General Description
The MIC94310 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 MIC94310 maintains
high power supply ripple rejection (PSRR) with input
voltages operating near the output voltage level to
improve overall system efficiency. A low-voltage logic
enable pin facilitates ON/OFF control at typical GPIO
voltage levels.
The MIC94310 operates from an input voltage of 1.8V
to 3.6V.
Packaged in a 4-pin 1.2 mm × 1.6 mm TDFN, a 5-pin
SOT-23, or a 0.88 mm × 0.88 mm 4-Ball WLCSP, the
MIC94310 has a junction operating temperature range of -40°C to +125°C.

Features
• 1.8V to 3.6V Input Voltage Range
• Active Noise Rejection Over a Wide Frequency
Band: >50 dB from 10 Hz to 10 MHz at 200 mA
Load
• Rated to 200 mA Output Current
• Fixed Output Voltages
• Current-Limit and Thermal-Limit Protected
• 1.2 mm x 1.6 mm 4-Pin TDFN
• 5-Pin SOT-23
• Ultra-Small 0.88 mm x 0.88 mm WLCSP
• Logic-Controlled Enable Pin
• -40°C to +125°C Junction Temperature Range

Applications
• Smartphones/Smart Books
• Tablet PC/Notebooks and Webcams
• Digital Still and Video Cameras
• Global Positioning Systems
• Mobile Computing
• Automotive and Industrial Applications