TPS2550
TPS2551
www.ti.com ........................................................................................................................................ SLVS736B – FEBRUARY 2008 – REVISED NOVEMBER 2008
ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
FEATURES
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DESCRIPTION
Adjustable Current-Limit, 100 mA–1100 mA
Fast Overcurrent Response - 2 µS Typical
85-mΩ High-Side MOSFET (DBV Package)
Reverse Input-Output Voltage Protection
Operating Range: 2.5 V to 6.5 V
Deglitched Fault Report
1-µA Maximum Standby Supply Current
Junction Temperature Range: –40°C to 125°C
Built-in Soft-Start
15 kV ESD Protection (with external
capacitance)
UL Listed – File No. E169910
Current-Limit Resistor Calculator – SLVC163
The TPS2550/51 power-distribution switch is
intended for applications where heavy capacitive
loads and short-circuits are likely to be encountered,
incorporating a 100-mΩ, N-channel MOSFET in a
single package. The current-limit threshold is user
adjustable between 100 mA and 1.1 A via an external
resistor. The power-switch rise and fall times are
controlled to minimize current surges during
switching.
The device limits the output current to a desired level
by switching into a constant-current mode when the
output load exceeds the current-limit threshold or a
short is present. An internal reverse-voltage detection
comparator disables the power-switch in the event
that the output voltage is driven higher than the input
to protect devices on the input side of the switch. The
FAULT logic output asserts low during both
overcurrent and reverse-voltage conditions.
APPLICATIONS
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USB Ports/Hubs
Cell phones
Laptops
Heavy Capacitive Loads
Reverse-Voltage Protection
OUT
1
ILIM
2
3
FAULT
PAD
TPS2550/TPS2551
DRV PACKAGE
(TOP VIEW)
6
IN
5
4
GND
EN
0.1 mF
INPUT
1
6
2
3
5
4
120 mF *
FAULT Signal
FAULT
ILIM
Control Signal
OUT
ILIM
FAULT
USB
Port
OUT
IN
RFAULT
100 kW
TPS2550/TPS2551
DBV PACKAGE
(TOP VIEW)
IN
GND
EN
USB Data
TPS2550/51
5 V USB
EN
GND
RILIM
15 kW
PowerPAD
* USB Requirement that downstream-facing ports
are bypassed with at least 120 mF per hub
EN = Active Low for the TPS2550
EN = Active High for the TPS2551
Figure 1. Typical Application as USB Power
Switch
GENERAL SWITCH CATALOG
33 mW, Single
TPS201xA
TPS202x
TPS203x
0.2 A to 2 A
0.2 A to 2 A
0.2 A to 2 A
80 mW, Single
TPS2014
TPS2015
TPS2041B
TPS2051B
TPS2045A
TPS2049
TPS2055A
TPS2061
TPS2065
TPS2068
TPS2069
600 mA
1A
500 mA
500 mA
250 mA
100 mA
250 mA
1A
1A
1.5 A
1.5 A
80 mW, Dual
TPS2042B
TPS2052B
TPS2046B
TPS2056
TPS2062
TPS2066
TPS2060
TPS2064
500 mA
500 mA
250 mA
250 mA
1A
1A
1.5 A
1.5 A
80 mW, Dual
TPS2080
TPS2081
TPS2082
TPS2090
TPS2091
TPS2092
500 mA
500 mA
500 mA
250 mA
250 mA
250 mA
80 mW, Triple
TPS2043B
TPS2053B
TPS2047B
TPS2057A
TPS2063
TPS2067
500 mA
500 mA
250 mA
250 mA
1A
1A
80 mW, Quad
TPS2044B
TPS2054B
TPS2048A
TPS2058
500 mA
500 mA
250 mA
250 mA
80 mW, Quad
TPS2085
TPS2086
TPS2087
TPS2095
TPS2096
TPS2097
500 mA
500 mA
500 mA
250 mA
250 mA
250 mA
1
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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.
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 © 2008, Texas Instruments Incorporated
