High-Performance, Low-Noise Power Management with the Microchip MIC5353-8YMT-TR LDO Regulator

In the realm of modern electronics, the demand for cleaner, more stable power is paramount. Sensitive analog and RF circuits, such as those found in medical devices, IoT sensors, and communication modules, are highly susceptible to noise and ripple from their power supply. This is where high-performance, low-noise Low-Dropout (LDO) regulators become critical components. The Microchip MIC5353-8YMT-TR stands out as a premier solution, engineered to deliver exceptional power quality in a minuscule footprint.

The MIC5353 is a 500mA LDO regulator that combines high power supply rejection ratio (PSRR) with ultra-low noise output, making it an ideal choice for powering noise-sensitive loads. Its ultra-low dropout voltage of only 120mV at 500mA ensures high efficiency even as the input voltage approaches the output level, preserving battery life in portable applications. A key feature of this regulator is its exceptional PSRR performance, typically 75dB at 1kHz, which effectively attenuates ripples and noise from the input source, such as a switching regulator, preventing them from disrupting the downstream circuitry.

Furthermore, the MIC5353 boasts an extremely low output noise level of just 30µVRMS (10Hz to 100kHz). This pristine power delivery is crucial for maintaining the integrity of signals in applications like precision analog-to-digital converters (ADCs), voltage-controlled oscillators (VCOs), and sensitive sensors. The device offers a fixed 1.8V output (as denoted by the -8 suffix in the part number), providing a stable reference and core voltage for modern microcontrollers and processors.

Despite its high performance, the MIC5353-8YMT-TR is housed in a space-saving 0.8mm x 1.2mm 4-ball µDFN package. This incredibly small form factor allows designers to place clean power directly next to the point-of-load (PoL), minimizing board trace inductance and further enhancing performance. The regulator is also designed for simplicity, requiring only a single 1µF ceramic capacitor on the input and output for stable operation, which reduces the total solution cost and board space.

ICGOODFIND: The Microchip MIC5353-8YMT-TR is a superior LDO regulator that masterfully balances high performance, low noise, and miniaturization. It is the optimal choice for designers who need to ensure absolute power cleanliness for their most sensitive components without sacrificing valuable PCB real estate.

Keywords:

Low-Dropout (LDO) Regulator

Power Supply Rejection Ratio (PSRR)

Ultra-Low Noise

Point-of-Load (PoL)

µDFN Package