2A, Synchronous, Step-Down Converter
with Low 11µA Quiescent Current
in SOT563 Package
The MP1605 is a monolithic, step-down, switch-
mode converter with built-in, internal power
MOSFETs. It achieves 2A of 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 provides
a fast transient response and eases loop
stabilization. Full protection features include
cycle-by-cycle current limiting and thermal
The MP1605 is available in an ultra-small
SOT563 package and requires a minimal
number of readily available, standard, external
The MP1605 is ideal for a wide range of
applications, including high-performance DSPs,
wireless power, portable and mobile devices,
and other low-power systems.
Low IQ: 11μA
2.2MHz Switching Frequency
EN for Power Sequencing
Wide 2.3V to 5.5V Operating Input Range
Output Adjustable from 0.6V
Up to 2A Output Current
120mΩ and 80mΩ Internal Power MOSFET
Short-Circuit Protection (SCP) with Hiccup
Stable with Low ESR Output Ceramic
Available in a SOT563 Package
100% Duty Cycle
Portable and Mobile Devices
Low-Voltage I/O System Power
Solid-State Drives (SSDs)
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.
MP1605 Rev. 1.0
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