参数资料
| 型号： | MIC2174-1YMM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 20/27页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 10-MSOP |
| 产品培训模块： | MIC2124 Synchronous Current Mode DC-DC Buck Controller |
| 标准包装： | 2,500 |
| 系列： | Hyper Speed Control™ |
| PWM 型： | 混合物 |
| 输出数： | 1 |
| 频率 - 最大： | 375kHz |
| 占空比： | 87% |
| 电源电压： | 3 V ~ 40 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
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V REF × R1
Micrel, Inc.
Step 3. Select C inj as 100nF, which could be considered
as short for a wide range of the frequencies.
Setting Output Voltage
The MIC2174/MIC2174C requires two resistors to set
the output voltage as shown in Figure 8.
MIC2174/MIC2174C
Once R1 is selected, R2 can be calculated using:
R2 = (42)
V OUT ? V REF
In addition to the external ripple injection added at the
FB pin, internal ripple injection is added at the inverting
input of the comparator inside the MIC2174, as shown in
Figure 9. The inverting input voltage V INJ is clamped to
1.2V. For applications with high V HSD and high V OUT , the
swing of V INJ will be clamped. The clamped V INJ reduces
the line regulation because it is reflected back as a DC
error on the FB terminal. Therefore, the maximum output
voltage of MIC2174 should be limited to 5.5V for up to
28V V HSD and 3.6V for V HSD higher than 28V. If a higher
output voltage is required, use the MIC2176 instead.
Figure 8. Voltage-Divider Configuration
The output voltage is determined by the equation:
V OUT = V REF × (1 +
R1
R2
)
(41)
Figure 9. Internal Ripple Injection
where, V REF = 0.8V. A typical value of R1 can be
between 3k ? and 10k ? . If R1 is too large, it may allow
noise to be introduced into the voltage feedback loop. If
R1 is too small, it will decrease the efficiency of the
power supply, especially at light loads.
September 2010
20
M9999-091310-C
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2174C | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Synchronous Buck Controller Featuring Adaptive On-Time Control 40V Input, 300kHz |
| MIC2174C-1YMM | 功能描述:DC/DC 开关控制器 Low Cost 40V Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MIC2174C-1YMM TR | 功能描述:DC/DC 开关控制器 Low Cost 40V Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MIC2176-1 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Wide Input Voltage, Synchronous Buck Controllers Featuring Adaptive On-Time Control |
| MIC2176-1YMM | 功能描述:DC/DC 开关控制器 76V Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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