Analog Devices introduces new buck-boost regulators

Sep 01, 2008 (Datamonitor via COMTEX) -- ADI | Quote | Chart | News | PowerRating -- Analog Devices, a provider of semiconductors for signal-processing applications, has introduced buck-boost regulators, which support switching frequencies at speeds up to 2.5 MHz.

According to the company, the newly introduced buck-boost regulators are designed to regulate voltages above and below the battery output voltage in portable electronics, Analog Devices's ADP2503 and ADP2504 step-up/step-down dc-to-dc regulators incorporate a patent-pending architecture that delivers mode transitions. The 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.

The ADP2503 and ADP2504 regulators are based on the company'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.

Analog Devices claim that 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.

Arcadio Leon, marketing director of portable power products at Analog Devices, said: "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."

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