TL499ACP..

The TL499ACP is a Wide-range Power-Supply Controller designed to provide a wide range of adjustable regulated supply voltages. The regulated output voltage can be varied from 2.9 to 30V by adjusting two external resistors. When the TL499A is AC-coupled to line power through a step-down transformer, it operates as a series DC voltage regulator to maintain the regulated output voltage. The adjustable regulated output voltage makes the TL499A useful for a wide range of applications. Providing backup power during an ac-line failure makes the TL499A extremely useful in microprocessor memory applications.