MAX5931AEEP+ Maxim Integrated Products, MAX5931AEEP+ Datasheet - Page 20

• Manufacturer Part Number: MAX5931AEEP+
• Description: IC HOT-SWAP CTRLR TRPL 20-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Hot-Swap Controllerr

Specifications of MAX5931AEEP+

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: 1 V ~ 15 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP (0.154", 3.91mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

During normal operation, the external MOSFETs dissi-
pate little power. The MOSFET R
MOSFET is fully enhanced. The power dissipated in nor-
mal operation is P
power dissipation occurs during the turn-on and turn-off
transients when the MOSFETs are in their linear regions.
By taking into consideration the worst-case scenario of a
continuous short-circuit fault, consider these two cases:
1) The single turn-on with the device latched after a
Low-Voltage, Triple, Hot-Swap Controllers/
Power Sequencers/Voltage Trackers
Figure 11. Power Sequencing: Channel Z Turns On t
20
fault: MAX5930A/MAX5931A/MAX5931B (LATCH =
high or unconnected).
______________________________________________________________________________________
MOSFET Thermal Considerations
V
EN
OFF
GND
ON
D
V
V
Y
Z
= I
LOAD
2
DS(ON)
x R
t
0
DS(ON)
t
1
is low when the
V
ONZ, TH
V
t
DELAY
ONY, TH
R
. The most
1
C
DELAY
1
t
2
After Channel Y
ON
GND
INY
INZ
2) The continuous autoretry after a fault: MAX5930A/
MOSFET manufacturers typically include the package
thermal resistance from junction to ambient (R
thermal resistance from junction to case (R
determine the startup time and the retry duty cycle (d =
t
sient thermal resistance with the following equation:
where I
R
R
START
SENSEZ
SENSEY
MAX5931A/MAX5931B (LATCH = low).
MAX5930A
MAX5931A
MAX5931B
SENSEY
SENSEZ
/(t
START
START
V
V
V
V
EN
ON
Y
Z
= V
t
Z
DELAY
+ t
t
t
1
2
θ
= -R
= -R
SU,TH
JA MAX
GATEY
GATEZ
= -R
RETRY
Q1
Q2
1
1
(
C
C
1
1
1
C
ln
ln
1
(
(
ln
/ R
V
V
(
)
EN
EN
). Calculate the required tran-
V
V
SENSE
≤
EN
EN
- V
- V
V
V
- V
- V
EN
EN
V
ONY, TH
ONZ, TH
T
IN
ONY, TH
ONZ, TH
JMAX
C
C
BOARDZ
BOARDY
)
)
×
.
)
I
START
OUTZ
−
OUTY
T
A
θJC
θJA
), which
) and