MP2040
Fast Transient Response, 3A Dual Supply
Very Low Dropout Linear Regulator
The Future of Analog IC Technology
DESCRIPTION
The MP2040 is a very low dropout, dual supply
linear regulator. The use of two supplies allows
the BIAS to control an NMOS device. The
NMOS device supplies power to the load via
the IN. In this way the input supply can be just
above the desired output, yet still provide very
good regulation performance due to the higher
bias supply. The BIAS operates from a 3.3V to
5.5V input and regulates the output voltage to
as low as 0.9V, and as high as 3.3V.
The MP2040 can supply up to 3A of load
current with a typical dropout voltage of 150mV.
The BIAS runs the internal reference and drive
circuitry, while the output current comes directly
from the IN for high efficiency regulation.
Other features of MP2040 include thermal
overload and current limit protection, power
good indicator, stability with ultra low ESR
ceramic capacitors as low as 1uF, and fast
transient response. The MP2040 is available in
10-pin QFN (3mm x 3mm), and in QFN (5mm x
5mm) packages.
FEATURES
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Wide 1.1V to 5V Input Voltage Range
Stable with Very Small Ceramic Capacitors
150mV Dropout at 3A Output
2% Accurate Output Voltage
Adjustable Output Range of 0.9V to 3.3V
Low Noise: 80µV
RMS
(10Hz to 100kHz)
Very fast transient response
PSRR
o
40dB at 100kHz
Better Than 0.001%/mA Load Regulation
Stable With Low-ESR Output Capacitors
Internal Thermal Protection
Current Limit Protection
0.1µA Typical Quiescent Current at
Shutdown
Power Good Indicator
Industrial Process & Control Equipment
Telecom Equipment
PAID Storage
DSP/ASIC/µC Post Regulation for Switching
Power Supplies
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
U1
VIN
1
IN
IN
OUT
OUT
10
2
9
1.2V/3A
VOUT
BIAS
3
MP2040
BIAS
FB
8
PGOOD
GND
4
PG
GND
EN
BP
7
EN
C6
10nF
5
6
C8
1nF
MP2040 Rev.1.0
9/21/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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