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  • TPS255xx Precision Adjustable Current-Limited Power-Distribution Switches

    • SLVS841F November   2008  – August 2016 TPS2552 , TPS2552-1 , TPS2553 , TPS2553-1

      PRODUCTION DATA.  

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  • TPS255xx Precision Adjustable Current-Limited Power-Distribution Switches
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Overcurrent Conditions
      2. 9.3.2 Reverse-Voltage Protection
      3. 9.3.3 FAULT Response
      4. 9.3.4 Undervoltage Lockout (UVLO)
      5. 9.3.5 ENABLE (EN or EN)
      6. 9.3.6 Thermal Sense
    4. 9.4 Device Functional Modes
    5. 9.5 Programming
      1. 9.5.1 Programming the Current-Limit Threshold
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Constant-Current vs Latch-Off Operation and Impact on Output Voltage
    2. 10.2 Typical Applications
      1. 10.2.1 Two-Level Current-Limit Circuit
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedures
          1. 10.2.1.2.1 Designing Above a Minimum Current Limit
          2. 10.2.1.2.2 Designing Below a Maximum Current Limit
          3. 10.2.1.2.3 Accounting for Resistor Tolerance
          4. 10.2.1.2.4 Input and Output Capacitance
        3. 10.2.1.3 Application Curves
      2. 10.2.2 Auto-Retry Functionality
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
      3. 10.2.3 Typical Application as USB Power Switch
        1. 10.2.3.1 Design Requirements
          1. 10.2.3.1.1 USB Power-Distribution Requirements
        2. 10.2.3.2 Detailed Design Procedure
          1. 10.2.3.2.1 Universal Serial Bus (USB) Power-Distribution Requirements
  11. 11Power Supply Recommendations
    1. 11.1 Self-Powered and Bus-Powered Hubs
    2. 11.2 Low-Power Bus-Powered and High-Power Bus-Powered Functions
    3. 11.3 Power Dissipation and Junction Temperature
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
    2. 13.2 Related Links
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information
  15. IMPORTANT NOTICE
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DATA SHEET

TPS255xx Precision Adjustable Current-Limited Power-Distribution Switches

1 Features

  • Up to 1.5-A Maximum Load Current
  • ±6% Current-Limit Accuracy at 1.7 A (Typical)
  • Meets USB Current-Limiting Requirements
  • Backwards Compatible With TPS2550 and TPS2551
  • Adjustable Current Limit: 75 mA to 1700 mA (Typical)
  • Constant-Current (TPS255x) and Latch-Off (TPS255x-1) Versions
  • Fast Overcurrent Response - 2 µs (Typical)
  • 85-mΩ High-Side MOSFET (DBV Package)
  • Reverse Input-Output Voltage Protection
  • Operating Range: 2.5 V to 6.5 V
  • Built-In Soft Start
  • 15-kV ESD Protection per IEC 61000-4-2 (With External Capacitance)
  • UL Listed – File No. E169910 and NEMKO IEC60950-1-am1 ed2.0
  • See the TI Switch Portfolio

2 Applications

  • USB Ports and Hubs
  • Digital TVs
  • Set-Top Boxes
  • VOIP Phones

3 Description

The TPS255x and TPS255x-1 power-distribution switches are intended for applications where precision current limiting is required or heavy capacitive loads and short circuits are encountered and provide up to 1.5 A of continuous load current. These devices offer a programmable current-limit threshold between 75 mA and 1.7 A (typical) through an external resistor. Current-limit accuracy as tight as ±6% can be achieved at the higher current-limit settings. The power-switch rise and fall times are controlled to minimize current surges during turnon and turnoff.

TPS255x devices limit the output current to a safe level by using a constant-current mode when the output load exceeds the current-limit threshold. TPS255x-1 devices provide circuit breaker functionality by latching off the power switch during overcurrent or reverse-voltage situations. An internal reverse-voltage comparator disables the power-switch when the output voltage is driven higher than the input to protect devices on the input side of the switch. The FAULT output asserts low during overcurrent and reverse-voltage conditions.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS2552 SOT-23 (6) 2.90 mm x 1.60 mm
WSON (6) 2.00 mm x 2.00 mm
TPS2553 SOT-23 (6) 2.90 mm x 1.60 mm
WSON (6) 2.00 mm x 2.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application

TPS2552 TPS2553 TPS2552-1 TPS2553-1 first_page_2_lvs841.gif

4 Revision History

Changes from E Revision (February 2012) to F Revision

  • Added ESD Rating table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go
  • Changed 1300 mA to 1700 mA in the adjustable current limit bullet under the Features sectionGo
  • Changed from 1.2 A to 1.5 AGo

Changes from D Revision (June 2011) to E Revision

  • Changed VEN to VEN in Recommended Operating ConditionsGo
  • Changed VEN to VEN in Recommended Operating ConditionsGo

Changes from C Revision (September 2009) to D Revision

  • Changed From: Fast Overcurrent Response - 2-µS (typ) To: Fast Overcurrent Response - 2-µs (typ) in the FeaturesGo
  • Added text To Feature - UL Listed "and NEMKO IEC60950-1-am1 ed2.0"Go
  • Added Features Item "See the TI Switch Portfoilo"Go
  • Changed the DEVICE INFORMATION table, and Deleted Note 3Go
  • Added ESD-system level (contact/air) to the ABS MAX table, and Added Note 3Go
  • Added text to the REVERSE-VOLTAGE PROTECTION section: "A reverse.....when this occurs."Go

Changes from B Revision (February 2009) to C Revision

  • Added Feature - Up to 1.5 A Maximum Load CurrentGo
  • Changed 1.3 A (typ) To: 1.7 A (typ)Go
  • Added Text - and provide up to 1.5 A of continuous load currentGo
  • Changed From: 19.1 kΩ ≤ RILIM ≤ 232 kΩ To: 15 kΩ ≤ RILIM ≤ 232 kΩ.Go
  • Changed IOUT values for 1.2A and 1.5AGo
  • Changed TJ values for 1.2A and 1.5AGo
  • Added RILIM = 15 kΩ optionGo
  • Changed Text From: current-limit threshold between 75 mA and 1.3 A (typ) To: current-limit threshold between 75 mA and 1.7 A (typ)Go
  • Changed Text From: The recommended 1% resistor range for RILIM is 19.1 kΩ ≤ RILIM ≤ 232 kΩ to ensure stability To: The recommended 1% resistor range for RILIM is 15 kΩ ≤ RILIM ≤ 232 kΩ to ensure stabilityGo
  • Changed Figure 23 - Current-Limit Threshold vs RILIM Go
  • Changed Table 2 - added rows for Current Limit of 1400 to 1700Go

Changes from A Revision (December 2008) to B Revision

  • Added To Features - UL Listed – File No. E169910Go
  • Changed Figure 17 Ttitle From: Current Limit Threshold Vs RILM Go
  • Changed Figure 18 Ttitle From: Current Limit Threshold Vs RILM Go

Changes from * Revision (November 2008) to A Revision

  • Changed Title from: Adjustable Current-Limited Power-Distribution Switches to: Precision Adjustable Current-Limited Power-Distribution SwitchesGo

 
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