AAT4670_06 Datasheet, PDF (9/13 Pages) Advanced Analogic Technologies – Dual-Input, Dual-Output Load Switch

AAT4670
Dual-Input, Dual-Output Load Switch
For example, if an application is specified to oper-
ate in 50°C environments, the PCB operates at
temperatures as high as 85°C. The application is
sealed and its PCB is small, causing R_θJA to be
approximately 120°C/W. Using Equation 2:
To prevent thermal limiting, the operating load cur-
rent in the application must be less than 1.25A
which lies in the current limiting range. So, in this
application, any operating current below the cur-
rent limit threshold is allowed.
Eq. 3:
I_MAX ⁼
115 - 85
160m · 120
=
1.25A
Timing Diagram
EN
OUT
t1 t2
t3 t4
4670.2006.09.1.4
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