TC573302

TC57 Line Regulator Controller Features Low Dropout Voltage: 100mV @ 650mA with FZT749 PNP Transistor 2.7V to 8V Supply Range Low Operating Current: 50µA Operating, 0.2µA Shutdown Low True Chip Enable Output Accuracy < ±2% Small Package: 5-Pin SOT-23A General Description The TC57 is a low dropout regulator controller that operates with an external PNP pass transistor, allowing the user to tailor the LDO characteristics to suit the application at hand. This results in lower dropout operation (and often lower cost) compared with traditional linear regulators with on-board pass transistors. The maximum output current of a TC57based regulator circuit is limited only by the characteristics of the external pass transistor. For example, a maximum output current of 650mA (with a dropout voltage of 100mV) results when an FZT749 pass transistor is used, while a Darlington configuration can deliver up to 4A. Flexibility, and superior performance make this family of regulator controllers the ideal choice in applications where low dropout voltage and low installed cost are key. Applications Battery Operated Systems Portable Instruments High-Efficiency Linear Regulator Post-Regulator for SMPS Power Supply or Battery Back-Up Supply for Memory Device Selection Table Output Part Number Voltage TC572502ECT TC573002ECT TC573302ECT 2.5V 3.0V 3.3V Package Temperature Range Functional Block Diagram VIN +3.3V FZT749 Q1 VOUT +3V 5-Pin SOT-23A -40°C to +85°C 5-Pin SOT-23A -...