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參數(shù)資料
| 型號(hào)： | MAX761 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類(lèi)： | DC/DC變換器 |
| 英文描述： | 12V/ or Adjustable, High-Efficiency, Low I Q , Step-Up DC-DC Converters(12V/可調(diào),高效率,低IQ值,步升DC-DC變換器) |
| 中文描述： | 12V/15V或可調(diào)、高效率、低IQ、升壓型DC-DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 11/12頁(yè) |
| 文件大?。?/td> | 146K |
| 代理商： | MAX761 |
Reference Capacitor
Bypass REF with a 0.1μF capacitor. REF can source up
to 100μA.
Setting the Low-Battery Detector Voltage
To set the low-battery detector’s falling trip voltage
(V
TRIP
), select R3 between 10k
and 500k
(Figures 2
and 3), and calculate R4 as follows:
R4 = R3 [(V
TRIP
- V
REF
)]
V
REF
where V
REF
= 1.5V.
The rising trip voltage is higher because of the compara-
tor’s hysteresis of approximately 20mV, and can be cal-
culated by:
V
TRIP
(rising) = (V
REF
+ 20mV)(1 + R4/R3).
Connect a high-value resistor (larger than R3 + R4)
between LBI and LBO if additional hysteresis is required.
Connect a pull-up resistor (e.g., 100k
) between LBO
and V
OUT
. Tie LBI to GND or V+ and leave LBO floating
if the low-battery detector is not used.
___________Applications Information
Layout Considerations
Proper PC board layout is essential because of high cur-
rent levels and fast switching waveforms that radiate
noise. Minimize ground noise by connecting GND, the
input bypass-capacitor ground lead, and the output filter-
capacitor ground lead to a single point (star ground con-
figuration). Also minimize lead lengths to reduce stray
capacitance, trace resistance, and radiated noise. The
traces connected to FB and LX, in particular, must be
short. Place bypass capacitor C2 as close as possible to
V+ and GND.
M
12V /15V or Adjustable, High-Effic ienc y,
Low I
Q
, Step-Up DC-DC Converters
______________________________________________________________________________________
11
INDUCTORS
DIODES
Sumida
CD54-180 (22μH)
Coiltronics
CTX 100-series
Matsuo
267 series
Surface Mount
Sanyo
OS-CON series
Low-ESR organic
semiconductor
Sumida
RCH855-180M
Miniature Through-Hole
PRODUCTION METHOD
Nichicon
PL series
Low-ESR electrolytics
United Chemi-Con
LXF series
Renco
RL 1284-18
Low-Cost Through-Hole
CAPACITORS
Nihon
EC10 series
Motorola
1N5817,
MUR105
Table 1. Component Suppliers
Coiltronics
Matsuo
Matsuo
Nichicon
Nihon
Renco
Sanyo
Sanyo
Sumida
Sumida
United Chem-Con
(USA)
(USA)
(Japan)
(USA)
(USA)
(USA)
(USA)
(Japan)
(USA)
(Japan)
(USA)
(407) 241-7876
(714) 969-2491
81-6-337-6450
(708) 843-7500
(805) 867-2555
(516) 586-5566
(619) 661-6835
(0720) 70-1005
(708) 956-0666
81-3-607-5111
(714) 255-9500
FAX (407) 241-9339
FAX (714) 960-6492
FAX 81-6-337-6456
FAX (708) 843-2798
FAX (805) 867-2556
FAX (516) 586-5562
FAX (619) 661-1055
FAX (0720) 70-1174
FAX 81-3-607-5144
FAX (714) 255-9400
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX761C/D | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)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(fēng)格:SMD/SMT |
| MAX761C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX761CPA | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)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(fēng)格:SMD/SMT |
| MAX761CPA+ | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 12/15/AdjV Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)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(fēng)格:SMD/SMT |
| MAX761CSA | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)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(fēng)格:SMD/SMT |
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