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参数资料
| 型号： | MAX680CPA |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/8页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ DL 8DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 升压（升压），切换电容（充电泵），反相 |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | ±4 V ~ ±12 V |
| 输入电压： | 2 V ~ 6 V |
| 频率 - 开关： | 8kHz |
| 电流 - 输出： | 10mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-PDIP |
+5V to ±10V Voltage Converters
22 μ F
22 μ F
1
C1-
MAX680
V+
8
1
C1-
MAX680
V+
8
V+ OUT
22 μ F
2
3
C2+
C2-
C1+
V CC
7
6
22 μ F
2
3
C2+
C2-
C1+
V CC
7
6
22 μ F
V CC IN
4
V-
GND
5
4
V-
GND
5
GND
22 μ F
V- OUT
Figure 4. Paralleling MAX680s For Lower Source Resistance
The MAX680/MAX681 are not voltage regulators: the
output source resistance of either charge pump is
approximately 150 ? at room temperature with V CC at
5V. Under light load with an input V CC of 5V, V+ will
approach +10V and V- will be at -10V. However both ,
V+ and V- will droop toward GND as the current drawn
from either V+ or V- increases, since the negative con-
verter draws its power from the positive converter’s out-
put. To predict output voltages, treat the chips as two
separate converters and analyze them separately. First,
the droop of the negative supply (V DROP- ) equals the
current drawn from V- - (I L- ) times the source resistance
of the negative converter (RS-):
V DROP - = I L - x RS-
Likewise, the positive supply droop (V DROP+ ) equals
the current drawn from the positive supply (I L+ ) times
the positive converter ’s source resistance (RS+),
except that the current drawn from the positive supply
is the sum of the current drawn by the load on the posi-
tive supply (I L+ ) plus the current drawn by the negative
converter (I L- ):
(V DROP +) = I L + x RS+ = (I L + + I L -) x RS+
The positive output voltage will be:
V+ = 2V CC – V DROP +
The negative output voltage will be:
V- = (V+ - V DROP ) = - (2V CC - V DROP + - V DROP -)
The positive and negative charge pumps are tested
and specified separately to provide the separate values
of output source resistance for use in the above formu-
las. When the positive charge pump is tested, the neg-
ative charge pump is unloaded. When the negative
charge pump is tested, the positive supply V+ is from
an external source, isolating the negative charge
pump.
Calculate the ripple voltage on either output by noting
that the current drawn from the output is supplied by
the reservoir capacitor alone during one half-cycle of
the clock. This results in a ripple of:
V RIPPLE = 1 ? 2 IOUT ( 1 ? f PUMP )( 1 ? CR)
For the nominal f PUMP of 8kHz with 10μF reservoir
capacitors, the ripple will be 30mV with I OUT at 5mA.
Remember that in most applications, the positive
charge pump’s I OUT is the load current plus the current
taken by the negative charge pump.
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX680CPA+ | 功能描述:电荷泵 5V to +/-10V Voltage Converter 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 |
| MAX680CSA | 功能描述:电荷泵 5V to +/-10V Voltage Converter 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 |
| MAX680CSA | 制造商:Maxim Integrated Products 功能描述:IC DUAL VOLT CONVERTER SOIC8 680 |
| MAX680CSA+ | 功能描述:电荷泵 5V to +/-10V Voltage Converter 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 |
| MAX680CSA+T | 功能描述:电荷泵 5V to +/-10V Voltage Converter 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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