MP20045
Low Noise, 1A
Linear Regulator
The Future of Analog IC Technology
DESCRIPTION
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.
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.
FEATURES
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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
13µV
RMS
Low Noise Output
56dB PSRR at 1kHz
Current Limiting and Thermal Protection
3mm×3mm QFN8 and SOIC8E Packages
Notebook Computers
Cordless Telephones
Cellular Phones
Modems
Hand-Held Instruments
PDA and Palmtop Computers
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
R3
100k
C
IN
PG
EN
MP20045
FB
C
OUT
2.2
VOUT
R3
100k
C
IN
PG
EN
MP20045
FB
R2
C
OUT
2.2
VIN
VOUT
R1
C3(Optional)
0.1nF
V
OUT
=1.5
×
(1+
R1
)Volts
R2
Fixed Version
Adjustable Version
MP20045 Rev. 0.92
1/4/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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