The SPX29300/01/02/03 are 3A, highly accurate voltage regulators with a low dropout voltage of 450mV dropout (typical) @ 3A. These regulators are specifically designed for low voltage applications that require a low dropout voltage and a fast transient response. They are fully fault protected against over-current, reverse battery, and positive and negative voltage transients.
The SPX29300/01/02/03 family provides 3 A high‑current, low‑dropout voltage regulation in both fixed‑output (1.8 V, 2.5 V, 3.3 V, 5.0 V) and adjustable versions (1.25 V‑16 V). Features include 1 % output accuracy, 450 mV typical dropout at 3 A, tight line and load regulation, fast transient response, reverse‑battery protection, and an optional error‑flag output.
Typical applications are low‑voltage computer power supplies, VGA and sound‑card power, SMPS post‑regulation, battery chargers, and constant‑current regulators. The devices are offered in 3‑pin and 5‑pin TO‑220 and TO‑263 packages with detailed pin‑outs and ordering information.
| Maximum Output Current | 3 A |
|---|---|
| Typical Dropout Voltage (3 A) | 450 mV |
| Enable Input High Threshold | 2.4 V |
| Enable Pin Quiescent Current | ≈20 µA |
| Error Flag Output Current | 10 mA (sinks when fault) |
The typical dropout voltage is 450 mV when delivering 3 A.
It protects against over‑current, reverse‑battery insertion, over‑temperature operation, and both positive and negative transient voltages.