Table of Contents
Advertisement
Recommended Operating Conditions
The ACT88325EVK1-101 is designed for a 3.3V input voltage. The maximum operating voltage is determined
by the IC's maximum input voltage rating. The minimum operating voltages are determined by the buck
converters' minimum input voltage and by the LDOs' dropout voltages. Maximum currents are determined by
the IC's CMI settings, which can be changed via I
Parameter
VIN
I
B1_max
I
B2_max
I
B3_max
I
LDO1_max
I
LDO2_max
Hardware Configuration
Input Voltage: Note that the ACT88325EVK1-101 uses the ACT88325VA101 IC. This IC can accept up to a
5.5V input voltage. However, the ACT88325VA101 IC is designed for a 3.3V input and shuts off if VIN goes
higher than 3.7V. Use the GUI to increase the SYSMON voltage to evaluate input voltages higher than 3.7V.
BUCK1: The ACT88325 BUCK1 output can be operated as a buck converter or in bypass mode. The CMI 101
is configured for bypass mode and passes the input voltage straight through to the output. Even though
BUCK1 is in bypass mode, the EVK still populates the BUCK1 inductor, L1, so other CMI options can be eas-
ily evaluated on the PCB.
ACT8310 External Supply:The EVK includes an external power supply, ACT8310, to demonstrate the ICs
sequencing capability. The ACT88325 EXT_EN output enables the ACT8310 at the proper time in the turn-on
sequencing. This external supply can be used to evaluate the flexible sequencing options in other CMI op-
tions.
DPSLP Function: The PWREN pinis configured to put the IC into DPSLP Mode to provide the SM2263 pro-
Innovative Power
TM
TM
ActiveSwitcher
is a trademark of Active-Semi.
Figure 4 – USB-TO-I2C Dongle Connection
2
C after startup.
Table1. Recommended Operating Conditions
Description
All buck input voltages
Maximum Buck 1 load current
Maximum Buck 2 load current
Maximum Buck 3 load current
Maximum LDO 1 load current
Maximum LDO 2 load current
4
UG125
Rev 1.0, 20-Jun-2018
Min
Typ
Max
Unit
2.7
5.5
V
4.0
A
3.0
A
2.0
A
0.3
A
0.3
A
Advertisement
Table of Contents
