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參數(shù)資料
| 型號(hào)： | MAX1720 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Switched Capacitor Voltage Inverter with Shutdown(帶關(guān)斷功能的開(kāi)關(guān)電容電壓反相器) |
| 中文描述： | SOT23封裝、開(kāi)關(guān)電容電壓反相器，帶有關(guān)斷 |
| 文件頁(yè)數(shù)： | 12/18頁(yè) |
| 文件大?。?/td> | 182K |
| 代理商： | MAX1720 |
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MAX1720
http://onsemi.com
12
An adjustable shunt regulator can be used with the shutdown input to give excellent closed loop regulation performance. The
shunt regulator acts as a comparator with a precise input offset voltage which significantly reduces the converter’s output
resistance and dramatically enhances the line and load regulation. For closed loop operation, the desired regulated output
voltage must be lower in magnitude than V
in
. The output will regulate at a level of V
ref
(R
2
/R
1
+ 1). The adjustable shunt
regulator can be from either the TLV431 or TL431 families. The comparator offset or reference voltage is 1.25 V or 2.5 V
respectively. The performance characteristics for the converter are shown below. Note that the dashed curve sections represent
the converter’s open loop performance.
2.0
3.0
1.0
4.0
5.0
I
out
, OUTPUT CURRENT (mA)
Figure 33. Load Regulation, Output Voltage vs.
Output Current
V
o
,
0
30
70
10
20
40
50
60
A
B
T
A
= 25
°
C
A
3.0
5.0 k
B
5.0
20 k
Curve
V
in
(V)
R
2
( )
1.8
3.6
V
out
(V)
10 k
10 k
R
1
( )
2.0
3.0
1.0
4.0
1.0
3.0
2.0
4.0
5.0
6.0
0
V
in
, INPUT VOLTAGE (V)
V
o
,
Figure 34. Line Regulation, Output Voltage vs.
Input Current
I
out
= 25 mA
R
1
= 10 k
R
2
= 20 k
T
A
= 25
°
C
+
6
4
2
3
1
OSC
Capacitors = 10 F
V
in
5
6
4
2
3
1
OSC
+
5
V
out
+
+
Figure 35. Paralleling Devices for Increased Negative Output Current
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1720EUT | 功能描述:電荷泵 Switched Cap Voltage RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX1720EUT+ | 制造商:Maxim Integrated Products 功能描述:CHG PUMP INV -1.25V TO -5.5V 25MA 6PIN SOT-23 - Rail/Tube |
| MAX1720EUT+T | 功能描述:電荷泵 Switched-Cap Voltage Inverter w/Shutdown RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX1720EUTG | 功能描述:電荷泵 Switched Cap Voltage Inverter w/Shutdown RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX1720EUT-T | 功能描述:電荷泵 Switched-Cap Voltage Inverter w/Shutdown RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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