参数资料
型号: MIC2145YMM TR
厂商: Micrel Inc
文件页数: 8/15页
文件大小: 0K
描述: IC REG BST FLYBK SEPIC ADJ 8MSOP
标准包装: 1
类型: 升压(升压),回扫,Sepic
输出类型: 可调式
输出数: 1
输出电压: 3 V ~ 16 V
输入电压: 2.4 V ~ 16 V
频率 - 开关: 450kHz
电流 - 输出: 500mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
包装: 标准包装
供应商设备封装: 8-MSOP
产品目录页面: 1091 (CN2011-ZH PDF)
其它名称: 576-1540-6
MIC2145
Application Information
Pre-designed circuit information is at the end of this section.
Output Voltage
The output voltage of the regulator can be set between 2.4V
and 16V by connecting a resistor divider at the FB pin. The
resistor values are selected by the following equations:
Micrel, Inc.
A value of 1M ? is recommended for R1 to minimize the
quiescent current when the part is off. Then, R2 can be solved
using the above equation. A feed-forward capacitor, C FF ,
ranging from 5pF to 100pF can be used in parallel with R1 to
reduce the peak-to-peak output voltage ripple, which is
shown in Figures 4 and 5.
R 2 =
1.08 × R1
V OUT ? 1 . 08
V OUT
AC
(100mV/div)
V SW
(5V/div)
Time 20 μ s
Figure 4. Without Feed-Forward Capacitor
V OUT
AC
(100mV/div)
V SW
(5V/div)
Time 4 μ s
Figure 5. With Feed-Forward Capacitor (100pF)
M9999-042205
8
April 2005
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