AN7800R 查看數據表（PDF） - Panasonic Corporation
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AN7800R Datasheet PDF : 6 Pages
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s Characteristic Curve
PD –Ta
16
(1) Infinite Heat Sink
14
(2) 5˚C/W Heat Sink
(3) 15˚C/W Heat Sink
(4) Without Heat Sink
12
(1)
10
8
(2)
6
(3)
4
(4)
2
0
0
40
80
120
160
Ambient Temperature Ta (˚C)
VO (Reset) – IO
1000
800
VI=20V
CI=0.33µF
CO=0.1µF
Tj=25˚C
600
VI=10V
400
VI=30V
200
VI=7V
0
0.1
1
10
100 1000
Output Current IO (mA)
II (Reset) – Tj
1.0
0.8
0.6
0.4
0.2
0
–40 0
40 80 120 160
Junction Temperature Tj (˚C)
s Basic Regulator Circuit
Input
CI
1
3
AN7800R
AN78M00R
4
2
* 7406etc.
Reset
Output
CO
* For TTL, an open collector type inverter, buffer, gate etc.
can be used.
Beware of the breakdown of TTL, as the reset pin bears voltage
higher than the output voltage VO by 1—2V.
CI is set when the input line is long.
CO improves the temperature response.
s Application Circuit
(1) Soft Start Circuit
Input
0.33µF
1
3
AN7800R
AN78M00R
4
2
Output
1kΩ
0.1µF
C
U Control of Output Voltage Rise Time
10
1
0.1
1
10
100
Capacity C (µF)
(2) Several Output Reset Circuits
Input
1
3
AN7800R
AN78M00R 1kΩ
0.33µF
4
R
2
Q
Output
0.1µF
Input
0.33µF
1
3
AN7800R
AN78M00R
4
2
SW
1kΩ R
0.1µF
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