Intersil takes on Dialog in smartphone power management

Intersil takes on Dialog in smartphone power management

Business news |
By Nick Flaherty

The latest PMIC uses Intersil’s R5 modulation technology to provide fast single-cycle transient response and programmable switching up to 4MHz during load transients nd measures 2.51mm x 3.61mm in a 54-ball WLCSP package. Coupled with low RDS(on) MOSFETs, this allows designers to use fewer low-profile external components for a supply measuring 50mm2, which Intersil says is up to 40% smaller than competing solutions. 

The move comes as Dialog was names as a preferred automotive power management supplier for Intersil’s parent, Renesas. 

Like Dialog’s devices which are used in Samsung and Qualcomm smartphones, Intersil’s triple and quad output PMIC is aimed at for smartphones, tablet computers, solid-state drives, networking and wireless Internet of Things (IoT) devices powered by single-cell Lithium-ion (Li-on) batteries, or 2.5V – 5.5V power supplies.

One of the key factors is that it has a 91% efficiency at 1.1V output voltage with a quiescent current is only 62μA while regulating the output voltage, improving battery life.

The wafer scale PMIC includes highly efficient synchronous buck converters capable of multiphase and single-phase operation while delivering up to 5A per phase of continuous output current and four integrated buck controllers dynamically reconfigure their power stages to address a wide range of applications with high efficiency and high output power. Precise current sensing allows the device to automatically and smoothly add or drop phases to optimize power efficiency, and provide overcurrent protection without requiring DCR or resistor sensing circuits at the inductor.

“The latest generation of application processors requires a new PMIC modulation architecture that can dramatically shrink solution size and increase efficiency,” said Andrew Cowell, senior vice president of Mobile Power Products at Intersil. “The ISL91211 employs Intersil’s new R5 modulator to deliver fast transient performance and everything designers need to simplify board layout and dynamically scale power supply performance to meet the requirements of today’s multi-core processors.”

Next: product details

The ISL91211 PMIC comes in two factory configurable options, with four-phase, three output rails configured as 2+1+1 phase, or four-phase, four output rails configured as 1+1+1+1 phase. The devices can be combined with Intersil ISL91127 high efficiency buck-boost regulators to provide application processor and subsystem peripheral rails for battery-operated products. It ships for $3.90 in 1k quantities. 

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