TPS24720
www.ti.com
SLVSAL1B –MARCH 2011–REVISED MAY 2011
2.5-V to 18-V High-Efficiency Adjustable Power-Limiting Hot-Swap Controller With Current
Monitor and Overvoltage Protection
Check for Samples: TPS24720
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FEATURES
APPLICATIONS
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2.5-V to 18-V Operation
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Server Backplanes
Accurate Current Limiting for Startup
Programmable FET SOA Protection
Adjustable Current Sense Threshold
Programmable Fault Timer
Storage Area Networks (SAN)
Telecommunications Mezzanine Cards
Medical Systems
Plug-In Modules
Base Stations
Power-Good Output
Fast Breaker for Short-Circuit Protection
Analog Load-Current Monitor Output
Programmable UV and OV
Low-current Standby Mode
FET Fault Detection Flag
3-mm × 3-mm, 16-Pin QFN package
DESCRIPTION
The TPS24720 is an easy-to-use, full-featured protection device for 2.5-V to 18-V power rails. This hot-swap
controller drives an external N-channel MOSFET, while protecting source, load and external MOSFET against
multiple potentially damaging events. During startup, load current and MOSFET power dissipation are limited to
user-selected values. After startup, currents above the user-selected limit will be allowed to flow until
programmed timeout – except in extreme overload events when load is immediately disconnected from source.
Programmable power limiting ensures the external MOSFET operates inside its safe operating area (SOA) at all
times. This allows use of smaller FETs while improving system reliability. Power good, Fault, FET Fault, and
current monitor outputs are provided for system status monitoring and downstream load control.
TYPICAL APPLICATION (12 V at 10 A)
PINOUT
RSENSE
M1
RGT Package
(Top View)
VOUT
COUT
2 mΩ
CSD16403Q5
VIN
C1
0.1 μF
470 μF
3 V
RSET
RGATE
10 Ω
R7
51.1 Ω
R1
R4
R5
R6
90.9 kΩ
SET
VCC
SENSE
GATE OUT
FLTb
1
2
3
4
12
11
10
9
3.01 kΩ
3.01 kΩ
3.01 kΩ
EN
PROG
TIMER
GND
VCC
SENSE
GATE
FFLTb
Thermal
Pad
EN
PGb
R2
TPS24720
FFLTb
2.94 kΩ
OV
ENSD
IMON
PROG
LATCH GND TIMER
VUVLO = 10.83 V
VOV = 14.02 V
ILMT = 12 A
R3
RPROG
53.6 kΩ
CT
56 nF
RIMON
10 kΩ
1.43 kΩ
tFAULT = 7.56 ms
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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 © 2011, Texas Instruments Incorporated