EUP7903 Datasheet | Eutech Microelectronics

300m A High PSRR LDO Regulators DESCRIPTION The EUP7903 is a high current, low-dropout (LDO) linear regulator with fast transient response and high PSRR. It offers high output accuracy, extremely low dropout voltage, low quiescent current and fast start-up time. The EUP7903 is designed to work with low-ESR ceramic capacitors, reducing the amount of the PCB area necessary for power applications. Only a 1u F ceramic output capacitor can make the device stable over the whole load range. EUP7903 can be externally set either fixed output mode or adjustable output mode. Connect FB pin to GND to select the fixed output mode. Its output is one of pre-set values: 1.25V~5V (50m V per step). Operated in the adjustable mode when the FB pin is connected to an external resistors divider, its output can be adjusted from 1.25V to 5V. Other key Features include over-current protection, thermal shutdown. The device is available in the small SOT23-5 package. Features z z z z z z z z z z 2.5V to 5.5V Input Voltage Range 180m V@300m A Dropout Voltage Excellent Transient Response Stable with 1u F Ceramic Output Capacitor 70d B PSRR at 1k Hz Low 90µA Quiescent Current Low Shutdown Current¡G<1µA Output Current Limit Short Circuit Protection Output Voltage With High Accuracy: 2% Initial Accuracy Fixed Output Voltage¡G1.25V~5V (0.05V step) z z z Adjustable Output Voltage: 1.25V~5V Thermal Shutdown Output Auto-Discharge in Shutdown Ro HS pliant and 100% Lead (Fb)-Free APPLICATIONS z z z z z z € VÛm w`R - yÑb ww w.g ofot ech. Cellular Phones Bluetooth portable radios and Accessories Battery-Powered Equipment Laptop, Palmtops, Notebook puter PDAs Digital still Camera and Video Recorders Typical Application Circuit Figure. 1 Adjustable Output DS7903 Ver 1.0 Nov. 2008 N~- NãtÿmñW3^VÛmw`R- yÑb€g- PQl Sø Tel: 0755-8398 3377 / 135 9011 2223 http://.gofotech. Typical Application Circuit (continued) Figure. 2 Fixed Output Block Diagram VÛm w`R - yÑb € ww...