Ultra-Low 500nA IQ, Wide Input 2-5.5V,
700mA Step-Down Regulator Plus 300nAIQ,
The Future of Analog IC Technology 2-5.5V Input, 100mA LDO in a 2x2mm QFN
The MP28301 is a monolithic power-
management unit containing a 700mA, high-
efficiency, step-down, switching converter and a
100mA LDO regulator. The nA quiescent
current provides extremely high efficiency when
the load current is in the µA range. With the
minimum input voltage as low as 2V, the
MP28301 allows the system to operate directly
from the battery.
The constant-on-time (COT) control scheme
provides fast transient response, high light-load
efficiency, and requires minimal capacitance.
The regulation is made tight by integrating an
error amplifier to correct the output voltage.
A 100mA LDO regulator provides easy system
configuration with a clean output voltage.
The CTRL pins control the on/off and output
voltage selection functions.
Fault protection features include under-voltage
lockout (UVLO), over-current protection (OCP),
and thermal shutdown.
The MP28301 requires a minimal number of
readily available, standard, external
components and is available in a small QFN-12
700mA Buck Switcher
o Ultra-Low IQ: 500nA
o Wide 2.0V to 5.5V Operating Input
o Seven Selectable Output Voltages
o Up to 700mA Output Current
o 1.5MHz Switching Frequency in
Continuous Conduction Mode (CCM)
o 100% Duty Cycle in Dropout
o 0.25Ω and 0.25Ω Internal Power
o Cycle-by-Cycle Over-Current Protection
o Short-Circuit Protection (SCP) with
o Ultra-Low IQ: 300nA
o 2.0V to 5.5V Operating Input Range
o Three Selectable Output Voltages
o Over-Temperature Protection (OTP)
Available in a QFN-12 (2mmx2mm)Package
All MPS parts are lead-free, halogen-free, and adhere to the RoHS
directive. For MPS green status, please visit the MPS website under
Quality Assurance. “MPS” and “The Future of Analog IC Technology” are
registered trademarks of Monolithic Power Systems, Inc.
Efficiency vs. Load Current
MP28301 Rev. 1.1
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