TS39300/1/2/3/4 are 3A ultra low dropout linear voltage regulators that provide low voltage, high current output with a minimum of external components. The TS3930x series offers extremely low dropout (typically 400mV at 3A) and low quiescent current (typically 36mA at 3A). TS39300/1/2/3/4 is ideal for PC add-in cards that need to convert from standard 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the TS39300/1/2/3/4 to provide 2.5V from a supply as low as 3V, and 1.8V from a supply as low as 2.5V. The TS39300/1/2/3/4 also has fast transient response for heavy switching applications. The device requires only 47uF of output capacitor to maintain stability and achieve fast transient response. On the TS39300/1/2/3/4, the enable pin may be tied to input voltage if it is not required for enable control.
The TS39300/1/2/3/4 family provides 3 A ultra‑low dropout linear voltage regulators that operate from a wide input range and require minimal external components. Typical dropout is 0.4 V at full load and quiescent current is about 36 mA, making them suitable for high‑efficiency power supplies and battery‑powered equipment.
The devices include features such as an active‑high enable pin, optional error‑flag output (TS39301), adjustable output versions (TS39302), and sense pins for output voltage monitoring. Various TO‑220 and TO‑263 package options are offered, and thermal performance data and mechanical drawings are provided for proper heat‑sink design.
| Typical dropout voltage | 0.4 V @ 3 A |
|---|---|
| Quiescent current (typical) | 36 mA @ 3 A |
| Operating input voltage range | +2.25 V to +16 V |
| Enable voltage rating | Up to +20 V |
| Thermal resistance (TO‑220) | 80 °C/W |
| Minimum load current | 10 mA |
| Recommended output capacitor ESR | < 2 Ω |
| Recommended input capacitor | ≥ 1 µF |
| Package options | TO‑220, TO‑263, TO‑220‑5L, TO‑263‑5L |
The typical dropout voltage is about 0.4 V when delivering 3 A.
Yes, the TS39301 version provides an open‑collector error‑flag output that indicates fault conditions.
The output capacitor should have an ESR of less than 2 Ω for stable operation.