AT1799
2A Step-Down Voltage Regulator
Cycle-by-Cycle Over-Current Protection
The AT1799 provides cycle-by-cycle over-current protection. Current limit is
accomplished using a separate dedicated comparator. If the current sense amplifier
output voltage is larger than current-limited threshold level, it will be immediately
turned off power MOS. The current-limit feature protects against a hard short or over
current fault at the output.
Thermal-Overload Protection
Thermal-overload protection limits total power dissipation in the AT1799. When the junction
temperature exceeds Tj=160
℃
, a thermal sensor activates the thermal protection, which shuts
down the IC, allowing the IC to cool. Once the device cools down by 15
℃
, IC will
automatically recover normal operation. For continuous operation , do not exceed the absolute
maximum junction-temperature rating of Tj=150
℃
.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
8/23/2006 REV:1.1
Email:
service@aimtron.com.tw
9
AIMTRON [ AIMTRON TECHNOLOGY ]
