MAX15053EVKIT+ Maxim Integrated Products, MAX15053EVKIT+ Datasheet - Page 2

• Manufacturer Part Number: MAX15053EVKIT+
• Description: Power Management Modules & Development Tools MAX15053 EVAL KIT MAX15053 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX15053EVKIT+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MAX15053 Evaluation Kit
Note: Indicate that you are using the MAX15053 when contacting these component suppliers.
• MAX15053 EV kit
• 5V, 2A DC power supply
• Load capable of 2A
• Digital voltmeter
The EV kit is fully assembled and tested. Follow
the steps below to verify the board operation.
Caution:_ Do_ not_ turn_ on_ power_ supply_ until_ all_ _
connections_are_completed.
1) Connect the positive terminal of the 5V supply to the
2) Connect the positive terminal of the 2A load to the
3) Connect the digital voltmeter across the OUT pad
4) Verify that a shunt is installed on pins 1-2 of jumper
5) Verify that a shunt is installed on pins 2-3 of jumper
6) Turn on the DC power supply.
7) Enable the load.
8) Verify that the voltmeter displays 1.8V.
The MAX15053 EV kit provides a proven design to
evaluate the MAX15053 high-efficiency, 2A, step-down
regulator with integrated switches. The applications
include distributed power systems, portable devices,
and preregulators. The EV kit is preset for 1.8V out-
put at load currents up to 2A from a 2.7V to 5.5V
input supply. The IC features a 1MHz fixed switching
frequency, which allows the EV kit to achieve an all-
ceramic capacitor design and fast transient responses.
2_ _ _______________________________________________________________________________________
Murata Electronics North America, Inc.
TDK Corp.
Vishay
Detailed Description of Hardware
IN pad and the negative terminal to the nearest PGND
pad.
OUT pad and the negative terminal to the nearest
PGND pad.
and the nearest PGND pad.
JU1.
JU3.
SUPPLIER
Recommended Equipment
Quick Start
Procedure
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The MAX15053 utilizes an adjustable soft-start function
to limit inrush current during startup. The soft-start time is
adjusted by the value of C4, the external capacitor from
SS/REFIN to GND. By default, C4 is currently 22000pF,
which gives a soft-start time of approximately 1.3ms. To
adjust the soft-start time, determine C4 using the follow-
ing formula:
where t
C4 is in farads. C4 should be a minimum 1nF capacitor
between SS/REFIN and GND.
When no external reference is applied at SS/REFIN,
the device uses the internal 0.6V reference. When an
external reference is used, soft-start needs to be pro-
vided externally.
The EV kit can be adjusted from 0.6V up to 0.94 x V
by changing the values of resistors R1 and R2. To
determine the value of the resistor-divider, first select R1
between 2kI and 10kI and then use the following equa-
tion to calculate R2:
where V
SS/REFIN and V
ence is applied at SS/REFIN, the internal reference is
automatically selected and V
case, R2 is not needed for V
When R2 is changed, compensation components
must be recalculated to ensure loop stability (refer to
the Compensation Design Guidelines section in the
MAX15053 IC data sheet).
The IC features an enable input. For normal operation, a
shunt should be installed on pins 1-2 of jumper JU1. To
disable the output, install a shunt on pins 2-3 of JU1. See
Table 1 for JU1 shunt positions.
Reference Input and Soft-Start (SS/REFIN)
SS
FB
is the required soft-start time in seconds and
R2 = (V
is equal to the reference voltage at
C4 = (10FA x t
OUT
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FB
Setting the Output Voltage
is the output. If no external refer-
Component Suppliers
x R1)/(V
Regulator Enable (EN)
OUT
FB
SS
WEBSITE
OUT
= 0.6V.
becomes 0.6V. In this
)/0.6V
- V
FB
)
IN