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PDF EUP7981 Data sheet ( Hoja de datos )
| Número de pieza | EUP7981 | |
| Descripción | 150mA Low-Noise LDO | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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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,
www.DpaotawSehreecto4nUs.cuommption 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
1 page  
Typical Operating Characteristics
OUTPUT VOLTAGE vs. INPUT VOLTAGE
3.0
2.5
I =0mA
OUT
2.0
1.5
1.0
I =120mA
OUT
0.5
0.0
www.DataS0heet4U.c1om
234
INPUT VOLTAGE (V)
5
6
EUP7981
OUTPUT VOLTAGE ACCURACY vs. LOAD CURRENT
0.4
0.2
0.0
-0.2
-0.4
0
20 40 60 80 100 120
LOAD CURRENT (mA)
OUTPUT VOLTAGE ACCURACY vs. TEMPERATURE
0.8
I =1mA
OUT
0.4
0.0
-0.4
DROPOUT VOLTAGE vs. LOAD CURRENT
120
Temp=85oC
80 Temp=25oC
40 Temp=-40oC
-0.8
-40
-15 10 35 60
Temperature (oC)
85
0
0 20 40 60 80 100 120
LOAD CURRENT (mA)
GROUND CURRENT vs. INPUT VOLTAGE
200
I =120mA
OUT
160
120
80
40
I =0mA
OUT
0
0123456
INPUT VOLTAGE (V)
GROUND CURRENT vs. LOAD CURRENT
200
160
Vin=5.5V
120
Vin=3.3V
80
40
0
0 20 40 60 80 100 120
LOAD CURRENT (mA)
DS7981 Ver1.0 Jan. 2008
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet EUP7981.PDF ] | |
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