MAX5902AAETT+T Maxim Integrated Products, MAX5902AAETT+T Datasheet - Page 7

• Manufacturer Part Number: MAX5902AAETT+T
• Description: IC HOT-SWAP CONTROLLER 6-TDFN
• Manufacturer: Maxim Integrated Products
• Series: Simple Swapper™r
• Type: Hot-Swap Controllerr

Specifications of MAX5902AAETT+T

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: 9 V ~ 72 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-WDFN exposed pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

A thermal shutdown feature protects the external MOS-
FET by turning it off if the die temperature of the
MAX5902/MAX5903 exceeds +125°C. The MAX5902/
MAX5903 must be in good thermal contact with the
external MOSFET. See Layout Guidelines in the Appli-
cations section of the data sheet.
A circuit-breaker function monitors the voltage across
the external MOSFET, V
V
circuit-breaker function is enabled after the MOSFET is
fully enhanced. Three threshold voltage options are
available—300mV, 400mV, and 500mV. One version is
available with no circuit-breaker function. Fault man-
agement for the MAX5902/MAX5903 is offered with two
different configurations; latched and automatic retry.
After a circuit-breaker trip event, the latched
versions (MAX5902L/MAX5903L) drive GATE to
V
(PGOOD) is deasserted. A latched off condition
needs to be reset by toggling ON/OFF low for at
least 10ms, or by cycling the power supply, V
After a circuit-breaker trip event, the automatic retry
versions (MAX5902A/MAX5903A) drive GATE to V
turning off the external MOSFET, and PGOOD
(PGOOD) is deasserted. If the start conditions are met
for a full 150ms (t
The start conditions are: the device is not in UVLO;
ON/OFF is not driven low; and the device is not in ther-
mal shutdown.
Figure 3. Programmed +18V Lockout, with Optional Optocoupler
On/Off Control.
SD
S
, turning off the external MOSFET, and PGOOD
+72V, SOT23/TDFN, Simple Swapper Hot-Swap
OPTIONAL
exceeds the circuit-breaker threshold, V
ON/OFF
DGND
+24V
GND
Automatic Retry Circuit Breaker
RS
_______________________________________________________________________________________
) the start sequence is re-initiated.
SD
Latched Circuit Breaker
, and turns off the MOSFET if
R2
40.2kΩ
R1
3.01kΩ
HOT-SWAP CONTROLLER
V
ON/OFF
GND
S
MAX5902
MAX5903
S
.
CB
. The
S
,
For the versions without a circuit breaker, MAX5902N
(MAX5903N), PGOOD (PGOOD) are asserted when the
MOSFET is fully enhanced. Once powered up the
MAX5902N/MAX5903N ignore the MOSFET drain-to-
source voltage for applications where a circuit-breaker
function is not desired.
The ON/OFF control input provides three functions:
external ON/OFF control; setting of the UVLO level; and
resetting after a circuit-breaker event has caused the
MAX5902L/MAX5903L to turn off the external MOSFET.
Pulling ON/OFF to GND for at least 10ms (t
the MAX5902/MAX5903 to turn off the external MOSFET
(see Figure 3 for a circuit example). To reset the
MAX5902L/MAX5903L after a circuit-breaker event,
toggle ON/OFF to GND for at least 10ms (t
ON/OFF can be used to sequence power supplies.
Connecting a capacitor from ON/OFF to GND will delay
the rise of ON/OFF proportional to the capacitance and
input impedance of ON/OFF, typically 33kΩ (Figure 4).
The MAX5902/MAX5903 can be controlled by logic-
level signals. Logic-level signals of 3.3V or 1.8V may be
directly connected to ON/OFF. For 5V logic level control,
insert a series 47kΩ resistor as shown in Figure 5.
Figure 4. Power-Supply Sequencing
GND
V
S
Applications Information
C
2C
ON/
HOT-SWAP CONTROLLER #1
HOT-SWAP CONTROLLER #2
Controllers
No Circuit Breaker
V
ON/OFF
GND
V
ON/OFF
GND
S
S
OFF Control Input
MAX5902
MAX5903
MAX5902
MAX5903
OFF
OFF
).
) forces
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