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TPS40195,pdf(4.5V TO 20V SYNCH
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The TPS40195 is a flexible synchronous buck controller that operates from a nominal 4.5 V to 20 V supply. This controller implements voltage mode control with the switching frequency adjustable from 100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short circuit limit, programmable undervoltage lockout (UVLO) and synchronization capability. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Over-current detection is done by sensing the voltage drop across the low-side MOSFET when it is on, and comparing it with a user programmable threshold.
The threshold is set with a single external resistor connected from ILIM to GND.
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