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ZHCSKN8A december 2019 – april 2023 LM5163H-Q1

PRODUCTION DATA

封装选项

机械数据 (封装 | 引脚)

DDA|8
- MPDS092F

散热焊盘机械数据 (封装 | 引脚)

DDA|8
- PPTD178C

订购信息

7.3.3 Regulation Comparator

The feedback voltage at FB is compared to an internal 1.2-V reference. The LM5163H-Q1 voltage regulation loop regulates the output voltage by maintaining the FB voltage equal to the internal reference voltage, V_REF. A resistor divider programs the ratio from output voltage V_OUT to FB.

For a target V_OUT setpoint, use Equation 10 to calculate R_FB2 based on the selected R_FB1.

Equation 10.

R_{F B 2} = \frac{1.2 V}{V_{O U T} - 1.2 V} \times R_{F B 1}

TI recommends selecting R_FB1 in the range of 100 kΩ to 1 MΩ for most applications. A larger R_FB1 consumes less DC current, which is mandatory if light-load efficiency is critical. TI does not recommend R_FB1 larger than 1 MΩ as the feedback path becomes more susceptible to noise. Routing the feedback trace away from the noisy area of the PCB and keeping the feedback resistors close to the FB pin is important.