EUP7903 Datasheet, PDF (1/10 Pages) Eutech Microelectronics Inc – 300mA High PSRR LDO Regulators

EUP7903
300mA 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 1uF 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 (50mV 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 2.5V to 5.5V Input Voltage Range
z 180mV@300mA Dropout Voltage
z Excellent Transient Response
z Stable with 1uF Ceramic Output Capacitor
z 70dB PSRR at 1kHz
z Low 90µA Quiescent Current
z Low Shutdown Current <1µA
z Output Current Limit
z Short Circuit Protection
z Output Voltage With High Accuracy:
2% Initial Accuracy
Fixed Output Voltage 1.25V~5V (0.05V step)
Adjustable Output Voltage: 1.25V~5V
z Thermal Shutdown
z Output Auto-Discharge in Shutdown
z RoHS Compliant and 100% Lead (Fb)-Free
APPLICATIONS
Typical Application Circuit
z Cellular Phones
z Bluetooth portable radios and Accessories
z Battery-Powered Equipment
z Laptop, Palmtops, Notebook Computer
z PDAs
z Digital still Camera and Video Recorders
DS7903 Ver 1.0 Nov. 2008
Figure. 1 Adjustable Output
1