Description

Important: The MIC38300 is not recommended for new designs, as it is being replaced by the MIC38300A, which has a thicker package. More information about the MIC38300A part can be found on the Microchip website: www.microchip.com/en-us/product/mic38300a

The MIC38300 is a 3A peak, 2.2A continuous output current step down converter. This is the first device in a new generation of high-efficiency, low-dropout regulators that provide the benefits of an LDO in respect to ease of use, fast transient performance, high PSRR, and low noise while offering the efficiency of a switching regulator.

As output voltages move lower, the output noise and transient response of a switching regulator become an increasing challenge for designers. By combining a switcher whose output is slaved to the input of a high-performance LDO, high efficiency is achieved with a clean low noise output. The MIC38300 is designed to provide less than 5mV of peak to peak noise and over 70 dB of PSRR at 1 kHz. Furthermore, the architecture of the MIC38300 is optimized for fast load transients that allow maintenance of less than 30 mV of output voltage deviation even during ultra-fast load steps, making the MIC38300 an ideal choice for low-voltage ASICs and other digital ICs.

The MIC38300 features a fully-integrated switching regulator and LDO combo, operates with input voltages from 3.0V to 5.5V input, and offers adjustable output voltages down to 1.0V.

The MIC38300 is offered in the small 28-pin 4 mm × 6 mm × 0.9 mm VQFN package and can operate from –40°C to +125°C.