MAX17502ETEVKIT# Maxim Integrated, MAX17502ETEVKIT# Datasheet - Page 3

• Manufacturer Part Number: MAX17502ETEVKIT#
• Description: Power Management IC Development Tools MAX17502E Eval Kit
• Manufacturer: Maxim Integrated
• Type: DC/DC Converters, Regulators & Controllersr
• Series: MAX17502r

Specifications of MAX17502ETEVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX17502E
• Input Voltage: 4.5 V to 60 V
• Output Voltage: 3.3 V
• Output Current: 1 A
• For Use With: MAX17502E

The MAX17502E EV kit provides a proven design to
evaluate the MAX17502E high-efficiency, high-voltage,
synchronous step-down DC-DC converter. The EV kit
generates a fixed 3.3V, at load currents up to 1A,
from a 4.5V to 60V input supply. The EV kit features a
600kHz fixed switching frequency for optimum efficiency
and component size. EV kit features a forced-PWM
control scheme that provides constant switching-fre-
quency operation at all load and line conditions.
The EV kit includes an EN/UVLO PCB pad and jumper
JU1 to enable control of the converter output. An
additional RESET PCB pad is available for monitor-
ing the converter output. The VCC PCB pad helps
measure the internal LDO voltage.
The device utilizes an adjustable soft-start function to
limit inrush current during startup. The soft-start time is
adjusted by the value of C3, the external capacitor from
SS to GND. To adjust the soft-start time, determine C3
using the following formula:
where t
and C3 is in nanofarads.
Table 1. Regulator Enable (EN/UVLO) Jumper JU1 Settings
*Default position.
Maxim Integrated
Detailed Description of Hardware
SS
is the required soft-start time in milliseconds
SHUNT POSITION
Not installed
1-2*
2-3
C3 = 5.55 x t
Evaluate: MAX17502E in TDFN Package
Soft-Start Input (SS)
SS
Connected to the center node of
resistor-divider R1 and R2
Connected to GND
Connected to IN
EN/UVLO PIN
MAX17502E Evaluation Kit
The device features an EN/UVLO input. For normal
operation, a shunt should be installed across pins 1-2 on
jumper JU1. To disable the output, install a shunt across
pins 2-3 on JU1 and the EN/UVLO pin is pulled to GND.
See Table 1 for JU1 settings.
The devices offer an adjustable input undervoltage-
lockout level. Set the voltage at which the device turns
on with a resistive voltage-divider connected from VIN to
GND. Connect the center node of the divider to EN/UVLO.
Choose R1 to be 3.3MI and then calculate R2 as follows:
where V
to turn on.
Setting the Undervoltage-Lockout Level
INU
is the voltage at which the device is required
Regulator Enable/Undervoltage-
R2
through the R1 and R2 resistor-divider
=
(V
Lockout Level (EN/UVLO)
INU
R1 1.218
Enabled, UVLO level set
MAX17502_ OUTPUT
×
−
1.218)
Disabled
Enabled
3