MAX34565EVKIT# Maxim Integrated, MAX34565EVKIT# Datasheet - Page 6

• Manufacturer Part Number: MAX34565EVKIT#
• Description: Power Management IC Development Tools MAX34565 Eval Kit
• Manufacturer: Maxim Integrated
• Type: Power Driversr
• Series: MAX34565r

Specifications of MAX34565EVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX34565
• Input Voltage: 12 V
• Output Voltage: 1.95 V
• Output Current: 3.6 A
• Part # Aliases: 90-34565#K00

The MAX34565 is a self-contained hot-plug switch
intended to be used on +12V power buses to limit
through current and to control the power-up output-
voltage ramp. The device begins to operate when V
exceeds the undervoltage lockout level, V
level, the enable circuit and EN/FAULT pin become
active. Once the device has been enabled by exceed-
ing V
to the power MOSFET, allowing current to begin flowing
from the V
The device contains an on-board 68mI n-channel power
MOSFET that is actively closed-loop controlled to ensure
that an adjustable current limit is not exceeded. The
maximum allowable current through the device is deter-
mined by an external resistor connected to the ILIM pin.
The device also contains the ability to control the power-
up output-voltage ramp. A capacitor connected to the
VRAMP pin sets the desired voltage ramp rate. The
output voltage is unconditionally clamped to keep input
overvoltage stresses from harming the load. The device
has an on-board temperature sensor with hysteresis.
If operating conditions cause the device to exceed an
internal thermal limit, the device unconditionally shuts
down and latches off while waiting for a power-on reset.
In the event of thermal shutdown, the device drives the
EN/FAULT pin to an intermediate voltage, V
When voltage is applied to V
rising limit, V
circuit is enabled. When the voltage on V
V
that to allow current to pass through to the LOAD pins,
V
must exceed V
The EN/FAULT pin can be used to control the output
of the device and to indicate that a thermal fault has
occurred. The voltage level of the EN/FAULT pin is
compared to two internal sources: voltage on limit
(V
V
the voltage ramp circuit turns on, enabling the device’s
output. When the voltage on EN/FAULT is below V
UF
CC
UR
OHT
, the current through the MOSFET is blocked. Note
and the voltage level on EN/FAULT exceeds V
OLT
must exceed V
) and voltage off limit (V
on the EN/FAULT pin, a gate voltage is applied
CC
UR
Enable/Fault Function (EN/FAULT)
pad to LOAD.
OHT
, must be exceeded before the MOSFET
.
UR
Detailed Description
and the voltage on EN/FAULT
CC
Undervoltage Lockout
12V Hot-Plug Switch in TDFN Package
OLT
, the undervoltage lockout
). When V
CC
FAULT
drops below
CC
UR
. At this
is above
.
OHT
OLT
CC
,
,
the device’s output is disabled. If the internal tem-
perature of the device exceeds T
occurs and the device drives EN/FAULT to V
See
An open-drain device should be connected to the EN/
FAULT pin for proper operation. Because the device
pulls EN/FAULT to V
event of thermal shutdown, this pin should not be con-
nected to an external pullup device. See
typical application circuit.
Figure 2. Typical Application Circuit
Figure 1. EN/FAULT Signal Levels
Figure 1
ENABLE
V
FAULT
V
V
OHT
OLT
12V
for the EN/FAULT signal levels.
ENABLED
LOAD
FAULT
V
EN/FAULT
CC
(a three-state condition) in the
MAX34565
GND
DISABLED
LOAD
MAX34565
SHDN
VRAMP
LOAD
ILIM
, a thermal fault
SHUTDOWN/
Figure 2
THERMAL
FAULT
R
ILIM
FAULT
for a
6
.