TPS22918DBVR On-Resistance Load Switch: Layout, Pinout, and Datasheet

The TPS22918DBVR is a single-channel load switch with the adjustable rise and short output discharge times. An N-channel MOSFET is included in the device, which can function between 1 and 5.5 V and handle a maximum continuous current of 2 A. The switch is operated via an on/off input that can interface with low-voltage control signals directly.

The device's adjustable rise time minimizes inrush current induced by large bulk load capacitances, decreasing or eliminating power supply droop. The TPS22918DBVR has a programmable rapid output discharge (QOD) pin that adjusts the device's fall time, allowing for design flexibility in terms of power down and sequencing.

The TPS22918DBVR is available in a tiny, leaded SOT-23 package (DBV) that enables visual solder joint inspection. The gadget is designed to operate in a temperature range of –40°C to +105°C in free air.

The following shows TPS22918DBVR Pinout.

Pinout

The followings are TPS22918DBVR Symbol, Footprint and 3D Model.

Symbol

Footprint

3D Model

• Integrated Single Channel Load Switch 

• Ambient Operating Temperature: –40°C to +105°C

• Input Voltage Range: 1 V to 5.5 V

• On-Resistance (RON)

– RON = 52 mΩ (typical) at  VIN  = 5 V

– RON = 53 mΩ (typical) at VIN = 3.3 V

• 2-A Maximum Continuous Switch Current

• Low Quiescent Current 

– 8.3 µA (typical) at VIN = 3.3 V

• Low-Control Input-Threshold Enables Use of 1 V or Higher  GPIO 

• Adjustable Quick-Output Discharge (QOD)

• Configurable Rise Time With CT Pin

• Small SOT23-6 Package (DBV)

– 2.90-mm × 2.80-mm, 0.95-mm Pitch, 1.45 mm Height (with leads)

• ESD Performance Tested per JESD 22

– ±2-kV HBM and ±1-kV CDM

The following shows TPS22918DBVR Functional Block Diagram.

Functional Block Diagram

This typical application demonstrates how the TPS22918DBVR can be used to power downstream modules.

Typical Application

The following shows TPS22918DBVR Simplified Schematic.

Simplified Schematic

To accommodate the large current, VIN and VOUT traces should be as short and wide as possible.

With low ESR ceramic bypass capacitors, the VIN pin should be routed to the ground. 1-µF ceramic with X5R or X7R dielectric is a standard recommended bypass capacitance. This capacitor should be as close as feasible to the device pins.

Recommended Board Layout

• Industrial Systems

• Set Top Box

• Blood Glucose Meters

• Electronic Point of Sale

The following figure is TPS22918DBVR Package.

Package

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