171030601 データシートの表示（PDF） - Wurth Elektronik GmbH & Co. KG, Germany.

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171030601

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

DESIGN FLOW

The next 7 simple steps will show how to select the external components to design your power application.

Essential Steps

1. Set the output voltage

2. Select the input capacitor

3. Select the output capacitor

4. Select the soft-start capacitor

Optional Steps

5. Voltage tracking

6. Select the under voltage lockout divider

7. Synchronization to an external clock

VIN

GND

7.

2.

CIN

RENT

6.

RENB

1

VIN

7

VOUT

Modu le

2 SYNC

FB 5

3

EN

AGND 4

PGND SS/TRK

EP

6

4.

5.

CSS

RFBT

1.

RFBB

VOUT

3.

COUT

GND

Step 1 Set the output voltage (VOUT)

The output voltage is determined by a divider of two resistors connected between VOUT and ground. The midpoint of the

divider is connected to the FB input. The ratio of the feedback resistors for a desired output voltage is:

RFBT = ( VOUT) - 1

RFBB

VFB

(1)

Where VFB = 0.796V (see “Electrical Specifications” on page 5). These resistors should be chosen from values in the range

of 1kΩ to 20kΩ.

For VOUT = 0.8V the FB pin can be connected to the output directly and RFBB can be set to 8.06kΩ to provide minimum

output load (for VOUT < 2.5V). A table of values for RFBT and RFBB, is included in the “Typical Schematic” section (page 39).

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© July 2018

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

18/56

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