MP8845
5A, Highly Efficient, Synchronous,
Step-Down Switcher with I2C Interface
DESCRIPTION
FEATURES
The MP8845 is a highly integrated, high-
frequency, synchronous, step-down switcher with
an I2C control interface. The MP8845 can support
up to 5A of load current over a 2.7V to 6V input
supply range with excellent load and line
regulation.
2.7V to 6V Input Voltage Range
Up to 5A Load Current
Internal 28mΩ High-Side and 17mΩ Low-
Side Power MOSFETs
Fixed-Frequency Hysteretic Mode Control
I2C-Compatible Interface up to 3.4Mbps
I2C-Programmable Output Range from 0.6V
to 1.1V in 3.9mV Steps
Fixed-frequency hysteretic control mode provides
an extremely fast transient response without loop
compensation to achieve high efficiency easily
under light-load conditions.
Factory Adjustable Switching Frequency from
1MHz to 2.2MHz
I2C-Programmable Voltage Transition Slew
Rate
The output voltage level can be controlled on-
the-fly through a 3.4Mbps I2C serial interface.
The voltage range can be adjusted from 0.6V to
1.1V in 3.9mV steps. The voltage slew rate,
switching frequency, and power-saving modes
are also selectable through the I2C interface.
Power-Saving Mode Selectable via I2C
Internal Soft Start
Power Good Indicator
Current Overload and Thermal Shutdown
Protection
Available in 20-Ball WLCSP-20 (1.6mmx2mm)
Package
Full protection features include internal soft start,
over-current protection (OCP), and over-
temperature protection (OTP).
APPLICATIONS
The MP8845 requires a minimum number of
readily available, standard, external components
and is available in a compact WLCSP-20
(1.6mmx2mm) package.
Processor Core Supply
Micro Converter
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.
TYPICAL APPLICATION
L1
0.47µH
2.7V ~ 6V
0.6V ~1.1V
VO
SW
VIN
VIN
C1A C1B
C2A C2B
VOUT
R1
MP8845
47µF 47µF
22µF 0.1µF
100k
PG
EN
EN
SDA
I2C Bus
Up to 3.4Mbps
GND
{
SCL
AGND
MP8845 Rev. 1.1
2/23/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
1