MAX5956BEEE+ Maxim Integrated Products, MAX5956BEEE+ Datasheet - Page 10

• Manufacturer Part Number: MAX5956BEEE+
• Description: IC DUAL HOT-SWAP CTRLR 16-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Hot-Swap Controllerr

Specifications of MAX5956BEEE+

• 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: 16-SSOP (0.150", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Select the external MOSFETs according to the applica-
tion’s current levels. Table 2 lists some recommended
components. The MOSFET’s on-resistance (R
should be chosen low enough to have a minimum volt-
age drop at full load to limit the MOSFET power dissi-
pation. High R
pulsating load. Determine the device power rating to
accommodate a short-circuit condition on the board at
startup and when the device is in automatic-retry mode
(see the MOSFET Thermal Considerations section).
Using the MAX5955B/MAX5956B in latched mode allows
the use of MOSFETs with lower power ratings. A MOSFET
typically withstands single-shot pulses with higher dissi-
pation than the specified package rating. Table 3 lists
some recommended manufacturers and components.
Low-Voltage, Dual Hot-Swap Controllers with
Independent On/Off Control
Table 1. Status Output Truth Table
Table 2. Recommended n-Channel
MOSFETs
10
PART NUMBER
IRF7413
IRF7401
IRL3502S
MMSF3300
MMSF5N02H
MTB60N05H
FDS6670A
NDS8426A
FDB8030L
Protection
MAX5955
MAX5956
Monitor
UV/OV
UV/OV
PART
______________________________________________________________________________________
OVERCURRENT
DS(ON)
FAULT (V
Applications Information
MANUFACTURER
Yes
Yes
X
X
X
X
X
X
International
causes output ripple if there is a
Motorola
Fairchild
Rectifier
OUT1
Component Selection
)
OVERCURRENT
FAULT (V
n-Channel MOSFET
11mΩ, 8 SO, 30V
22mΩ, 8 SO, 20V
6mΩ, D2PAK, 20V
20mΩ, 8 SO, 30V
30mΩ, 8 SO, 20V
14mΩ, D
10mΩ, 8 SO, 30V
13.5mΩ, 8 SO, 20V
4.5mΩ, D
Yes
Yes
X
X
X
X
X
X
DESCRIPTION
OUT2
2
)
2
PAK, 50V
PAK, 30V
DS(ON)
VOLTAGE FAULT
OVER/UNDER-
)
(V
OUT1
Yes
Yes
No
X
X
X
X
X
The slow-comparator threshold voltage is adjustable
from 25mV to 100mV. Select a sense resistor that causes
a drop equal to the slow-comparator threshold voltage at
a current level above the maximum normal operating
current. Typically, set the overload current at 1.2 to 1.5
times the full load current. The fast-comparator threshold
is four times the slow-comparator threshold in normal
operating mode. Choose the sense-resistor power rating
to be greater than (I
The slow-comparator threshold voltage is adjustable
from 25mV to 100mV, allowing designers to fine-tune
the current-limit threshold for use with standard-value
sense resistors. Low slow-comparator thresholds allow
for increased efficiency by reducing the power dissi-
pated by the sense resistor. Furthermore, the low 25mV
slow-comparator threshold is beneficial when operating
with supply rails down to 1V because it allows a small
percentage of the overall output voltage to be used for
current sensing. The VariableSpeed/BiLevel fault pro-
tection feature offers inherent system immunity against
load transients and noise. This allows the slow-com-
parator threshold to be set close to the maximum nor-
mal operating level without experiencing nuisance
faults. To adjust the slow-comparator threshold, calcu-
late R
where V
voltage.
)
LIM
TH
as follows:
is the desired slow-comparator threshold
VOLTAGE FAULT
OVER/UNDER-
(V
R
Slow-Comparator Threshold, R
OVERLOAD
OUT2
Yes
Yes
No
LIM
X
X
X
X
X
=
)
V
TH
0 25
.
)
−
2
x V
25
µ
PGOOD1/
A
PGOOD2
Low/High
High/Low
Low/Low
Low/Low
Low/Low
Low/Low
Low/Low
Low/Low
mV
SC,TH
Sense Resistor
.
GATE1/
GATE2
Off/Off
Off/Off
Off/Off
Off/Off
Off/Off
Off/Off
On/On
On/On
LIM