SLVS841G November   2008  – October 2026 TPS2552 , TPS2552-1 , TPS2553 , TPS2553-1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Overcurrent Conditions
      2. 8.3.2 Reverse-Voltage Protection
      3. 8.3.3 FAULT Response
      4. 8.3.4 Undervoltage Lockout (UVLO)
      5. 8.3.5 ENABLE (EN or EN)
      6. 8.3.6 Thermal Sense
      7. 8.3.7 Quick Output Discharge
    4. 8.4 Device Functional Modes
    5. 8.5 Programming
      1. 8.5.1 Programming the Current-Limit Threshold
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Constant-Current vs Latch-Off Operation and Impact on Output Voltage
    2. 9.2 Typical Applications
      1. 9.2.1 Two-Level Current-Limit Circuit
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedures
          1. 9.2.1.2.1 Designing Above a Minimum Current Limit
          2. 9.2.1.2.2 Designing Below a Maximum Current Limit
          3. 9.2.1.2.3 Accounting for Resistor Tolerance
          4. 9.2.1.2.4 Input and Output Capacitance
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Auto-Retry Functionality
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
      3. 9.2.3 Typical Application as USB Power Switch
        1. 9.2.3.1 Design Requirements
          1. 9.2.3.1.1 USB Power-Distribution Requirements
        2. 9.2.3.2 Detailed Design Procedure
          1. 9.2.3.2.1 Universal Serial Bus (USB) Power-Distribution Requirements
    3. 9.3 Power Supply Recommendations
      1. 9.3.1 Self-Powered and Bus-Powered Hubs
      2. 9.3.2 Low-Power Bus-Powered and High-Power Bus-Powered Functions
      3. 9.3.3 Power Dissipation and Junction Temperature
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

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 1.5A of continuous load current. These devices offer a programmable current-limit threshold from 75mA to 1.7A (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.

The TPS25530-1 devices have an integrated quick output discharge path when the switch is turned off, pulling the output down to ground. The current limit range is also extended to 2.64A (typical) with the 10kΩ ILIM setting for this device.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
TPS2552 SOT-23 (6) 2.90mm × 1.60mm
WSON (6) 2.00mm × 2.00mm
TPS2553 SOT-23 (6) 2.90mm × 1.60mm
WSON (6) 2.00mm × 2.00mm
(1) For all available packages, see the orderable addendum at the end of the datasheet
(2) The package size (length × width) is a nominal value and includes pins, where applicable
TPS2552 TPS2552-1 TPS2553 TPS2553-1 Typical Application
Typical Application