参数资料
| 型号： | MIC2169BYMME |
| 厂商： | Micrel Inc |
| 文件页数： | 16/25页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 10-MSOP |
| 特色产品： | MIC2169B Buck Control IC |
| 标准包装： | 100 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 550kHz |
| 占空比： | 92% |
| 电源电压： | 3 V ~ 14.5 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 ~ 85°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1092 (CN2011-ZH PDF) |
| 其它名称： | 576-3545-5 |
Micrel, Inc.
MIC2169B
Figure 13. Open-Loop Gain Margin
Figure 15. MIC2169A Startup without Pre-Bias Support
Figure 15 shows MIC2169B startup with a pre-bias of 1V
on the output, in which the pre-existing output voltage
discharges during soft start.
Figure 14. Open-Loop Phase Margin
Pre-Biased Loads
The MIC2169B supports pre-biased loads. Some
applications have a pre-existing voltage on the output.
This pre-existing or pre-biased load is generated by an
external supply (other than the MIC2169B). During
startup without pre-bias support, MIC2169A will pull the
output voltage to ground through the inductor and low
side FET (see Figure 15).
The MIC2169B prevents the current sinking of any pre-
existing voltage source at the output (see Figure 16). It
does this by keeping the low-side FET off during the soft
start period. In some applications this pre-bias current
sink is not a problem, and the MIC2169A may be used.
In some applications the pre-bias current sink may
cause a problem, and the MIC2169B should be used.
The MIC2169B can support up to 90% of a pre-bias
condition (up to 90% of the final regulated output
voltage) see Figure 17.
Figure 16. MIC2169B Startup with Pre-Bias Support
Figure 16 shows MIC2169B startup with a pre-bias of 1V
on the output, in which the pre-existing output voltage
has no discharge.
April 2010
16
M9999-041210-B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2169BYMME TR | 功能描述:直流/直流开关转换器 Synchronous Step Down 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 |
| MIC2169MM | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:500 KHZ PWM SYNCHRONOUS BUCK CONTROL IC |
| MIC2169YMM | 功能描述:直流/直流开关调节器 Replaced by MIC2169AYMM (Lead Free) 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 |
| MIC2169YMM TR | 功能描述:直流/直流开关调节器 Replaced by MIC2169AYMM TR (Lead Free) 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 |
| MIC2171 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:100kHz 2.5A Switching Regulator Preliminary Information |
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