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
Space-Saving 5-pin SC-70 Package
2.5V to 5.5V Input Voltage Range
50µV(rms) Output Noise
140mV Dropout @ 150mA
75dB PSRR at 1kHz
Low 70µA Ground Current
150mA Output Current
Stability with 1µF Ceramic Output Capacitors
Excellent Load/Line Transient
Thermal Shutdown and Current Limit
Protection
Available in 1.5V,1.8V,1.85V,2.5V,2.8V,2.85V,
3.0V ,3.3V and Adjustable Voltages
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
Cellular Phones
Bluetooth Portable Radios and Accessories
PDA and Palmtop Computers
Consumer/Personal Electronics
Block Diagram
Figure 1.
DS7981
Ver1.0
Jan. 2008
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
