SLVS832D November 2008  – July 2014 TPS22941 , TPS22942 , TPS22943 , TPS22944 , TPS22945

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2Handling Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5Electrical Characteristics
    6. 7.6Switching Characteristics
    7. 7.7Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Fault Reporting
      2. 8.3.2Current Limiting
      3. 8.3.3Thermal Shutdown
    4. 8.4Device Functional Modes
  9. Application and Implementation
    1. 9.1Application Information
      1. 9.1.1On/Off Control
      2. 9.1.2Undervoltage Lockout
      3. 9.1.3Reverse Voltage
      4. 9.1.4Input Capacitor
      5. 9.1.5Output Capacitor
    2. 9.2Typical Application
      1. 9.2.1Design Requirements
      2. 9.2.2Detailed Design Procedure
        1. 9.2.2.1VIN to VOUT Voltage Drop
        2. 9.2.2.2Maximum Output Capacitance
        3. 9.2.2.3Power Dissipation
        4. 9.2.2.4Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
    3. 11.3Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1Related Links
    2. 12.2Trademarks
    3. 12.3Electrostatic Discharge Caution
    4. 12.4Glossary
  13. 13Mechanical, Packaging, and Orderable Information

1 Features

  • Input Voltage Range: 1.62 V to 5.5 V
  • Low ON resistance
    • rON = 0.4 Ω at VIN = 5.5 V
    • rON = 0.5 Ω at VIN = 3.3 V
    • rON = 0.6 Ω at VIN = 2.5 V
    • rON = 0.8 Ω at VIN = 1.8 V
  • Minimum Current Limit: 40 mA or 100 mA
  • Undervoltage Lockout (UVLO)
  • Thermal Shutdown
  • Shutdown Current < 1 μA
  • Fast Current Limit Response Time
  • Fault Blanking
  • Auto Restart
  • 1.8-V Compatible Control Input Thresholds
  • ESD Performance Tested Per JESD 22
    • 4000-V Human-Body Model
      (A114-B, Class II)
    • 1000-V Charged-Device Model (C101)
  • Tiny SC-70 (DCK) Package
  • UL Recognized Component (UL File 169910)
  • Evaluated to IEC 60950-1, Ed 2, Am1, Annex CC, Test Program 2 with CB Report

2 Applications

  • Low-Current Sensor Protection
  • HDMI Connector Protection
  • Notebooks
  • PDAs
  • GPS Devices
  • MP3 Players
  • Peripheral Ports

3 Description

The TPS22941/2/3/4/5 load switches provide protection to systems and loads in high-current conditions. The devices contain a 0.4-Ω current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. Current is prevented from flowing when the MOSFET is off. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals. The TPS22941/2/3/4/5 includes thermal shutdown protection that prevents damage to the device when a continuous over-current condition causes excessive heating by turning off the switch.

These devices provide an integrated, robust solution to provide current limiting the output current to a safe level by switching into a constant-current mode when the ouptut load exceeds the current-limit threshold. The OC logic output asserts low during overcurrent, undervoltage, or overtemperature conditions. These additional features make the TPS22941/2/3/4/5 an ideal solution for applications where current limiting is necessary.

This family of devices are available in a SC70-5 (DCK) package. It is characterized for operation over the free-air temperature range of –40°C to 85°C.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
TPS22941 SC70 (5)2.00mm × 2.10 mm
TPS22942
TPS22943
TPS22944
TPS22945
  1. For all available packages, see the orderable addendum at the end of the datasheet.
g_ron_vin_lvs832.gif