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TPS2045P Datasheet

  • TPS2045P

  • CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

  • 23頁

  • TI

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TPS2045, TPS2055
CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
SLVS182 鈥?APRIL 1999
features
typical applications
D
D
D
D
D
D
D
D
D
D
D
D
135-m鈩?-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
碌A(chǔ)
Maximum Standby Supply Current
Bidirectional Switch
Available in 8-pin SOIC and PDIP Packages
Ambient Temperature Range, 鈥?0擄C to 85擄C
2-kV Human-Body-Model, 200-V
Machine-Model ESD Protection
D
D
D
D
Notebook, Desktop and Palmtop PCs
Monitors, Keyboards, Scanners, and
Printers
Digital Cameras, Phones, and PBXs
Hot-Insertion Applications
TPS2045
D OR P PACKAGE
(TOP VIEW)
TPS2055
D OR P PACKAGE
(TOP VIEW)
GND
IN
IN
EN
1
2
3
4
8
7
6
5
OUT
OUT
OUT
OC
GND
IN
IN
EN
1
2
3
4
8
7
6
5
OUT
OUT
OUT
OC
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鈩?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 鈥?0擄C to 85擄C.
AVAILABLE OPTIONS
RECOMMENDED
MAXIMUM CONTINUOUS
LOAD CURRENT
(A)
0.25
0.25
TYPICAL SHORT-CIRCUIT
CURRENT LIMIT AT 25擄C
(A)
0.44
0.44
PACKAGED DEVICES
SOIC
(D)鈥?/div>
TPS2045D
TPS2055D
PDIP
(P)
TPS2045P
TPS2055P
TA
鈥?0擄C to 85擄C
鈥?0擄C to 85擄C
ENABLE
Active low
Active high
鈥?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.
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.
Copyright
漏
1999, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

TPS2045P 產(chǎn)品屬性

  • 50

  • 集成電路 (IC)

  • PMIC - 電源分配開關(guān)

  • -

  • 高端開關(guān)

  • 1

  • 95 毫歐

  • 是

  • 440mA

  • 2.7 V ~ 5.5 V

  • -40°C ~ 85°C

  • 通孔

  • 8-DIP（0.300"，7.62mm）

  • 8-PDIP

  • 管件

  • TPS2045AEVM-290-ND - TPS2045AEVM-290

  • 296-3402-5

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