Low Pin Count, Low Vin Synchronous Buck DC/DC Controller

The TPS40040 and TPS40041 dc-to-dc controllers are designed to operate from a 2.25-V to 5.5-V input source. To reduce the number of external components, several operating parameters are fixed internally; namely, frequency, soft start time, and short Circuit Protection (SCP) levels. For example, the operating frequencies of TPS40040 1 are 300 kHz/600 kHz, respectively.
One of three short circuit threshold levels may be selected by the addition of an external resistor from the COMP pin to circuit ground. During power on, and before the internal soft start commands the output voltage to rise, the TPS40040 1 enters a calibration cycle, measures the current out of the COMP pin, and selects an internal SCP threshold voltage. At the end of the 1.6-ms calibration time, the output voltage is allowed to rise for a 4-ms soft start. During operation, the selected SCP threshold voltage is compared to the upper MOSFET?s voltage drop during its ON time to determine whether there is an overload condition.
By Texas Instruments
TPS40041 's PackagesTPS40041 's pdf datasheet

TPS40041 pdf datasheet download

TPS40041 Pinout, Pinouts
TPS40041 pinout,Pin out
This is one package pinout of TPS40041,If you need more pinouts please download TPS40041's pdf datasheet.

TPS40041 Application circuits
TPS40041 circuits
This is one application circuit of TPS40041,If you need more circuits,please download TPS40041's pdf datasheet.

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