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TPS2553-1

更新时间： 2024-11-20 07:04:47
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26页 1608K
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PRECISION ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

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TPS2553-1 数据手册

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TPS2552  
TPS2553, TPS2552-1, TPS2553-1  
www.ti.com........................................................................................................................................ SLVS841A–NOVEMBER 2008–REVISED DECEMBER 2008  
PRECISION ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES  
1
FEATURES  
DESCRIPTION  
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)  
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  
Constant-Current (TPS2552/53) and Latch-off  
(TPS2552-1/53-1) Versions  
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.  
•
•
•
•
•
•
•
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  
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.  
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  
TPS2552/53  
TIPS2552/TPS2553  
DRV PACKAGE  
(TOP VIEW)  
TIPS2552/TPS2553  
DBV PACKAGE  
(TOP VIEW)  
5V USB  
USB Data  
0.1 mF  
USB  
Port  
Input  
RFAULT  
100 kW  
IN  
OUT  
6
6
1
2
3
1
2
3
OUT  
ILIM  
IN IN  
GND GND  
EN  
OUT  
ILIM  
FAULT  
PAD  
120 mF  
5
4
5
4
ILIM  
EN  
FAULT  
RILIM  
Fault Signal  
Control Signal  
FAULT  
EN  
USB requirement only*  
20 kW  
GND  
EN = Active Low for the TPS2552  
EN = Active High for the TPS2553  
Add -1 to part number for lach-off version  
*USB requirement that downstream  
facing ports are bypassed with at least  
120 mF per hub  
Power Pad  
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.  
2
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  
1234567...26

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TPS2553-1 替代型号

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