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Power combo aimed at 2-in-1s, ultrabooks, tablets

Posted: 29 Sep 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Intersil? ultrabook? tablet? PMIC? battery charger?

Intersil Corp. has uncloaked the ISL95852 highly integrated power management IC (PMIC) and the ISL95521 battery charger as its latest power saving solutions for 2-in-1s, ultrabooks and tablets. Both devices meet Intel's IMVP8 specifications to support its "Skylake" 6th Gen Intel Core processors.

The ISL95852 and ISL95521 leverage Intersil's patented R3 modulation technology, which claims to deliver best-in-class light load efficiency, superior regulation accuracy and fast dynamic response, resulting in better system power management and longer battery life.

The ISL95852 is the industry's most integrated Vcore PMIC for IMVP8 platforms. Its 4mm x 4mm size and high switching frequency enable the use of small external inductors and capacitors to reduce board space by 50 per cent compared to discrete solutions, stated the company. The ISL95852 integrates control, MOSFET drivers, power MOSFETs and fault monitoring and protection for three synchronous buck switching regulators. These high-efficiency voltage regulators convert system voltage from a battery or AC adapter into three voltage rails required for the core processor, graphics processor and system agent. The ISL95852's programmable switching frequency is 2x faster than competitive solutions and is adjustable up to 1.3MHz during load transients.

ISL95852 and ISL95521

The ISL95521 claims to be the industry's first Hybrid Power Boost (HPB) and Narrow VDC (NVDC) combination battery charger. Its charge current accuracy of 1.2 per cent is four times higher than competing solutions, and extends battery run-time while enabling faster system test and calibration for improved manufacturing yields, noted Intersil. The ISL95521 combo battery charger is pin-configurable for HPB or NVDC mode, eliminating the need for circuit redesigns. Both configurations support 2-cell to 4-cell Li-ion batteries as well as system turbo-boost-mode, which helps the battery and AC adapter work together to supply the system load when it exceeds the adapter's capability. The HPB charger configuration reverse boosts battery energy to the system bus in turbo mode, while the NVDC charger quickly turns on the battery BGATE to help the adapter deliver system power.

Intersil's total IMVP8-compliant power management solution, which also includes the ISL95908 peripheral PMIC, powers up the CPU/GPU, battery pack and subsystem peripherals: flash memory, USB, HDMI, audio, sensors, camera module and WiFi.

The ISL95852 PMIC is available in a 4mm x 4mm, 64-bump WLCSP package and is priced at $6.99 in 1k quantities. The ISL95521 HPB/NVDC combo battery charger is available in a 4mm x 4mm, 32-lead QFN package and priced at $2.49 in 1k quantities.

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