BD9873CP-V5 데이터 시트보기 (PDF) - ROHM Semiconductor

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BD9873CP-V5

Simple Step-down Switching Regulators

ROHM Semiconductor 

BD9873CP-V5,BD9874CP-V5

Technical Note

Capacitor C3

C3 is for compensating the stability of application frequency characteristics.

When C3 is not available, overshoot or undershoot is possible in starting or in rapid change of load.

Be sure to insert 0.47 μF.

Resistor R1,R2

These resistors determine the output voltage:

VOUT＝1.0V×(1 + R1/R2)

Select resistors less than 10kΩ.

BD9873CP-V5

＜Recommended Components (Example)＞

Inductor

Schottky Diode

Capacitor

L1＝100uH ： RCR1616（SUMIDA）

D1＝RB050LA-40（ROHM）

C1＝100uF ： Al electric capacitor

C2＝4.7uF ： Laminated ceramic capacitor

C3＝0.47μF ： Laminated ceramic capacitor

C4＝680μF ： Al electric capacitor

BD9874CP-V5

＜Recommended Components (Example)＞

Inductor

Schottky Diode

Capacitor

L1＝RCR1616（SUMIDA）

D1＝RB050LA-40（ROHM）

C1＝100uF ： Al electric capacitor

C2＝4.7uF ： Laminated ceramic capacitor

C3＝0.47μF ： Laminated ceramic capacitor

C4＝680μF ： Al electric capacitor

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2009.07 - Rev.A

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