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TPS2556QDRB PDF预览

TPS2556QDRB

更新时间: 2024-11-20 13:14:51
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德州仪器 - TI 开关
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TPS2556QDRB 数据手册

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TPS2556  
TPS2557  
www.ti.com  
SLVS931A NOVEMBER 2009REVISED FEBRUARY 2012  
PRECISION ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES  
Check for Samples: TPS2556, TPS2557  
1
FEATURES  
APPLICATIONS  
2
Meets USB Current-Limiting Requirements  
Adjustable Current Limit, 500 mA5 A (typ)  
+/- 6.5% Current-Limit Accuracy at 4.5 A  
Fast Overcurrent Response - 3.5-μS (typ)  
22-mHigh-Side MOSFET  
USB Ports/Hubs  
Digital TV  
Set-Top Boxes  
VOIP Phones  
DESCRIPTION  
Operating Range: 2.5 V to 6.5 V  
2-μA Maximum Standby Supply Current  
Built-in Soft-Start  
The TPS2556/57 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 500  
mA and 5.0 A (typ) via an external resistor. The  
power-switch rise and fall times are controlled to  
minimize current surges during turn on/off.  
15 kV / 8 kV System-Level ESD Capable  
UL Listed* File No. E169910  
CB & Nemko Certification*  
*RILIM 24.9 k(5A maximum)  
TPS2556/57 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.  
The FAULT logic output asserts low during  
overcurrent and over temperature conditions.  
TPS2556/57  
DRB PACKAGE  
(TOP VIEW)  
TPS2556/57  
0.1 uF  
2.5V 6.5V  
VOUT  
IN  
IN  
OUT  
OUT  
RFAULT  
100 kΩ  
1
2
3
4
GND  
IN  
IN  
8
7
6
5
FAULT  
OUT  
OUT  
PAD  
RILIM  
CLOAD  
ILIM  
Fault Signal  
Control Signal  
FAULT  
EN  
EN  
ILIM  
GND  
EN = Active Low for the TPS2556  
EN = Active High for the TPS2557  
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 © 20092012, Texas Instruments Incorporated  

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