MP20045
Low Noise, 1A
Linear Regulator
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP20045 is a low-dropout linear regulator
supplies up to 1A current with 140mV dropout
voltage. The output voltage is set externally
which ranges from 1.5V to 5V by operating from
+2.5V to +5.5V input or can be preset internally
from 1.5V to 5V.
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An internal PMOS pass element is used to
allow a low 110µA ground current, making the
MP20045 suitable for battery-power devices.
Other features include low-power shutdown,
short-circuit and thermal protection. The
MP20045 is available in 8-pin QFN (3mm x
3mm) and SOIC8E packages.
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Up to 1A Output Current
Low 140mV Dropout at 1A
Low 110µA Ground Current
Fixed Output Versions Ranging from 1.5V to
5V and Adjustable Versions
Open Drain Power-Good Status Output
13µVRMS Low Noise Output
56dB PSRR at 1kHz
Current Limiting and Thermal Protection
3mm×3mm QFN8 and SOIC8E Packages
APPLICATIONS
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Notebook Computers
Cordless Telephones
Cellular Phones
Modems
Hand-Held Instruments
PDA and Palmtop Computers
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
R3
100k
VIN
VOUT
R3
100k
CIN
PG
MP20045 FB
EN
CIN
R1
PG
COUT
2.2
VOUT
MP20045 FB
R2
EN
VOUT =1.5 × (1+
Fixed Version
MP20045 Rev. 0.92
1/4/2010
C3(Optional)
0.1nF
COUT
2.2
R1
)Volts
R2
Adjustable Version
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