TPS22981 - 具有过流限制的 3.3V 至 18V MUX，TPS22981

TPS22981是TI德州仪器公司的一款无产品，TPS22981是具有过流限制的 3.3V 至 18V MUX，TPS22981，本站介绍了TPS22981的封装应用图解、特点和优点、功能等，并给出了与TPS22981相关的TI元器件型号供参考。

TPS22981 - 具有过流限制的 3.3V 至 18V MUX，TPS22981 - 无 - 电源多路复用器(MUX) - 德州仪器

产品特性

Powered from 3.3 V
4.5-V to 19.8-V High-Voltage Switch
3-V to 3.6-V Switch
Adjustable Current Limit
Thermal Shutdown
Make Before Break Switch
High-Voltage Discharge Before Low-Voltage Make
Reverse Current Blocking

产品应用

Notebook Computers
Desktop Computers
Power Management Systems

Typical Application

产品说明

The TPS22981 device is a current-limited power mux providing a connection to a peripheral device from either a low-voltage supply (3 V to 3.6 V) or a high-voltage supply (4.5 V to 19.8 V). The desired output is selected by digital control signals.

The high-voltage (VHV) and low-voltage (V3P3) switch current limits are set with external resistance. Once the current limit is reached, the TPS22981 will control the switch to maintain the current at this limit.

When the high-voltage supply is not present, the TPS22981 will maintain the connection to the output from the low-voltage supply. Upon the presence of a high-voltage line and high-voltage enable signal, the high-voltage switch is turned on in conjunction with the low-voltage switch until a reverse current is detected through the low-voltage switch, allowing a seamless transition from low voltage to the high-voltage supply with minimal droop and shoot-through current.

To prevent current backflow during a switch over from a VHV connection to a V3P3 connection, the TPS22981 will break the VHV connection, discharge the output to approximately 3.3 V and then make the V3P3 connection. The output may transition to 0 V when a load is present, before returning to 3.3 V.

The TPS22981 is available in a 4 mm × 4 mm × 1 mm VQFN package.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS22981	VQFN (20)	4.00 mm × 4.00 mm

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