2024年6月13日发(作者：智雅娴)
MAX38886EVKIT#
Click here for production status of specific part numbers.
MAX38886 Evaluation Kit
General Description
The MAX38886 evaluation kit (EV kit) evaluates the
MAX38886 IC. The MAX38886 is a super cap backup
regulator designed to transfer power between a super
cap and a system supply rail. When the main battery is
present and above the minimum system supply voltage,
the regulator charges the super cap at up to a 500mA
rate. Once the super cap is charged, the circuit draws only
3μA of current while it maintains the super cap in its ready
state. When the main battery is removed, the regulator
prevents the system from dropping below the minimum
operating voltage, discharging the super cap at up to a
2.5A peak inductor current. Multiple MAX38886 ICs can
be connected in parallel for higher current applications.
The MAX38886 is externally programmable for mini-
mum and maximum super cap voltage, minimum system
voltage, and maximum charge and discharge currents.
The internal DC-DC converter requires only a 1μH induc-
tor and a 22μF capacitor.
Features
● 2.99V to 3.36V System Output Voltage Range
● 0.5V to 2.71V Super Cap Voltage Range
● 2.5A Peak Discharge Current
● Resistor-Adjustable Voltage and Current Thresholds
● Proven 2-Layer, 2oz Copper PCB Layout
● Compact Solution Size
● Fully Assembled and Tested
MAX38886 EV Kit Files
FILEDESCRIPTION
MAX38886 EV BOMEV Kit Bill of Material
MAX38886 EV PCB LayoutEV Kit Layout
MAX38886 EV SchematicEV Kit Schematic
Ordering Information appears at end of data sheet.
319-100532; Rev 0; 5/20
Evaluates: MAX38886
Quick Start
Required Equipment
● MAX38886 EV kit
● 5V, 3A DC power supply
● One digital multimeter (DMM)
Procedure
The EV kit is fully assembled and tested. Use the follow-
ing steps to verify board operation:
Caution: Do not turn on power supply until all con-
nections are completed.
1) Verify that a shunt is installed onto pins 1 and 2 and
jumper JU1 (EV kit enabled).
2) Verify that jumper JU2 is opened (No load is connect-
ed across VSYS and PGND).
3) Set the power supply output to 3.4V, and disable the
power supply.
4) Connect the power supply between the VSYS and
PGND terminal posts.
5) Connect the DMM between the VSC and PGND
terminal posts.
6) Enable the power supply and verify that the super cap
voltage at VSC is ramping up and stops at about 2.7V.
7) Disable and disconnect the power supply from the
VSYS and PGND terminal posts.
8) Verify that VSYS drops to about 3V and VSC drops
to about 2.5V.
9) Install jumper JU2. This connects a 51Ω load across
VSYS and PGND.
10) Verify that VSYS remains at 3V while VSC is ramping
down toward 0.5V.
11) Verify that VSYS is 0V when VSC drops below 0.5V.
2024年6月13日发(作者：智雅娴)
MAX38886EVKIT#
Click here for production status of specific part numbers.
MAX38886 Evaluation Kit
General Description
The MAX38886 evaluation kit (EV kit) evaluates the
MAX38886 IC. The MAX38886 is a super cap backup
regulator designed to transfer power between a super
cap and a system supply rail. When the main battery is
present and above the minimum system supply voltage,
the regulator charges the super cap at up to a 500mA
rate. Once the super cap is charged, the circuit draws only
3μA of current while it maintains the super cap in its ready
state. When the main battery is removed, the regulator
prevents the system from dropping below the minimum
operating voltage, discharging the super cap at up to a
2.5A peak inductor current. Multiple MAX38886 ICs can
be connected in parallel for higher current applications.
The MAX38886 is externally programmable for mini-
mum and maximum super cap voltage, minimum system
voltage, and maximum charge and discharge currents.
The internal DC-DC converter requires only a 1μH induc-
tor and a 22μF capacitor.
Features
● 2.99V to 3.36V System Output Voltage Range
● 0.5V to 2.71V Super Cap Voltage Range
● 2.5A Peak Discharge Current
● Resistor-Adjustable Voltage and Current Thresholds
● Proven 2-Layer, 2oz Copper PCB Layout
● Compact Solution Size
● Fully Assembled and Tested
MAX38886 EV Kit Files
FILEDESCRIPTION
MAX38886 EV BOMEV Kit Bill of Material
MAX38886 EV PCB LayoutEV Kit Layout
MAX38886 EV SchematicEV Kit Schematic
Ordering Information appears at end of data sheet.
319-100532; Rev 0; 5/20
Evaluates: MAX38886
Quick Start
Required Equipment
● MAX38886 EV kit
● 5V, 3A DC power supply
● One digital multimeter (DMM)
Procedure
The EV kit is fully assembled and tested. Use the follow-
ing steps to verify board operation:
Caution: Do not turn on power supply until all con-
nections are completed.
1) Verify that a shunt is installed onto pins 1 and 2 and
jumper JU1 (EV kit enabled).
2) Verify that jumper JU2 is opened (No load is connect-
ed across VSYS and PGND).
3) Set the power supply output to 3.4V, and disable the
power supply.
4) Connect the power supply between the VSYS and
PGND terminal posts.
5) Connect the DMM between the VSC and PGND
terminal posts.
6) Enable the power supply and verify that the super cap
voltage at VSC is ramping up and stops at about 2.7V.
7) Disable and disconnect the power supply from the
VSYS and PGND terminal posts.
8) Verify that VSYS drops to about 3V and VSC drops
to about 2.5V.
9) Install jumper JU2. This connects a 51Ω load across
VSYS and PGND.
10) Verify that VSYS remains at 3V while VSC is ramping
down toward 0.5V.
11) Verify that VSYS is 0V when VSC drops below 0.5V.