For applications in which synchronous rectification (SR) is desired in order to increase overall converter efficiency, there are TPS7H500x-SP controllers with a single SR output (SRA) or dual SR outputs (SRA and SRB). Table 8-3 below shows the synchronous rectifier outputs that are available for each of the devices. Similar to the primary switching outputs, the peak current capability is roughly 150 mA and an external gate drive solution is recommended. The TPS7H5001-SP is the only controller in the series that contains the SRB output, and this output is only active when the duty cycle limit is set to 50% by connecting the DCL pin to AVSS. The SRA/SRB outputs will be off during the soft-start period and start switching when the voltage on SS exceeds 1 V. A small voltage transient may appear on the converter output when SRA/SRB become active.