an77l00 Panasonic Corporation of North America, an77l00 Datasheet - Page 8

• Manufacturer Part Number: an77l00
• Description: 3-pin Low Power Loss Voltage Regulato 100ma Type
• Manufacturer: Panasonic Corporation of North America

AN77L00/AN77L00M Series
8
1. Input Short-Circuit Protection Circuit
of the AN8000 series), when DC input pin3 is short-
circuited with GND w in the normal operation condition,
the potential of output pinq becomes higher than that of
DC input pin and the electric charges which is charged in
output capacitor C
breakage of elements.
as shown in the right figure (the dotted line). However, for
the AN77L00/M series, since the protection circuit, which
protects the elements from the discharging current, is
incorporated in the internal circuit, the protection diode is
not required.
2. Capacitor for External Compensation
required in the output side and it should be added as near
as possible to output pin1 and GND 2. When it is used
under low temperature, oscillation may occur due to the
decrease of the aluminum electrolytic capacitor and
increase of ESR.
capacitor or aluminum electrolytic capacitor whose serial-
connected resistance equivalent with that of output
capacitor C
recommended range specified in the right.
For the AN77L00/M, it is recommended that the tantalum
For the conventional Matsushita 3-pin regulators (such as
In the above case, the common silicon diode is connected
Precautions on Use
In order to secure the safety, the capacitor of 10 F is
Note) SM to printed board (glass epoxy board of 20 20 1.7mm with copper film of 1cm
[Power Dissipation (TO-92 Package)]
O
has temperature characteristics within the
1.0
0.5
0
0
O
flows in the input side, resulting in the
Ambient Temperature Ta (˚C)
25
AN77L00 series
50
P
D
—Ta
75
Single Unit
R
P
D
thj
85
=658mW (25˚C)
– a=190˚C/W
100
125
150
[Power Dissipation (TO-243 Package)]
1.0
0.5
V
0
I
0
Ambient Temperature Ta (˚C)
AN77L00M Series
25
C
0.33 F
I
50
40
30
20
10
0
50
P
Pin number in
Pin number in ( ) is for the AN77L00 series.
D
3
—Ta
75
(1)
20
Output Current I
85
Recommended Range
100
40
2
125
is for the AN77L00M series.
(3)
Voltage Regulators
150
60
(2)
2
O
or more)
Not required
(mA)
1
80
100
+
–
C
10 F
V
O
O