TC1269

TC1269 300mA CMOS LDO with Shutdown and VREF Bypass Features 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 General Description 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. Applications Battery Operated Systems Portable Computers Medical Instruments Instrumentation Cellular/GSM/PHS Phones Linear Post-Regulator for SMPS Pagers Digital Cameras Typical Application VOUT 1 + C1 1µF 2 VOUT VIN 8 VIN NC SHDN 7 Shutdown Control (from Power Control Logic) 6 TC1269 3 NC NC Bypass Device Selection Table Part Number TC1269-2.5VUA TC1269-2.8VUA TC1269-3.0VUA TC1269-3.3VUA TC1269...