The L7800A series of three-terminal positive regulators is available in TO-220 and D2PAK packages and several fixed output voltages, making it useful in a wide range of applications.These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustablevoltages and currents.
The L7800AB/AC series are three‑terminal positive linear regulators offered in TO‑220 and DPAK packages with fixed output voltages of 5 V, 6 V, 8 V, 9 V, 12 V, 15 V, 18 V, 20 V and 24 V. They provide up to 1 A output current, internal current limiting, thermal shutdown and safe‑area protection, making them robust for a wide range of applications.
The document includes absolute maximum ratings, thermal resistance data, electrical characteristics for each voltage version, mechanical dimensions for the DPAK package, and ordering information. It also contains typical application circuits, test setups, and regulatory notices.
| Output voltage tolerance | 2 % |
|---|---|
| Maximum input voltage (5‑18 V outputs) | 35 V |
| Maximum input voltage (20‑24 V outputs) | 40 V |
| Dropout voltage at 1 A | 2 V |
Each device includes internal current limiting, thermal shutdown, and safe‑area (SOA) protection.
The dropout voltage is specified as 2 V when the regulator supplies 1 A.
Fixed output versions are offered at 5 V, 6 V, 8 V, 9 V, 12 V, 15 V, 18 V, 20 V and 24 V.