Datasheet
XL2012
5V/2.4A 150KHz 40V Buck DC to DC Converter For USB Interface
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.
VOUT
Swithing
Figure8. The converter will be shutdown when output short happen.
Input current VS Input voltage
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
8
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
Input voltage(V)
Figure9. The input current curve when output short happen.
Rev 1.0
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8
XLSEMI [ XLSEMI ]
