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MIC5250 Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC5250 Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 12 page MIC5250 Micrel June 2003 1 MIC5250 General Description The MIC5250 is an efficient, precise dual CMOS voltage regulator optimized for ultra-low-noise applications. The MIC5250 offers better than 1% initial accuracy, extremely low dropout voltage (typically 150mV at 150mA) and constant ground current over load (typically 100 µA). The MIC5250 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 hand-held and battery-powered devices, the MIC5250 provides TTL logic compatible enable pins. When disabled, power consumption drops nearly to zero. The MIC5250 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. Key features include current limit, thermal shutdown, push- pull outputs for faster transient response, and active clamps to speed up device turnoff. Available in the 10-lead MSOP (micro-shrink-outline package), the MIC5250 also offers a range of fixed output voltages. Typical Application CBYPB (optional) COUTB INA OUTA BYPA GNDA OUTB BYPB GNDB ENA INB ENB 3.3V VINA VINB 3.3V MIC5250-3.3BMM CBYPA (optional) COUTA ENABLE SHUTDOWN ENABLE SHUTDOWN ENA may be connected directly to INA. ENB may be connected directly to INB. GNDA and GND B may be connected to isolated grounds or the same ground. 10 1 3 8 4 6 2 9 7 5 Dual Ultra-Low-Noise Regulator Circuit MIC5250 Dual 150mA µCap CMOS LDO Regulator OBSOLETE Features • Ultralow dropout—100mV @ 100mA • Ultralow noise—30 µV(rms) • Stability with ceramic, tantalum, or aluminum electrolytic capacitors • Load independent, ultralow ground current • 150mA output current • Current limiting • Thermal Shutdown • Tight load and line regulation • “Zero” off-mode current • Fast transient response • TTL-Logic-controlled enable input Applications • Cellular phones and pagers • Cellular accessories • Battery-powered equipment • Laptop, notebook, and palmtop computers • PCMCIA V CC and VPP regulation/switching • Consumer/personal electronics • SMPS post-regulator/dc-to-dc modules • High-efficiency linear power supplies Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com Ordering Information Part Number Voltage Junction Temp. Range Package MIC5250-2.7BMM 2.7V –40 °C to +125°C 10-lead MSOP MIC5250-2.8BMM 2.8V –40 °C to +125°C 10-lead MSOP MIC5250-3.0BMM 3.0V –40 °C to +125°C 10-lead MSOP MIC5250-3.3BMM 3.3V –40 °C to +125°C 10-lead MSOP Other voltages available. Contact Micrel for details. |
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Similar Description - MIC5250_03 |
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