On August 6, 2014, Micrel Korea (CEO Young-Jun Oh, www.micrel.com ), an industry leader in high-performance linear and power solutions as well as LAN, timing, and communications solutions, announced the supply of the MIC94300 integrated load switch and MIC94310 DC/DC regulator, which provide high-frequency ripple attenuation (switching noise elimination) performance based on Micrel’s Ripple Blocker™ active filter technology. These two devices can eliminate active noise across various frequency bands regardless of the power supply design, making them suitable for applications where switching noise cannot be tolerated due to sensitive downstream circuitry. Consequently, they are applicable to a very wide range of applications, including tablets, PCs, and laptop computers, as well as security and surveillance cameras, digital still/video cameras, barcode scanners, medical imaging equipment, smartphone cameras, RF power, and GPS.

The MIC94300 and MIC94310 support up to 200mA and operate within an input voltage range of 1.8V to 3.6V, enabling perfect load switching of the low-voltage power rail in any electronic device. In particular, they provide excellent active noise rejection performance through Micrel's unique Ripple Blocker active filter technology, achieving 80dB PSRR at 1kHz and 60dB PSRR at 5MHz. The MIC94310 offers an ultra-low dropout voltage of 20mV along with a 40mV dropout at 200mA output current, while the MIC94300 maintains a fixed dropout voltage of 170mV. In addition, these devices include linear current limiting and thermal shutdown functions to provide complete protection against damage caused by error conditions.

Both devices are available in a 0.88mm x 0.88mm 4-bump CSP or a 4-pin 1.2mm x 1.6mm thin MLF® package. The MIC94310 is also available in a SOT-23 package. Additionally, the junction operating temperature range is -40°C to +125°C.

Young-jun Oh, President of Micrel Korea, stated, “The MIC94300 and MIC94310, utilizing ripple blocker active filter technology, provide clean system power to enhance overall system performance. This allows for the transmission of higher-intensity RF signals and provides dynamic signal integrity by improving signal detection performance in noise-sensitive applications.” He added, “In particular, as an ultra-compact integrated solution, it is approximately 63% smaller than discrete components, which can reduce board space and lower costs when developing systems with various functions.”