Monolithic Power Systems (MPS) MP8864 Synchronous Step-Down Converter
Monolithic Power Systems (MPS) MP8864 Synchronous Step-Down Converter is a high-frequency, rectified, step-down, switch-mode converter with an I2C control interface. The compact solution achieves a 4A continuous output current with excellent load/line regulation over a wide input supply range. The MP8864 has synchronous mode operation for higher efficiency over the output load range.
The reference voltage level is controlled, on-the-fly through a 3.4Mbps I2C serial interface. The voltage range can be adjusted from 0.6V to 1.87V in 10mV steps. Also, the voltage slew rate, switching frequency, enable, and power-saving mode is selectable through the I2C interface. Current-mode operation provides a fast transient response and eases loop stabilization. Full protection features include over-current protection (OCP), over-voltage protection (OVP), and thermal shutdown (TSD).
The MP8864 requires a minimal number of readily available, standard external components and is available in a 15-pin QFN15 (3mm x 3mm) package.
Features
- Wide 4.5V to 21V operating input range
- 50mΩ/23mΩ low RDS(ON) internal power MOSFETs
- 1% VOUT accuracy
- I2C programmable reference voltage range from 0.6V to 1.87V in 10mV steps with slew-rate control
- I2C selectable switching frequency, 600kHz default switching frequency
- Programmable output voltage
- Power-saving mode, OTP, and OCP via the I2C
- Power good indication
- 1-Bit I2C address set pin
- OCP in hiccup mode
- External soft-start
- Available in a QFN-15 3mm x 3mm package
Applications
- SoC and media processors
- General consumer
- Distributed power systems
Specifications
- Buck topology
- 5.2V output voltage
- 4A output current
- 500µA quiescent current
- -40°C to +125°C operating temperature range
Typical Application
Associated Development Tools
Monolithic Power Systems (MPS) EVKT-88x Evaluation Kits
Development tools for the MP88x synchronous, step-down switchers.
Monolithic Power Systems (MPS) EV8864-Q-00A Evaluation Board
Evaluates the performance of the MP8864, a high frequency, synchronous, step-down switcher.