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

9.5A BSV Series

10

BDD20150226

8-5 P-Good pin

Output state of the converter may be obtained by using P-Good pin. This pin is pulled up internally to

+Vin pin with 47kΩ resistor. When output voltage (+Sense pin voltage) goes out of the converter’s

pre-set range, P-Good pin becomes low.

・ Vout < 1.2V : | Output voltage-Set voltage | ≦72mV typ. -> High

・ Vout ≧1.2V: | Output voltage-Set voltage | ≦6.1% typ. of set voltage -> High

However, even if the above conditions are fulfilled, output voltage may decrease to Low under the

following circumstances.

・ Potential difference between input and output: Vin - Vout < 0.7

・ Input voltage less than 3V

・ Output current in over current state

・

IC’s junction temp exceeding 150ºC typ.

+Vin

2,3,4

23

GND 5,6,7,8

P-Good

47kΩ

9.

Protection against reverse connection for input power supply (example)

This product is a DC-DC converter with non-isolation between input and output to have a positive

polarity step down to a positive polarity. This product will be damaged if erroneously connected with

reverse input polarity. To cope with possible reverse connection, add a protection circuit as shown in the

following figure.

The following is an example using a fuse and a diode.

2,3,4

1

9,10,11

+Vout

5,6,7,8

FUSE

+Vin

Trim

on/off

12

GND

D1

+Vin

Load

BSV-3.3S9R5

ｼﾘｰｽﾞ

Series