STMicroelectronics Voltage Regulators - Linear LDS3985M25R

The LDS3985M25R is a linear voltage regulator from Quarktwin Technology Ltd. designed to provide a stable output current of up to 300 mA with an input voltage range of 2.5 V to 6 V. It features a very low dropout voltage of 150 mV at 300 mA load and 0.4 mV at 1 mA load, making it suitable for low power applications and battery-powered systems. The device has a low quiescent current of 85 ¬µA at no load and 200 ¬µA at full load, with a maximum of 1.5 ¬µA in OFF mode, which contributes to overall energy efficiency. The LDS3985M25R is stable with low ESR ceramic capacitors and offers a fast turn-on time of approximately 240 ¬µs. It also includes logic-controlled electronic shutdown, internal current and thermal limit protection, and low output voltage noise of 30 ¬µ VRMS over a frequency range of 10 Hz to 100 kHz. The device operates within a temperature range of -40 ¬8C to 125 ¬8C, with an automotive-grade version available that operates from -40 ¬8C to 85 ¬8C. This regulator is particularly well-suited for applications in mobile phones and portable information appliances.