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參數資料
| 型號： | MAX607 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards |
| 中文描述： | 小尺寸、5V/12V或可調、升壓型DC-DC轉換器，用于PCMCIA閃存卡 |
| 文件頁數： | 11/12頁 |
| 文件大小： | 213K |
| 代理商： | MAX607 |
M
Low-Profile, 5V/12V or Adjustable, Step-Up
DC-DC Converters for Flash Memory/PCMCIA Cards
______________________________________________________________________________________
11
Diode S elec tion
The MAX606/MAX607’s high switching frequency
demands a high-speed rectifier. Use a Schottky diode
with at least a 0.5A average current rating and a 1.2A
peak current rating, such as an MBR0520L. See Table
3 for a list of component suppliers.
Capac itor S elec tion
Output Filter Capacitor
The output voltage ripple is a function of the output
capacitor’s equivalent series resistance (ESR) and
capacitance. For best performance, use ceramic
capacitors. Higher-ESR capacitors, such as tantalums,
will cause excessive ripple. See Table 3 for a list of
component suppliers.
The output voltage ripple is approximately 100mVp-p
for the 12V Standard Application Circuit (Figure 1) and
50mV for the 5V circuit (Figure 2). To further reduce this
ripple, or to reduce the ripple on a different application
circuit, increase the value of the output filter capacitor.
If this capacitor is low ESR (e.g., ceramic), the output
voltage ripple will be dominated by this capacitance.
Input Bypass Capacitors
For applications where the MAX606/MAX607 are physi-
cally close to the input supply’s filter capacitor (e.g., in
PCMCIA drivers from the host computer), the input
bypass capacitor may not be necessary.
In other applications where the MAX606/MAX607 are
more than a few inches away from the supply (such as
memory cards), the input bypass capacitor is needed
to reduce reflected current ripple to the supply and
improve efficiency by creating a low-impedance path
for the ripple current. Under these circumstances, the
associated high Q and low ESR of ceramic capacitors
do not diminish the problem. Therefore, include some
low-Q, moderate-ESR capacitance (e.g., tantalum) at
the input in order to reduce ringing.
Layout
The MAX606/MAX607’s high-frequency operation and
high peak currents make PC board layout critical to
minimize ground bounce and noise. Locate input
bypass and output filter capacitors as close to the
device pins as possible. All connections to OUT (and to
FB when operating in adjustable-output mode) should
also be kept as short as possible. A ground plane is
recommended. Solder GND and PGND directly to the
ground plane. Refer to the MAX606/MAX607 evaluation
kit manual for a suggested surface-mount layout.
___________________Chip Topography
LX
0.084"
(2.134mm)
0.058"
(1.473mm)
LX
LX
OUT
SS
GND
PGND
PGND
PGND
SEL
SHDN
V+
TRANSISTOR COUNT: 613
SUBSTRATE CONNECTED TO GND
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| MAX6070AAUT18+T | 制造商:Maxim Integrated Products 功能描述:LOW-NOISE, HIGH-PRECISION SERIES VOLTAGE REFERENCES - Tape and Reel 制造商:Maxim Integrated Products 功能描述:LOW-NOISE HP VOLTAGE REFERENCES 制造商:Maxim Integrated Products 功能描述:Voltage & Current References I2C Configble Phase Redundancy Cntlr |
| MAX6070AAUT21+T | 功能描述:基準電壓& 基準電流 Filtered 2.1V .04% Accuracy VR RoHS:否 制造商:STMicroelectronics 產品:Voltage References 拓撲結構:Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數（典型值）:100 PPM / C 串聯 VREF - 輸入電壓（最大值）: 串聯 VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| MAX6070AAUT25+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6070AAUT25+T | 功能描述:基準電壓& 基準電流 Low Noise/Drift Voltage Reference RoHS:否 制造商:STMicroelectronics 產品:Voltage References 拓撲結構:Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數（典型值）:100 PPM / C 串聯 VREF - 輸入電壓（最大值）: 串聯 VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
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