TEXAS INSTRUMENTS TPS2047, TPS2057 Triple Current-Limited Power-Distribution Switches Data Sheet Manual

查询TPS2047供应商 TPS2047, TPS2057

TRIPLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

SLVS194 – APRIL 1999

features typical applications 135-mΩ -Maximum (5-V Input) High-Side Notebook, Desktop and Palmtop PCs MOSFET Switch

Monitors, Keyboards, Scanners, and

250 m A Continuous Current per Channel Printers Independent Short-Circuit and Thermal Digital Cameras, Phones, and PBXs Protection With Overcurrent Logic Output

Hot-Insertion Applications

Operating Range 2.7-V to 5.5-V

TPS2047 TPS2057 Logic-Level Enable Input D PACKAGE D PACKAGE (TOP VIEW) (TOP VIEW)

2.5-ms Typical Rise Time

GND1 OC1 GND1 OC1

Undervoltage Lockout

IN1 OUT1 IN1 OUT1

20 µA Maximum Standby Supply Current

EN1 OUT2 EN1 OUT2

Bidirectional Switch

EN2 OC2 EN2 OC2

Available in 16-pin SOIC Package GND2 OC3 GND2 OC3

Ambient Temperature Range, –40°C to 85°C IN2 OUT3 IN2 OUT3 EN3 NC EN3 NC

2-k V Human-Body-Model, 200-V

NC NC NC NC

Machine-Model ESD Protection

NC – No internal connection

description 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 PACKAGED DEVICES

TA ENABLE CONTINUOUS LOAD CURRENT CURRENT LIMIT AT 25°C SOIC

–40°C to 85°C Active low 0.25 0.44 TPS2047D –40°C to 85°C Active high 0.25 0.44 TPS2057D The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2047DR)

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.

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.

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