MAX15008EVKIT+ Maxim Integrated Products, MAX15008EVKIT+ Datasheet - Page 4

• Manufacturer Part Number: MAX15008EVKIT+
• Description: Power Management Modules & Development Tools KIT EVAL FOR MAX15008 REG
• Manufacturer: Maxim Integrated Products

Specifications of MAX15008EVKIT+

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

The MAX15008 voltage tracker input power supply, of
up to 40V, must be connected to the TRACK PCB pad.
The tracker output (OUT_TRK) can source up to 50mA
and is configured to track the OUT_LDO output voltage
by connecting the ADJ pin to OUT_LDO through resis-
tor R3, and connecting the FB_TRK pin to OUT_TRACK
through resistor R5. The ADJ pin voltage setting sets
the feedback tracker voltage threshold at the FB_TRK
pin. This feature offers the flexibility of setting the track-
er output at a lower, equal to, or higher than OUT_LDO
output voltage. Use the following equations to select
new resistor values for R3–R6 to reconfigure the
OUT_TRACK tracking voltage:
where OUT_LDO is the LDO output voltage, V
voltage setting at the ADJ pin, V
voltage, which equals the voltage set at the ADJ pin,
and OUT_TRK is the new tracking voltage. V
be greater than 1.1V and less than TRACK - 0.5V. If
installed, resistors R4 and R6 must be less than or equal
to 50kΩ. V
(0603 size) surface-mount resistor at R13. If the tracker
output-voltage setting exceeds 35V, capacitor C6 must
be replaced with a higher voltage-rated capacitor.
The voltage tracker can be enabled or disabled by
configuring jumper JU3. See Table 2 for jumper JU3
configuration.
MAX15008 Evaluation Kit
Table 2. Voltage Tracker (Jumper JU3)
4
SHUNT STATUS
Not installed
_______________________________________________________________________________________
Installed
ADJ
R
V
V
FB TRK
ADJ
5
R
can be set to 1.235V by installing a 0Ω
5
=
_
Connected to ground
=
R
SGND with internal
=
V
R
6
Connected to IN
FB TRK
OUT LDO
6
×
EN_TRK PIN
×
⎛
⎜
⎝
=
_
pulldown
OUT TRK
⎛
⎜
⎝
V
V
OUT TRK
_
ADJ
FB TRK
V
FB TRK
=
_
_
V
_
_
Voltage Tracker Enable
ADJ
⎛
⎜
⎝
FB_TRK
R
3
Voltage Tracker
R
−
+
4
1
−
R
⎞
⎟
⎠
1
4
⎞
⎟
⎠
is the feedback
⎞
⎟
⎠
TRACKER
VOLTAGE
Disabled
Enabled
ADJ
ADJ
is the
must
The MAX15008 EV kit overvoltage protector is config-
ured to operate in overvoltage switch mode. When the
circuit detects an overvoltage condition at the IN2 input
(or IN if IN2 is not separated from IN), the IC turns off n-
channel MOSFET N1 to isolate the power source from
the load. When the voltage at the IN2 input decreases
below the overvoltage threshold, the MAX15008 turns
on N1, reconnecting the power source to the load. The
overvoltage threshold is configured to 17.7V by resis-
tors R9 and R10. Use the following equation to select
new resistor values to modify the overvoltage switch
mode overvoltage threshold:
where R10 is typically 10kΩ and OUT_PROTECT is the
desired overvoltage threshold.
The EV kit overvoltage protector can be reconfigured to
operate in overvoltage-limiter mode by cutting open the
shorting trace at resistor R15 and installing a 0Ω resistor
at R14. In this mode, when the circuit detects an overvolt-
age condition at the output load (OUT_PROTECT), the IC
turns off N1 until the load lowers the OUT_PROTECT
voltage below the overvoltage threshold. If the IN2 volt-
age is greater than the overvoltage threshold, the IC will
attempt to regulate the OUT_PROTECT voltage around
this threshold.
The overvoltage threshold for overvoltage-limiter mode
operation is configured to 17.7V by resistors R7 and
R8. Use the following equation to select new resistor
values to modify the overvoltage-limiter mode overvolt-
age threshold:
where R8 is typically 10kΩ and OUT_PROTECT is the
new overvoltage threshold. Exercise caution when
operating the overvoltage protector in overvoltage-
limiter mode. Refer to the Overvoltage-Limiter Mode
section in the MAX15008/MAX15010 IC data sheet for
details.
R
R
7
9
=
=
R
R
10
8
×
×
⎛
⎜
⎝
⎛
⎜
⎝
OUT PROTECT
OUT PROTECT
Overvoltage Protector
1 235
_
1 235
.
_
.
V
V
−
−
1
⎞
⎟
⎠
1
⎞
⎟
⎠