(5)

Leaving the SS/TR pin un-connected provides the fastest start-up ramp of 150µs typically. If the device is set to

shutdown (EN = GND), undervoltage lockout, or thermal shutdown, an internal resistor pulls the SS/TR pin to

GND tomake sure of a proper low level. Returning from those states causes a new start-up sequence.

A voltage applied at the SS/TR pin can also be used to track a controller voltage. The output voltage follows this

voltage in both directions up and down in forced PWM mode. In PFM mode, the output voltage decreases based

on the load current. An external voltage applied on SS/TR is internally clamped to the feedback voltage (0.6V).

TI recommends to set the final value of the external voltage on SS/TR to be slightly above 0.6V to make sure

the device operates with the internal reference voltage when the power-up sequencing is finished. See Section

9.3.1.

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TPSM82810, TPSM82813

SLUSDN6D – SEPTEMBER 2019 – REVISED JUNE 2026

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