Datasheet

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 
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SLVS367A − MARCH 2001 − REVISED JUNE 2001
2
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description (continued)
The SYNC pin can be used regardless of load to disable the synchronous FET driver and operate the power
supply nonsynchronously.
A power ready/undervoltage lockout function outputs the status of the V
CC
-pin voltage and driver regulator
output on the open-drain PWRRDY pin. This feature can be used to enable a controller’s output once the V
CC
voltage reaches the threshold and the regulator output is stable. This function ensures both FET drivers are off
when the V
CC
voltage is below the voltage threshold.
The TPS2838/39/48/49 devices are offered in the thermally enhanced 14-pin and 16-pin PowerPAD TSSOP
package. The PowerPAD package features an exposed leadframe on the bottom that can be soldered to the
printed-circuit board to improve thermal efficiency. The TPS2838/48 are noninverting control logic while the
TPS2839/49 drivers are inverting control logic.