参数资料
型号: TPS2557DRBT
厂商: TEXAS INSTRUMENTS INC
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封装: GREEN, PLASTIC, SON-8
文件页数: 1/22页
文件大小: 942K
代理商: TPS2557DRBT
OUT
IN
GND
FAULT
ILIM
EN
RILIM
RFAULT
100 k
Control Signal
2.5V – 6.5V
VOUT
TPS2556/57
0.1 uF
CLOAD
Fault Signal
Power Pad
EN = Active Low for the TPS2556
EN = Active High for the TPS2557
1
2
3
4
5
6
OUT
FAULT
ILIM
IN
GND
IN
PAD
7
8
EN
OUT
TPS2556/57
DRB PACKAGE
(TOP VIEW)
www.ti.com
SLVS931 – NOVEMBER 2009
PRECISION ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
Check for Samples: TPS2556 TPS2557
1
FEATURES
DESCRIPTION
2
Meets USB Current-Limiting Requirements
Adjustable Current Limit, 500 mA–5 A (typ)
The TPS2556/57 power-distribution switches are
intended for applications where precision current
+/- 6.5% Current-Limit Accuracy at 4.5 A
limiting is required or heavy capacitive loads and
Fast Overcurrent Response - 3.5-
μS (typ)
short circuits are encountered. These devices offer a
22-m
High-Side MOSFET
programmable current-limit threshold between 500
mA and 5.0 A (typ) via an external resistor. The
Operating Range: 2.5 V to 6.5 V
power-switch rise and fall times are controlled to
2-
μA Maximum Standby Supply Current
minimize current surges during turn on/off.
Built-in Soft-Start
TPS2556/57 devices limit the output current to a safe
15 kV / 8 kV System-Level ESD Capable
level by switching into a constant-current mode when
UL Listed* – File No. E169910
the output load exceeds the current-limit threshold.
The
FAULT
logic
output
asserts
low
during
CB & Nemko Certification*
overcurrent and over temperature conditions.
*RILIM ≥ 24.9 k (5A maximum)
APPLICATIONS
USB Ports/Hubs
Digital TV
Set-Top Boxes
VOIP Phones
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.
Copyright 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
相关PDF资料
PDF描述
TPS2557DRB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TPS2561DRC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10
TPS2561DRCT 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10
TPS3305-20QDRQ1 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8
TPS3305-18QDRQ1 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8
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