3.3 V fixed rail, 1 A continuous, 8-SOIC
The TPS76833QDR is a single-output, positive-voltage LDO regulator from Texas Instruments delivering a fixed 3.3 V output at up to 1 A continuous current. The 8-SOIC package (0.154-inch body width) uses the standard SOIC-8 footprint — the die attach paddle is not exposed, so the board copper area under the package is the primary thermal path. For a 1 A load with a 5 V input, the 0.58 V max dropout means the input rail can sag to 3.88 V before the output falls out of regulation. The 60 dB PSRR at 1 kHz attenuates a 100 mVpp ripple on the input to 100 µVpp on the output — useful when the LDO follows a switching regulator feeding an analog rail. Above 100 kHz the rejection rolls off, so the upstream switcher's switching frequency should stay below that corner or a post-filter added.
Protection suite and temperature range
Built-in over-current, over-temperature, and reverse polarity protection mean the regulator handles a shorted output or a reversed input without external clamp diodes. The over-temperature threshold shuts the output off at roughly 160 °C junction; the part recovers automatically when the die cools. The -40 to +125 °C operating range covers industrial enclosures and under-hood automotive environments. The 125 µA quiescent current is the regulator's own draw at no load — in an always-on ECU rail that draws 10 mA from the output, the LDO adds 1.25 % overhead to the standby budget.