MIC2184 - Micrel Semiconductor

MIC2184 Low Voltage Buck PWM Controller

Micrel’s MIC2184 is a high efficiency PWM buck control IC. With its wide input voltage range of 2.9V to 14V, the MIC2184 can be used to efficiently step voltages down in 1- or 2-cell Li Ion battery powered applications, as well as in fixed 3.3V, 5V, or 12V systems. Efficiencies over 90% are achievable over a wide range of load conditions with the MIC2184’s P.

Features

an oscillator output, FreqOut, which can be used to implement a simple charge pump in low voltage applications. The output of the charge pump can be fed into the gate drive power circuitry via the VINP pin, allowing enhanced gate drive, hence higher efficiencies, despite low input voltages. MIC2184 features a 1µA shutdown mode, and a programmable undervoltage lockout, making it well suited for portable applications. The MIC2184 is available in 16 pin SOP and QSOP package options with a junction temperture range range from
  –40°C to +125°C. Features
• Input voltage range: 2.9V to 14V
• >90% eff.