TPS2552 Datasheet, PDF (1/26 Pages) Texas Instruments – PRECISION ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

TPS2552
TPS2553, TPS2552-1, TPS2553-1
www.ti.com........................................................................................................................................ SLVS841A – NOVEMBER 2008 – REVISED DECEMBER 2008
PRECISION ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
FEATURES
1
•2 ±6% Current-Limit Accuracy at 1.3 A
• Meets USB Current-Limiting Requirements
• Backwards Compatible with TPS2550/51
• Adjustable Current Limit, 75 mA–1300 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
• 1-µA Maximum Standby Supply Current
• Built-in Soft-Start
• 15 kV ESD Protection per IEC 61000-4-2 (with
External Capacitance)
APPLICATIONS
• USB Ports/Hubs
• Digital TV
• Set-Top Boxes
• Mobile Phones
• VOIP Phones
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. These devices offer a
programmable current-limit threshold between 75 mA
and 1.3 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 switching into 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 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 overcurrent and reverse-voltage
conditions.
TIPS2552/TPS2553
DRV PACKAGE
(TOP VIEW)
TIPS2552/TPS2553
DBV PACKAGE
(TOP VIEW)
OUT 1
6 IN
IN 1
ILIM 2 ^PAD 5 GND GND
2
FAULT ³
4 EN
EN 3
6
OUT
5
ILIM
4 FAULT
EN = Active Low for the TPS2552
EN = Active High for the TPS2553
Add -1 to part number for lach-off version
5V USB
Input
R_FAULT
100 kW
Fault Signal
Control Signal
TPS2552/53
0.1 mF
IN
OUT
FAULT ^ILIM
EN
GND
Power Pad
USB Data
USB
Port
120 mF
R_ILIM
20 kW ^{USB requirement only*}
*USB requirement that downstream
facing ports are bypassed with at least
120 mF per hub
Figure 1. Typical Application as USB Power Switch
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.
PowerPAD is a trademark of Texas Instruments.
2
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