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TPS2057A Dataheets PDF



Part Number TPS2057A
Manufacturers Texas Instruments
Logo Texas Instruments
Description CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
Datasheet TPS2057A DatasheetTPS2057A Datasheet (PDF)

www.ti.com TPS2045A, TPS2046A TPS2047A, TPS2048A, TPS2055A TPS2056A, TPS2057A, TPS2058A SLVS251C – SEPTEMBER 2000 – REVISED JANUARY 2008 CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES FEATURES 1 • 80-mΩ High-Side MOSFET Switch • 250 mA Continuous Current Per Channel • Independent Thermal and Short-Circuit Protection With Overcurrent Logic Output • Operating Range: 2.7-V to 5.5-V • CMOS- and TTL-Compatible Enable Inputs • 2.5-ms Typical Rise Time • Undervoltage Lockout • 10 µA Maximum Standby Supp.

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www.ti.com TPS2045A, TPS2046A TPS2047A, TPS2048A, TPS2055A TPS2056A, TPS2057A, TPS2058A SLVS251C – SEPTEMBER 2000 – REVISED JANUARY 2008 CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES FEATURES 1 • 80-mΩ High-Side MOSFET Switch • 250 mA Continuous Current Per Channel • Independent Thermal and Short-Circuit Protection With Overcurrent Logic Output • Operating Range: 2.7-V to 5.5-V • CMOS- and TTL-Compatible Enable Inputs • 2.5-ms Typical Rise Time • Undervoltage Lockout • 10 µA Maximum Standby Supply Current for Single and Dual (20 µA for Triple and Quad) • Bidirectional Switch • Ambient Temperature Range, 0°C to 85°C • ESD Protection DESCRIPTION The TPS2045A through TPS2048A and TPS2055A through TPS2058A power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely to be encountered. TPS2045A, TPS2055A D PACKAGE (TOP VIEW) GND IN IN EN† 1 2 3 4 8 OUT 7 OUT 6 OUT 5 OC TPS2046A, TPS2056A D PACKAGE (TOP VIEW) GND IN EN1† EN2† 1 2 3 4 8 OC1 7 OUT1 6 OUT2 5 OC2 TPS2047A, TPS2057A D PACKAGE (TOP VIEW) TPS2048A, TPS2058A D PACKAGE (TOP VIEW) GNDA IN1 EN1† EN2† GNDB IN2 EN3† NC 1 2 3 4 5 6 7 8 16 OC1 15 OUT1 14 OUT2 13 OC2 12 OC3 11 OUT3 10 NC 9 NC GNDA IN1 EN1† EN2† GNDB IN2 EN3† EN4† 1 2 3 4 5 6 7 8 16 OC1 15 OUT1 14 OUT2 13 OC2 12 OC3 11 OUT3 10 OUT4 9 OC4 † All enable inputs are active high for the TPS205xA series. NC – No connect These devices incorporate 80-mΩ N-channel MOSFET high-side power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by an independent logic enable input. 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, these devices 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. These power-distribution switches are designed to current limit at 0.5 A. 1 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 the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2000–2008, Texas Instruments Incorporated TPS2045A, TPS2046A TPS2047A, TPS2048A, TPS2055A TPS2056A, TPS2057A, TPS2058A SLVS251C – SEPTEMBER 2000 – REVISED JANUARY 2008 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. AVAILABLE OPTIONS(1) TA 0°C to 85°C ENABLE Active low Active high Active low Active high Active low Active high Active low Active high RECOMMENDED MAXIMUM CONTINUOUS LOAD CURRENT (A) TYPICAL SHORT-CIRCUIT CURRENT LIMIT AT 25°C (A) NUMBER OF SWITCHES Single Dual 0.25 0.5 Triple Quad PACKAGED DEVICES SOIC (D)(2) TPS2045AD TPS2055AD TPS2046AD TPS2056AD TPS2047AD TPS2057AD TPS2048AD TPS2058AD (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. (2) The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2045ADR) 2 Submit Documentation Feedback Copyright © 2000–2008, Texas Instruments Incorporated Product Folder Link(s): TPS2045A TPS2046A TPS2047A TPS2048A TPS2055A TPS2056A TPS2057A TPS2058A www.ti.com TPS2045A TPS2046A TPS2045A, TPS2046A TPS2047A, TPS2048A, TPS2055A TPS2056A, TPS2057A, TPS2058A SLVS251C – SEPTEMBER 2000 – REVISED JANUARY 2008 FUNCTIONAL BLOCK DIAGRAMS Power Switch IN Charge Pump EN‡ Driver UVLO GND † Current sense ‡ Active high for TPS205xA series Thermal Sense † CS Current Limit OUT OC GND EN1‡ Charge Pump UVLO IN Charge Pump EN2‡ Thermal Sense Driver Current Limit † CS Power Switch † CS Driver Current Limit Thermal Sense OC1 OUT1 OUT2 OC2 † Current sense ‡ Active high for TPS205xA series Copyright © 2000–2008, Texas Instruments Incorporated Submi.


TPS2056A TPS2057A TPS2058A


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