• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • Subscribe
  • Advertise

Power Electronic Tips

Power Electronic News, Editorial, Video and Resources

  • Products
    • Power Supplies
    • AC-DC
    • DC-DC
    • Battery Management
    • Capacitors
    • Magnetics
    • MOSFETS
    • Power Management
    • RF Power
    • Resistors
    • Transformers
    • Transistors
  • Applications
    • 5G
    • AI
    • Automotive
    • EV Engineering
    • LED Lighting
    • Industrial
    • IoT
    • Wireless
  • Learn
    • eBooks / Tech Tips
    • EE Training Days
    • FAQ
    • Learning Center
    • Tech Toolboxes
    • Webinars & Digital Events
  • Resources
    • Design Guide Library
    • Digital Issues
    • Engineering Diversity & Inclusion
    • LEAP Awards
    • Podcasts
    • White Papers
    • Design Fast
  • Video
    • EE Videos & Interviews
    • Teardown Videos
  • EE Forums
    • EDABoard.com
    • Electro-Tech-Online.com
  • Engineeering Training Days
  • Newsetter Subscription

PMIC delivers 91% efficiency at 1.1 V output voltage for space/power constrained systems

May 15, 2017 By Aimee Kalnoskas

Intersil, a subsidiary of Renesas Electronics Corporation, introduced a highly integrated programmable power management IC (PMIC) that delivers 91% efficiency at 1.1V output voltage for application processors, GPUs, FPGAs and high-performance system power. The new PMIC’s low RDS(on) MOSFETs and programmable PWM frequency allows designers to use fewer low-profile external components, enabling a 50mm2 power-supply that is 40% smaller than competing solutions. The ISL91211 triple/quad output PMIC is ideal 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.

The ISL91211 leverages Intersil’s latest R5™ modulation technology to provide the industry’s fastest single-cycle transient response and highest switching frequency (4MHz) during load transients. Quiescent current is only 62μA while the ISL91211 is regulating the output voltage. The PMIC’s superior light load efficiency, regulation accuracy and fast dynamic response prolong battery life.

The ISL91211 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. The PMIC’s 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 ISL91211 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 blazingly 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.”

Key Features and Specifications of ISL91211

·        Available in two factory configurable options:

    o   ISL91211A: four-phase, three output rails configured as 2+1+1 phase

    o   ISL91211B: four-phase, four output rails configured as 1+1+1+1 phase

·        5A maximum current per phase up to 20A with four phases

·        R5 modulator architecture balances current loads with smooth phase adding and dropping for power efficiency optimization

·        Automatic diode emulation mode for 91% efficiency at 1.1V output voltage

·        Less than 0.1uA quiescent current (Iq) when EN=0V, and 17uA when EN=3.7V

·        Independent dynamic voltage scaling for each output

·        Input voltage range of 2.5V to 5.5V

·        ±0.7% system accuracy; Output voltage remote sensing for accurate voltage regulation at the point-of-load

·        I2C and SPI programmable output from 0.3V to 2V

·        Soft-start and full protection against undervoltage, overvoltage, overcurrent, and overtemperature

The ISL91211A triple-output PMIC and ISL91211B quad-output PMIC can be combined with Intersil ISL91127 high-efficiency buck-boost regulators to provide application processor and subsystem peripheral rails for battery-operated products.

Filed Under: Power Management Tagged With: intersilcorporation, renesas

Primary Sidebar

Featured Contributions

Robust design for Variable Frequency Drives and starters

Meeting demand for hidden wearables via Schottky rectifiers

The case for vehicle 48 V power systems

GaN reliability milestones break through the silicon ceiling

Developing power architecture to support autonomous transportation

More Featured Contributions

EE LEARNING CENTER

EE Learning Center

EE TECH TOOLBOX

“ee
Tech Toolbox: 5G Technology
This Tech Toolbox covers the basics of 5G technology plus a story about how engineers designed and built a prototype DSL router mostly from old cellphone parts. Download this first 5G/wired/wireless communications Tech Toolbox to learn more!

EE ENGINEERING TRAINING DAYS

engineering
“power
EXPAND YOUR KNOWLEDGE AND STAY CONNECTED
Get the latest info on technologies, tools and strategies for EE professionals.
“bills

RSS Current EDABoard.com discussions

  • Diode recovery test Irrm timing.
  • Battery Deep Discharge – IC Workarounds?
  • The Analog Gods Hate Me
  • Safe Current and Power Density Limits in PCB Copper(in A/m² and W/m³) simulation
  • Why so few Phase shift full bridge controllers?

RSS Current Electro-Tech-Online.com Discussions

  • Wideband matching an electrically short bowtie antenna; 50 ohm, 434 MHz
  • The Analog Gods Hate Me
  • Simple LED Analog Clock Idea
  • PIC KIT 3 not able to program dsPIC
  • Parts required for a personal project

DesignFast

Component Selection Made Simple.

Try it Today
design fast globle

Footer

EE World Online Network

  • 5G Technology World
  • EE World Online
  • Engineers Garage
  • Analog IC Tips
  • Battery Power Tips
  • Connector Tips
  • DesignFast
  • EDA Board Forums
  • Electro Tech Online Forums
  • EV Engineering
  • Microcontroller Tips
  • Sensor Tips
  • Test and Measurement Tips

Power Electronic Tips

  • Subscribe to our newsletter
  • Advertise with us
  • Contact us
  • About us

Copyright © 2025 · WTWH Media LLC and its licensors. All rights reserved.
The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media.

Privacy Policy