The Future of Analog IC Technology
19V, 4A, 40µA IQ, High-Efficiency
Constant-On-Time (COT) Step-Down
Converter in a 2mmx3mm QFN Package
The MP2326 is a fully integrated, high-efficiency,
synchronous, step-down, switch-mode converter
with only a 40μA quiescent current. This very
compact device achieves a 4A continuous output
current over a wide input-supply range with
excellent load and line regulation, and it operates
with high efficiency over a wide output current
load range. It’s optimized for battery-operated
applications and applications requiring high light-
With constant-on-time (COT) control, the
MP2326 provides very fast transient response,
easy loop design, and very tight output regulation.
Full protection features include SCP, OCP, UVP,
and thermal shutdown.
The MP2326 requires a minimal number of
readily available, standard, external components
with a space saving 2mmx3mm 14-pin QFN
3.9V to 19V Operating Input Range
4A Output Current
40μA Quiescent Current
Output Adjustable from 0.6V
90mΩ/30mΩ High Side/Low Side RDS(ON) for
Internal Power MOSFETs
Power Good Indicator
Programmable Soft-Start Time
Forced PWM or Auto PFM/PWM Mode
Programmable Switching Frequency
Short-Circuit Protection: Hiccup Mode
Available in a QFN-14 (2mmx3mm)
Solid State Drives
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.
MP2326 Rev. 1.2
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