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參數資料
| 型號： | MAX1681ESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters |
| 中文描述： | SWITCHED CAPACITOR CONVERTER, 1490 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, MS-012A, SOIC-8 |
| 文件頁數： | 9/12頁 |
| 文件大?。?/td> | 103K |
| 代理商： | MAX1681ESA |
Combined Doubler and Inverter
Figure 3 shows a single MAX1680/MAX1681 as an
inverter and a doubler. The maximum output current is
the sum of the loads on the two outputs and is still limit-
ed to 125mA. As the device is loaded, the output volt-
ages move toward ground. In this particular
configuration, connect LV to GND (inverter). The diodes
used in the circuit cause a drop of approximately 0.7V
in the doubler’s output voltage, impacting efficiency.
Compatibility with the MAX 660 and
MAX 860/MAX 861
The MAX1680/MAX1681 can be used in place of the
MAX860/MAX861, except for the SHDN and FSEL pins.
The MAX1680/MAX1681 shut down with a high input
voltage, compared with the MAX860/MAX861. The
MAX1680/MAX1681 have only two frequency choices.
Replacing the MAX660 with the MAX1680/MAX1681
involves a wiring change, as the external oscillator pin
is replaced by the shutdown feature. Table 5 compares
the devices.
M
125mA, Frequenc y-S elec table,
S witc hed-Capac itor Voltage Converters
_______________________________________________________________________________________
9
MAX1681
GND
FSEL
IN
+V
INPUT
CAP+
SHDN
1
μ
F
1
μ
F
LV
CAP-
OUT
GND
MAX1681
"n"
FSEL
IN
CAP+
SHDN
1
μ
F
1
μ
F
1
μ
F
V
OUT
NOTE: USE 4.7
μ
F CAPACITORS FOR MAX1680.
V
OUT
= -V
INPUT
R
= R
OUT
OF SINGLE DEVICE
NUMBER OF DEVICES (n)
LV
CAP-
OUT
Figure 2. Paralleling MAX1680/MAX1681s to Increase Output Current
MAX1681
GND
FSEL
IN
+V
INPUT
CAP+
SHDN
1
μ
F
1
μ
F
1
μ
F
1
μ
F
1
μ
F
LV
CAP-
OUT
V
OUT
= -V
INPUT
D1
IN4148
D2
IN4148
V
OUT
= 2V
INPUT
-V
FD1
-V
FD2
NOTE: USE 4.7
μ
F CAPACITORS FOR MAX1680.
Figure 3. Combined Doubler and Inverter
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1681ESA+ | 功能描述:直流/直流開關轉換器 125mA f-Select Swtcd Voltage Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX1681ESA+ | 制造商:Maxim Integrated Products 功能描述:SEMICONDUCTOR ((NW)) |
| MAX1681ESA+T | 功能描述:直流/直流開關轉換器 125mA f-Select Swtcd Voltage Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX1681ESA-T | 功能描述:直流/直流開關轉換器 125mA f-Select Swtcd Voltage Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX16820ATT+ | 制造商:Maxim Integrated Products 功能描述:LED DRVR 5V/9V/12V/15V/18V/24V 6TDFN EP - Rail/Tube |
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