MAX14654EVKIT# Maxim Integrated, MAX14654EVKIT# Datasheet - Page 8

• Manufacturer Part Number: MAX14654EVKIT#
• Description: Power Management IC Development Tools MAX14654 Eval Kit
• Manufacturer: Maxim Integrated
• Type: Voltage Protectionr

Specifications of MAX14654EVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX14654
• Input Voltage: 2.5 V to 28 V
• Output Voltage: 6.8 V

MAX14653/MAX14654/
MAX14655
Functional Diagram
Detailed Description
The MAX14653/MAX14654/MAX14655 overvoltage pro-
tection devices feature a low on-resistance (R
FET and protect low-voltage systems against voltage
faults up to +28V
the devices from surges up to +80V. If the input voltage
exceeds the overvoltage threshold, the internal FET is
turned off to prevent damage to the protected compo-
nents. The 15ms debounce time built into the device
prevents false turn on of the internal FET during startup.
Device Operation
The devices contain timing logic that controls the turn-on
of the internal FET. The internal charge pump is enabled
when V
or when V
used. The charge-pump startup, which occurs after a
15ms debounce delay, turns the internal FET on (see the
Functional Diagram). After the debounce time, soft-start
limits the FET inrush current for 30ms (typ). At any time,
if V
from IN.
www.maximintegrated.com
IN
rises above V
IN
< V
IN
< V
IN_OVLO
OVLO_TH
OVLO
DC
OVLO_THRESH
IN
IN
IN
. An internal clamp also protects
if internal trip thresholds are used
if external trip thresholds are
SEL
, OUT is disconnected
REFERENCE
GND
V
ON
BG
) internal
MAX14653
MAX14654
MAX14655
TEMPERATURE
FAULTS
Internal Switch
The MAX14653/MAX14654/MAX14655 incorporate an
internal FET with a 38mΩ (typ) R
driven by a charge pump that generates a necessary gate
voltage above IN.
Overvoltage Lockout (OVLO)
The MAX14653 has a 15.5V (typ) overvoltage threshold
(OVLO). The MAX14654 and MAX14655 have 6.8V and
5.825V (typ) OVLO thresholds, respectively.
Thermal-Shutdown Protection
The MAX14653/MAX14654/MAX14655 feature thermal
shutdown circuitry. The internal FET turns off when the
junction temperature exceeds +130ºC (typ). The device
exits thermal shutdown after the junction temperature
cools by 20ºC (typ).
ACOK Output
An open-drain ACOK output gives the MAX14653/
MAX14654 /MAX14655 the ability to communicate a sta-
ble power source to the host system. ACOK is driven low
after input voltage is stable between minimum V
V
ACOK to the logic I/O voltage of the host system. ACOK
is high impedance after thermal shutdown.
OVLO
High-Current Overvoltage Protectors
after debounce. Connect a pullup resistor from
CONTROL
CHARGE
LOGIC
PUMP
with Adjustable OVLO
OUT
OUT
OUT
ACOK
ON
. The FET is internally
Maxim Integrated │ 8
IN
and