The Future of Analog IC Technology
Buck-Boost Converter with 4.2A Switches
The MP28164 is a high-efficiency, low-
quiescent current, buck-boost converter that
operates from an input voltage above, equal to,
or below the output voltage. The device
provides a compact solution for products
powered by one-cell Lithium-Ion or multi-cell
alkaline batteries where the output voltage is
within the battery voltage range.
The MP28164 uses current-mode control with
fixed PWM frequency for optimal stability and
transient response. The fixed 2MHz switching
frequency and integrated low RDS(ON) MOSFETs
minimize the solution footprint while maintaining
To ensure the longest possible battery life, the
MP28164 uses an optional pulse skipping mode
that reduces the switching frequency under
light-load conditions. For other low-noise
applications where pulse skipping mode may
cause interference, a high-logic input on
MODE/SYNC guarantees fixed-frequency PWM
operation under all load conditions.
The MP28164 operates with an input voltage
from 1.2V to 5.5V to provide an adjustable
output voltage from 1.5V to 5V. With an input
from 2.5V to 5.5V, the device can supply 2A of
current to the load with a 3.3V output voltage.
The MP28164 is available in a small QFN-11
1.8V Minimum Start-Up Input Voltage
1.2V to 5.5V Input Work Range
1.5V to 5V Output Range
4.2A Switching Current Limit
3.3V/2A Load Capability from a 2.5V-to-
5.5V Input Supply
2MHz Fixed or External Synchronous
Selectable PSM/PWM Mode
Typical 25μA Quiescent Current
High Efficiency up to 95%
Load Disconnect during Shutdown
Internal Soft Start and Compensation
Power Good Indicator
Hiccup Mode for Short-Circuit Protection
Over-Temperature Protection (OTP)
Available in a Small QFN-11 (2mmx3mm)
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.
MP28164 Rev. 1.0
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.