MCP1253T-33X50I/MS: A 3.3V, 120mA Low-Noise Positive Fixed Regulated Charge Pump

In the realm of power management, efficiently generating a stable and clean voltage rail from a single input source remains a critical design challenge, particularly in space-constrained and noise-sensitive applications. The MCP1253T-33X50I/MS addresses this need by offering a highly integrated, monolithic charge pump DC-DC converter that delivers a fixed 3.3V output at up to 120mA of continuous output current. Its standout feature is its ability to achieve this with exceptionally low noise operation, making it an ideal power solution for analog and RF circuits where switching interference must be minimized.

Unlike traditional inductive switchers, this device utilizes a switched capacitor (charge pump) architecture. This design eliminates the need for bulky and expensive inductors, saving significant board space and reducing total solution cost. The IC requires only a few small external capacitors to operate, streamlining the design-in process and minimizing the bill of materials (BOM). The MCP1253T-33X50I/MS is engineered for versatility, accepting a wide input voltage range from 2.7V to 5.5V. This makes it perfectly suited for a vast array of applications, including boosting lithium-ion battery voltages or regulating 5V supplies down to a stable 3.3V rail.

A key performance differentiator is its low-noise operational characteristic. The internal oscillator and switching circuitry are optimized to minimize voltage ripple, which is a common drawback in charge pump converters. This results in a clean, stable output that is crucial for powering sensitive components like precision sensors, audio codecs, Wi-Fi/Bluetooth modules, and microcontroller analog front-ends without degrading system performance.

Furthermore, the device includes built-in protection features such as short-circuit protection and thermal shutdown, enhancing system reliability under fault conditions. Its compact MSOP-8 package is ideal for portable and miniature electronics, including IoT sensors, medical devices, handheld instruments, and battery-powered peripherals.

ICGOODFIND: The MCP1253T-33X50I/MS stands out as a superior power management solution by merging the simplicity and compact footprint of a charge pump with the critical advantage of low-noise output. It provides a robust, cost-effective, and simple-to-design 3.3V rail for applications where both space and signal integrity are at a premium.

Keywords:

Low-Noise

Charge Pump

3.3V Regulator

120mA Output

Fixed Output