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TPS2551-Q1 Datasheet, PDF (1/26 Pages) Texas Instruments – ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCH
TPS2551-Q1
www.ti.com ...................................................................................................................................................................................................... SLVS850 – JUNE 2008
ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCH
FEATURES
1
• Qualified for Automotive Applications
• Adjustable Current-Limit: 100 mA to 1100 mA
• Fast Overcurrent Response: 2 µs (Typ)
• 85-mΩ High-Side MOSFET
• 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)
APPLICATIONS
• USB Ports/Hubs
• Cell Phones
• Laptops
• Heavy Capacitive Loads
• Reverse-Voltage Protection
DESCRIPTION
The TPS2551 power-distribution switch is intended
for applications in which 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.
DBV PACKAGE
(TOP VIEW)
5-V USB Input
RFAULT
100 kW
0.1 µF
IN
OUT
USB Data
120 µF *
USB
Port
IN 1 6 OUT
GND 2 5 ILIM
EN 3 4 FAULT
FAULT Signal
Control Signal
FAULT
ILIM
EN
GND
GND
RILIM
15 kW
* USB requirement that downstream-facing ports are bypassed with at least 120 µF per hub
Figure 1. Typical Application as USB Power Switch
33 mW, Single
80 mW, Single
GENERAL SWITCH CATALOG
80 mW, Dual
80 mW, Dual
80 mW, Triple
80 mW, Quad
80 mW, Quad
TPS201xA 0.2 A to 2 A
TPS202x 0.2 A to 2 A
TPS203x 0.2 A to 2 A
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
TPS2042B
TPS2052B
TPS2046B
TPS2056
TPS2062
TPS2066
TPS2060
TPS2064
500 mA
500 mA
250 mA
250 mA
1A
1A
1.5 A
1.5 A
TPS2080
TPS2081
TPS2082
TPS2090
TPS2091
TPS2092
500 mA
500 mA
500 mA
250 mA
250 mA
250 mA
TPS2043B
TPS2053B
TPS2047B
TPS2057A
TPS2063
TPS2067
500 mA
500 mA
250 mA
250 mA
1A
1A
TPS2044B
TPS2054B
TPS2048A
TPS2058
500 mA
500 mA
250 mA
250 mA
TPS2085
TPS2086
TPS2087
TPS2095
TPS2096
TPS2097
500 mA
500 mA
500 mA
250 mA
250 mA
250 mA
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.
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
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