The TC1108 is a low dropout linear regulator from Microchip Technology Inc. Its features include extremely low supply current (50µA), very low dropout voltage, 300mA output current, high output voltage accuracy, standard or custom output voltages, over current and over temperature protection. It can be used in battery operated systems, portable computers, medical instruments, instrumentation, cellular/GSM/PHS phones, linear post-regulators for SMPS, and pagers.
The TC1108 is a fixed‑output, high‑accuracy CMOS LDO regulator offering output currents up to 300 mA with typical supply current of only 50 µA. It features ultra‑low noise, very low dropout voltage, and integrated over‑current and over‑temperature protection, making it suitable for battery‑operated systems, portable computers, medical instruments, and other low‑power applications.
Key electrical specifications include selectable output voltages (2.5 V, 2.8 V, 3.0 V, 3.3 V, 5.0 V), dropout voltage ranging from 20 mV at 0.1 mA to 480 mV at 300 mA, line regulation of 0.05‑0.35 %, load regulation of 0.5‑2.0 %, and a PSRR of 60 dB below 1 kHz. The device is supplied in a 3‑pin SOT‑223 package and includes thermal shutdown at 150 °C.
| Maximum Output Current | 300 mA |
|---|---|
| Available Output Voltages | 2.5 V, 2.8 V, 3.0 V, 3.3 V, 5.0 V |
| Typical Supply Current | 50 µA |
| Dropout Voltage | 20‑30 mV (0.1 mA), 80‑160 mV (100 mA), 240‑480 mV (300 mA) |
| Line Regulation | 0.05 % – 0.35 % |
| Load Regulation | 0.5 % – 2.0 % |
| Power Supply Rejection Ratio (PSRR) | 60 dB @ <1 kHz |
| Output Noise | 260 µV rms @ 10 kHz, 1 nF |
| Package Type | 3‑Pin SOT‑223 |
The TC1108 can deliver up to 300 mA of output current.
Typical supply current is about 50 µA at full load.
The device includes over‑current and over‑temperature protection, with thermal shutdown at 150 °C.