MAX17681EVKITD Datasheet, PDF (1/11 Pages) Maxim Integrated Products – Evaluates: MAX17681 for Isolated +7V or +5V Output Configuration

MAX17681 Evaluation Kit
Evaluates: MAX17681 for Isolated
+7V or +5V Output Configuration
General Description
The MAX17681EVKITD is a fully assembled and tested
circuit board that demonstrates the performance of the
MAX17681 high-efficiency, iso-buck DC-DC converter.
The EV kit operates over a wide input-voltage range of
17V to 36V and uses primary-side feedback to regulate
the output voltage. The EV kit has two output configurations.
In the first configuration, the output is programmed to
+7V at 200mA, with ±10% output voltage regulation. The
second configuration uses a post regulator (MAX17651)
to produce +5V at 100mA with at least ±3% regulation.
The EV kit comes installed with the MAX17681 in a 10-pin
(3mm x 2mm) TDFN package and MAX17651 in a 6-lead
TSOT package.
Features
●● 17V to 36V Input Voltage Range
●● +7V, 200mA or +5V, 100mA Continuous Current
●● EN/UVLO Input
●● 200kHz Switching Frequency
●● Overcurrent Protection
●● No Optocoupler
●● Delivers up to 1.4W Output Power
●● Overtemperature Protection
●● Proven PCB Layout
Ordering Information appears at end of data sheet.
Quick Start
Recommended Equipment
●● One 15V–60V DC, 0.5A power supply
●● Two resistive loads of 200mA sink capacity
●● Four digital multimeters (DMM)
Caution: Do not turn on the power supply until all
connections are completed.
Procedure
The EV kit comes with the default output configuration
programmed to +7V.
Test Procedure for +7V Output
1) Verify that J1 is open.
2) Verify that the R7 and R14 are not installed.
3) Set the power supply output to 24V. Disable the
power supply.
4) Connect the positive terminal of the power supply to
the VIN PCB pad and the negative terminal to the
nearest PGND PCB pad. Connect a 200mA resistive
load across the +7V PCB pad and the GND0
PCB pad.
5) Connect a DMM configured in voltmeter mode
across the +7V PCB pad and the nearest GND0
PCB pad.
6) Enable the input power supply.
7) Verify that output voltage is at +7V (with allowable
tolerance of ±10%) with respect to GND0.
8) If required, vary the input voltage from 17V to 36V, and
the load current from 0mA to 200mA and verify that output
voltage is at +7V (with allowable tolerance of ±10%).
19-8425; Rev 0; 2/16