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.
The L7800AB/AC series are three‑terminal positive linear regulators offered in TO‑220 and DPAK (TO‑263) packages. They deliver up to 1 A of output current with internal current limiting, thermal shutdown and safe‑area protection, making them suitable for on‑card regulation in many applications.
The datasheet lists absolute maximum ratings, thermal characteristics, electrical specifications for each fixed output voltage (5 V to 24 V), mechanical dimensions, and ordering information. Key features include low dropout voltage, low output noise, and robust protection against overload and short‑circuit conditions.
| Output Voltage Options | 5 V, 6 V, 8 V, 9 V, 12 V, 15 V, 18 V, 20 V, 24 V |
|---|---|
| Maximum Input Voltage | 35 V (Vo 5‑18 V), 40 V (Vo 20‑24 V) |
| Output Current | Internally limited to 1 A |
| Power Dissipation | Internally limited |
| Dropout Voltage (Ib=1 A, 25 °C) | 2 V |
| Quiescent Current (typical, 25 °C) | 6 mA |
| Supply Voltage Rejection (120 Hz) | 68 dB |
| Short‑Circuit Current | 0.2 A |
| Output Voltage Drift | -1.1 mV/°C |
The maximum input voltage is 35 V for output voltages from 5 V to 18 V, and 40 V for the 20 V and 24 V versions.
Each regulator includes internal current limiting, thermal shutdown, and safe‑area (SOA) protection.
They are offered in TO‑220 and DPAK (TO‑263) surface‑mount packages.
The typical quiescent current is about 6 mA at 25 °C.