Analog Devices (ADI) has released an ultra-low noise regulator for noise-sensitive applications.


ADI announced on the 23rd that it has launched an ultra-low noise dual-output DC/DC μModule regulator based on patented silicon, layout, and packaging innovation technologies.

The LTM8080, operating at a maximum input voltage of 40V, consists of a high-efficiency synchronous Silent Switcher® step-down regulator at the front and two separate low-noise LDO (low dropout) regulators connected thereto.

To further suppress switching noise, the LTM8080 incorporates an EMI barrier or shield into the packaging. As a result, very low noise characteristics were achieved, including RMS noise of less than 1 μVRMS in the range of 10Hz to 100KHz, spot noise of 2nV/√Hz at 10KHz, and 80dB PSRR at 100KHz.

Compared to discrete solutions without EMI shielding, the LTM8080 reduces output ripple voltage by up to 70%, enabling simpler and quieter designs.

The LTM8080 is specifically designed to power digital loads sensitive to switching regulator noise, such as data converters, RF transmitters, FPGA I/O and clocks, operational amplifiers, transceivers, and medical scanners.

The integrated silent switcher architecture applied to the LTM8080 μModule regulator minimizes EMI emissions and enables the device to pass CISPR22 Class B and CISPR25 Class 5 standard tests without an input filter.

Variable switching frequency (200kHz–2MHz) and selectable operating modes minimize the risk of frequency interference for very low noise measurement and high-speed/high-precision signal chain applications.

Looking at the key features of the LTM8080, there are dual 500mA or single 1A output currents, an output voltage of 0V to 8V, a voltage tracking function to minimize power loss, a 100μA SET pin current with an initial accuracy of ±1%, and the ability to connect devices in parallel for lower noise and higher current.