150mA, LOW-NOISE LDO VOLTAGE REGULATOR
JULY 30, 2008
SPX5205
REV. H
FEATURES
■
Low Noise Output LDO: 40μV
RMS
Possible
■
1% Initial Accuracy
■
Very Low Quiecent Current: 70μA
■
Low Dropout Voltage (210mV at 150mA)
■
Current and Thermal Limiting
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Reverse-Battery Protection
■
Wide Range of Fix Output Voltages:1.2V, 1.5V,
1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 5.0V
■
Zero Off-Mode Current
■
Small 5-Pin SOT-23
■
Pin Compatible to MIC5205/MAX8877
(fixed Options Only) and AS3815
Fixed Output Voltage
V
OUT
BYP
5
4
SPX5205
5 Pin SOT-23
1
V
IN
2
GND
3
EN
Adjustable Output Voltage
V
OUT
ADJ/BYP
5
4
SPX5205
5 Pin SOT-23
1
V
IN
2
GND
3
EN
APPLICATIONS
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PDA
Battery Powered Systems
Cellular Phone
Cordless Telephones
Radio Control Systems
Laptop, Palmtop, and Notebook Computers
Now Available in Lead Free Packaging
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Portable Consumer Equipment
Portable Instrumentation
Bar Code Scanners
SMPS Post-Regulator
DESCRIPTION
The SPX5205 is a positive voltage regulator with very low dropout voltage, output noise and ground current
(750μA at 100mA). V
OUT
has a tolerance of less than 1% and is temperature compensated. Fixed output
voltages 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V, and 5.0V and an adjustable version are available
in a small 5-pin SOT-23 package. Other key features include zero off-mode current, reverse battery
protection, thermal shutdown and current limit. The SPX5205 is an excellent choice for use in battery-
powered applications, and where powe
r conservation is desired such as: cellular/ cordless telephones, radio
control systems, and portable computers.
TYPICAL APPLICATION CIRCUIT
V
IN
1
5
V
OUT
2
+
GND
3
EN
ENABLE may be tied directly to V
IN
SPX5205
+ 1.0μF
4
BYP
(Optn)
TOP View
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
•
(510) 668-7000
•
FAX (510) 668-7017
•
www.exar.com
EXAR [ EXAR CORPORATION ]
