MIC5255-3.3YM5-TR Microchip

MIC5255 150mA Low Noise Cap CMOS LDO General Description Features The MIC5255 is an efficient, precise CMOS voltage Input voltage range: 2.7V to 6.0V regulator optimized for ultra-low-noise applications. It Thin SOT package: 1mm height SOT-23-5 offers 1% initial accuracy, extremely-low dropout voltage Ultra-low output noise: 30V(rms) (135mV at 150mA) and low ground current (typically Stability with ceramic output capacitors 90A). The MIC5255 provides a very-low-noise output, ideal for RF applications where a clean voltage source is Ultra-low dropout: 135mV 150mA required. A noise bypass pin is also available for further High output accuracy: reduction of output noise. 1.0% initial accuracy Designed specically for handheld and battery-powered 2.0% over temperature devices, the MIC5255 provides a TTL-logic-compatible en- Low quiescent current: 90A able pin. When disabled, power consumption drops nearly Tight load and line regulation to zero. TTL-Logic-controlled enable input The MIC5255 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary Zero off-mode current for power applications, critical in handheld wireless Thermal shutdown and current limit protection devices. Key features include current limit, thermal shutdown, faster Applications transient response, and an active clamp to speed up device turn-off. Available in the 6-pin 2mm 2mm MLF Cellular phones and pagers package, the IttyBitty SOT-23-5 package and the new Cellular accessories Thin SOT-23-5, which offers the same footprint as the Battery-powered equipment standard IttyBitty SOT-23-5, but only 1mm tall. The Laptop, notebook, and palmtop computers MIC5255 offers a range of output voltages. Consumer/personal electronics Data sheets and support documentation can be found on Micrels web site at www.micrel.com. Typical Application MIC5255-x.x M5 V V IN OUT C = 1.0F 15 IN Ceramic 2 C = 1.0F OUT Enable 3 4 Ceramic Shutdown EN EN (pin 3) may be C = 0.01F connected directly BYP to IN (pin 1). Ultra-Low-Noise Regulator Application IttyBitty is a registered trademark of Micrel, Inc MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5255 Ordering Information Part Number Marking Junction Voltage* Package Temp. Range Standard Pb-Free Standard Pb-Free** MIC5255-2.5BD5 MIC5255-2.5YD5 NW25 NW25 2.5V 40 to +125C 5-Pin TSOT-23 MIC5255-2.5BM5 MIC5255-2.5YM5 LW25 KW25 2.5V 40 to +125C 5-Pin SOT-23 MIC5255-2.6BD5 MIC5255-2.6YD5 NW26 NW26 2.6V 40 to +125C 5-Pin TSOT-23 MIC5255-2.6BM5 MIC5255-2.6YM5 LW26 KW26 2.6V 40 to +125C 5-Pin SOT-23 MIC5255-2.7BD5 MIC5255-2.7YD5 NW27 NW27 2.7V 40 to +125C 5-Pin TSOT-23 MIC5255-2.7BM5 MIC5255-2.7YM5 LW27 KW27 2.7V 40 to +125C 5-Pin SOT-23 MIC5255-2.75BM5 MIC5255-2.75YM5 LW2H KW2H 2.75V 40 to +125C 5-Pin SOT-23 MIC5255-2.8BD5 MIC5255-2.8YD5 NW28 NW28 2.8V 40 to +125C 5-Pin TSOT-23 MIC5255-2.8BM5 MIC5255-2.8YM5 LW28 KW28 2.8V 40 to +125C 5-Pin SOT-23 MIC5255-2.8BML MIC5255-2.8YML W28 W28*** 2.8V 40 to +125C 6-Pin 2x2 MLF MIC5255-2.85BD5 MIC5255-2.85YD5 NW2J NW2J 2.85V 40 to +125C 5-Pin TSOT-23 MIC5255-2.85BM5 MIC5255-2.85YM5 LW2J KW2J 2.85V 40 to +125C 5-Pin SOT-23 MIC5255-2.85BML MIC5255-2.85YML W2J W2J*** 2.85V 40 to +125C 6-Pin 2x2 MLF MIC5255-2.9BD5 MIC5255-2.9YD5 NW29 NW29 2.9V 40 to +125C 5-Pin TSOT-23 MIC5255-2.9BM5 MIC5255-2.9YM5 LW29 KW29 2.9V 40 to +125C 5-Pin SOT-23 MIC5255-3.0BD5 MIC5255-3.0YD5 NW30 NW30 3.0V 40 to +125C 5-Pin TSOT-23 MIC5255-3.0BM5 MIC5255-3.0YM5 LW30 KW30 3.0V 40 to +125C 5-Pin SOT-23 MIC5255-3.0BML MIC5255-3.0YML W30 W30*** 3.0V 40 to +125C 6-Pin 2x2 MLF MIC5255-3.1BM5 MIC5255-3.1YM5 LW31 KW31 3.1V 40 to +125C 5-Pin SOT-23 MIC5255-3.2BM5 MIC5255-3.2YM5 LW32 KW32 3.2V 40 to +125C 5-Pin SOT-23 MIC5255-3.3BD5 MIC5255-3.3YD5 NW33 NW33 3.3V 40 to +125C 5-Pin TSOT-23 MIC5255-3.3BM5 MIC5255-3.3YM5 LW33 KW33 3.3V 40 to +125C 5-Pin SOT-23 MIC5255-3.3BML MIC5255-3.3YML W33 W33*** 3.3V 40 to +125C 6-Pin 2x2 MLF MIC5255-3.5BM5 MIC5255-3.5YM5 LW35 KW35 3.5V 40 to +125C 5-Pin SOT-23 Notes: * Other Voltage available. Contact Micrel for details. ** Under bar / Over bar symbol may not be to scale. *** Over bar symbol located after Pin 1 identifier. M9999-110906 November 2006 2