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

BSV-H Series

7

BDD20150227

Bellnix

DC-DC Converter

8.

Usage information

8-1 Standard connection diagram

Vin

C1

9

1

4

7

Load

5,8

SW

R1: Vout Down設定抵抗

3

6

C2

R1

2

C1 : 47μF

C2 : 22μF

+Vin

P-Good

On/Off

GND

-Sense

Trim

+Sense

+Vout

+

BSV-3.3S16R0H

Open=On

Short=Off

Note 1: The product requires that it be mounted on the PCB since more than 70% of the heat is

released through GND pins (5, 8pin) and the rest through +Vin pin and +Vout pin. The patterns

should be taken wide enough to release heat when designing.

Note 2: Keep ON/OFF pin open when not using ON/OFF control.

Note 3: Keep Trim pin open when not using adjustable output.

Note 4: GND pins (5, 8pin) are connected internally. These two pins should be connected to GND line

to make the best use of the product.

Note 5: Make sure that Sense pin is connected on the board. No connection of Sense pin may result in

the voltage output being higher than rated voltage.

Note 6: Avoid wiring patterns directly underneath this product (the first layer). This shall not apply to any

area other than the surface layer on the converter side.

Recommended capacitor

C1 =

47μF

C2 =

2.2μF to 200μF typ. 10000μF max.

C1: Not required as long as impedance is very low and lines between +Vin side and the converter are

connected thick and short. For high impedance, adding a capacitor of low ESR such as an organic

semiconductor solid capacitor or a multi-layered ceramic capacitor is recommended.

C2: Not required due to an internal output capacitor. A multi-layered ceramic capacitor placed on the

load side will be recommended to satisfy electrical characteristics (to reduce ripple noise).

R1: Vout Down Setting Resistor