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參數(shù)資料
| 型號： | MAX829SNTR |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Switched Capacitor Voltage Converters |
| 中文描述： | SWITCHED CAPACITOR CONVERTER, 54.3 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | PLASTIC, SOT-23, 5 PIN |
| 文件頁數(shù)： | 14/18頁 |
| 文件大?。?/td> | 158K |
| 代理商： | MAX829SNTR |
MAX828, MAX829
http://onsemi.com
14
0
1.0
2.0
40
20
3.0
4.0
5.0
80
100
I
out
, OUTPUT CURRENT (mA)
V
o
,
60
Figure 43. Parallel Load Regulation, Output
Voltage vs. Output Current MAX828
A
B
A
5.0
B
3.0
Curve
V
in
(V)
13.3
17.3
R
out
( )
0
1.0
2.0
40
20
3.0
4.0
5.0
80
100
I
out
, OUTPUT CURRENT (mA)
V
o
,
60
Figure 44. Parallel Load Regulation, Output
Voltage vs. Output Current MAX829
C
D
C
5.0
D
3.0
14.4
17.3
T
A
= 25
°
C
T
A
= 25
°
C
+
5
4
2
3
1
OSC
+
V
in
V
out
Q
1
C
3
V
out
= V
in
V
BE(Q1)
V
BE(Q2)
2 V
F
+
C
2
Q
2
C
1
C
1
= C
2
= 470 F
C
3
= 220 F
Q
1
= PZT751
Q
2
= PZT651
Figure 45. External Switch for Increased Negative Output Current
The output current capability of the MAX828 and MAX829 can be extended beyond 600 mA with the addition of two
external switch transistors and two Schottky diodes. The output voltage is approximately equal to V
in
minus the sum of the
base emitter drops of both transistors and the forward voltage of both diodes. The performance characteristics for the converter
are shown below. Note that the output resistance is reduced to 0.9 and 1.0 ohms for the 828 and 829 respectively.
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