AEC-Q100 qualified 5V LDO for automotive power rails
The Texas Instruments TPS76750QPWPRQ1 is a single-output, positive-voltage LDO regulator delivering a fixed 5V output at up to 1A. It is qualified to AEC-Q100, making it suitable for automotive power-management applications including ECU supply rails, sensor bias, and ADAS module local regulation. The device integrates enable and reset control features, plus protection against over-current, over-temperature, and reverse polarity.
Dropout and quiescent current — what they mean for the 5V rail
Maximum dropout voltage is 0.38V at 1A output. With a 5V output, the input must stay above about 5.4V to maintain regulation at full load — a margin that matters during automotive cold-crank events where the battery bus can sag below 6V. Quiescent current is 125 µA, a reasonable figure for a 1A LDO; it keeps the load on the always-on battery line modest when the system is in standby but the regulator stays enabled. PSRR is specified at 60dB at 1kHz. This gives about 1 mV ripple rejection per volt of input ripple at that frequency, which is adequate for cleaning up a switching pre-regulator feeding a 5V analog or logic rail in an automotive module.
Package and temperature range for under-hood deployment
The device is offered in a 20-pin HTSSOP (PowerTSSOP) package with an exposed thermal pad. The operating temperature range is -40°C to 125°C, covering the full automotive under-hood and cabin environment. Surface-mount assembly is standard; the thermal pad should be soldered to a PCB copper plane for adequate heat dissipation at 1A continuous load.
Lifecycle and sourcing — active production, no LTB risk
The TPS76750QPWPRQ1 is listed as Active in production status.