参数资料
| 型号： | MAX1720EUT |
| 厂商： | ON Semiconductor |
| 文件页数： | 15/18页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHD CAP INV ADJ 6TSOP |
| 产品变化通告： | LTB Notification 03/Jan/2008 |
| 标准包装： | 3,000 |
| 类型： | 切换式电容器（充电泵），反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | -1.5 V ~ -5.5 V，3 V ~ 11 V |
| 输入电压： | 1.5 V ~ 5.5 V |
| 频率 - 开关： | 12kHz |
| 电流 - 输出： | 50mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74，SOT-457 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 6-TSOP |
| 其它名称： | MAX1720EUTOS |
MAX1720
The MAX1720 can be configured to produce a positive output voltage doubler with current capability in excess of 500 mA.
This is accomplished with the addition of two external switch transistors and two Schottky diodes. The output voltage is
approximately equal to 2V 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 is shown below. Note that the output resistance is reduced to 1.9 W .
8.8
8.4
8.0
7.6
7.2
V in = 5.0 V
R out = 1.9 W
T A = 25 ° C
6.8
0
0.1
0.2
0.3
0.4
0.5
0.6
I out , OUTPUT CURRENT (A)
Figure 43. Positive Doubler with Current Boosted Load Regulation, Output Voltage vs. Output Current
R 1
10 k
50
1
6
Q 2
+
R 2
V out
V in
+
2
OSC
5
50
Q 1
C 1
+
C 2
C 3
Capacitors = 220 m F
3
4
Q 1 = PZT751
Q 2 = PZT651
Figure 44. Line and Load Regulated Positive Output Voltage Doubler with High Current Capability
This converter is a combination of Figures 42 and the shunt regulator to close the loop. In this case the anode of the regulator
is connected to ground. This convert provides a line and load regulated output of 7.6 V at up to 300 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 open loop configuration is the dashed line and the closed
loop is the solid line. The performance characteristics are shown below.
8.8
8.4
8.0
7.6
V in = 5.0 V
R out = 1.9 W Open Loop
R out = 0.5 W Closed Loop
R 1 = 10 k
R 2 = 51.3 k W
T A = 25 ° C
8.0
7.0
6.0
5.0
4.0
7.2
3.0
2.0
I out = 100 mA
R 1 = 10 k
R 2 = 51.3 k W
T A = 25 ° C
6.8
0
0.1
0.2
0.3
0.4
0.5
0.6
1.0
1.0
2.0
3.0
4.0
5.0
6.0
I out , OUTPUT CURRENT (A)
Figure 45. Current Boosted Close Loop Load
Regulation, Output Voltage vs. Output Current
http://onsemi.com
15
V in , INPUT VOLTGE (V)
Figure 46. Current Boosted Close Loop Line
Regulation, Output Voltage vs. Input Voltage
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相关代理商/技术参数 |
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|---|---|
| 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:电荷泵 Switched-Cap Voltage Inverter w/Shutdown RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX1720EUTG | 功能描述:电荷泵 Switched Cap Voltage Inverter w/Shutdown RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX1720EUT-T | 功能描述:电荷泵 Switched-Cap Voltage Inverter w/Shutdown RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX1721EUT | 制造商:Maxim Integrated Products 功能描述:VOLTAGE INVERTER - Rail/Tube |
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