The MIC943x5 Ripple Blocker™ is a monolithic integrated circuit that provides low-frequency ripple attenuation (switching noise rejection) to a regulated output voltage. This is important for applications where a DC/DC switching converter is required to lower or raise a battery voltage but where switching noise cannot be tolerated by sensitive downstream circuits such as in RF applications. The MIC943x5 maintains high power supply ripple rejection (PSRR) with input voltages operating near the output voltage level to improve overall system efficiency.

1.8V to 3.6V input voltage range
Active noise rejection over a wide frequency band: >50dB from 10Hz to 5MHz at 500mA load
Rated to 500mA output current
Fixed and adjustable output voltages
Optional output auto-discharge when disabled
Current-limit and thermal-limit protected
1.6mm x 1.6mm, 6-pin Thin DFN
Logic-controlled enable pin
-40°C to +125°C junction temperature range