MP20045 Datasheet, PDF (1/13 Pages) Monolithic Power Systems – 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.
MP20045
Low Noise, 1A
Linear Regulator
FEATURES
• 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
APPLICATIONS
• 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
R3 ^C_IN
100k
VIN
VOUT
PG ^{MP20045 FB}
EN
C_OUT
2.2
Fixed Version
R3 C_IN
100k
VIN
VOUT
R1
PG ^{MP20045 FB}
R2
EN
C3(Optional)
0.1nF
C_OUT
2.2
V_OUT =1.5 × (1+ _RR12)Volts
Adjustable Version
MP20045 Rev. 1.0
www.MonolithicPower.com
1
10/13/2010
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