1A, 3-22V, 5μA IQ, Synchronous,
Step-Down Converter in 1.5x2mm QFN
The MP2322 is a synchronous, rectified, step-
down, switch-mode converter with built-in
internal power MOSFETs and high light-load
efficiency. The MP2322 offers a very compact
solution that achieves 1A of continuous output
current with excellent load and line regulation
over a wide input supply range.
The MP2322 switching edge is optimized for
EMI reduction. Constant-on-time (COT) control
provides seamless mode transition and a fast
load transient response.
Full protection features include over-current
protection (OCP), over-voltage protection
(OVP), and thermal shutdown.
The MP2322 requires a minimal number of
readily available, standard, external
components and is available in a space-saving
QFN-8 (1.5mmx2mm) package.
Wide 3V to 22V Operating Input Range
5µA Low IQ
1A Load Current
260mΩ/120mΩ RDS(ON) Internal Power
High Efficiency from 100µA to 1A Load
during VIN from 4V to 22V
Power-Save Mode (PSM) in Light-Load
1.25MHz Fixed Switching Frequency during
TON Extension to Support Large Duty Cycles
Power Good (PG) Indication
EN Shutdown Output Discharge
OCP and OVP and Hiccup
Output Adjustable from 0.6V
Available in a QFN-8 (1.5mmx2mm)
Home Automation, Home Security
Single- or Multi-Cell Li-Ion Battery Systems
Multi-Cell Dry Battery Systems
12V Input Power Rails
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”, the MPS logo, and “Simple, Easy Solutions” are
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
3.3 V/1 A
Efficiency vs. Output Current
VIN = 12V, VOUT = 3.3V, L = 3.3µH, DCR =
MP2322 Rev. 1.01
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