TPS2421-1 Datasheet, PDF (1/22 Pages) Texas Instruments – 3-V to 20-V Integrated FET Hot Swap

TPS2421-1
TPS2421-2
www.ti.com .................................................................................................................................................. SLUS907A – JANUARY 2009 – REVISED MARCH 2009
3-V to 20-V Integrated FET Hot Swap
FEATURES
1
•2 Integrated Pass MOSFET
• 3.3-V 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 (-1) and Retry (-2) Versions
• SO-8 PowerPad™ Package
• –40°C to 125°C Junction Temperature Range
APPLICATIONS
• RAID Arrays
• Telecommunications
• Plug-In Circuit Boards
• Disk Drive
3 V to 20 V IN
3 VIN
DESCRIPTION
The TPS2421 provides highly integrated hot swap
power management and superior protection in
applications where the load is powered by voltages
between 3.0 V and 20 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 is an easy to use
devices in an 8-pin PowerPad™ SO-8 package.
The TPS2421 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 is available in latch-off on fault (-1) and
retry on fault (-2).
VOUT 7
OUT
2 EN
FLT ¹
(A)
GND ISET CT PG
C_VIN
4
5
6
8
(A)
(A)
C_OUT
Figure 1. Typical Application
NOTE:
(A) Required only in systems with lead and/or load inductance.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPad is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated