%I IEEE %B Proceedings of the IEEE Biomedical Circuits and Systems Conference (BioCAS) 2017 %X Emerging applications for implantable devices are requiring multi-unit systems with intrabody transmission of power and data through wireline interfaces. This paper proposes a novel method for power delivery within such a configuration that makes use of closed loop dynamic regulation. This is implemented for an implantable application requiring a single master and multiple identical slave devices utilising a parallel-connected 4-wire interface. The power regulation is achieved within the master unit through closed loop monitoring of the current consumption to the wired link. Simultaneous power transfer and full-duplex data communication is achieved by superimposing the power carrier and downlink data over two wires and uplink data over a second pair of wires. Measured results using a fully isolated (AC coupled) 4-wire lead, demonstrate this implementation can transmit up to 120 mW of power at 6 V (at the slave device, after eliminating any losses). The master device has a maximum efficiency of 80 % including a dominant dynamic power loss. A 6 V constant supply at the slave device is recovered 1.5 ms after a step of 22 mA. %A A Mifsud %A D Haci %A SS Ghoreishizadeh %A Y Liu %A TG Constandinou %T Adaptive power regulation and data delivery for multi-module implants %O This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. %D 2018 %C Turin, Italy %L discovery10063267 %K Implants, Uplink, Downlink, Wires, Communication cables, Sensors, Voltage measurement %V 2018-J %J 2017 IEEE Biomedical Circuits and Systems Conference, BioCAS 2017 - Proceedings