UG109
Rev 3.0, 25-Sep-2018
Innovative Power
TM
ActiveSwitcher
TM
is a trademark of Active-Semi.
1
ACT8865EVK1-305 User’s Guide
Description
This document describes the characteristic and operation of the Active Semi ACT8865EVK1-305 evaluation kit
(EVK). It provides setup and operation instructions, schematic, layout, BOM, and test data. This EVK
demonstrates the ACT8865QI305 ActivePMU power management IC. Other ACT8865QIxxx options can be
evaluated on this EVK by replacing the IC and any other necessary components.
Features
The EVK can be used as a standalone board if desired. However, to access the internal registers and to take
full advantage of the IC’s capability, the user must connect the EVK kit to a PC with Active Semi’s USB-TO-I2C
interface dongle and use the GUI software. The EVK provides full access to the each converter’s input and
output voltage, as well as all the digital control signals. This gives the user the flexibility to configure the EVK
to match their real world system. The EVK features three step-down DC/DC converters and four low-noise, low-
dropout linear regulators. The three DC/DC converters utilize a high-efficiency, fixed-frequency (2MHz), current-
mode PWM control architecture that requires a minimum number of external components. Two DC/DCs are
capable of supplying up to 1150mA of output current, while the third supports up to 1300mA. All four low-dropout
linear regulators are high-performance, low-noise, regulators that supply up to320mA.Note that the
ACT8865AEVK1-305is specifically configured for the ACT8865QI305.
Figure 1 – EVK Picture
