2.85V - 18V, 6A, High-Efficiency, Wide-Input, Synchronous, Step-Down Converter

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2.85V - 18V, 6A, High-Efficiency, Wide-Input, Synchronous, Step-Down Converter with Integrated Telemetry via I²C Interface

The MP8861 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with an I²C control interface. The MP8861 offers a fully integrated solution that achieves 6A of continuous output current with excellent load and line regulation over a wide input supply range.

The output voltage level can be controlled on-the-fly through an I²C serial interface. The reference voltage range can be adjusted from 0.6V to 1.108V in 4mV steps. The voltage slew rate, frequency, current limit, hiccup/latch-off protection, enable, and power-save mode (PSM) are also selectable through the I²C interface.

Constant-on-time (COT) control operation provides fast transient response. An open-drain power good (PG) pin indicates that the output voltage is in the nominal range. Full protection features include over-voltage protection (OVP), over-current protection (OCP), and thermal shutdown.

The MP8861 is available in a QFN-14 (3mmx4mm) package.

• Solid-State Drives (SSD)
• Flat-Panel Televisions and Monitors
• Digital Set-Top Boxes
• Distributed Power Systems
• Networking/Servers

Symmetry Electronics is an authorized Monolithic Power Systems distributor.


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Wide 2.85V to 18V Operating Input Range
6A Continuous Output Current
1% Internal Reference Accuracy
IC Programmable Reference Range from 0.6V to 1.108V in 4mV Steps with Slew Rate Control
5% Accuracy Output Voltage and Output Current Monitoring via IC
Selectable PFM/PWM Mode, Adjustable Frequency and Current Limit through IC
Four Different Selectable IC Addresses
External Soft Start (SS)
Open-Drain Power Good (PG) Indication
Output Over-Voltage Protection (OVP)
Hiccup/Latch-Off Over-Current Protection (OCP)
VOUT Adjustable up to 5.5V using FB pin
Available in a QFN-14 (3mmx4mm) Package


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Monolithic Power Systems Datasheet