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MIC5249-2.85YMM Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC5249-2.85YMM Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 7 page MIC5249 300mA µCap LDO with Programmable Power-On Reset Delay 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 MIC5249 is an efficient, precise 300mA CMOS voltage regulator with power on reset (POR) delay which can be implemented via an external capacitor. It offers 1% initial accuracy, extremely low dropout voltage (typically 400mV @ 300mA), and low ground current (typically 85mA) over load. Designed specifically for noise-critical applications in hand- held or battery-powered devices, the MIC5249 comes equipped with a noise reduction feature to filter the output noise via an external capacitor. Other features of the MIC5249 include a logic-compatible enable pin, current limit, thermal shutdown, ultra-fast transient response, and an active clamp to speed up device turnoff. The MIC5249 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The MIC5249 is available in the MSOP-8 package. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Features • 300mA output current • High PSRR: 65dB@120Hz • Stable with ceramic output capacitor • Power-on-Reset (POR) output with adjustable delay time • High output accuracy: − ±1.0% initial accuracy − ±3.0% over temperature • Low dropout voltage of 340mV @ 300mA • Low quiescent current: 85µA • Zero current shutdown mode • Thermal-shutdown and current-limit protection • Tiny MSOP-8 package Applications • Cellular phones • PDAs • Fiber optic modules Typical Application Ultra-Low Noise Application March 2012 1 M9999-030812 |
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Similar Description - MIC5249-2.85YMM |
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