MAX15048 Datasheet, PDF (3/7 Pages) Maxim Integrated Products – Evaluation Kit

MAX15049 Evaluation Kit
Quick Start
• MAX15049 EV kit
Required Equipment
• 12V, 10A power supply
• Four voltmeters
Procedure
The MAX15049 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 U1 is installed on the bottom side of the
PCB.
2) Connect the positive terminal of voltmeter 1 (VM1)
to the OUT1 pad. Connect the negative terminal of
VM1 to the GND1 pad.
3) Connect the positive terminal of voltmeter 2 (VM2)
to the OUT2 pad. Connect the negative terminal of
VM2 to the GND2 pad.
4) Connect the positive terminal of voltmeter 3 (VM3)
to the OUT3 pad. Connect the negative terminal of
VM3 to the GND3 pad.
5) Connect the positive terminal of voltmeter 4 (VM4)
to PGOOD (TP8) and the negative terminal to the
PGND pad.
6) Set the power supply to 12V and disable the output.
7) Connect the positive terminal of the power supply
to the VIN pad. Connect the negative terminal of the
power supply to the PGND pad.
8) Turn on the power supply.
9) Verify that the VOUT1, VOUT2, and VOUT3 outputs
measure 3.3V, 1.8V, and 1.2V, respectively.
10) Verify that PGOOD measures approximately 5V.
11) The EV kit is now ready for load testing. Use the
respective OUT_ connector load points for high-
current load testing.
Detailed Description of Hardware
The MAX15049 EV kit is a fully assembled and tested
PCB that demonstrates the MAX15049, which inte-
grates three high-performance PWM switching step-
down DC-DC controllers. The EV kit circuit operates over
the input-voltage range of 4.7V to 16V. The three outputs
are configured for 3.3V, 1.8V, and 1.2V and can provide
3A, 3A, and 6A, respectively. The EV kit outputs operate
in sequencing mode during startup and the three outputs
operate 120 degrees out of phase. The EV kit outputs
can start into prebiased loads. The EV kit switching fre-
quency is set to 500kHz with resistor R21. The switching
frequency can be programmed from 200kHz to 1.2MHz
by replacing this resistor. The EV kit has a PGOOD out-
put pad to indicate that all outputs have reached their
steady-state values. The EV kit PCB is designed in four
layers and 2oz copper for optimum performance.
Input Source
The MAX15049 EV kit is configured for normal operation
with an input power source of 4.7V to 16V and design
optimized for a 12V input voltage. The upper input-
voltage limit can be raised to 23V by replacing capaci-
tors C1, C2, C6, C16, and C38 with higher voltage-rated
capacitors. The EV kit circuit requires a minimum 4.7V
input voltage to start the power MOSFET switching.
MAX15049 Bias Input
The MAX15049 EV kit features an option to select the
bias input for the MAX15049 when configuring the EV kit
to operate with an input source less than 4.7V. Jumper
JU1 shorts the input-voltage source for the MAX15049 to
the controller REG pin. Without JU1 installed, the input-
voltage range in this configuration is 4.7V to 16V.
When operating the MAX15049 EV kit with a supply
between 4.5V to 5.5V, install jumper JU1.
Table 1. MAX15049 Bias Input Configuration (JU1)
SHUNT POSITION
Installed
Not installed
MAX15049 IN PIN
Connected to REG
Connected to VIN
MAX15049 EV KIT INPUT RANGE (V)
4.5 to 5.5
4.7 to 16
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