Summary of 2.8Vin to 22Vin, 2A lout, 4-Switch Integrated Buck-Boost Converter with I2C Interface
Monolithic Power Systems launched the MP8862, a 4-switch synchronous buck-boost converter supporting 2.8V to 22V input and 1V to 20.47V output. It delivers 2A output current with I2C-controlled voltage scaling (5mV/10mV resolution) and adjustable current limits. Operating up to 500kHz, it features auto PFM/PWM modes, fast transient response, and comprehensive protection including OVP, short circuit hiccup, and thermal shutdown in a compact 3x3mm QFN package. Ideal for USB PD sourcing and bus supplies.
Parts used in the MP8862 Project:
- Synchronous 4-switch integrated buck-boost converter
- I2C interface controller
- Four low RDS(on) internal buck power MOSFETs
- Internal sensing FET
- ALT pin
- 16-pin QFN package
Monolithic Power Systems has introduced a new synchronous, 4-switch integrated buck-boost converter, the MP8862. The converter can regulate the output voltage from a wide input voltage range of 2.8V to 22V with high efficiency. The converter supports an Iout of 2A. Vout ranges from a 1V minimum to a maximum of 20.47V with a 5mV resolution controlled through I2C. The device can operate at up to a maximum of 500kHz.
The converter’s integrated output voltage scaling and adjustable output current limit functions fit the USB Power Delivery (PD) requirement. Applications for the converter include USB PD sourcing ports and buck-boost bus supplies. (see image above of typical application diagram).
The converter features four low RDS(on) internal buck power MOSFETs and has an adjustable accurate CC output-current limit with an internal sensing FET via I2C.
In buck mode, the MP8862 uses constant-on-time control, and in boost mode, it uses constant-off-time control, providing fast load transient response as well as smooth buck-boost mode transient. MP8862 offers auto PFM/PWM or forced PWM switching modes and programmable output CC (Constant Current) current limit, which supports flexible design for different applications.
The MP8862 offers output OVP hiccup, output short circuitry protection with hiccup, and over temperature warning and shutdown. The converter is available in a 16-pin QFN package measuring 3mm by 3mm.
Features
- Wide 2.8V to 22V Operating Input-Voltage Range
- 1V to 20.47V Output Voltage Range (5V Default) with 10mV Resolution through I2C
- 2A Output Current
- Four Low RDS(on) Internal Buck Power MOSFETs
- Adjustable Accurate CC Output-Current Limit with Internal Sensing FET via I2C
- 500kHz Switching Frequency
- Output OVP Hiccup
- Output Short Circuitry Protection with Hiccup
- Over Temperature Warning and Shutdown
- 3.4MHz I2C Interface with ALT pin
Read more: 2.8Vin to 22Vin, 2A lout, 4-Switch Integrated Buck-Boost Converter with I2C Interface
- What is the input voltage range of the MP8862?
The device regulates output from a wide input voltage range of 2.8V to 22V. - How is the output voltage controlled?
Vout ranges from 1V minimum to 20.47V maximum with resolution controlled through I2C. - Can the MP8862 support USB Power Delivery requirements?
Yes, its integrated output voltage scaling and adjustable output current limit functions fit the USB PD requirement. - What control methods does the converter use in different modes?
In buck mode it uses constant-on-time control, and in boost mode it uses constant-off-time control. - Does the device offer automatic switching modes?
Yes, it offers auto PFM/PWM or forced PWM switching modes. - What protection features are included in the MP8862?
It includes output OVP hiccup, output short circuitry protection with hiccup, and over temperature warning and shutdown. - What is the maximum switching frequency supported?
The device can operate at up to a maximum of 500kHz. - Is the output current limit adjustable?
Yes, it has an adjustable accurate CC output-current limit with an internal sensing FET via I2C.
