Description:

The TPS746-Q1 is a 1-A ultra-low-dropout regulator (LDO) with a power-good indicator. The device is available in a small 6-pin 2-mm × 2-mm WSON package with wettable flanks and a small 8-pin 3-mm × 3-mm VSON package for optical inspection. The TPS746-Q1 features low quiescent current consumption and provides fast line and load transient performance. The TPS746-Q1 supports an input voltage range of 1.5 V to 6.0 V and an externally adjustable output voltage range of 0.55 V to 5.5 V, making it a flexible post-regulation device. The device also offers fixed output voltages to supply common voltage rails. The TPS746-Q1 has a power-good (PG) output that monitors the feedback pin voltage to indicate the output voltage status. The EN input and PG output can be used to sequence multiple power supplies in a system. The TPS746-Q1 remains stable when paired with small ceramic output capacitors that support a small overall solution size. The precision bandgap and error amplifier feature high accuracy, providing ±0.85% (max) accuracy at 25°C and ±1.5% (max) accuracy over the full operating temperature range. The device includes integrated thermal shutdown, current limiting, and undervoltage lockout (UVLO) functions. The TPS746-Q1 features an internal foldback current limit that helps reduce thermal dissipation during a short circuit.

Features:

• AEC-Q100 qualified for automotive applications: – Temperature grade 1: –40°C to +125°C, TA

• Device operating junction temperature range: – –40°C to +150°C

• Package: – 2-mm × 2-mm wettable-flank WSON package – 3-mm × 3-mm wettable-flank VSON package

• Input voltage range: 1.5 V to 6.0 V

• Output voltage range: – Fixed voltage: 0.65 V to 5.0 V – Adjustable voltage: 0.55 V to 5.5 V

• High PSRR: 38 dB at 100 kHz

• Output accuracy: ±0.85% typical, ±1.5% maximum

• Power-good status output options: – Open-drain or push-pull

• Ultra-low dropout: – 265 mV (max) at 1 A (3.3 VOUT)

• Stable with 1-µF or larger capacitors

• Low IQ: 25 μA (typical)

• Active output discharge

• Functional safety-capable – Documentation available for functional safety system design

• Low thermal resistance: – DRV (6-pin WSON), RθJA = 80.3°C/W – DRB (8-pin VSON), RθJA = 55.5°C/W

Applications:

• Automotive head units

• Front and rear cameras

• Automotive cluster displays

• Telematics control units

• Mid-range and short-range radar