1 Features

• Input Voltage Range: 1.62 V to 5.5 V
• Low ON resistance
  • r_ON = 0.4 Ω at V_IN = 5.5 V
  • r_ON = 0.5 Ω at V_IN = 3.3 V
  • r_ON = 0.6 Ω at V_IN = 2.5 V
  • r_ON = 0.8 Ω at V_IN = 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.

1. For all available packages, see the orderable addendum at the end of the datasheet.