Intersil Unleashes Industry's First Digital Multiphase PWM Controllers with AVSBus and Synthetic Current Control

Complete controller and smart power stage solution delivers up to 450A load to any processor, ASIC or FPGA, making IoT and cloud infrastructure greener

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Intersil Corporation

Oct 31, 2016, 08:05 ET

MILPITAS, Calif., Oct. 31, 2016 /PRNewswire/ -- Intersil Corporation (NASDAQ: ISIL), a leading provider of innovative power management and precision analog solutions, today announced 12 new digital multiphase controllers and a companion smart power stage, including the industry's first digital solution with an Adaptive Voltage Scaling Bus (AVSBus™). The new digital controllers provide up to seven phases assignable in any combination across two outputs, and combine with smart power stages to provide a scalable solution from 10A to 450A. The result is enhanced power optimization and more energy-efficient networking and communications infrastructure equipment.

Intersil's ISL681xx and ISL691xx digital multiphase controllers provide up to seven phases assignable in any combination across two outputs, and combine with smart power stages to deliver up to 450A to any processor, ASIC or FPGA.

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AVSBus joins the PMBus™ v1.3 specification and features a 50MHz high-speed bus that connects directly to the processor to communicate telemetry data and deliver efficiency savings through adaptive voltage positioning. Intersil's new DC/DC controllers and ISL99227 60A smart power stage support demanding CPU core voltages, memory, and auxiliary power rails, enabling power designers to customize their solution to meet any rail requirements. Watch a video on this digital multiphase power solution.

The digital multiphase family is comprised of three groups of controllers. The ISL68137 and ISL68134 controllers utilize the AVSBus to power and communicate with ARM-based processors in network routers, switches, servers, storage, and wireless telecom equipment. Two general-purpose controllers (ISL68127 and ISL68124) power network processors, FPGAs, SoCs and graphics accelerators. And eight controllers (ISL69147/44, ISL69137/34, ISL69128/27 and ISL69125/24) add a secondary high-speed interface (SVID or SVI2) to power the latest Intel and AMD processors in cloud computing applications that make up the Internet of Things (IoT) backbone.

The ISL681xx and ISL691xx controllers integrate a high performance digital engine featuring a patented synthetic current control architecture that tracks each phase current with zero latency. This allows the device to respond to any load transient with precise current and voltage positioning, and 30% less capacitance than competitive devices. Synthetic current control also makes it possible to develop high reliability systems using all ceramic capacitors.

Engineers are able to realize the flexibility and benefit of digital control through Intersil's easy to use PowerNavigator™ GUI software tool. PowerNavigator connects to development boards communicating across PMBus and AVSBus, allowing engineers to set up and control all parameters, optimize efficiency via precise current thresholds for adding/dropping phases, and adjust the loop tuning. PowerNavigator eliminates board rework as designs are completed with on the fly changes for stability tuning and optimization. The final configuration is simply stored to non-volatile memory.

"Our comprehensive family of digital multiphase solutions represents another breakthrough in size and flexibility while meeting the needs of any advanced digital load," said Mark Downing, senior vice president of Infrastructure and Industrial Power products at Intersil. "They deliver the efficiency and best-in-class transient and thermal performance our customers' next-generation IoT and cloud computing systems require."

Key Features and Specifications of ISL681xx and ISL691xx Controllers

PMBus 1.3 and AVSBus compliant
- Telemetry for Vin, Vout, input/output current, and temperature diagnostic fault reporting with black box capability
- ISL68137 and ISL68134 include AVSBus interface for adaptive voltage scaling
Proprietary digital control scheme with patented synthetic current control
- Full bandwidth, zero latency current waveforms digitized per phase
- Fast transient response supporting minimal output capacitance, including all MLCC
Flexible phase configuration
- Configurable PWMs, ability to assign phases to any output (X+Y)
- Allows solution to be scaled in current from 10A to 450A
Power Stage Support
- Supports ISL99227 60A smart power stage with integrated current sensing
- Supports ISL6617A phase doubler for extending to 14 phase operation
Intuitive setup, control and monitoring via PowerNavigator GUI
- Cycle by cycle current protection with average and peak thresholds
- Autonomous auto phase dropping (APD) with adjustable current thresholds
- Output and input over-voltage and under-voltage protection

Key Features and Specifications of ISL99227 60A Smart Power Stage

Input voltage range of 4.5V to 18V
60A current capability with 25V rated synchronous FETs
Integrated current sensing, 3% accuracy across line, load and temperature
Differential current reporting at 5mV/A eliminating DCR error and noise
3.3V compatible tri-state PWM input
Integrated temperature sensing with fault monitoring
High side FET over-current protection

Pricing and Availability
The ISL681xx and ISL691xx digital multiphase controllers and ISL99227 smart power stage are available now, with detailed controller pricing in the table below. The ISL99227 smart power stage is supplied in a 5mm x 5mm, 32-lead QFN package and is priced at $5.21 USD in 1k quantities. Development boards are also available to help engineers scale power supply performance and select connectivity requirements for rapid prototyping and development.

Dual Output Device	Interface Version	Output Phase Configuration	Package	Price $USD (1k units)
ISL68137	PMBus/AVSBus	X+Y= 7	6mm x 6mm, 48-L QFN	$5.30
ISL68134	PMBus/AVSBus	X+Y= 4	5mm x 5mm, 40-L TQFN	$4.10
ISL68127	PMBus	X+Y= 7	6mm x 6mm, 48-L QFN	$4.98
ISL68124	PMBus	X+Y= 4	5mm x 5mm, 40-L TQFN	$3.85
ISL69147	AMD SVI2	X+Y= 7	6mm x 6mm, 48-L QFN	$4.35
ISL69144	AMD SVI2	X+Y= 4	5mm x 5mm, 40-L TQFN	$2.78
ISL69137	IMVP8 SVID	X+Y= 7	6mm x 6mm, 48-L QFN	$3.24
ISL69134	IMVP8 SVID	X+Y= 4	5mm x 5mm, 40-L TQFN	$2.78
ISL69128	VR13/IMVP8	X+Y= 7	6mm x 6mm, 48-L QFN	$4.98
ISL69127	VR13 SVID	6+1 = 7	6mm x 6mm, 48-L QFN	$4.35
ISL69125	VR13 SVID	X+Y= 4	5mm x 5mm, 40-L TQFN	$3.55
ISL69124	VR13 SVID	X+Y= 4	5mm x 5mm, 40-L TQFN	$3.55

About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products form the building blocks of increasingly intelligent, mobile and power hungry electronics, enabling advances in power management to improve efficiency and extend battery life. With a deep portfolio of intellectual property and a rich history of design and process innovation, Intersil is the trusted partner to leading companies in some of the world's largest markets, including industrial and infrastructure, mobile computing, automotive and aerospace. For more information about Intersil, visit our website at www.intersil.com.

Intersil, PowerNavigator and the Intersil logo are trademarks or registered trademarks of Intersil Corporation. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners.

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SOURCE Intersil Corporation