Datasheet
TPS2044, TPS2054
QUAD POWER-DISTRIBUTION SWITCHES
SLVS174B – JULY 1998 – REVISED FEBRUARY 1999
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POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
135-mΩ -Maximum (5-V Input) High-Side
MOSFET Switch
500 mA Continuous Current per Channel
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
20-µA-Maximum Standby Supply Current
Bidirectional Switch
16-pin SOIC Package
Ambient Temperature Range, –40°C to 85°C
2-kV Human-Body-Model, 200-V
Machine-Model ESD Protection
UL Listed – File No. E169910
description
The TPS2044 and TPS2054 quad power-
distribution switches are intended for applications
where heavy capacitive loads and short circuits
are likely to be encountered. The TPS2044 and the TPS2054 incorporate in single packages four 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 that is compatible with 5-V logic 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 TPS2044 and TPS2054 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.
The TPS2044 and TPS2054 are designed to limit at 0.9-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 CONTINUOUS
TYPICAL SHORT-CIRCUIT
PACKAGED DEVICES
T
A
ENABLE
MAXIMUM
CONTINUOUS
LOAD CURRENT
(A)
CURRENT LIMIT AT 25°C
(A)
SOIC
(D)
†
–40°C to 85°C Active low 0.5 0.9 TPS2044D
–40°C to 85°C Active high 0.5 0.9 TPS2054D
†
The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2044DR)
Copyright 1999, Texas Instruments Incorporated
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.
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.
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GND1
IN1
EN1
EN2
GND2
IN2
EN3
EN4
OC1
OUT1
OUT2
OC2
OC3
OUT3
OUT4
OC4
TPS2044
D PACKAGE
(TOP VIEW)
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3
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5
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8
16
15
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11
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GND1
IN1
EN1
EN2
GND2
IN2
EN3
EN4
OC1
OUT1
OUT2
OC2
OC3
OUT3
OUT4
OC4
TPS2054
D PACKAGE
(TOP VIEW)