1A, Synchronous, Step-Down Converter
The MP21148 is a monolithic, step-down,
switch-mode converter with built-in, internal
power MOSFETs. It can achieve 1A of
continuous output current from a 2.3V-to-5.5V
input voltage with excellent load and line
regulation. The output voltage can be regulated
as low as 0.6V.
The constant-on-time control scheme in forced
CCM provides a fast transient response, low
output voltage ripple, and eases loop
stabilization. Fault protections include cycle-by-
cycle current limiting and thermal shutdown.
The MP21148 is available in an ultra-small
QFN-6 (1.0mmx1.5mm) package and requires
a minimal number of readily available, standard,
The MP21148 is ideal for a wide range of
applications including high-performance DSPs,
wireless power, portable and mobile devices,
and other low-power systems.
2.4MHz Switching Frequency
EN for Power Sequencing
Wide 2.3V-to-5.5V Operating Input Range
Output Adjustable from 0.6V
Up to 1A of Output Current
120mΩ and 80mΩ Internal Power MOSFET
100% Duty Cycle
Short-Circuit Protection (SCP) with Hiccup
Stable with Low ESR Output Ceramic
Available in a QFN-6 (1.0mmx1.5mm)
Continuous Conduction Mode (CCM)
Portable and Mobile Devices
Battery-Powered /Wearable Devices
Low-Voltage I/O System Power
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.
MP21148 Rev. 1.1
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