参数资料
| 型号： | MAX829EUKG |
| 厂商： | ON Semiconductor |
| 文件页数： | 7/17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： | 无 |
| 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
Capacitor Selection
In order to maintain the lowest output resistance and
output ripple voltage, it is recommended that low ESR
capacitors be used. Additionally, larger values of C 1 will
lower the output resistance and larger values of C 2 will
reduce output voltage ripple. (See Equation 3).
Table 1 shows various values of C 1 , C 2 and C 3 with the
corresponding output resistance values at 25 ° C. Table 2
shows the output voltage ripple for various values of C 1 , C 2
and C 3 . The data in Tables 1 and 2 was measured not
calculated.
Table 1. Output Resistance vs. Capacitance
(C 1 = C 2 = C 3 ), V in = 4.75 V and V out = ?4.0 V
C 1 = C 2 = C 3 MAX828 R out MAX829 R out
( m F) ( W ) ( W )
Voltage Inverter
The most common application for a charge pump is the
voltage inverter (Figure 20). This application uses two or
three external capacitors. The capacitors C 1 (pump
capacitor) and C 2 (output capacitor) are required. The input
bypass capacitor C 3 , may be necessary depending on the
application. The output is equal to ?V in plus any voltage
drops due to loading. Refer to Tables 1 and 2 for capacitor
selection. The test setup used for the majority of the
characterization is shown in Figure 20.
Layout Considerations
As with any switching power supply circuit, good layout
practice is recommended. Mount components as close
together as possible to minimize stray inductance and
capacitance. Also use a large ground plane to minimize
noise leakage into other circuitry.
0.7
127.2
55.7
1.4
3.3
7.3
10
24
50
67.7
36
26.7
25.9
24.3
24
36.8
26.0
24.9
25.1
25.2
24
Capacitor Resources
Selecting the proper type of capacitor can reduce
switching loss. Low ESR capacitors are recommended. The
MAX828 and MAX829 were characterized using the
capacitors listed in Table 3. This list identifies low ESR
capacitors for the voltage inverter application.
Table 3. Capacitor Types
Manufacturer/Contact
Part Types/Series
Table 2. Output Voltage Ripple vs. Capacitance
(C 1 = C 2 = C 3 ), V in = 4.75 V and V out = ?4.0 V
AVX
843?448?9411
www.avxcorp.com
TPS
C 1 = C 2 = C 3
( m F)
0.7
1.4
3.3
7.3
10
24
50
MAX828 Ripple
(mV)
377.5
360.5
262
155
126
55.1
36.6
MAX829 Ripple
(mV)
320
234
121
62.1
51.25
25.2
27.85
Cornell Dubilier
508?996?8561
www.cornell?dubilier.com
Sanyo/Os?con
619?661?6835
www.sanyovideo.com/oscon.htm
Vishay
603?224?1961
www.vishay.com
ESRD
SN
SVP
593D
594
Input Supply Bypassing
?V out
+
1
OSC
5
The input voltage, V in should be capacitively bypassed to
reduce AC impedance and minimize noise effects due to the
switching internals in the device. If the device is loaded from
V in
+
2
+
V out to GND, it is recommended that a large value capacitor
(at least equal to C 1 ) be connected from V in to GND. If the
device is loaded from V in to V out a small (0.7 m F) capacitor
3
4
between the pins is sufficient.
MAX828: Capacitors = 10 m F
MAX829: Capacitors = 3.3 m F
Figure 24. Voltage Inverter
http://onsemi.com
7
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| MAX829EUK-T | 功能描述:电荷泵 Switched-Capacitor Voltage Inverter 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 |
| MAX829EUK-TG05 | 功能描述:电荷泵 Switched-Capacitor Voltage Inverter 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 |
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| MAX830CWE | 功能描述:直流/直流开关调节器 RoHS:否 制造商:Maxim Integrated 最大输入电压:30 V 开关频率:110 KHz 输出电压: 输出电流:1.7 A (Typ) 输出端数量:1 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-16 Wide |
| MAX830CWE+ | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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