参数资料
型号: MAX829EUKG
厂商: ON Semiconductor
文件页数: 14/17页
文件大小: 0K
描述: IC REG SWITCHD CAP DBL INV 5TSOP
产品变化通告: Product Obsolescence 01/Jul/2009
标准包装: 1
类型: 切换式电容器(充电泵),倍增器,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: 19kHz ~ 54kHz
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: 6-TSOP(0.059",1.50mm 宽)5 引线
供应商设备封装: 5-TSOP
MAX828, MAX829
Curve
A
B
C
D
V in (V)
5.0
3.0
5.0
3.0
R out ( W )
13.3
17.3
14.4
17.3
Q 2
C 1
1
OSC
5
Q 1
+
+
C 2
?V out
V in
+
2
C 3
3
4
C 1 = C 2 = 470 m F
C 3 = 220 m F
Q 1 = PZT751
Q 2 = PZT651
?V out = V in ?V BE(Q1) ? V BE(Q2) ?2 V F
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.
?2.2
?2.4
?2.0
?2.2
?2.4
?2.6
?2.6
?2.8
?2.8
?3.0
V in = 5.0 V
R out = 0.9 W
T A = 25 ° C
?3.0
V in = 5.0 V
R out = 1.0 W
T A = 25 ° C
?3.2
0
0.1
0.2
0.3
0.4
0.5
0.6
?3.2
0
0.1
0.2
0.3
0.4
0.5
0.6
I out , OUTPUT CURRENT (A)
Figure 46. Current Boosted Load Regulation,
Output Voltage vs. Output Current MAX828
http://onsemi.com
14
I out , OUTPUT CURRENT (A)
Figure 47. Current Boosted Load Regulation,
Output Voltage vs. Output Current MAX829
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