TPS2047_14 Datasheet, PDF (1/27 Pages) Texas Instruments – TRIPLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

TPS2047, TPS2057
TRIPLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
SLVS194 – APRIL 1999
features
D 135-mΩ -Maximum (5-V Input) High-Side
MOSFET Switch
D 250 mA Continuous Current per Channel
D Independent Short-Circuit and Thermal
Protection With Overcurrent Logic Output
D Operating Range . . . 2.7-V to 5.5-V
D Logic-Level Enable Input
D 2.5-ms Typical Rise Time
D Undervoltage Lockout
D 20 µA Maximum Standby Supply Current
D Bidirectional Switch
D Available in 16-pin SOIC Package
D Ambient Temperature Range, –40°C to 85°C
D 2-kV Human-Body-Model, 200-V
Machine-Model ESD Protection
typical applications
D Notebook, Desktop and Palmtop PCs
D Monitors, Keyboards, Scanners, and
Printers
D Digital Cameras, Phones, and PBXs
D Hot-Insertion Applications
TPS2047
D PACKAGE
(TOP VIEW)
TPS2057
D PACKAGE
(TOP VIEW)
GND1 1
IN1 2
EN1 3
EN2 4
GND2 5
IN2 6
EN3 7
NC 8
16 OC1
15 OUT1
14 OUT2
13 OC2
12 OC3
11 OUT3
10 NC
9 NC
GND1 1
IN1 2
EN1 3
EN2 4
GND2 5
IN2 6
EN3 7
NC 8
16 OC1
15 OUT1
14 OUT2
13 OC2
12 OC3
11 OUT3
10 NC
9 NC
description
NC – No internal connection
The TPS2047 and TPS2057 triple power-distribution switches are intended for applications where heavy
capacitive loads and short circuits are likely. These devices incorporate in single packages three 135-mΩ
N-channel MOSFET high-side power switches for power-distribution systems that require multiple power
switches. Each switch 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, requiring no external components, 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 TPS2047 and TPS2057 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 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 TPS2047 and TPS2057 are designed to limit at 0.44-A load. These power-distribution switches are
available in 16-pin small-outline integrated circuit (SOIC) packages and operate over an ambient temperature
range of –40°C to 85°C.
AVAILABLE OPTIONS
RECOMMENDED MAXIMUM
TYPICAL SHORT-CIRCUIT
TA
ENABLE CONTINUOUS LOAD CURRENT
CURRENT LIMIT AT 25°C
(A)
(A)
–40°C to 85°C Active low
0.25
0.44
–40°C to 85°C Active high
0.25
0.44
† _{The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2047DR)}
PACKAGED DEVICES
SOIC
(D)†
TPS2047D
TPS2057D
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.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1999, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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