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| 型号： | MIC4723YML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 3A 12MLF |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 1V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 3A |
| 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： | 12-VFDFN 裸露焊盘，12-MLF? |
| 包装： | 标准包装 |
| 供应商设备封装： | 12-MLF?（4x4） |
| 产品目录页面： | 1093 (CN2011-ZH PDF) |
| 其它名称： | 576-1656-6 |
Micrel, Inc.
losses on the Schottky diode.
Inductor conduction losses (P L ) can be calculated by
multiplying the DC resistance (DCR) times the square of
the output current;
P L = DCR × I OUT 2
Also, be aware that there are additional core losses
associated with switching current in an inductor. Since
most inductor manufacturers do not give data on the
type of material used, approximating core losses
becomes very difficult, so verify inductor temperature
rise.
Switching losses occur twice each cycle, when the
switch turns on and when the switch turns off. This is
caused by a non-ideal world where switching transitions
are not instantaneous, and neither are currents. Figure 6
demonstrates how switching losses due to the
transitions dissipate power in the switch.
MIC4723
Figure 6. Switching Transition Losses
Normally, when the switch is on, the voltage across the
switch is low (virtually zero) and the current through the
switch is high. This equates to low power dissipation.
When the switch is off, voltage across the switch is high
and the current is zero, again with power dissipation
being low. During the transitions, the voltage across the
switch (V S-D ) and the current through the switch (I S-D ) are
at middle, causing the transition to be the highest
instantaneous power point. During continuous mode,
these losses are the highest. Also, with higher load
currents, these losses are higher. For discontinuous
operation, the transition losses only occur during the “off”
transition since the “on” transitions there is no current
flow through the inductor.
June 2008
11
M9999-060308-E
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC4723YMME | 功能描述:直流/直流开关调节器 3A 2MHz Buck Regulator in epad MSOP-10 Pkg 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 |
| MIC4723YMME TR | 功能描述:直流/直流开关调节器 3A 2MHz Buck Regulator in epad MSOP-10 Pkg 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 |
| MIC4723YMMEG11 | 制造商:Micrel 功能描述:The Micrel MIC4723YMMEG11 is a 3A Synchronous Buck Regulator. |
| MIC4724 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3A 2MHz Integrated Switch Buck Regulator with 6Vmax Input |
| MIC4724YMME | 功能描述:直流/直流开关调节器 3A 2MHz Buck Regulator in Epad MSOP-10 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 |
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