MP2040 Datasheet, PDF (1/12 Pages) Monolithic Power Systems – Fast Transient Response, 3A Dual Supply Very Low Dropout Linear Regulator

The Future of Analog IC Technology
MP2040
Fast Transient Response, 3A Dual Supply
Very Low Dropout Linear Regulator
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
• 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
APPLICATIONS
• Industrial Process & Control Equipment
• Telecom Equipment
• PAID Storage
• DSP/ASIC/µC Post Regulation for Switching
Power Supplies
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
BIAS
PGOOD
GND
1 _IN
U1
10
OUT
2 _IN
9
OUT
MP2040
3 _BIAS
FB ⁸
4 _PG
EN
EN ⁷
5 _GND
BP ⁶
C8
1nF
C6
10nF
1.2V/3A
VOUT
MP2040 Rev.1.0
www.MonolithicPower.com
1
9/21/2010
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