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SLVS841C – NOVEMBER 2008 – REVISED SEPTEMBER 2009
PRECISION ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
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FEATURES
Up to 1.5 A Maximum Load Current
±6% Current-Limit Accuracy at 1.7 A (typ)
Meets USB Current-Limiting Requirements
Backwards Compatible with TPS2550/51
Adjustable Current Limit, 75 mA–1700 mA (typ)
Constant-Current (TPS2552/53) and Latch-off
(TPS2552-1/53-1) Versions
Fast Overcurrent Response - 2-µS (typ)
85-mΩ High-Side MOSFET (DBV Package)
Reverse Input-Output Voltage Protection
Operating Range: 2.5 V to 6.5 V
Built-in Soft-Start
15 kV ESD Protection per IEC 61000-4-2 (with
External Capacitance)
UL Listed – File No. E169910
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DESCRIPTION
The
TPS2552/53
and
TPS2552-1/53-1
power-distribution switches are intended for
applications where precision current limiting is
required or heavy capacitive loads and short circuits
are encountered and provide up to 1.5 A of
continuous load current. These devices offer a
programmable current-limit threshold between 75 mA
and 1.7 A (typ) via an external resistor. Current-limit
accuracy as tight as ±6% can be achieved at the
higher current-limit settings. The power-switch rise
and fall times are controlled to minimize current
surges during turn on/off.
TPS2552/53 devices limit the output current to a safe
level by using a constant-current mode when the
output load exceeds the current-limit threshold.
TPS2552-1/53-1 devices provide circuit breaker
functionality by latching off the power switch during
overcurrent or reverse-voltage situations. An internal
reverse-voltage
comparator
disables
the
power-switch when the output voltage is driven higher
than the input to protect devices on the input side of
the switch. The FAULT output asserts low during
overcurrent and reverse-voltage conditions.
TPS2552/53
5V USB
Input
0.1
m
F
USB Data
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APPLICATIONS
USB Ports/Hubs
Digital TV
Set-Top Boxes
VOIP Phones
TPS2552/TPS2553
DRV PACKAGE
(TOP VIEW)
TPS2552/TPS2553
DBV PACKAGE
(TOP VIEW)
IN
OUT
120
m
F
USB
Port
OUT
ILIM
FAULT
1
2
3
PAD
6 IN
5 GND
4 EN
IN
GND
EN
1
2
3
6
5
4
OUT
ILIM
FAULT
R
FAULT
100 kW
Fault Signal
Control Signal
EN = Active Low for the TPS2552
EN = Active High for the TPS2553
Add -1 to part number for lach-off version
FAULT
EN
ILIM
GND
R
ILIM
20 kW
USB requirement only*
Power Pad
*USB requirement that downstream
facing ports are bypassed with at least
120
m
F per hub
Figure 1. Typical Application as USB Power Switch
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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.
Copyright © 2008–2009, Texas Instruments Incorporated
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.
TI [ TEXAS INSTRUMENTS ]
