Part Number: TPS27081ADDCR

Manufacturer: Texas Instruments

Description: IC PWR SWITCH 1:1 TSOT23-6

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of TPS27081ADDCR

Datasheet  TPS27081ADDCR datasheet
Category Integrated Circuits (ICs)
Family PMIC – Power Distribution Switches, Load Drivers
Manufacturer Texas Instruments
Packaging Tape & Reel (TR)
Part Status Active
Switch Type General Purpose
Number of Outputs 1
Ratio – Input:Output 1:1
Output Configuration High Side
Output Type
Interface On/Off
Voltage – Load 1.2 V ~ 8 V
Voltage – Supply (Vcc/Vdd) Not Required
Current – Output (Max) 3A
Rds On (Typ) 32 mOhm
Input Type
Features Slew Rate Controlled
Fault Protection
Operating Temperature -40°C ~ 85°C (TA)
Package / Case SOT-23-6 Thin, TSOT-23-6
Supplier Device Package 6-SOT

TPS27081ADDCR Introduction

The TPS27081A is a load switch that fits a power PFET and a control NFET into a small package. This makes it a very efficient and space-saving piece of equipment. It is compatible with other onboard parts because it has ESD protection on all pins, which is in line with industry standards, and it can handle up to 8 volts and 3 amps of current. The ON/OFF logic signal is converted to VIN levels by the device.

This means a higher voltage power supply can be controlled with as little as 1 volt of CPU or MCU logic, eliminating the need for an external level shifter. It does this by helping to lessen or eliminate power supply droop caused by high inrush currents, thanks to an adjustable turn-on and turn-off slew rate control done by external R1, R2, and C1. The part is a great choice for many uses, including standby power isolation, and boosts regulators with genuine shutdown.

TPS27081ADDCR Description

The TPS27081A is a high-side load switch. It has a Power PFET and a Control NFET on a single tiny chip. This switch can be used in a lot of different ways. Because each of its pins has better ESD protection, the TPS27081A works better with the other components on the board. Without a separate level shifter, the TPS27081A can convert 1 V logic levels from the CPU or MCU to VIN levels for ON/OFF logic signals. So, the TPS27081A can now work with higher voltage supplies.

An excessive inrush current may be made when an ON/OFF logic signal turns a large output capacitor CL on and off quickly. The inrush current of the load can be controlled by plugging in the resistor marked R2 and adding the capacitor marked C1, as shown in the simplified diagram. Check out the “Application and Implementation” section to learn how to set up the TPS27081A for a certain slew rate. For a standby power switch, you only need one R1 pullup resistor. If you don’t need the inrush current control feature of the TPS27081A, you can just connect the R2 pin of the device to the system ground.

TPS27081ADDCR Features

  • Turn-on and turn-off slew rates can be controlled outside with R1, R2, and C1.
  • Supports a Wide Range of Power Inputs, from 1.2 V to 8 V.
  • NMOS ON/OFF Supports a Wide Range of Control Logic Interfaces from 1 V to 8 V.

TPS27081ADDCR Detailed Description

The TPS27081A load switch can handle up to 8 volts and 3 amps. The device uses an ultra-low resistance P-channel MOSFET to lower the dropout voltage, which helps to reduce the voltage drop for low- and high-current rails. The device’s configurable slew rate aids in reducing or eliminating the power supply droop brought on by excessive inrush currents. When the device is turned off, it leaks a very small amount of current.

Feature Description

The TPS27081A part has a low-voltage power PMOS transistor that lets the load go through or switch between the supply and the load. Using an NMOS transistor that connects to different voltages from the GPIO, the device can turn on and off the PMOS. The PMOS switch is turned on when an input voltage greater than VIH, equal to 1 V, is applied. This happens because the input voltage moves the NMOS and the NMOS that controls the PMOS gate closer to the ground.

When you use R2 to control the rise time of the output and a pullup resistor R1 to connect the gate of the PMOS to the source to make sure it turns off, you need to make sure that the value of R1 is big enough to source a small enough amount of current into R2 that it doesn’t change the ON-state gate voltage of the PMOS very much. By using more ports, the user of a TPS27081A can change the rise time of the output by connecting passive devices between these pins, VIN and VOUT.

Device Functional Modes

quickest output growth When you need a faster output rise time, you must always connect pin 1 (R2) to the ground. Also, a capacitor should not be connected between VOUT (pins 2 and 3) and R1 and C1 under any circumstances (pin 6).

● Production increases are capped at a certain time

To change the rise time of the output, connect pin 1 (R2) to resistance and add a capacitor between pins 2 and 3 (VOUT) and R1 and C1. This is how the output’s rise time can be changed (pin 6).

System Examples

Isolation of Standby Power Some parts of many applications are always on to help with core functions. But some modules can be turned ON or OFF selectively to save power and share different onboard resources. These modules that can be turned on or off selectively need a standby power source. In these kinds of situations, TPS27081A only needs one pull-up resistor.

Boost Regulator With

A Full Freeze-Out Even when the regulator is turned off, the most prevalent topology for boost regulators consists of a current leakage channel that passes via an inductor and a diode before entering the feedback resistor. By introducing a TPS27081A device into the input-side power line of the circuit, this leakage current can be prevented, and a complete shutdown can be achieved.

Power Supply Recommendations

Between 1 and 8 volts is the VIN range that the device is made to work with. This supply must be carefully regulated and placed close to the device terminal. Also, it is recommended to use a 1 F bypass capacitor. If the power supply is more than a few inches away from the device’s terminals, it’s possible that the ceramic bypass capacitors won’t be enough, and you’ll need more bulk capacitance. If most of the circuit needs more capacitance, a capacitor with 1 F made of electrolytic, tantalum, or ceramic would be enough.


To sum up, the TPS27081A device is very useful and flexible for applications that involve switching loads. It is reliable and works well with other onboard components because it has a PFET with low resistance and ESD protection. The device’s configurable slew rate and level shifting simplify managing inrush currents and controlling a high-voltage power supply.

Its versatility makes it a great choice for various electronic applications, such as standby power isolation, and boosts regulators with true shutdown. If you want to know more about the TPS27081A or want to order it, please contact us at ICRFQ, the best electronic distributor in China. We promise to give you the best goods at the most affordable price.

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