MAX17531AUBEVKIT Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 5V Output Voltage Applications

MAX17531 5V Output
Evaluation Kit (µMAX)
Evaluates: MAX17531 (µMAX) in
5V Output Voltage Applications
General Description
The MAX17531 5V evaluation kit (EV kit) (µMAX) is a fully
assembled and tested circuit board that demonstrates the
performance of the MAX17531 42V, 50mA ultra-small,
high-efficiency, synchronous step-down DC-DC converter
in a 10-pin µMAX package. The EV kit operates over a
wide input voltage range of 6V to 42V and provides up to
50mA load current at 5V output. It draws only 26µA supply
current under no-load conditions (EN/UVLO connected to
VIN). The EV kit is programmed to switch at a frequency
of 300kHz. The device is simple to use and easily
configurable with minimal external components. It
features cycle-by-cycle peak current-limit protection,
undervoltage lockout, and thermal shutdown.
The EV kit comes installed with the MAX17531AUB+ in
a 10-pin (3mm x 3mm) lead(Pb)-free/RoHS-compliant
µMAX package.
Features
●● 6V to 42V Input Voltage Range
●● 5V Output, 50mA Continuous Current
●● 26µA No-Load Supply Current
●● EN/UVLO for On/Off Control and Programmable
Input Undervoltage Lockout
●● Programmable Switching Frequency
●● Internal or Programmable Soft-Start
●● PFM or Forced-PWM Mode of Operation
●● Open-Drain RESET Output
●● Peak Current-Limit Protection
●● Thermal Shutdown
●● Proven PCB Layout
●● Fully Assembled and Tested
Quick Start
Recommended Equipment
●● MAX17531 5V EV kit (µMAX)
●● 42V adjustable, 0.5A DC power supply
●● Electronic load up to 50mA
●● Voltmeter
Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation. Caution: Do not turn on
the power supply until all connections are completed.
1) Verify that shunts are installed on jumpers JU1, JU2
(EN/UVLO).
2) Verify that jumper JU3 (MODE-PFM operation) is open.
3) Set the electronic load to constant-current mode,
50mA, and disable the electronic load.
4) Connect the electronic load’s positive terminal to the
VOUT PCB pad. Connect the negative terminal to
the GND PCB pad.
5) Connect the voltmeter across the VOUT and GND
PCB pads.
6) Set the power-supply output to 24V. Disable the
power supply.
7) Connect the power-supply output to the VIN PCB
pad. Connect the supply ground to the GND PCB
pad.
8) Turn on the power supply.
9) Enable the electronic load and verify that output volt-
age is 5V with respect to GND.
10) Vary the input voltage from 6V to 42V.
11) Vary the load current from 1mA to 50mA and verify
that output voltage is 5V with respect to GND.
Note: While performing an output short-circuit test, it is
possible for the ceramic output capacitor to oscillate with
the wiring inductance between the capacitor and short-
circuited load, and thereby cause the absolute maximum
rating of the VOUT pin (-0.3V) to be exceeded. The
resistor (R7) and the capacitor (C5) are included in this
evaluation kit to protect against unintentional violation of
the above-mentioned rating. In the actual system design,
parasitic board or wiring inductance should be minimized,
and the output-voltage waveform under short-circuit
operation should be verified, to ensure that the absolute
maximum rating of the VOUT pin is not exceeded.
Ordering Information appears at end of data sheet.
μMAX is a registered trademark of Maxim Integrated Products, Inc.
19-8759; Rev 0; 1/17