Datasheet

5V/2.4A 150KHz 40V Buck DC to DC Converter For USB Interface

XL2012

Rev 1.0

www.xlsemi.com

8

Output short shutdown function description

The output short shutdown function is built in XL2012. The short protection circuit monitors the

output voltage, whenever FB pin voltage is below 1.5V, the short circuit protection circuit is

triggered, the converter will be shutdown, input current less than 5mA.

When the short fault is removed，if output load is floating, then converter will restart up, the

output voltage will return to normal; if output load isn’t floating, then converter must be power

reset , the output voltage will comeback.

Figure8. The converter will be shutdown when output short happen.

8

10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

2.0

Input current VS Input voltage

Input voltage(V)

Figure9. The input current curve when output short happen.

VOUT

Swithing