TPS22945DCKR.A中文资料德州仪器数据手册PDF规格书

1 Features

1• 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

– r ON = 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.