The document describes the features and characteristics of the TPS794xx family of low-dropout (LDO) linear voltage regulators, including high power-supply rejection ratio (PSRR), ultralow noise, fast start-up, and excellent line and load transient responses. The family is available in small outline MSOP-8 PowerPAD and SOT223-6 packages, and each device is stable with a small 2.2-µF ceramic capacitor on the output. Available models include 1.8 V, 2.5 V, 2.8 V, 3 V, 3.3 V, and adjustable (1.2 V to 5.5 V).
The TPS794xx family are 250‑mA low‑dropout linear regulators with enable control, available in fixed output versions (1.8 V, 2.5 V, 2.8 V, 3 V, 3.3 V) and an adjustable version (1.2 V‑5.5 V). They feature high PSRR (60 dB at 10 kHz), ultralow output noise (32 µV rms for TPS79428) and fast start‑up (≈50 µs).
The devices are offered in MSOP‑8 and SOT223‑6 packages and are specified for input voltages from 2.7 V to 5.5 V, continuous output current up to 250 mA, and typical dropout voltages as low as 155 mV. Detailed electrical characteristics, thermal ratings, and mechanical dimensions are provided.
| Input voltage range | 2.7 V – 5.5 V |
|---|---|
| Continuous output current | 250 mA |
| UVLO threshold | 2.25 V – 2.65 V |
| Available packages | MSOP‑8, SOT223‑6 |
The regulators can deliver up to 250 mA continuously.
They are available in MSOP‑8 and SOT223‑6 surface‑mount packages.
Typical dropout voltage is about 155 mV at full load.
The EN pin enables the regulator when driven high and shuts it down when driven low.