The MD85A40PA1 with SOT89-3L Linear Voltage Regulators (LDO) ROHS is a three-lead surface mount device designed and manufactured by Mingda. This device is a low dropout, low power, positive linear voltage regulator. This device has an operating input voltage range of 4.2V to 40V and a fixed output voltage of 5V with a maximum output current of 0.85A. The device provides excellent line and load regulation, and it has near zero dropout voltage and low output voltage ripple. This device also features short circuit protection, over current protection, and thermal protection. The device is RoHS compliant, meeting the requirements of hazardous substances under the European Union's RoHS regulation.