HIGHLY INTEGRATED STEP-DOWN DC-TO-DC SYNCHRONOUS REGULATOR WITH INTERNAL COMPENSATION SIMPLIFIES POINT-OF-LOAD POWER DESIGN

- ADP2118 high accuracy, switching regulator with tracking and synchronization provides power conversion efficiencies up to 96 percent.

Norwood, MA (08/05/2009) - Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal-processing applications, today introduced the ADP2118 dc-to-dc switching regulator, the latest in its portfolio of integrated power management switching regulators. The new highly integrated 3A, step-down, dc-to-dc synchronous regulator includes low on-resistance switching FETs (field-effect transistors) to maximize efficiency and features internal loop compensation, a power-good indicator, precision enable, tracking, and synchronization to simplify design of point-of-load power systems. The ADP2118 is designed to support high-performance signal-chain loads in applications ranging from medical devices to communications infrastructure equipment where the signal chain may include ADCs (analog to digital converters), DACs (digital-to-analog converters), precision amplifiers and other high-performance, submicron ICs such as DSPs (digital signal processors) and FPGAs (field programmable gate arrays).

“For the design engineer with less time to spend on designing a highly efficient point-of-load power supply, the ADP2118’s internal compensation, high level of integration, and the availability of online ADIsimPower™ design tools, make it very easy to use,” said Laurence McGarry, product marketing manager, Analog Devices. “Our goal with this family of regulators is to solve challenging power problems like FPGA-core transient response, system-noise reduction, and thermal management in the same time it takes to design in a linear regulator. We want our customers get to market quickly with power-efficient designs.”

Based on a current-mode, fixed-frequency PWM (pulse-width modulation) architecture that provides excellent stability and transient response, the ADP2118 operates at high power-conversion efficiencies up to 96 percent. Under light loads the regulator can be configured to operate in PFM (pulse frequency modulation) to reduce light load losses.

When multiple ADP2118 regulators are used in a system, a simple, reliable start-up sequence can be implemented using the part’s power-good, enable and tracking features. ADP2118 devices can be synchronized to eliminate beat frequencies between converters and remove the possibility of audible system noise. The new regulator can be synchronized 180 degrees out of phase to reduce input-current ripple and the size of the input capacitance. The ADP2118 features a 600-kHz or 1.2-MHz fixed switching frequency and operates from a wide 2.3-V to 5.5-V range to accommodate a diversity of point-of-load applications. The output voltage of the ADP2118 is adjustable from 0.6 V to input voltage (VIN), and it is available in preset output voltage options of 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V. The new regulator draws less than 3 microamps from the input source when it is disabled.

The ADP2118 is well suited for establishing distributed low-noise analog rails to support other Analog Devices’ components like the latest generation of ADCs, amplifiers and DACs. The fast transient response and ease-of-use make this family perfect for powering FPGAs and Analog Devices’ Blackfin® and SHARC® Processors. Analog Devices’ integrated power management switching regulators are also supported by the ADIsimPower™ design tools, which makes selecting components, simulating power supply performance and building evaluation circuits easy and fast.

Availability and Pricing

Product
Samples
Availability
Output Options (A)
Junction Temperature Range
Price Each Per 1000
Packaging
ADP2118
Now
Now
3
−40°C to +125°C
$1.90
4 mm × 4 mm
16-lead LFCSP

For more information, visit http://www.analog.com/pr/ADP2118. For more information on ADI’s switching regulator portfolio, visit http://www.analog.com/switching-regulators.

Other Resources
Watch an in-depth, free webinar “Designing with Switching Regulators in High-Speed A/D Converter Applications,” by visiting http://www.analog.com/pr/switchingregulatorwebinar.

ADI in Power Management
Analog Devices brings world-class signal-processing prowess to a portfolio of innovative power-management ICs that complement high-performance signal-processing functions in a wide range of portable and fixed-power applications in consumer electronics, medical equipment, industrial and instrumentation, and communications infrastructure. By supporting signal-chain design requirements, such as dynamic range, transient performance, and reliability, ADI helps customers solve complex power challenges easily and quickly, differentiate their products, and get to market faster. Learn more about ADI's power-management ICs at http://www.analog.com/power.

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices is included in the S&P 500 Index.

ADIsimPower is a trademark; and Blackfin and SHARC are registered trademarks of Analog Devices. All other trademarks are the property of their respective owners.

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Editor's Contact Information:

Howard Wisniowski
781/937-1517

howard.wisniowski@analog.com

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