Micrel's MIC2184 is a high efficiency PWM buck control IC with wide 2,9 to
14 V input range. It can be used to efficiently step voltages down in one or two-cell Li Ion battery-powered applications, as well as in fixed 3,3, 5 or 12 V systems. Efficiencies over 90% are achievable over a wide range of load conditions. Uses PWM control scheme. The operating frequency can be halved by raising the FREQ/2-pin to VDD allowing the user to optimise efficiency vs board space. The MIC2184 can be externally synchronised to frequencies below its nominal 400 kHz. It also features an oscillator output FreqOut, which can be used to implement a simple charge pump in low voltage applications. The MIC2184 in 16-pin SOP, features a 1 mA shutdown mode.
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