TPS2421-1_16 Datasheet, PDF (1/31 Pages) Texas Instruments – 5-A, 20-V Integrated FET Hot Swap

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TPS2421-1, TPS2421-2
SLUS907I – JANUARY 2009 – REVISED JANUARY 2015
TPS242x 5-A, 20-V Integrated FET Hot Swap
1 Features
•1 Integrated Pass MOSFET
• Up to 20-V Bus Operation
• Programmable Fault Current
• Current Limit Proportionally Larger than Fault
Current
• Programmable Fault Timer
• Internal MOSFET Power Limiting
• Latch-Off on Fault (TPS2421-1) and Retry
(TPS2421-2) Versions
• SO-8 PowerPad™ Package
• –40°C to 125°C Junction Temperature Range
• UL2367 Recognized - File Number E169910
2 Applications
• RAID Arrays
• Telecommunications
• Plug-In Circuit Boards
• Disk Drives
• SSDs
• PCIE
• Fan Control
3 Description
The TPS2421 device provides highly integrated hot
swap power management and superior protection in
applications where the load is powered by busses up
to 20 V. The TPS2421 device is well suited to
standard bus voltages as low as 3.3 V because of the
maximum-UV turn-on threshold of 2.9 V. These
devices are very effective in systems where a voltage
bus must be protected to prevent shorts from
interrupting or damaging the unit. The TPS2421
device is an easy to use devices in an 8-pin
PowerPad™ SO-8 package.
The TPS2421 device has multiple programmable
protection features. Load protection is accomplished
by a non-current limiting fault threshold, a hard
current limit, and a fault timer. The current dual
thresholds allow the system to draw short high
current pulses, while the fault timer is running, without
causing a voltage droop at the load. An example of
this is a disk drive startup. This technique is ideal for
loads that experience brief high demand, but benefit
from protection levels in-line with their average
current draw.
Hotswap MOSFET protection is provided by power
limit circuitry which protects the internal MOSFET
against SOA related failures.
The TPS2421 device is available in latch-off on fault
(TPS2421-1) and retry on fault (TPS2421-2).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS2421-1
TPS2421-2
HSOP (8)
4.89mm x 3.90mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Typical Application
VIN
3 VIN
VOUT 7
VOUT
2 EN
FLT ¹
GND ISET CT PG
4
5
6
8
C_LOAD
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.