SLVSBT4A May   2013  – August 2015 TPS22924D

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics: VIN = 3.6 V
    7. 6.7 Switching Characteristics: VIN = 0.9 V
    8. 6.8 Dissipation Ratings
    9. 6.9 Typical Characteristics
  7. 7 Parametric Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 ON/OFF Control
      2. 8.3.2 Output Pulldown
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 VIN to VOUT Voltage Drop
      2. 9.1.2 Input Capacitor
      3. 9.1.3 Output Capacitor
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Managing Inrush Current
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8 Detailed Description

8.1 Overview

The TPS22924D is a single channel, 2-A load switch in a small, space-saving CSP-6 package. This device implements a low resistance N-channel MOSFET with a controlled rise time for applications that need to limit the inrush current.

This device is also designed to have very low leakage current during off state. This prevents downstream circuits from pulling high standby current from the supply. Integrated control logic, driver, power supply, and output discharge FET eliminates the need for additional external components, which reduces solution size and bill of materials (BOM) count.

8.2 Functional Block Diagram

TPS22924D Block_Diagram_SLVSBT4.gif

8.3 Feature Description

Table 1 lists the features of the TPS2222924D device.

Table 1. Feature List

DEVICE rON (TYP)
AT 3.6 V		 SLEW RATE (TYP)
AT 3.6 V		 QUICK OUTPUT DISCHARGE (1) MAXIMUM OUTPUT CURRENT ENABLE
TPS22924D 18.3 mΩ 6200 μs Yes 2 A Active high
(1) This feature discharges the output of the switch to ground through a 1250-Ω resistor, preventing the output from floating. See the Output Pulldown section in Application Information.

8.3.1 ON/OFF Control

The ON pin controls the state of the switch. Asserting ON high enables the switch. ON is active high and has a low threshold, making it capable of interfacing with low-voltage signals. The ON pin is compatible with standard GPIO logic threshold. It can be used with any microcontroller with 1.2-V, 1.8-V, 2.5-V or 3.3-V GPIOs.

8.3.2 Output Pulldown

The output pulldown is active when the user is turning off the main pass FET. The pulldown discharges the output rail to approximately 10% of the rail, then the output pulldown is automatically disconnected to optimize the shutdown current.

8.4 Device Functional Modes

Table 2 lists the functional modes of the TPS22924D device.

Table 2. Function Table

ON (Control Signal) VIN to VOUT VOUT to GND (1)
L OFF ON
H ON OFF