High-Speed Response Non-Isolated POL DC-DC Converter

9.5A BSV Series

9

BDD20150226

8-4

Adjustable method for output voltage

Keep Trim pin (12pin) OPEN, when using output voltage at 3.3V without adjustment. Output voltage

may be adjusted between 0.8 and 3.3V by connecting a resistor between Trim pin (12pin) and GND

pin (5 to 8pin).

Wiring for Trim pin should be short and straight preferably when using adjustable output voltage

feature. If noise appears on the pin, it causes mal-function.

The below formula should be referred for external resistance. It is important to check output voltage

and adjust resistance in an actual device.

When setting output voltage between 0.8V to 3.3V





3

2

1

4

2

1

4

2

R

Vout

R

I

R

R

R

Vout

R

R

Rx



















(Ω)

R1=51Ω, R2=182Ω, R3=24kΩ, R4=94.3kΩ, I1=0.02733mA, Vout=Desired output voltage (V)

e.g.

Desired output

voltage (V)

Rx calculated

value (k

Ω)

3.3

OPEN

2.5

271.0(270+1)

2.0

121.1(120+1.1)

1.8

89.5(82+7.5)

1.5

54.6(51+3.6)

1.2

30.0

1.0

17.0(15+2)

0.8

6.2

+Vout

Trim

GND

Rx

9,10,11

12

5,6,7,8

R3

R1

I1