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| 型号： | MAX1947ETA30+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC 3V 0.25A 8TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3V |
| 输入电压： | 0.7 V ~ 3.6 V |
| 频率 - 开关： | 最高 2MHz |
| 电流 - 输出： | 250mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 其它名称： | MAX1947ETA30+TDKR |
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
Table 1. Suggested Component Values
APPLICATION
1-Cell Input,
Output < 2.7V
1-Cell Input,
Output > 2.7V
2-Cell Input
LOAD
≤ 50% full load
>50% full load
≤ 50% full load
>50% full load
≤ 50% full load
>50% full load
INPUT CAPACITOR (μF)
2.2
2.2
2.2
2.2
2.2
2.2
OUTPUT CAPACITOR (μF)
4.7
10
4.7
10
4.7
10
INDUCTOR (μH)
3.3
3.3
4.7
4.7
6.8
6.8
Table 2. Suggested Component Manufacturers
MANUFACTURER
Sumida
Taiyo Yuden
PART
Inductor
Output capacitors
PART NUMBER
CDRH3D16 series
4.7μF JMK212BJ475MG,
10μF JMK212BJ106MG
PHONE
81-3-3667-3381
408-573-4150
WEBSITE
www.sumida.com
www.t-yuden.com
Input capacitors
2.2μF LMK107BJ225MA
TDK
Output capacitors
4.7μF C2012X5R0J475K,
10μF C2012X5R0J106K
888-835-6646
www.TDK.com
Input capacitors
2.2μF C1608X5R03225M
Shutdown
The MAX1947 enters shutdown mode when SHDN is
driven low. During shutdown, the synchronous rectifier
disconnects the output from the input, eliminating the DC
conduction path that normally exists with traditional boost
converters in shutdown mode. The output is actively dis-
charged to ground through an internal 500 Ω resistor. The
quiescent current is reduced to 2μA while in shutdown
mode. Drive SHDN high for normal operation. The output
reaches regulation approximately 650μs after SHDN
goes high.
Applications Information
Inductor Selection
An inductor value of 4.7μH performs well in most appli-
cations. The MAX1947 also works with inductors in the
2.2μH to 6.8μH range. Smaller inductance values typi-
cally offer a smaller physical size for a given series
resistance, allowing the smallest overall circuit dimen-
sions but with lower output-current capability. Circuits
using larger inductance values exhibit higher output-
current capability, but are larger for the same series
resistance and current rating.
The inductor’s incremental saturation current rating should
be greater than the peak switch-current limit. However, it
is generally acceptable to bias the inductor into saturation
by as much as 20%, although this slightly reduces
efficiency (see the Electrical Characteristics for the
MAX1947 NFET current limit). Table 1 lists the suggested
components for several typical applications. Also, the
inductor’s DC resistance significantly affects efficiency.
Table 2 lists suggested component manufacturers.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1947ETA33 | 制造商:Maxim Integrated Products 功能描述:LOW INPUT/OUTPUT VOLTAGE STEP-UP DC-DC CONVER - Rail/Tube |
| MAX1947ETA33+ | 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP UP 8TDFN EP - Rail/Tube |
| MAX1947ETA33+T | 功能描述:直流/直流开关转换器 Step-Up w/RESET DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1947ETA33-T | 功能描述:直流/直流开关转换器 Step-Up w/RESET DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1947EVKIT | 功能描述:直流/直流开关转换器 Evaluation Kit for the MAX1947 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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