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参数资料
| 型号： | MIC2250YML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 2A 8MLF |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.5 V ~ 32 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 最高 2.5MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VFDFN 裸露焊盘，8-MLF? |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-MLF?（2x2） |
| 产品目录页面： | 1093 (CN2011-ZH PDF) |
| 其它名称： | 576-3302-6 |
Micrel, Inc.
saturation current rating of the selected inductor should
be 20-30% higher than the 2A specification for proper
operation.
Figure 2. Efficiency Comparison between Lower
and Higher Inductor Values
Input Capacitor
The boost converter exhibits a triangular current
waveform at its input, so an input capacitor is required to
decouple this waveform and thereby reduce the input
voltage ripple. A 10uF to 22uF ceramic capacitor should
be sufficient for most applications. A minimum input
capacitance of 1uF is recommended. The input capacitor
should be as close as possible to the inductor and the
MIC2250, with short PCB traces for good noise
MIC2250
performance.
Output Capacitor
Output capacitor selection is also a trade-off between
performance, size, and cost. Increasing C OUT will lead to
an improved transient response however the size and
cost also increase. X5R and X7R ceramic capacitors are
recommended. For most applications, 2.2uF to 22uF
should be sufficient.
Diode
The MIC2250 requires an external diode for operation.
The diode must be rated for the peak inductor current,
and its reverse voltage rating must be greater than the
output voltage. A Schottky diode is recommended for
lower output voltages due to its lower forward voltage
drop and reverse recovery time. However, at higher
output voltages (>10V), a high speed diode such as
LS4148 can be more efficient as it has the advantage of
considerably lower leakage currents, especially at higher
temperatures. This will greatly improve light load
efficiency when compared to a Schottky diode.
For example: At 70 o C ambient temperature, V IN = 2.5V,
V OUT = 24V at no load.
Input current (Vishay SL04 Schottky) = 2.1mA
Input current (Generic LS4148) = 0.37mA
April 2011
10
M9999-041811-B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2251 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High-Efficiency Low EMI Boost Regulator |
| MIC2251_1105 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High-Efficiency Low EMI Boost Regulator |
| MIC2251-1YD5 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High-Efficiency Low EMI Boost Regulator |
| MIC2251-1YD5 TR | 功能描述:直流/直流开关调节器 High-Efficiency Low EMI Boost Regulator with Dithering Disabled in 5-pin TSOT Package RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC2251-1YD5TR | 制造商:Micrel 功能描述:Regulator Boost 2A 2.5 5.5V EFF SOT23 5 |
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