参数资料
型号: NCP1729SN35T1
厂商: ON Semiconductor
文件页数: 8/22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: 1
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: -1.15 V ~ -5.5 V,2.3 V ~ 11 V
输入电压: 1.15 V ~ 5.5 V
频率 - 开关: 35kHz
电流 - 输出: 50mA
同步整流器:
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: 剪切带 (CT)
供应商设备封装: 6-TSOP
其它名称: NCP1729SN35T1OSCT
NCP1729
V in
?V out
1
6
1
6
+
OSC
+
OSC
+
+
2
3
5
4
+
2
3
5
4
Capacitors = 3.3 m F
Figure 20. Cascaded Devices for Increased Negative Output Voltage
Two or more devices can be cascaded for increased output voltage. Under light load conditions, the output voltage is
approximately equal to ?V in times the number of stages. The converter output resistance increases dramatically with each
additional stage. This is due to a reduction of input voltage to each successive stage as the converter output is loaded. Note that
the ground connection for each successive stage must connect to the negative output of the previous stage. The performance
characteristics for a converter consisting of two cascaded devices are shown below.
?1.0
?2.0
?3.0
?4.0
?5.0
?6.0
B
A
?7.0
?8.0
Curve
A
V in (V)
5.0
R out ( W )
145
?9.0
T A = 25 ° C
B
3.0
180
?10.0
0
10
20
30
40
I out , OUTPUT CURRENT (mA)
Figure 21. Cascade Load Regulation, Output
Voltage vs. Output Current
http://onsemi.com
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