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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