MP4316A
45V, 6A, Low-IQ, Synchronous
Step-Down Converter with
Frequency Spread Spectrum
DESCRIPTION
FEATURES
The MP4316A is a frequency-configurable,
synchronous, step-down switching converter
with integrated internal high-side and low-side
power MOSFETs. The device provides 6A (or
less) of highly efficient output current (IOUT) with
current mode control for fast loop response.
•
Designed for Automotive Applications:
o Wide 3.3V to 45V Operating Voltage
Range
o 6A Continuous Output Current (IOUT
o 100ns Minimum On Time
)
o Junction Temperature Operation from
-40°C to +125°C
Increases Battery Life:
o 1.7μA Low Shutdown Supply Current
o 18μA Sleep Mode Quiescent Current
o AAM Mode Increases Efficiency under
Light Loads
High Performance for Improved Thermals:
o Internal 48mΩ High-Side and 20mΩ
Low-Side MOSFET
The wide 3.3V to 45V input voltage (VIN) range
•
accommodates
a
variety of step-down
applications in automotive input environments. A
1.7μA shutdown mode quiescent current allows
the device to be used in battery-powered
applications.
•
•
The device achieves high power conversion
efficiency across the wide load range by scaling
down the switching frequency (fSW) under light-
load conditions to reduce the switching and gate
driving losses.
Optimized for EMC/EMI:
o 350kHz to 1000kHz Configurable
Switching Frequency (fSW) for Car
Battery Applications
o Can Be Synchronized to External Clock
o Out-of-Phase Synchronized Clock
Output
o Frequency Spread Spectrum (FSS)
Modulation
o Symmetric VIN Pinout
o CISPR25 Class 5 Compliant
o MeshConnectTM Flip-Chip Package
Additional Features:
o Power Good Output
o External Soft-Start
An open drain power good signal indicates when
the output is within 95% to 105% of its nominal
voltage.
Frequency foldback helps prevent inductor
current runaway during start-up. Thermal
shutdown provides reliable, fault-tolerant
operation.
The device provides a high duty cycle and low-
dropout mode for automotive cold-crank
conditions.
•
The MP4316A is available in a QFN-20
(4mmx4mm) package.
o Selectable AAM Mode or FCCM
o Low-Dropout Mode
o Hiccup Over-Current Protection (OCP)
o Available in a QFN-20 (4mmx4mm)
Package with Wettable Flank
APPLICATIONS
•
•
•
•
Radios
Battery-Powered Systems
General-Purpose Consumer Applications
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.
MP4316A Rev. 1.0
7/29/2022
MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2022 MPS. All Rights Reserved.
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