TPS22945 5.5V, 0.2A, 500mΩ, 100mA Current Limit Load Switch | TI.com

TPS22945
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5.5V, 0.2A, 500mΩ, 100mA Current Limit Load Switch

 

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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.

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

Parametrics

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Part number Order Number of channels (#) Vin (Min) (V) Vin (Max) (V) Imax (A) Ron (Typ) (mOhm) Shutdown current (ISD) (Typ) (uA) Quiescent current (Iq) (Typ) (uA) Soft start Rise time (Typ) (us) Features Operating temperature range (C)
TPS22945 Order now 1     1.62     5.5     0.2     500     1     40     Fixed Rise Time     10     Thermal Shutdown     -40 to 85    
TPS22941 Order now 1     1.62     5.5     0.08     500     1     40     Fixed Rise Time     10     Active Low
Thermal Shutdown    
-40 to 85    
TPS22942 Order now 1     1.62     5.5     0.2     500     1     40     Fixed Rise Time     10     Active Low
Thermal Shutdown    
-40 to 85    
TPS22943 Order now 1     1.62     5.5     0.2     500     1     40     Fixed Rise Time     10     Thermal Shutdown     -40 to 85    
TPS22944 Order now 1     1.62     5.5     0.08     500     1     40     Fixed Rise Time     10     Thermal Shutdown     -40 to 85    
TPS22946 Order now 1     1.62     5.5     0.235     400     0.1     1.3     Fixed Rise Time     35     Thermal Shutdown     -40 to 85    
TPS22948 Order now 1     2.5     5.5     0.1     300     5     50     Fixed Rise Time     500     Reverse Current Blocking     -40 to 105    
TPS22949 Order now 1
2    
1.62