The Micrel MIC2204 is a high‑efficiency 2 MHz synchronous buck regulator delivering up to 600 mA with an input range of 2.3‑5.5 V.
The MIC2204 is a high‑efficiency, 2 MHz PWM synchronous buck switching regulator. It operates from 2.3 V to 5.5 V input and can supply over 600 mA of output current with output voltages down to 1 V. Internal MOSFETs, a constant‑frequency PWM scheme, and an internal compensation technique give efficiencies above 95 % and ultra‑fast transient response.
The device is offered in 10‑pin MSOP and 3 mm × 3 mm MLF‑10L packages and operates over a –40 °C to +125 °C junction temperature range. It includes features such as SYNCLOCK daisy‑chain capability, low quiescent current, and built‑in thermal shutdown and current‑limit protection, making it suitable for portable power, cellular phones, PDAs, WLAN and RF power supplies, and Li‑Ion battery‑powered applications.
| Input voltage range | 2.3 V – 5.5 V |
|---|---|
| Maximum output current | 600 mA |
| Switching frequency | 2 MHz (adjustable 1.8‑2.5 MHz) |
| Efficiency | >95 % |
| Quiescent current | <340 µA (typical <15 µA) |
| Operating temperature range | –40 °C to +125 °C |
| Package options | 10‑pin MSOP, 3 mm × 3 mm MLF‑10L |
The MIC2204 operates from 2.3 V to 5.5 V input.
It can supply up to 600 mA of output current.
The regulator uses a constant 2 MHz PWM scheme, adjustable between 1.8 MHz and 2.5 MHz via SYNC_IN.
When enabled, the quiescent current is typically under 15 µA (maximum <340 µA).