171010601 查看數據表（PDF） - Wurth Elektronik GmbH & Co. KG, Germany.

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171010601

MagI3C Power Module VDRM – Variable Step Down Regulator Module

Wurth Elektronik GmbH & Co. KG, Germany. 

WPMDM1500602 / 171050601

MagI3C Power Module

VDRM – Variable Step Down Regulator Module

Ratiometric tracking

Ratiometric output tracking indicates that the output voltages of both the master and the slave reach their preset value at the

same time. This means also that the soft-start duration is the same for both modules. The condition to implement a

ratiometric tracking is:

RTKT2 = RFBT1

RTKB2 RFBB1

(15)

The values for the tracking resistive divider should be selected small enough to minimize the effect of the internal 50uA

current source. The curve below shows the ratiometric tracking with RTKT2 = 1kΩ, RTKB2=316Ω (for the feedback resistor

divider the values of the evaluation board are used, see “Bill of Material” on page 48).

5,0

4,0

3,0

2,0

1,0

0,0

0

VIN = 12V, TA = 25 C, CSS1 = 470nF, no load

tSS1 = tSS2

5

10

15

20

25

30

Time [ms]

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© July 2018

Würth Elektronik eiSos GmbH & Co. KG – Data Sheet Rev. 2.0

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