
Heat attenuation characteristics are noted on a separate
page and can be used as a guide in judging power dis-
sipation.
If these ICs are used in such a way that the allowable
power dissipation level is exceeded, an increase in the
chip temperature could cause a reduction in the current
capability or could otherwise adversely affect the perfor-
mance of the IC. Make sure a sufficient margin is allowed
so that the allowable power dissipation value is not ex-
ceeded.
(3)
Output oscillation prevention and bypass capacitor
Be sure to connect a capacitor between the output pin
and GND to prevent oscillation. Since fluctuations in the
valve of the capacitor due to temperature changes may
cause oscillations, a tantalum electrolytic capacitor with
a small internal series resistance (ESR) is recom-
mended.
A 22
μ
F capacitor is recommended; however, be aware
that if an extremely large capacitance is used (1000
μ
F
or greater), then oscillations may occur at low frequen-
cies. Therefore, be sure to perform the appropriate verifi-
cations before selecting the capacitor.
Also, we recommend connecting a 0.33
μ
F bypass ca-
pacitor as close as possible between the input pin and
GND.
(4) Current overload protection circuit
A current overload protection circuit is built into the out-
puts, to prevent IC destruction if the load is shorted.
This protection circuit limits the current in the shape of a
’7’. It is designed with a high margin, so that even if a large
current suddenly flows through the large capacitor in the
IC, the current is restricted and latching is prevented.
However, these protection circuits are only good for pre-
venting damage from sudden accidents. The design
should take this into consideration, so that the protection
circuit is not made to operate continuously (for instance,
clamping at an output of 1V
F
or greater; below 1V
F
, the
short mode circuit operates). Note that the capacitor has
negative temperature characteristics, and the design
should take this into consideration.
(5)
Thermal overload circuit
A built-in thermal overload circuit prevents damage from
overheating. When the thermal circuit is activated, the
various outputs are in the OFF state. When the tempera-
ture drops back to a constant level, the circuit is restored.
(6)
Internal circuits could be damaged if there are
modes in which the electric potential of the application’s
input (V
CC
) and GND are the opposite of the electric po-
tential of the various outputs. Use of a diode or other such
bypass path is recommended.
(7)
Although the manufacture of this product includes
rigorous quality assurance procedures, the product may
be damaged if absolute maximum ratings for voltage or
operating temperature are exceeded. If damage has oc-
curred, special modes (such as short circuit mode or
open circuit mode) cannot be specified. If it is possible
that such special modes may be needed, please consid-
er using a fuse or some other mechanical safety mea-
sure.
(8)
When used within a strong magnetic field, be aware
that there is a slight possibility of malfunction.
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