MIC2111B Datasheet, PDF (21/35 Pages) Micrel Semiconductor – High-Performance, Multi-Mode, Step-Down Controller

Micrel, Inc.
Temperature Sense Input
The MIC2111B has a dedicated input for thermal sense
from intelligent power stages. The temperature sense pin
(TJ) senses the voltage divided from thermal sense
signal and sends it to the comparator. If this voltage is
higher than the reference voltage, the thermal shutdown
engages and FAULTb is pulled low. Thermal shutdown
threshold can be programmed through a resistive divider
from TJ.
R₁
=
R
4
×


V_TSENSE −
0.6V
0.6V


Eq. 2
Figure 9. Thermal-Shutdown Programming
Output will be turned off by pulling FAULTb low after TJ
fault is triggered. The fault will be released after
hysteresis of 50mV is achieved.
MIC2111B
October 13, 2015
21
Revision 2.1