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LTC4231HMS-2#PBF

Description
LTC4231 - Micropower Hot Swap Controller; Package: MSOP; Pins: 12; Temperature Range: -40°C to 125°C
CategoryPower/power management    The power supply circuit   
File Size414KB,22 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC4231HMS-2#PBF Overview

LTC4231 - Micropower Hot Swap Controller; Package: MSOP; Pins: 12; Temperature Range: -40°C to 125°C

LTC4231HMS-2#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
Objectid8133556331
Parts packaging codeMSOP
package instructionMSOP-12
Contacts12
Manufacturer packaging codeMS
Reach Compliance Codecompliant
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
Maximum input voltage36 V
Minimum input voltage2.7 V
Nominal input voltage7 V
JESD-30 codeR-PDSO-G12
JESD-609 codee3
length4.039 mm
Number of functions1
Number of terminals12
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Maximum seat height1.1 mm
surface mountYES
technologyCMOS
Temperature levelAUTOMOTIVE
Terminal surfaceMATTE TIN
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
width3 mm
LTC4231
Micropower Hot Swap
Controller
FeaTures
n
n
n
n
n
n
n
n
n
n
DescripTion
The
LTC
®
4231
is a micropower Hot Swap™ controller that
allows safe circuit board insertion and removal from a live
power supply. An internal high side switch driver controls
the gate of an external N-channel MOSFET. Back-to-back
MOSFETs can be used for reverse supply protection down
to –40V.
The LTC4231 provides a debounce delay and allows the
GATE to be ramped up at an adjustable rate. After start-
up, the LTC4231's quiescent current drops to 4µA during
normal operation with output active. UVL, UVH, OV and
GNDSW monitor overvoltage and undervoltage periodi-
cally, keeping total quiescent current low. Pulling
SHDN
low shuts down the LTC4231 and quiescent current drops
to 0.3µA.
During an overcurrent fault, the LTC4231 actively limits
current while running an adjustable timer. The LTC4231-1
remains off after a current fault while the LTC4231-2
automatically reapplies power after a cool-down period.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
Swap and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
Enables Safe Board Insertion and Removal from a
Power Supply
4µA Supply Current
0.3µA Shutdown Current
Wide Operating Voltage Range: 2.7V to 36V
Reverse Supply Protection to –40V
Adjustable Analog Current Limit with Circuit Breaker
Automatic Retry or Latchoff on Current Fault
Overvoltage and Undervoltage Monitoring
Controls Single or Back-to-Back N-Channel MOSFETs
12-Lead MSOP and 3mm × 3mm QFN Packages
applicaTions
n
n
n
n
n
Battery Powered Equipment
Solar Powered Systems
Portable Instruments
Automotive Battery Protection
Energy Harvesting
Typical applicaTion
Battery Hot Swap with Reverse Protection
SMAJ24CA
22.5m
Si7164DP
Si5410DU
V
OUT
24V
2A
220µF
SENSE
1020k
24V
1.65k
UVH
4.22k
OV
32.4k
GNDSW
GND
TIMER
180nF
SHDN
IN
UVL
LTC4231
GATE
SOURCE
STATUS
SOURCE
20V/DIV
I
LOAD
5A/DIV
10ms/DIV
4231 TA01b
Power-Up Waveforms
CONTACT
BOUNCE
IN
20V/DIV
GATE
20V/DIV
20k
4231 TA01a
4321fa
For more information
www.linear.com/LTC4231
1
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