MP4573
60V, 2.5A, Fully Integrated, High-Efficiency,
Synchronous Buck Converter
DESCRIPTION
FEATURES
The MP4573 is a fully integrated, fixed-
frequency, synchronous step-down converter. It
can achieve up to 2.5A of continuous output
current with peak current control for excellent
transient response.
Wide 4.5V to 60V Operating Input Range
2.5A Continuous Output Current
High-Efficiency, Synchronous Mode Control
250mΩ/45mΩ Internal Power MOSFETs
Up to 2.2MHz Configurable Frequency
180° Out-of-Phase SYNCO Clock
40μA Quiescent Current (IQ)
The wide 4.5V to 60V input voltage range
accommodates
a
variety of step-down
applications in automotive input environments.
The device’s 2μA shutdown current also makes
it ideal for battery-powered applications.
Low 2μA Shutdown Current
FB Tolerance: 1% at Room Temp, 2% at
across the Full Temperature Range (-40°C
to +125°C)
Selectable Advanced Asynchronous
Modulation (AAM) Mode or Forced
Continuous Conduction Mode (FCCM)
during Light-Load Operation
0.45ms Internal Soft Start (SS)
Remote Enable (EN) Control
Power Good (PG) Indicator
The MP4573’s integrated internal high-side and
low-side power MOSFETs (HS-FET and LS-FET,
respectively) provide high efficiency without the
need for an external Schottky diode. Advanced
asynchronous modulation (AAM) mode achieves
high efficiency under light-load conditions by
scaling down the frequency to reduce switching
and gate driver losses.
Low-Dropout (LDO) Mode
Features include built-in soft start (SS), enable
(EN) control, and power good (PG) indication.
High duty cycle and low-dropout (LDO) mode
enable the device to withstand automotive cold
crank conditions.
Over-Current Protection (OCP)
Short-Circuit Protection (SCP) with Hiccup
Mode
VIN Under-Voltage Lockout (UVLO)
Thermal Shutdown
Available in a QFN-12 (2.5mmx3mm)
Package
Available in a Wettable Flank Package
The MP4573 employs over-current protection
(OCP) with valley current detection to avoid
current runaway. It also features short-circuit
protection (SCP) with hiccup mode, input under-
voltage lockout (UVLO), and auto-recovery
thermal protection.
APPLICATIONS
Infotainment Systems
Lamps and LEDs
Motor Controls
With internal compensation, the MP4573 offers
an ultra-compact solution that requires a minimal
number of readily available, standard external
components. It is available in a QFN-12
(2.5mmx3mm) package.
Industrial Power Systems
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.
MP4573 Rev. 1.0
3/29/2021
MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
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