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MIC94355-SYCS Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC94355-SYCS Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 16 page MIC94325/45/55 500mA LDO with Ripple Blocker Technology Ripple Blocker is a trademark of Micrel, Inc Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com General Description 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. A low- voltage logic enable pin facilitates ON/OFF control at typical GPIO voltage levels. The MIC943x5 operates from an input voltage of 1.8V to 3.6V. The MIC943x5 options include fixed (MIC94345/55) or adjustable (MIC94325) output voltages. The MIC94355 version offers an auto-discharge to discharge the output capacitor when the part is disabled. Packaged in a 0.84mm x 1.32mm 6-ball CSP or a 6-pin 1.6mm x 1.6mm Thin DFN, the MIC943x5 has a junction operating temperature range of –40 C to +125C. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Features 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 Ultra-small 0.84mm x 1.32mm 6-ball CSP 1.6mm x 1.6mm, 6-pin Thin DFN Logic-controlled enable pin 40C to +125C junction temperature range Applications Smart phones Tablet PC/notebooks and webcams Digital still and video cameras Global positioning systems Mobile computing Automotive and industrial applications _________________________________________________________________________________________________ Typical Application October 2012 M9999-102512-A MIC94355 PSRR COUT = 4.7µF -120 -100 -80 -60 -40 -20 0 10 100 1,000 10,000 100,00 0 1,000,0 00 10,000, 000 FREQUENCY (Hz) VIN = 2.8V + 40mVpp VOUT = 1.8V COUT = 4.7µF 10 100 1K 10K 100K 1M 10M 10mA 200mA 500mA |
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