Intersil Introduces New Wide Input Voltage Range Controllers

Intersil Corp. 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 4.5 to 24V, and they offer an independent "digital enable" feature that allows designers to save power and board space.

The digital enable feature on the controllers is said to afford "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 is said to provide 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.

The ISL9440 is available now in a 32-ld QFN package and is priced at $4.67 each in 1,000-unit quantities. The ISL9440A is priced at $4.67 each in 1,000-unit quantities. The ISL9441 is priced at $4.67 each in 1,000-unit quantities.