MP2005 Datasheet, PDF (1/10 Pages) Monolithic Power Systems – 800mA High PSRR, ULDO Linear Regulator

The Future of Analog IC Technology
DESCRIPTION
The MP2005 is a micropower, ultra low-dropout
LDO linear regulator. It has a 1.0V to 5.5V input
voltage range and can regulate the output
voltage from as low as 0.5V. The MP2005 can
supply up to 800mA of load current with a
typical dropout voltage of 90mV. It requires a
bias supply (2.7V to 5.5V) separate from V_IN to
run the internal reference and LDO drive
circuitry. The output current comes directly from
the input voltage supply for high efficiency
regulation. The 0.5V internal reference voltage
allows the output to be programmed to a wide
range of voltages (0.5V to 4V).
A low bias current of 100µA makes the MP2005
ideal for use in battery-powered applications.
The bias supply V_BIAS can be directly applied
from the battery while V_IN is powered from the
high efficiency buck regulator (or other
secondary supply). This reduces output noise
and the size of the decoupling capacitor.
Other features of MP2005 include thermal
overload and current limit protection, stability
with ultra low ESR ceramic capacitors as low as
1μF, and fast transient response. The MP2005
is available in a 8-pin QFN (2mm x 3mm)
package.
MP2005
800mA High PSRR, ULDO
Linear Regulator
FEATURES
• Wide 1.0V to 5.5V Input Voltage Range
• Stable with 1μF Ceramic Capacitor
• Ultra-Low Dropout (ULDO) voltage: 90mV@800mA
• 2% Accurate Output Voltage
• Adjustable Output Range of 0.5V to 4V
• High PSRR
o 65dB at 1KHz
o 48dB at 1MHz
• Better Than 0.0005%/mA Load Regulation
• Stable With Low-ESR Output Capacitors
• Low 100μA Ground Current
• Internal Thermal Protection
• Current Limit Protection
• 1µA Typical Quiescent Current at Shutdown
APPLICATIONS
• Low Current Regulators
• Low Power Handheld Devices
• Battery Powered Systems
• Cellular Phones
• Portable Electronic Equipment
• Post Regulation for Switching
Supplies
• Power Supplies
Power
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Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP2005 Rev. 0.92
www.MonolithicPower.com
1
5/5/2010
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