The TPS40210QDGQRQ1 is a current-mode Boost Controller suitable for topologies that require a grounded source N-channel FET, including boost, flyback, SEPIC and various LED driver applications. This device features include programmable soft start, overcurrent protection with automatic retry and programmable oscillator frequency. Current- mode control provides improved transient response and simplified loop compensation. The main difference between the two parts is the reference voltage to which the error amplifier regulates the FB pin.