January 25, 2008 -- Intersil Corp. today announced a new family of triple sync buck PWM and LDO controller. The ISL9440, ISL9440A and ISL9441 are designed to be extremely flexible, operating in a wide input voltage range of 4.5V to 24V, and they offer an independent "digital enable" feature that lets designers save power and board space.
The digital enable feature on the controllers affords "green" power savings by offering the ability to shut down device rails that are not in use. The digital enable features on the ISL9440, ISL9440A and ISL9441 controllers can also be logic-driven for sequencing to avoid using additional chips, saving cost and board space. In addition, the digital enable feature provides better control for sequencing on power rails than standard analog soft-start.
All three members of this new family of triple sync buck controllers help control noise within the system by offering out-of-phase switching to minimize spikes.
For system and data safety, the ISL9440 and ISL9440A feature an early warning VIN detection feature that allows 5.5µs for the system to perform functions like writing key registers to memory before the system loses power completely.
For customers with certain specific 5V applications, the ISL9441 without early warning VIN can be selected.
Pricing and Availability
Each of the new ICs is available now in a 32-ld QFN package and priced at $4.67 each in 1,000-unit quantities.
Go to the Intersil Corp. website to find additional information.