MAX5924DEUB+T Maxim Integrated Products, MAX5924DEUB+T Datasheet - Page 15

• Manufacturer Part Number: MAX5924DEUB+T
• Description: IC HOT-SWAP CTRLR N-CH 10-UMAX
• Manufacturer: Maxim Integrated Products
• Type: Hot-Swap Controllerr

Specifications of MAX5924DEUB+T

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: 1 V ~ 13.2 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The enable comparators control the on/off function of
the MAX5924/MAX5925/MAX5926. Enable is also used
to reset the fault latch in latch mode. Pull EN or EN1 low
for 100µs to reset the latch. A resistive divider between
EN or EN1, V
on voltage to a voltage greater than V
The MAX5924/MAX5925/MAX5926 offer a circuit-break-
er function to protect the external MOSFET and the load
Figure 10. Adjustable Turn-On Voltage
Figure 11. Maximum Circuit-Breaker Programming Resistor vs. Temperature
V
Selecting a Circuit-Breaker Threshold
S
1V to 13.2V, n-Channel Hot-Swap Controllers
R
R
2
1
( ) ARE FOR MAX5926 ONLY.
15,000
12,000
9000
6000
3000
S
, and GND sets the programmable turn-
0
-40
EN (EN1)
(EN2)
R
CB
TC = 0ppm/°C
V
V
V
V
V
V
______________________________________________________________________________________
S
S
S
S
S
S
CB
= 1.5V
= 1.4V
= 1.3V
= 1.2V
= 1.1V
= 1.0V
-15
EN (MAX5924/MAX5925),
MAX5924_
MAX5925_
MAX5926
TEMPERATURE (°C)
GND
V
CC
10
EN1/ EN2 (MAX5926)
GATE
V
35
S,TURN-ON
SC_DET
SENSE
OUT
UVLO
60
=
(R
2
+ R
(Figure 10).
1
85
) V
R
2
EN/UVLO
R
SC
Require No Sense Resistor
from the potentially damaging effects of excessive cur-
rent. As load current flows through R
or R
After V
MAX5926 monitor this voltage to detect overcurrent
conditions. If this voltage exceeds the circuit-breaker
threshold, the external MOSFET turns off and the
power-good output(s) deassert(s). To accommodate
different MOSFETs, sense resistors, and load currents,
the MAX5924/MAX5925/MAX5926 voltage across R
can be set between 10mV and 500mV. The value of the
circuit-breaker voltage must be carefully selected
based on V
When operating without R
breaker threshold using the MOSFET’s R
worst possible operating condition, and add a 20% over-
current margin to the maximum circuit current. For exam-
ple, if a MOSFET has an R
+25°C, and a normalized on-resistance factor of 1.75 at
T
product of these two numbers, or (0.06Ω) x (1.75) =
0.105Ω. Then, if the maximum current is expected to be
2A, using a 20% margin, the current for calculation is
(2A) x (1.2) = 2.4A. The resulting minimum circuit-break-
er threshold is then a product of these two numbers, or
(0.105Ω) x (2.4A) = 0.252V. Using this method to choose
a circuit-breaker threshold allows the circuit to operate
under worst-case conditions without causing a circuit-
breaker fault, but the circuit-breaker function will still
detect a short circuit or a gross overcurrent condition.
A
= +105°C, the R
SENSE
GS
exceeds V
15,000
12,000
S
(Figure 13), a voltage drop is generated.
9000
6000
3000
(Figure 11).
0
-40
TC = 3300ppm/°C
V
V
V
V
V
V
S
S
S
S
S
S
= 1.5V
= 1.4V
= 1.3V
= 1.2V
= 1.1V
= 1.0V
DS(ON)
-15
CB,EN
TEMPERATURE (°C)
SENSE
10
, the MAX5924/MAX5925/
used for calculation is the
DS(ON)
, calculate the circuit-
35
DS(ON)
No R
of 0.06Ω at T
60
DS(ON)
SENSE
(Figure 12)
85
Mode
at the
A
CB
15
=