Microchip | MIC5245-2.5YM5-TR

The MIC5245-2.5YM5 TR is an efficient, precise CMOS voltage regulator optimized for ultra-low-noise applications. The MIC5245 offers better than 1% initial accuracy, extremely low dropout voltage (typically 150 mV at 150 mA) and constant ground current over load (typically 100 μA).

The MIC5245 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 MIC5245 provides a TTL logic compatible enable pin. When disabled, power consumption drops nearly to zero.

The MIC5245 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. Available in the IttyBitty™ SOT-23-5 and power MSO-8 packages, the MIC5245 also offers a range of fixed output voltages.

Features:

• Ultralow dropout—100 mV @ 100 mA
• Ultralow noise—30 μV(rms)
• Stability with tantalum or ceramic capacitors
• Load independent, ultralow ground current
• 150 mA 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 VCC and VPP regulation/switching
• Consumer/personal electronics
• SMPS post-regulator/dc-to-dc modules
• High-efficiency linear power supplies