Fixed-output buck regulator delivers >80% efficiency at 1 mA
The FAN5358 step-down switching voltage regulator delivers a fixed output from an input voltage supply of 2.7 to 5.5 V. Using a proprietary architecture with synchronous rectification, the device delivers 500 mA and maintains >80% efficiency at load currents as low as 1 mA. At moderate and light loads, it uses pulse frequency modulation to operate the device in power-save mode, consuming 25-µA typ quiescent current. Even with such a low quiescent current, the device provides excellent transient response during large load swings. Additionally, in shutdown mode, the supply current drops below 1 µA.
The 2-MHz synchronous buck regulator is available in a six-lead SC70 package to simplify the manufacturing processes. The device is ideal for applications in cell phones, smart phones, and 3G/4G data cards, as well as tablets, ultramobile PCs, and Netbooks. ($0.39 ea/1,000 — available now.)
Fairchild Semiconductor , South Portland , ME
Sales 207-775-8100
http://www.fairchildsemi.com
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