The World's Only
Flashlight Industry News Site

Analog Devices Introduces Compact
Buck-Boost Regulators

DC-to-DC converters provide seamless switching mode transitions and superior efficiency for portable applications

Analog Devices, Inc. Press Release - 9/2/2008
A -     A +

Click photo to enlarge

Analog Devices' ADP2503/4 buck-boost regulator

Analog Devices' ADP2503/4 buck-boost regulator

NORWOOD, Ma. - Analog Devices, Inc. (NYSE: ADI), a global leader in high-performance semiconductors for signal-processing applications, introduces one of the industry's smallest buck-boost regulators - and the first to support switching frequencies at speeds up to 2.5 MHz.

Designed to regulate voltages above and below the battery output voltage in portable electronics, ADI's ADP2503 and ADP2504 step-up/step-down dc-to-dc regulators incorporate a patent-pending architecture that delivers seamless mode transitions. The ultra-fast switching speed of the new regulators allows designers to use low-cost multilayer inductors that are half the size of other solutions. In addition, the total external component count has been reduced to three, resulting in a total PCB area of less than 13 mm² and a height of less than 1 mm, making the solution ideal for space constrained applications such as wireless handsets, digital still cameras, portable audio players and USB-powered consumer and industrial devices.

"Many lithium-battery-powered devices require voltage rails in the 2.8-V to 3.6-V range for RF, audio, or motor applications. The ADP2503 and ADP2504 are ideal regulators to provide these voltages when board area and efficiency are important," said Arcadio Leon, marketing director for portable power products, Analog Devices.

Proprietary Buck-Boost Architecture Results in Excellent Transient Performance and High Efficiency

The ADP2503 and ADP2504 regulators are based on ADI's new proprietary current-mode buck-boost architecture, achieving glitchless mode transitions and outstanding transient performance across line and load. This high level of output stability is critical for powering sensitive analog and digital circuitry. The devices also feature one of the industry's lowest no-load quiescent current (Iq) levels - 38 µA in power-save mode - which extends stand-by time in portable electronics and/or increases the power budget for the inclusion of additional features. The proprietary H-Bridge buck-boost architecture improves the efficiency by more than 10 percent versus legacy cascaded boost-buck architectures by reducing switching losses.

The ADP2503 and ADP2504 operate at input voltages ranging from 2.3 V and 5.5 V, which meets the requirements for single Li-Ion, Li-Ion polymer cell and multiple alkaline/NiMH cell applications. Fixed output voltages range from 2.8 V to 5 V.

Availability and Pricing

The ADP2503 and ADP2504 are available now in sample quantities and come housed in a 10-lead 3-mm x 3-mm thin LFCSP package. The buck-boost regulators are priced at $1.40 per unit in 1,000-unit quantities. For more information, visit and For more information on ADI's power management products, visit

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. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker "ADI" and is included in the S&P 500 Index.

For more information, visit the company's website at:

Search for other press releases about Buck-boost Regulators

Current FlashlightNews Headlines