The L7900AC series is a three-terminal negative regulator with an output current of up to 1.5A and fixed output voltages of -5, -5.2, -6, -8, -12, -15, -18, -20, -22, -24V. These regulators have features such as thermal overload protection, short circuit protection, and output transition SOA protection. They are suitable for local on-card regulation and split power supplies.
The L7900AC series provides fixed‑output negative regulators in TO‑220 and DPAK packages, delivering up to 1.5 A of output current. They are suited for split‑power supplies and can replace single‑point regulation on a board, with options matching the positive L7800A series.
The document lists absolute maximum ratings, thermal data, ordering numbers, detailed electrical characteristics for each voltage version, application circuits, and mechanical dimensions. It also includes standard protection features such as thermal overload, short‑circuit, and output‑transition SOA protection.
| Output voltage options | -5, -5.2, -6, -8, -12, -15, -18, -20, -22, -24 V |
|---|---|
| Maximum output current | 1.5 A |
| Thermal resistance (junction‑to‑ambient) | 62.5 °C/W (max) |
| Quiescent current | 3 mA (typical) |
The series provides thermal overload protection, short‑circuit protection, and output‑transition SOA protection.
The typical quiescent current is 3 mA at a junction temperature of 25 °C.
The L7900AC series can deliver up to 1.5 A of output current when adequate heat sinking is provided.