MAX77643EVKIT datasheet(8/22 Pages) MAXIM

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Evaluates: MAX77643

MAX77643 Evaluation Kit

Detailed Description of Hardware

(or Software)

On-Key Options

For applications that require the IC to enable with a user-

interactable switch, the EV kit comes with two common

types: the push-button (momentary) and the slide-switch

(persistent). The active-low enable pin (nEN) has an

internal pullup resistor. Select which type of switch to use

with jumper J3. Refer to the MAX77643 data sheet for

more information on configuring the IC for momentary or

persistent switches.

Changing the Output Voltages

The GUI allows the user to change the output voltages

of the SIMO and the LDO. Navigate to the “SIMO Buck-

Boost” section or the “LDO” section in the GUI. Drag the

“Target Output Voltage” slider until the desired output volt-

age is reached and click

Write.

Electronic Load

The EV kit comes with an electronic load allowing the user

to evaluate the SIMO and LDO load current capabilities.

On-board circuits set the load current through the I2C

interface. J201, J203, J205, J207 are used to connect the

load to the output of the SBB0, SBB1, SBB2, and LDO

respectively. To exercise the load transient response,

remove J200 (for SBB0), J202 (for SBB1), J204 (for

SBB2), and J206 (for LDO), and connect a signal genera-

tor to the gate of the load MOSFET (pin 2 of the respective

header). Drive the gate with a signal between 1V (off) and

3V (fully on) to apply transients to the output of the SIMO

or LDO. Note that there are 0.1Ω sense resistors with test

points (called VIL_SBB0, VIL_SBB1, and VIL_SBB2) and

a 1Ω sense resistor with a test point (called VIL_LDO) for

a 10:1 and 1:1 conversion of load current to voltage.

Figure 7. GPIO Input Value Box in GUI

Figure 8. SIMO Output Voltage Section

Figure 9. LDO Output Voltage Section

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