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): 14/18頁(yè)
文件大?。?/td> 182K
代理商: MAX1720
MAX1720
http://onsemi.com
14
Figure 39. Line and Load Regulated Negative Output Voltage
with High Current Capability
+
6
4
2
3
1
OSC
+
V
in
5
V
out
Q
1
C
3
+
C
2
Q
2
C
1
C
1
= C
2
= 470 F
C
3
= 220 F
Q
1
= PZT751
Q
2
= PZT651
R
1
R
2
10 k
This converter is a combination of Figures 37 and 32. It provides a line and load regulated output of 2.36 V at up to 450 mA
with an input voltage of 5.0 V. The output will regulate at a level of V
ref
(R
2
/R
1
+ 1). The performance characteristics are shown
below. Note, the dashed line is the open loop and the solid line is the closed loop performance.
2.6
I
out
, OUTPUT CURRENT (A)
Figure 40. Current Boosted Load Regulation,
Output Voltage vs. Output Current
V
o
,
0
0.4
0.5
0.3
0.2
0.1
0.6
3.2
2.4
2.8
2.2
V
in
= 5.0 V
R
out
= 0.9
R
1
= 10 k
R
2
= 9.0 k
T
A
= 25
°
C
3.0
1.4
V
o
,
3.0
5.0
5.5
4.5
4.0
3.5
6.0
2.4
1.2
1.6
1.0
1.8
V
in
, INPUT VOLTAGE (V)
2.0
2.2
Figure 41. Current Boosted Line Regulation,
Output Voltage vs. Input Voltage
I
out
= 100 mA
R
1
= 10 k
R
2
= 9 k
T
A
= 25
°
C
Figure 42. Positive Output Voltage Doubler with High Current Capability
+
6
4
2
3
1
OSC
+
V
in
5
V
out
Q
1
C
3
+
C
2
Q
2
C
1
Capacitors = 220 F
Q
1
= PZT751
Q
2
= PZT651
50
50
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