MAX17501ETEEVKIT# Maxim Integrated, MAX17501ETEEVKIT# Datasheet - Page 3

• Manufacturer Part Number: MAX17501ETEEVKIT#
• Description: Power Management IC Development Tools MAX17501E/F Eval Kit
• Manufacturer: Maxim Integrated
• Type: DC/DC Converters, Regulators & Controllersr
• Series: MAX17501r

Specifications of MAX17501ETEEVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX17501E, MAX17501F
• Input Voltage: 4.5 V to 60 V
• Output Voltage: 3.3 V
• Output Current: 500 mA
• For Use With: MAX17501E, MAX17501F

The MAX17501A/MAX17501E EV kits provide proven
designs to evaluate the MAX17501A/MAX17501E high-
efficiency, high-voltage, synchronous step-down DC-DC
converters. The EV kits generate a fixed 3.3V, at load
currents up to 500mA, from a 4.5V to 60V input sup-
ply. The EV kits feature a 600kHz fixed switching fre-
quency for optimum efficiency and component size. The
MAX17501A EV kit supports a PFM control scheme with
high light-load efficiency, while the MAX17501E EV kit
features a forced-PWM control scheme that provides
constant switching-frequency operation at all load and
line conditions.
The EV kits include 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 devices utilize 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:
Table 1. Regulator Enable (EN/UVLO) Jumper JU1 Settings
*Default position.
Detailed Description of Hardware
SHUNT POSITION
Not installed
1-2*
2-3
C3 = 5.55 x t
Soft-Start Input (SS)
SS
Evaluate: MAX17501A/MAX17501E
Connected to the center node of
resistor-divider R1 and R2
Connected to GND
Connected to IN
EN/UVLO PIN
where t
and C3 is in nanofarads.
The devices feature 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
SS
INU
is the required soft-start time in milliseconds
is the voltage at which the device is required
in TDFN Packages
Regulator Enable/Undervoltage-
R2
through the R1 and R2 resistor-divider
=
(V
Lockout Level (EN/UVLO)
INU
R1 1.218
Enabled, UVLO level set
MAX17501_ OUTPUT
×
−
1.218)
Disabled
Enabled
3