EUP7981 Datasheet, PDF (1/10 Pages) Eutech Microelectronics Inc – 150mA Low-Noise LDO in SC-70

EUP7981
150mA Low-Noise LDO in SC-70
DESCRIPTION
The EUP7981 is an efficient, CMOS voltage regulator
optimized for ultra-low-noise applications. It offers
high output accuracy, extremely low dropout voltage
low ground current and fast start-up time.
The EUP7981 provides a very low noise output, ideal
for RF applications where a clean voltage source is
required. A noise bypass pin is also available for
further reduction of output noise.
Designed specifically for handheld and battery-
powered devices, the EUP7981 provides a
TTL-logic-compatible enable pin. When disabled,
power consumption drops nearly to zero.
The EUP7981 also works with low-ESR ceramic
capacitors, reducing the amount of board space
necessary for power applications, critical in handheld
wireless devices.
Available in the SC-70 package, the EUP7981 offers a
wide range of output voltages. Key features include
current limit, thermal shutdown and faster transient
response.
FEATURES
z Space-Saving 5-pin SC-70 Package
z 2.5V to 5.5V Input Voltage Range
z 50µV(rms) Output Noise
z 140mV Dropout @ 150mA
z 75dB PSRR at 1kHz
z Low 70µA Ground Current
z 150mA Output Current
z Stability with 1µF Ceramic Output Capacitors
z Excellent Load/Line Transient
z Thermal Shutdown and Current Limit
Protection
z Available in 1.5V,1.8V,1.85V,2.5V,2.8V,2.85V,
3.0V ,3.3V and Adjustable Voltages
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Cellular Phones
z Bluetooth Portable Radios and Accessories
z PDA and Palmtop Computers
z Consumer/Personal Electronics
Block Diagram
DS7981 Ver1.0 Jan. 2008
Figure 1.
1