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參數(shù)資料
| 型號： | TPS2055P |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| 中文描述： | 限流配電開關 |
| 文件頁數(shù)： | 1/23頁 |
| 文件大小： | 406K |
| 代理商： | TPS2055P |
TPS2045, TPS2055
CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
SLVS182 – APRIL 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
features
135-m
-Maximum (5-V Input) High-Side
MOSFET Switch
250 mA Continuous Current
Short-Circuit and Thermal Protection With
Overcurrent Logic Output
Operating Range . . . 2.7-V to 5.5-V
Logic-Level Enable Input
2.5-ms Typical Rise Time
Undervoltage Lockout
10
μ
A Maximum Standby Supply Current
Bidirectional Switch
Available in 8-pin SOIC and PDIP Packages
Ambient Temperature Range, –40
°
C to 85
°
C
2-kV Human-Body-Model, 200-V
Machine-Model ESD Protection
typical applications
Notebook, Desktop and Palmtop PCs
Monitors, Keyboards, Scanners, and
Printers
Digital Cameras, Phones, and PBXs
Hot-Insertion Applications
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-m
N-channel MOSFET high-side power switches is
controlled by a logic enable compatible with 5-V and 3-V logic. Gate drive is provided by an internal charge pump
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,
causing the junction temperature to rise, a thermal protection circuit shuts off the switch in overcurrent to prevent
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)
TYPICAL SHORT-CIRCUIT
CURRENT LIMIT AT 25
°
C
(A)
PACKAGED DEVICES
TA
ENABLE
SOIC
(D)
PDIP
(P)
–40
°
C to 85
°
C
–40
°
C to 85
°
C
The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2045DR)
Active low
0.25
0.44
TPS2045D
TPS2045P
Active high
0.25
0.44
TPS2055D
TPS2055P
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.
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.
1
2
3
4
8
7
6
5
GND
IN
IN
EN
OUT
OUT
OUT
OC
TPS2045
D OR P PACKAGE
(TOP VIEW)
1
2
3
4
8
7
6
5
GND
IN
IN
EN
OUT
OUT
OUT
OC
TPS2055
D OR P PACKAGE
(TOP VIEW)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2055PE4 | 功能描述:電源開關 IC - USB DUAL HI-SIDE MOSFET RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2056 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DUAL CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| TPS2056A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| TPS2056AD | 功能描述:電源開關 IC - USB Dl .345A 2.7-5.5V Hi RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2056ADG4 | 功能描述:電源開關 IC - USB Dl .345A 2.7-5.5V Hi RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
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