Micrel MIC2185 is a high efficiency synchronous boost PWM control IC. With its wide input voltage range of 2.9V to 14V, the MIC2185 can be used to efficiently boost voltages in 1- or 2-cell Li Ion battery powered applications, as well as fixed 3.3V and 5V systems. Its powerful 5Ω output drivers allow the MIC2185 to supply large output currents with the selection of the proper external MOSFETs. With its fixed frequency PWM architecture, and easily synchronized drive, the MIC2185 is ideal for noise-sensitive telecommunications applications. The nominal 400kHz operating frequency of the MIC2185 can be divided by two, allowing the device to be externally synchronized to frequencies below 400kHz. The MIC2185 also features a low current shutdown mode and a programmable undervoltage lockout. A skipped pulse mode of operation can be manually set to achieve higher efficiencies at light load conditions. The MIC2185 is available in a 16 pin SOIC package and 16 pin QSOP package with an ambient temperature operating range from –40°C to 85°C.
The MIC2185 is a high‑efficiency synchronous boost PWM control IC designed for 2‑cell Li‑ion battery and fixed 3.3 V/5 V systems. It operates from 2.9 V to 14 V input and offers up to 95 % efficiency with selectable 200 kHz or 400 kHz oscillator frequencies.
Key features include a 0.5 A shutdown current, a precision 1.245 V reference output, dual 5 A output drivers, and protection functions such as frequency foldback and programmable undervoltage lockout. The device is offered in 16‑pin SOIC and 16‑pin QSOP packages and operates from –40 °C to 85 °C.
| Input voltage range | 2.9 V to 14 V |
|---|---|
| Efficiency | 95 % |
| Oscillator frequency | 200 kHz / 400 kHz |
| Shutdown current | 0.5 A |
| Reference output voltage | 1.245 V |
| Package types | 16‑pin SOIC, 16‑pin QSOP |
The device operates from 2.9 V up to 14 V input.
It provides a precision reference output of 1.245 V.
The IC is available in 16‑pin SOIC and 16‑pin QSOP packages.
The shutdown current is specified as 0.5 A.