LTC4261CUFD#PBF Linear Technology, LTC4261CUFD#PBF Datasheet - Page 15
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LTC4261CUFD#PBF
Manufacturer Part Number
LTC4261CUFD#PBF
Description
IC CTRLR HOTSWAP W/ADC 24-QFN
Manufacturer
Linear Technology
Type
Hot-Swap Controllerr
Datasheet
1.LTC4261IGNPBF.pdf
(32 pages)
Specifications of LTC4261CUFD#PBF
Applications
General Purpose
Internal Switch(s)
No
Voltage - Supply
9 V ~ 11.2 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
24-WFQFN Exposed Pad
Family Name
LTC4261
Package Type
QFN EP
Operating Supply Voltage (min)
-12V
Operating Supply Voltage (max)
-100V
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Product Depth (mm)
4mm
Product Length (mm)
5mm
Mounting
Surface Mount
Pin Count
24
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
APPLICATIONS INFORMATION
6. The voltage at INTV
7. V
8. The PGI pin is high when the PGI check timer expires
For conditions 1, 2, 5, 6, after the condition is cleared,
the LTC4261/LTC4261-2 will automatically enter the FET
turn-on sequence as previously described.
For any of the fault conditions 3, 4, 7, 8, the FET off
mode is programmable by the corresponding auto-retry
bit in the CONTROL register. If the auto-retry bit is set
undervoltage lockout).
530µs (overcurrent fault).
(power bad fault).
SENSE
INTERNAL
RTN_V
PWRGD
SENSE
GATE
V
PGIO
TMR
OUT
PGI
PG
SS
EE
> 50mV and the condition lasts longer than
START-UP DELAY
UVH
1x
CC
is lower than 4.25V (INTV
Figure 3. LTC4261 Turn-On Sequence
INRUSH
CC
1.77V
50mV
to 0, the FET is latched off upon the fault condition. If
the auto-retry bit is set to 1, after the fault condition is
cleared, a delay timer is started. After the timer expires,
the FET enters the auto-retry mode and GATE is pulled
up. The auto-retry delay following the undervoltage fault
or the power bad fault has a duration of t
retry delay following the overcurrent fault has a duration
of 4t
overvoltage fault does not have a delay. The auto-retry
control bits and their defaults at power up are listed in
Table 6. Note that the LTC4261 defaults to latch-off while
the LTC4261-2 defaults to auto-retry following the over-
current fault.
LATCHED
V
D
Z
for extra cooling time. The auto-retry following the
– 1.2V
2x
PWRGD1
DELAY
PWRGD1
READY
LOAD 1
LTC4261/LTC4261-2
2x
PWRGD2
DELAY
PWRGD2
READY
LOAD 1 + LOAD 2
PGI CHECK
DELAY
NORMAL PGI
4x
POWER BAD
D
. The auto-
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