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TPS2057AD Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce TPS2057AD
Description  CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
Download  37 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS2057AD Fiches technique(HTML) 1 Page - Texas Instruments

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1
FEATURES
DESCRIPTION
1
2
3
4
8
7
6
5
GND
IN
IN
EN
OUT
OUT
OUT
OC
TPS2045A, TPS2055A
D PACKAGE
(TOP VIEW)
1
2
3
4
8
7
6
5
GND
IN
EN1
EN2
OC1
OUT1
OUT2
OC2
TPS2046A, TPS2056A
D PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GNDA
IN1
EN1
EN2
GNDB
IN2
EN3
EN4
OC1
OUT1
OUT2
OC2
OC3
OUT3
OUT4
OC4
TPS2048A, TPS2058A
D PACKAGE
(TOP VIEW)
All enable inputs are active high for the TPS205xA series.
NC – No connect
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GNDA
IN1
EN1
EN2
GNDB
IN2
EN3
NC
OC1
OUT1
OUT2
OC2
OC3
OUT3
NC
NC
TPS2047A, TPS2057A
D PACKAGE
(TOP VIEW)
TPS2045A
,, TPS2046A
TPS2047A, TPS2048A, TPS2055A
TPS2056A, TPS2057A, TPS2058A
SLVS251C – SEPTEMBER 2000 – REVISED JANUARY 2008
www.ti.com
CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
• 80-mΩ High-Side MOSFET Switch
• 250 mA Continuous Current Per Channel
• Independent Thermal and Short-Circuit
Protection With Overcurrent Logic Output
• Operating Range: 2.7-V to 5.5-V
• CMOS- and TTL-Compatible Enable Inputs
• 2.5-ms Typical Rise Time
• Undervoltage Lockout
• 10 µA Maximum Standby Supply Current
for Single and Dual
(20
µA for Triple and Quad)
• Bidirectional Switch
• Ambient Temperature Range, 0°C to 85°C
• ESD Protection
The TPS2045A through TPS2048A and TPS2055A
through TPS2058A power-distribution switches are
intended for applications where heavy capacitive
loads and short circuits are likely to be encountered.
These devices incorporate 80-m
Ω N-channel MOSFET high-side power switches for power-distribution systems
that require multiple power switches in a single package. Each switch is controlled by an independent logic
enable input. Gate drive is provided by an internal charge pump designed to control 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, these devices limit the output
current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) 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 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. These power-distribution switches are designed to current limit at
0.5 A.
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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000–2008, 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.


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