MPQ8875A
36V, 5A, Four-Switch, Synchronous
Buck-Boost Converter with I2C Interface,
AEC-Q100 Qualified
DESCRIPTION
FEATURES
The MPQ8875A is
a
36V, monolithic,
2.2V to 36V Wide Input Voltage Range
Up to 5A Continuous Output Current
<25μA Shutdown Current
180μA Quiescent Current when VIN = 12V
Single-Channel, Four-Switch, Synchronous
Buck-Boost Configuration:
o Internal 10mΩ Buck High-Side Power
MOSFET
o Internal 25mΩ Buck Low-Side
Synchronous Rectifier
synchronous buck-boost DC/DC converter. The
wide 2.2V to 36V input voltage range makes
this device well-suited for multi-purpose
automotive and industrial applications. The
proprietary constant-on-time (COT) control, as
well as the fully integrated, four-switch
configuration, allow the chip to flexibly change
the converter topology between buck, boost,
and buck-boost mode. This optimizes
performance and efficiency with input voltages
that are above, below, or equal to the output
voltage. It also ensures seamless transitions
between the adjacent operational regions.
o Internal 10mΩ Boost Low-Side Power
MOSFET
o Internal 25mΩ Boost High-Side
Synchronous Rectifier
Proprietary Constant-On-Time (COT)
Control for Seamless Transitions
Internal Soft-Start
Smart Power Good Output
Easy-to-Optimize Efficiency and EMI
Performance:
The MPQ8875A is controlled separately via a
standard I2C interface. The various parameters
can be adjusted by writing the settings to the
device without any hardware changes required.
The switching frequency can be configured
between 200kHz and 1MHz, or it can be
synchronized between 250kHz and 1MHz via
an external clock signal. In addition, the
configurable frequency spread spectrum
function can dither the switching frequency
periodically for improved EMI performance.
o Configurable 200kHz to 1MHz Switching
Frequency
o Synchronizable Switching Frequency
from 250kHz to 1MHz
o Switching Frequency Spread Spectrum
o Configurable Switching Speed
Protection Features:
Robust fault protections include input under-
voltage lockout (UVLO), input over-voltage
protection (OVP), cycle-by-cycle peak current
limiting, output OVP, output short-circuit
protection (SCP), and thermal shutdown. The
built-in power good function can indicate
whether the output voltage is regulated properly.
o Cycle-by-Cycle Current Limiting
o Over-Current Protection (OCP)
o Configurable Input Under-Voltage
Lockout (UVLO)
o Output Over-Voltage Protection (OVP)
o Input Over-Voltage Protection (OVP)
o Output Short-Circuit Protection (SCP)
o Over-Temperature Shutdown
The MPQ8875A is available in a thermally
enhanced QFN-34 (4mmx5mm) package.
MPQ8875A Rev. 1.0
1/4/2021
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
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