This document introduces Micrel MIC2205 2MHz PWM synchronous buck regulator, which features a LOWQ™ LDO standby mode that draws only 18µA of quiescent current.
The Micrel MIC2205 is a high efficiency 2MHz PWM synchronous buck (step-down) regulator that features a LOWQ™ LDO standby mode that draws only 18 µA of quiescent current. It allows an ultra-low noise, small size, and high efficiency solution for portable power applications such as cellular phones, PDAs, and USB peripherals. In PWM mode, the device operates with a constant frequency 2MHz PWM control, while under light load conditions, it can switch to LDO mode to reduce switching losses and save battery life.
| Supply Voltage Range | 2.7V to 5.5V |
|---|---|
| Output Current (PWM Mode) | 600mA |
| Oscillator Frequency | 2MHz |
| Quiescent Current (LDO Mode) | 18 µA |
| Output Voltage Noise | 75 µVrms |
| Package Type | 3mm x 3mm MLF-10L |
| Junction Temperature Range | -40°C to +125°C |
The device draws only 18 µA of quiescent current in the LDO standby mode.
The MIC2205 can supply up to 600mA output current in PWM mode.
The regulator operates with a constant frequency 2MHz PWM control.