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TPS2045

更新时间： 2024-09-19 22:42:03
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德州仪器 - TI 开关
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23页 407K
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CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

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TPS2045 数据手册

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TPS2045, TPS2055  
CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES  
SLVS182 – APRIL 1999  
features  
typical applications  
135-mΩ -Maximum (5-V Input) High-Side  
MOSFET Switch  
Notebook, Desktop and Palmtop PCs  
Monitors, Keyboards, Scanners, and  
Printers  
250 mA Continuous Current  
Short-Circuit and Thermal Protection With  
Overcurrent Logic Output  
Digital Cameras, Phones, and PBXs  
Hot-Insertion Applications  
Operating Range . . . 2.7-V to 5.5-V  
Logic-Level Enable Input  
TPS2045  
D OR P PACKAGE  
(TOP VIEW)  
TPS2055  
D OR P PACKAGE  
(TOP VIEW)  
2.5-ms Typical Rise Time  
Undervoltage Lockout  
GND  
IN  
OUT  
OUT  
OUT  
OC  
GND  
IN  
OUT  
OUT  
OUT  
OC  
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
10 µA Maximum Standby Supply Current  
Bidirectional Switch  
IN  
IN  
Available in 8-pin SOIC and PDIP Packages  
Ambient Temperature Range, –40°C to 85°C  
EN  
EN  
2-kV Human-Body-Model, 200-V  
Machine-Model ESD Protection  
description  
The TPS2045 and TPS2055 power-distribution switches are intended for applications where heavy capacitive  
loads and short circuits are likely. Each of these 135-mΩ N-channel MOSFET high-side power switches is  
controlledbyalogicenablecompatiblewith5-Vand3-Vlogic. Gatedriveisprovidedbyaninternalchargepump  
that controls the power-switch rise times and fall times to minimize current surges during switching. The charge  
pump requires no external components and allows operation from supplies as low as 2.7 V.  
When the output load exceeds the current-limit threshold or a short is present, the TPS2045 and TPS2055 limit  
the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OC) logic  
output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch,  
causingthejunctiontemperaturetorise, athermalprotectioncircuitshutsofftheswitchinovercurrenttoprevent  
damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal  
circuitry ensures the switch remains off until valid input voltage is present.  
The TPS2045 and TPS2055 are designed to limit at 0.44-A load. These power-distribution switches, available  
in 8-pin small-outline integrated circuit (SOIC) and 8-pin plastic dual-in-line packages (PDIP), operate over an  
ambient temperature range of –40°C to 85°C.  
AVAILABLE OPTIONS  
RECOMMENDED  
MAXIMUM CONTINUOUS  
LOAD CURRENT  
(A)  
PACKAGED DEVICES  
TYPICAL SHORT-CIRCUIT  
CURRENT LIMIT AT 25°C  
(A)  
T
A
ENABLE  
SOIC  
PDIP  
(P)  
†
(D)  
–40°C to 85°C Active low  
–40°C to 85°C Active high  
0.25  
0.25  
0.44  
0.44  
TPS2045D TPS2045P  
TPS2055D TPS2055P  
†
The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2045DR)  
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.  
Copyright 1999, Texas Instruments Incorporated  
This document contains information on products in more than one phase  
of development. The status of each device is indicated on the page(s)  
specifying its electrical characteristics.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...23

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TPS2045 替代型号

型号 品牌 替代类型 描述 数据表
TPS2045A TI

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