DC/DC Converter ICs feature 1.2 MHz oscillation frequency.

Press Release Summary:

Series S-8550/8551 is CMOS synchronous rectification, step-down switching regulator that includes reference voltage circuit, oscillator, error amplifier, phase compensation circuit, PWM controller, under voltage lockout circuit (UVLO), current limit circuit, and power MOSFET. Offered in different pin configurations, dexice is suited for mobile phones, Bluetooth devices, wireless devices, audio players, digital still cameras, and portable DVD/CD players.

Original Press Release:

Seiko Instruments Announces S-8550/8551 Series


The S-8550/8551 Series is a CMOS synchronous rectification step-down switching regulator which mainly consists of a reference voltage circuit, an oscillator, an error amplifier, a phase compensation circuit, a PWM controller, an under voltage lockout circuit (UVLO), a current limit circuit, and a power MOS FET.

The oscillation frequency is high at 1.2 MHz, so a high efficiency, large output current, step-down switching regulator can be achieved by using small external parts.

The built-in synchronous rectification circuit makes achieving high efficiency easier compared with conventional step-down switching regulators. A ceramic capacitor can be used as an output capacitor. High-density mounting is supported by adopting a small SOT-23-5 package.

The S-8550 and S-8551 Series are offered according to different pin configuration.

Applications include:

Mobile devices, such as mobile phones, Bluetooth devices, wireless devices, digital audio players, digital still cameras, portable DVD players, and portable CD players

Pricing at $.52 each at 10,000 pieces

More information...

About Seiko Instruments USA, Inc.:

Seiko Instruments USA, Inc. semiconductor technology originated with the integrated circuits used in Seiko watches, which required ultra-low power consumption coupled with precision performance, high processing accuracy, and top quality. Seiko Instruments has since adapted the basic CMOS technology to create a line of standard products for energy management and conservation. These ICs feature the lowest current consumption available to provide the longest battery life or the most energy-efficient operation for line operated equipment.

Seiko Instruments is totally committed to providing the highest quality semiconductors to enhance the value of its customers' end products. Seiko Instruments' IC products include: Switching Regulators, Voltage Detectors, Single Gate Logic ASSPs, LowDropOut (LDO) Voltage Regulators, Real time Clocks, Temperature sensors, Low Voltage EEPROMs, Operational Amplifiers, Comparators, Charge Pumps, and Lithium-ion Battery Protection ICs.

Seiko Instruments USA
Jim Schlumpberger, Product Manager

Seiko Instruments USA
2990 W. Lomita Blvd.
Torrance, CA 90505


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