TPS2044, TPS2054
QUAD POWER-DISTRIBUTION SWITCHES
SLVS174B – JULY 1998 – REVISED FEBRUARY 1999
D 135-mΩ -Maximum (5-V Input) High-Side
MOSFET Switch
D 500 mA Continuous Current per Channel
D 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
TPS2044
D PACKAGE
(TOP VIEW)
GND1
IN1
EN1
EN2
GND2
IN2
1
2
3
4
5
6
16 OC1
15 OUT1
14 OUT2
13 OC2
12 OC3
11 OUT3
D Undervoltage Lockout
D 20-µA-Maximum Standby Supply Current
D Bidirectional Switch
D 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
D UL Listed – File No. E169910
EN3 7
EN4 8
10 OUT4
9 OC4
TPS2054
D PACKAGE
(TOP VIEW)
GND1
IN1
EN1
EN2
1
2
3
4
16 OC1
15 OUT1
14 OUT2
13 OC2
description
GND2 5
IN2 6
12 OC3
11 OUT3
The TPS2044 and TPS2054 quad power-
EN3 7 10 OUT4
distribution switches are intended for applications
EN4 8
9 OC4
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
TA
ENABLE
RECOMMENDED
MAXIMUM CONTINUOUS
LOAD CURRENT
(A)
TYPICAL SHORT-CIRCUIT
CURRENT LIMIT AT 25°C
(A)
–40°C to 85°C Active low
0.5
0.9
–40°C to 85°C Active high
0.5
0.9
† The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2044DR)
PACKAGED DEVICES
SOIC
(D)†
TPS2044D
TPS2054D
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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