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MP8859 Datasheet Preview

MP8859 Datasheet

Integrated Buck-Boost Converter

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DESCRIPTION
The MP8859 is a synchronous, 4-switch,
integrated buck-boost converter capable of
regulating the output voltage from a 2.8V to 22V
wide input voltage range with high efficiency.
The integrated output voltage scaling and
adjustable output current limit functions meet the
USB power delivery (PD) requirement.
The MP8859 uses constant-on-time (COT)
control in buck mode and constant-off-time
control in boost mode, providing fast load
transient response and smooth buck-boost
mode transient. The MP8859 provides auto
PFM/PWM or forced PWM switching modes,
programmable output constant current (CC)
current limit, which supports flexible design for
different applications.
Full protection features include over-current
protection (OCP), over-voltage protection
(OVP), under-voltage protection (UVP),
programmable soft start, and thermal shutdown.
The MP8859 is available in a 16-pin QFN
(3mmx3mm) package.
MP8859
2.8 - 22V VIN, 3A IOUT, 4-Switch,
Integrated Buck-Boost Converter
with I2C Interface
FEATURES
Wide 2.8V to 22V Operating Input Voltage
Range
1V (1) to 20.47V Output Voltage Range (5V
Default) with 10mV Resolution through I2C
3A Output Current or 4A Input Current
Four Low RDS(ON) Internal Buck Power
MOSFETs
Adjustable Accurate CC Output Current
Limit with Internal Sensing MOSFET via I2C
500kHz Switching Frequency
Output Over-Voltage Protection (OVP)
Hiccup
Output Short-Circuit Protection (SCP) with
Hiccup
Over-Temperature Warning and Shutdown
I2C Interface with ALT Pin
Four Programmable I2C Addresses
One-Time Programmable (OTP) Non-
Volatile Memory
I2C Programmable Line Drop
Compensation, PFM/PWM Mode, Soft Start,
OCP, etc.
EN Shutdown Discharge Programmable
Available in a QFN-16 (3mmx3mm)
Package
UL Certified, UL2367: E322138
UL60950-1/ UL60950-1-07: E500002-A1-
CB-1
APPLICATIONS
USB PD Sourcing Ports
Buck-Boost Bus Supplies
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.
NOTE:
1) For VOUT < 3V applications, the switching frequency decreases.
MP8859 Rev 1.0
www.MonolithicPower.com
1
7/20/2018
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2018 MPS. All Rights Reserved.




MPS

MP8859 Datasheet Preview

MP8859 Datasheet

Integrated Buck-Boost Converter

No Preview Available !

MP8859 22V VIN, 3A IOUT, INTEGRATED BUCK-BOOST WITH I2C INTERFACE
TYPICAL APPLICATION
C4 100nF
VIN
12V
+ C1
100µF
C1A
22µF
VCC
IN
R3
499kΩ
EN
C7
22nF
BST1 SW1
BST2
SW2
OUT
MP8859
R4
499kΩ
R5
301kΩ C3
1µF
ADD
VCC
AGND
ALT
I2C slave
SCL
SDA
GND OC
L1 4.7µH
C5 100nF
VOUT
C2A
+ C2
10µFx2 100µF
R1
21.5kΩ
C6
22nF
Efficiency vs. Output Current
VIN = 12V, VOUT = 5 - 20V, Forced PWM
Mode
100
95
90
85
80
75
70
65
60
0.01
VOUT=12V
VOUT=20V
VOUT=9V
VOUT=5V
0.1
1
10
OUTPUT CURRENT (A)
MP8859 Rev 1.0
www.MonolithicPower.com
2
7/20/2018
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2018 MPS. All Rights Reserved.


Part Number MP8859
Description Integrated Buck-Boost Converter
Maker MPS
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MP8859 Datasheet PDF






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