AN7818F Просмотр технического описания (PDF) - Panasonic Corporation
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Компоненты Описание
производитель
AN7818F Datasheet PDF : 8 Pages
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s Characteristic Curve
PD –Ta (AN7800 Series)
16
14
(1)
12
(1) Infinite Heat Sink
(2) 5˚C/W Heat Sink
(3) 15˚C/W Heat Sink
(4) No Heat Sink
(2)
10
8
6
(3)
4
2
(4)
0
0
40
80
120
160
Ambient Temperature Ta (˚C)
Input Transient Response
20
AN7805
15
10
10
5
0
–10
–20
0
2
4
6
8
10
Time t (µs)
PD –Ta (AN7800F Series)
16
(1) Infinite Heat Sink
14
(2) 5˚C/W Heat Sink
(3) 15˚C/W Heat Sink
(4) No Heat Sink
12
10
(1)
8
6
(2)
4
(3)
2
(4)
0
0
40
80
120
160
Ambient Temperature Ta (˚C)
Load Transient Response
AN7805
2
1
0
1
0
–1
–2
0
10 20 30 40 50
Time t (µs)
VDIF (min.) –Tj
2.4
2.0
IO=1A
500mA
1.6
200mA
20mA
1.2
0.8
0mA
0.4
0
–40 0
40 80 120 160
Junction Temperature Tj (˚C)
Current Limiting Characteristic
7
VI=10V
6
Tj=25˚C
AN7805
5
4
3
2
1
0
0
0.6
1.2
0.8
2.4
Output Current IO (A)
s Basic Regulator Circuit
Input
CI
1
3
AN7800
AN7800F
2
Common
Output
CO
CI is set when the input line is long.
CO improves the transient response.
s Application Circuit
1) Current Boost Circuit
2) Adjustable Output Regulator
VI
Q1
3Ω
0.33µF
1
3
AN7800
AN7800F
2
IO
VO
0.1µF
VI
VO
1
3
AN7800
AN7800F
2
VO R2
Ibias
R1
VO = VO +
Ibias +
VO
R2
R1
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