Datasheet

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SLUS589B− NOVEMBER 2003 − REVISED FEBRUARY 2005
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APPLICATION INFORMATION
UDG−03166
GND
Fixed Delay
Adaptive Delay
Predictive Delay
Channel Conduction
Body Diode Conduction
Figure 2. Switch Node Waveforms for Synchronous Buck Converter
SHORT CIRCUIT PROTECTION
Overcurrent conditions in the TPS4000x are sensed by detecting the voltage across the main MOSFET while
it is on.
Basic Description
If the voltage exceeds a pre-set threshold, the current pulse is terminated, and a counter inside the device is
incremented. If this counter fills up, a fault condition is declared and the device disables switching for a period
of time and then attempts to restart the converter with a full soft-start cycle.