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Intersil claims first USB-C buck-boost voltage regulator

Intersil, a subsidiary of Renesas Electronics, presented the industry’s first buck-boost voltage regulator for tablets, ultrabooks, power banks, and other mobile devices using the reversible USB Type-C connector. The ISL95338 bidirectional voltage regulator accepts input power from a wide range of DC power sources and converts it to a regulated voltage up to 24V. The ISL95338 can also convert a wide range of DC power sources to a regulated 20V at its power adapter input, and supports the USB-C ecosystem with buck-mode, boost-mode, and buck-boost mode, and is flexible enough to use in any USB-C power management application.

The single-chip device replaces two voltage converters, currently used for bidirectional buck and boost modes, to reduce a customer’s bill of materials (BOM) cost significantly, leveraging R3 modulation technology for acoustic noise-free operation, superior light-load efficiency, and ultra-fast transient response. It also extends battery life, by combining the best of fixed-frequency and hysteretic PWM to maximize power efficiency. The USB 3.1-compliant chip provides serial communication through SMBus/I2C, allowing designers to program several input/output current and voltage slew rate settings to create a customized solution.

The ISL95338 supports programmable power supply fast charging with bidirectional 5V to 20V buck, boost or buck-boost modes. Multiple ICs can be combined with the ISL95521A combo battery charger or ISL9238 buck-boost battery charger to enable simultaneous multiport USB-C charging. The ISL95338 can also be used with the R9A02G011 USB PD controller and RAJ240045 fuel gauge IC for a complete USB-C power delivery solution. The ISL95338 buck-boost voltage regulator is available now in a 4mm x 4mm TQFN package and is priced at $3.36 USD in 1k quantities.

For more information on the ISL95338, visit www.intersil.com/products/isl95338

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