TPS2550
TPS2551
www.ti.com
SLVS736–FEBRUARY 2008
ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
1
FEATURES
DESCRIPTION
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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
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.
Deglitched Fault Report
1-µA Maximum Standby Supply Current
Ambient Temperature Range: –40°C to 85°C
Built-in Soft-Start
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.
15 kV ESD Protection (with external
capacitance)
APPLICATIONS
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USB Ports/Hubs
Cell phones
Laptops
Heavy Capacitive Loads
Reverse-Voltage Protection
TPS2550/51
USB Data
0.1 mF
5 V USB
INPUT
USB
Port
IN
OUT
TPS2550/TPS2551
DRV PACKAGE
(TOP VIEW)
TPS2550/TPS2551
DBV PACKAGE
(TOP VIEW)
RFAULT
100 kW
120 mF *
1
2
3
6
5
4
IN
OUT
ILIM
IN
OUT
1
2
3
6
5
4
ILIM
GND
EN
GND
EN
FAULT
EN
ILIM
FAULT Signal
FAULT
FAULT
RILIM
15 kW
EN = Active Low for the TPS2550
EN = Active High for the TPS2551
Control Signal
GND
Power Pad
* USB Requirement that downstream-facing ports
are bypassed with at least 120 mF per hub
Figure 1. Typical Application as USB Power Switch
GENERAL SWITCH CATALOG
33 mW, Single
80 mW, Single
80 mW, Triple
80 mW, Dual
80 mW, Dual
80 mW, Quad
80 mW, Quad
TPS201xA 0.2 A to 2 A
0.2 A to 2 A
0.2 A to 2 A
TPS2014
TPS2015
TPS2041B 500 mA
TPS2051B 500 mA
TPS2045A 250 mA
TPS2049 100 mA
TPS2055A 250 mA
TPS2061
TPS2065
TPS2068
TPS2069
600 mA
1 A
TPS202x
TPS203x
TPS2042B 500 mA
TPS2052B 500 mA
TPS2046B 250 mA
TPS2080 500 mA
TPS2081 500 mA
TPS2082 500 mA
TPS2090 250 mA
TPS2091 250 mA
TPS2092 250 mA
TPS2043B 500 mA
TPS2053B 500 mA
TPS2047B 250 mA
TPS2057A 250 mA
TPS2056
TPS2062
TPS2066
TPS2060
TPS2064
250 mA
1 A
1 A
1.5 A
1.5 A
TPS2044B 500 mA
TPS2054B 500 mA
TPS2048A 250 mA
TPS2085 500 mA
TPS2086 500 mA
TPS2087 500 mA
TPS2095 250 mA
TPS2096 250 mA
TPS2097 250 mA
1 A
1 A
1.5 A
1.5 A
TPS2063
TPS2067
1 A
1 A
TPS2058
250 mA
1
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Texas 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 © 2008, Texas Instruments Incorporated