DUAL POWER-DISTRIBUTION SWITCHES
D 135-mΩ -Maximum (5-V Input) High-Side
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
D Undervoltage Lockout
D 10 µA Maximum Standby Supply Current
D Bidirectional Switch
D Available in 8-pin SOIC and PDIP Packages
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
SLVS173A – AUGUST 1998 – REVISED APRIL 1999
D OR P PACKAGE
D OR P PACKAGE
The TPS2042 and TPS2052 dual power distribution switches are intended for applications where heavy
capacitive loads and short circuits are likely to be encountered. The TPS2042 and the TPS2052 incorporate
in single packages two 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 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, the TPS2042 and TPS2052 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 TPS2042 and TPS2052 are designed to limit at 0.9-A load. These power distribution switches are available
in 8-pin small-outline integrated circuit (SOIC) and 8-pin plastic dual-in-line packages (PDIP) and operate over
an ambient temperature range of –40°C to 85°C.
MAXIMUM CONTINUOUS SHORT-CIRCUIT CURRENT
LIMIT AT 25°C
(A) (A) (D)† (P)
–40°C to 85°C Active low
–40°C to 85°C Active high
† The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2042DR)
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
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