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參數(shù)資料
| 型號： | MAX1685EEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Low-Noise, 14V Input, 1A, PWM Step-Down Converters |
| 中文描述： | 2.3 A SWITCHING REGULATOR, 680 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-16 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 234K |
| 代理商： | MAX1685EEE |
Inverting Output
Interchanging the ground and V
OUT
connections yields
a negative voltage supply (Figure 4). The component
selections are the same as for a positive voltage con-
verter. The absolute maximum ratings limit the output
voltage range to -1.25V to +5.5V and the maximum
input voltage range to 14V -
V
OUT
.
PC Board Layout
High switching frequencies and large peak currents
make PC board layout a very important part of design.
Poor design can result in excessive EMI on the feed-
back paths and voltage gradients in the ground plane,
both of which result in instability or regulation errors.
Power components such as the MAX1684/MAX1685
inductor, input filter capacitor, and output filter capacitor
should be placed as close together as possible, and
their traces kept short, direct, and wide, Connect their
ground nodes in a star-ground configuration. Keep the
extra copper on the board and integrate into ground as
a pseudo-ground plane.
When using external feedback, the feedback network
should be close to FB, within 0.2 inch (5mm), and the
output voltage feedback should be tapped as close to
the output capacitor as possible. Keep noisy traces,
such as those from LX, away from the voltage feedback
network. Separate the noisy traces by grounded cop-
per. Place the small bypass capacitors within 0.2 inch
(5mm) of their respective inputs. The MAX1684 evalua-
tion kit manual illustrates an example PC board layout,
routing, and pseudo-ground plane.
Connect AIN to IN with a short (0.2 inch) metal trace or a
1
resistor and bypass AIN to PGND with a 0.1μF capac-
itor. This acts as a lowpass filter to reduce noise at AIN.
M
Low-Noise, 14V Input, 1A, PWM
S tep-Down Converters
______________________________________________________________________________________
13
Pin Configuration
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
CVH
PGND
SHDN
LX
LX
BOOT
STBY
ILIM/SS
SYNC/PWM
TOP VIEW
MAX1684
MAX1685
QSOP
AIN
IN
REF
CVL
AGND
FB
CC
Chip Information
TRANSISTOR COUNT: 2061
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1685EEE+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 14V 1A PWM Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(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 |
| MAX1685EEE+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 14V 1A PWM Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(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 |
| MAX1685EEE-T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 14V 1A PWM Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(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 |
| MAX1685EVKIT | 功能描述:電源管理IC開發(fā)工具 Evaluation Kit for the MAX1684 MAX1685 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX1686EUA | 功能描述:電荷泵 3-5V Regulating Chrg Pump For SIM Cards RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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