TPS2420RSAT Datasheet, PDF (1/29 Pages) Texas Instruments – 3-V to 20-V INTEGRATED FET HOT SWAP CONTROLLER

TPS2420
www.ti.com
SLUS903D – JANUARY 2009 – REVISED SEPTEMBER 2011
3-V to 20-V INTEGRATED FET HOT SWAP CONTROLLER
Check for Samples: TPS2420
FEATURES
1
•2 Integrated 30-mΩ Pass MOSFET
• 3.0-V to 20-V Bus Operation
• Programmable Fault Current
• Programmable Hard Current Limit
• Programmable Fault Timer
• Internal MOSFET Power Limiting Foldback
• Latching and Auto-Retry Operation
• Analog Current Monitor Output
• Powergood Output
• Fault Output Indicator
• 4 mm × 4 mm QFN
• –40°C to 125°C Junction Temperature Range
• UL Listed - File Number E169910
APPLICATIONS
• RAID Arrays
• Telecommunications
• Plug-In Circuit Boards
• Disk Drives
DESCRIPTION
The TPS2420 provides highly integrated load
protection for 3-V to 20-V applications. The TPS2420
protects loads, minimizes inrush current, and safely
shuts down in the event of a fault. The programmable
fault current threshold starts the fault timer while
allowing the current to pass to the load uninhibited.
The programmable current limit threshold sets the
maximum current allowed into the load, for both
inrush and severe load faults. Both events use the
programmable timer which inhibits all current to the
load when it expires.
The dual protection thresholds are useful in
applications such as disk drives. The start-up and
seek currents are typically higher than the nominal
current and during this time the load needs a low
impedance path to deliver the power. If a failure at
the load occurs, the current limit does not allow the
current to exceed the programmed threshold. This
protects both the load and the integrity of the power
supply. The internal MOSFET is protected by power
limit circuitry which ensures that the MOSFET
remains within its safe operating area (SOA) during
all operating states.
The TPS2420 also allows the system to monitor load
currents with no need for a shunt in the power path.
The gain of the current monitor can be scaled to the
application. Fault and power good outputs are
provided for improved system management and
sequencing control.
This device can be programmed to either latch-off or
retry in the event of a fault. All of this functionality is
packed into a 16-pin 4 × 4 mm QFN package.
3.0 V to 20.0 V
1 VIN
VOUT 12
2 VIN
3 VIN
(A)
C_VIN
(A)
15-V
SMAJ15A
4 VIN
TPS2420
16 EN
LTCH GND IMAX
6
5
7
IFLT
8
VOUT 11
VOUT 10
FLT ¹⁵
PG ¹⁴
IMON 13
CT
9
40.2 kW 49.9 kW 0.1 mF
VOUT
} Optional:
to system
monitor
(A)
C_LOAD
63.4 kW
(A) Required only in systems with lead and/or load inductance.
UDG-09017
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 © 2009–2011, Texas Instruments Incorporated