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Intersil unveils USB-C buck-boost voltage regulator

Intersil, a subsidiary of Renesas Electronics, has unveiled a 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: AC/DC power adapters, USB power delivery (PD3.0) ports, travel adapters, power banks–and converts it to a regulated voltage up to 24V. It can also convert a wide range of DC power sources to a regulated 20V at its power adapter input.

The ISL95338 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 ISL95338 looks to replace the two voltage converters currently used for bidirectional buck and boost modes and could help to reduce a customer’s bill of materials (BOM) cost by as much as 50%.

It leverages Intersil’s patented R3 modulation technology to deliver acoustic noise-free operation, superior light-load efficiency and ultra-fast transient response. Intersil’s R3 extends battery life by combining fixed-frequency pulse width modulation (PWM) and hysteretic PWM to maximise power efficiency.

The ISL95338 is also USB 3.1-compliant and provides serial communication through SMBus/I2C, allowing designers to program several input/output current and voltage slew rate settings to create a customised solution.

The ISL95338 is fully compliant to the USB PD3.0 standard and supports programmable power supply (PPS) fast charging with bidirectional 5V to 20V buck, boost or buck-boost modes. Multiple ISL95338 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.

Author
Neil Tyler