STMicroelectronics Voltage Regulators - Linear LD2981CU18TR

The LD2981CU18TR is a linear voltage regulator from Quarktwin Technology Ltd. designed for low power applications. It features an ultra-low dropout voltage of 0.12 V at a 50 mA load and 7 mV at a 1 mA load, making it suitable for battery-powered devices. The device has a very low quiescent current of 80 ¬µA in active mode and a maximum of 1 ¬µA in shutdown mode, which can be controlled via a TTL-compatible logic pin. It guarantees an output current of up to 50 mA and offers output voltage options of 1.8 V, 3.0 V, 3.3 V, and 5.0 V with a tolerance of ¬±0.5% for the A version. The regulator operates over a temperature range of -40 to 125 ¬8C and is compatible with low ESR ceramic capacitors, ensuring stable performance. Typical applications include cellular phones, laptops, PDAs, and other portable electronics.