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參數(shù)資料
| 型號： | MAX757 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 3.3V/5V/Adjustable-Output, Step-Up DC-DC Converters(可調,高效率,步升DC-DC變換器) |
| 中文描述： | 3.3V/5V/可調輸出、升壓型DC-DC轉換器 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 129K |
| 代理商： | MAX757 |
M
3.3V /5V /Adjustable-Output,
S tep-Up DC-DC Converters
_______________________________________________________________________________________
7
N
N
MAX756
GND
V
OUT
V
IN
TRIG
Q
ONE-SHOT
MINIMUM
OFF-TIME
ONE-SHOT
Q
F/F
S
R
MAXIMUM
ON-TIME
ONE-SHOT
TRIG
Q
ONE-SHOT
LX
OUT
REFERENCE
REF
LBI
LBO
3/5
SHDN
Figure 2. MAX756 Block Diagram
The ESR of both bypass and filter capacitors affects
efficiency. Best performance is obtained by using spe-
cialized low-ESR capacitors, or connecting two or more
filter capacitors in parallel. The smallest low-ESR SMT
tantalum capacitors currently available are Sprague
595D series, which are about half the size of competing
products. Sanyo OS-CON organic semiconductor
through-hole capacitors also exhibit very low ESR, and
are especially useful for operation at cold tempera-
tures. Table 1 lists suggested capacitor suppliers.
Rec tifier Diode
For optimum performance, a switching Schottky diode,
such as the 1N5817, is recommended. 1N5817 equiv-
alent diodes are also available in surface-mount pack-
ages from Collmer Semiconductor in Dallas, TX, phone
(214) 233-1589. The part numbers are SE014 or
SE024. For low output power applications, a pn junc-
tion switching diode, such as the 1N4148, will also
work well, although efficiency will suffer due to the
greater forward voltage drop of the pn junction diode.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX757C/D | 功能描述:直流/直流開關轉換器 Adjustable Step-Up DC-DC 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(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX757C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX757CPA | 功能描述:直流/直流開關轉換器 3.3/5/AdjV-Out Step Up DC/DC 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(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX757CPA+ | 功能描述:直流/直流開關轉換器 3.3/5/AdjV-Out Step Up DC/DC 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(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX757CSA | 功能描述:直流/直流開關轉換器 3.3/5/AdjV-Out Step Up DC/DC 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(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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