MICROCHIP TC1269-2.8VUATR

The TC1269 is a fixed output, high accuracy (typically ±0.5%) CMOS upgrade for older (bipolar) low dropout regulators. Total supply current is typically 50μA at full load (20 to 60 times lower than in bipolar regulators). TC1269 key features include ultra low noise operation (plus optional Bypass input); very low dropout voltage (typically 240mV at full load), and fast response to step changes in load. Supply current is reduced to 0.05μA (typical) and VOUT falls to zero when the shutdown input is low. The TC1269 incorporates both over temperature and over current protection. The TC1269 is stable with an output capacitor of only 1μF and has a maximum output current of 300mA.

The TC1269 is a precision regulator available in fixed voltages. Unlike the bipolar regulators, the TC1269 supply current does not increase with load current. In addition, VOUT remains stable and within regulation over the entire 0mA to IOUTMAX operating load current range, (an important consideration in RTC and CMOS RAM battery backup applications).

• Very Low Ground Current for Longer Battery Life
• Very Low Dropout Voltage
• 300mA Output Circuit
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Power Saving Shutdown Mode
• Bypass Input for Ultra Quiet Operation
• Over Current and Over Temperature Protection
• Space-Saving MSOP Package

• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulator for SMPS
• Pagers
• Digital Cameras