Microchip | MIC2920A-3.3WT

The MIC2920A family are “bulletproof,” efficient voltage regulators with very low dropout voltage (typically 40 mV at light loads and 370 mV at 250 mA), and very low quiescent current (140 µA typical). The quiescent current of the MIC2920A increases only slightly in dropout, prolonging battery life. Key MIC2920A features include protection against reversed battery, fold-back current limiting, and automotive “load dump” protection (60 V positive transient).

The MIC2920 is available in several configurations. The MIC2920A-x.x devices are three pin fixed voltage regulators available in 3.3 V, 4.85 V, 5 V, and 12 V outputs. The MIC29201 is a fixed regulator offering a logic compatible ON/OFF (shutdown) input and an error flag output. This flag may also be used as a power-on reset signal. A logic-compatible shutdown input is provided on the adjustable MIC29202 which allows the regulator to be switched on and off. The MIC29204 8-pin SOIC adjustable regulator includes both shutdown and error flag pins and may be pin-strapped for 5 V output or programmed from 1.24 V to 26 V using two external resistors.

Key Features :

• High output voltage accuracy
• Guaranteed 400 mA output
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Input withstands –20 V reverse battery and
• 60 V positive transients
• Error flag warns of output dropout
• Logic-controlled electronic shutdown
• Output programmable from 1.24 V to 26 V
• (MIC29202/MIC29204)
• Available in TO-220, TO-220-5, and surface-mount
• TO-263-5, SOT-223, and SO-8 packages

Applications :

• Battery-powered equipment
• Cellular telephones
• Laptop, notebook, and palmtop computers
• PCMCIA VCC and VPP regulation/switching
• Bar code scanners
• Automotive electronics
• SMPS post-regulators
• Voltage reference
• High-efficiency linear power supplies