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MIC5247-1.6BML Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC5247-1.6BML Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 11 page MIC5247 Micrel, Inc. February 2006 1 M9999-022406 General Description The MIC5247 is an efficient and precise, low-voltage CMOS voltage regulator optimized for ultra-low noise applications. The MIC5247 offers better than 1% initial accuracy and 85µA constant ground current over load (typically 85µA). The MIC5247 provides a very low-noise output, ideal for RF applications where quiet voltage sources are required. A noise bypass pin is also available for further reduction of output noise. Designed specifically for handheld and battery-powered de- vices, the MIC5247 provides a logic compatible enable pin. When disabled, power consumption drops nearly to zero. The MIC5247 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in handheld wireless devices. Key features include current limit, thermal shutdown, a push- pull output for faster transient response, and an active clamp to speed up device turnoff.Available in the 6-pin 2mm × 2mm MLF™ package and the IttyBitty® SOT-23-5 package, the MIC5247 also offers a range of fixed output voltages. All support documentation can be found on Micrel’s web site at www.micrel.com. Typical Application 1 5 2 3 4 COUT CBYP Enable Shutdown EN VOUT (optional) MIC5247-x.xBM5 EN (pin 3) may be connected directly to IN (pin 1). VIN MIC5247 150mA Low-Voltage µCap Linear Regulator Features • Ultra-low noise • Low-voltage outputs • Load independent, ultra-low ground current: 85µA • 150mA output current • Current limiting • Thermal shutdown • Tight load and line regulation • “Zero” off-mode current • Stability with low-ESR capacitors • Fast transient response • Logic-controlled enable input Applications • Cellular phones and pagers • Cellular accessories • Battery-powered equipment • Laptop, notebook, and palmtop computers • PCMCIA VCC and VPP regulation/switching • Consumer/personal electronics • SMPS post-regulator/DC-to-DC modules • High-efficiency linear power supplies Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com MIC5247-x.xBML 1 EN 6 CBYP (optional) VIN VOUT COUT 5 4 2 3 ENABLE SHUTDOWN Ultra-Low-Noise Regulator Application |
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