MICROCHIP MIC2940A-3.3WT

The MIC2940A and MIC2941A are “bulletproof" efficient voltage regulators with very low dropout voltage (typically 40 mV at light loads and 350 mV at 1A), and low quiescent current (240 μA typical). The quiescent current of the MIC2940A increases only slightly in dropout, thus prolonging battery life. Key MIC2940A features include protection against reversed battery, fold-back current-limiting, and automotive “load dump" protection (60V positive transient). The MIC2940A is available in both fixed voltage (3.3V, 5V, and 12V) and adjustable voltage configurations. The MIC2940A-xx devices are three pin, fixed-voltage regulators. A logic-compatible shutdown input is provided on the adjustable MIC2941A, which enables the regulator to be switched on and off.

• High Output Voltage Accuracy
• Guaranteed 1.25A Output
• Low Quiescent Current
• Low Dropout Voltage
• Extremely Tight Load and Line Regulation
• Very Low Temperature Coefficient
• Current and Thermal Limiting
• Input Can Withstand -20V Reverse Battery and +60V Positive Transients
• Logic-Controlled Electronic Shutdown
• Output Programmable from 1.24V to 26V (MIC2941A)
• Available in TO-220, TO-263, TO-220-5, and TO-263-5 Packages

• Battery-Powered Equipment
• Cellular Telephones
• Laptop, Notebook, and Palmtop Computers
• PCMCIA VCC and VPP Regulation/Switching
• Barcode Scanners
• Automotive Electronics
• SMPS Post-Regulator/DC-to-DC Modules
• Voltage Reference
• High Efficiency Linear Power Supplies