SNVSCN9A September   2024  – December 2024 TPS3423 , TPS3424

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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 Timing Requirements
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Inputs
        1. 7.3.1.1 Push-Button Input (PB)
        2. 7.3.1.2 Push-Button Timing Programmability
        3. 7.3.1.3 KILL
      2. 7.3.2 Outputs
        1. 7.3.2.1 Interrupt (INT)
        2. 7.3.2.2 RESET / RESET
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Power Button Control with TPS3424
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 PB and RESET Topology
          2. 8.2.1.2.2 Short Press Time (tSP) and Long Press Time (tLP) selection
          3. 8.2.1.2.3 Interrupt and Kill Feature
        3. 8.2.1.3 Application Curve
      2. 8.2.2 High Voltage Connection
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.1.1 Push-Button Input (PB)

Push-button input (PB) for TPS3423 and TPS3424 is available in active low and active high configuration as per Table 7-1 as shown from Figure 7-1 to Figure 7-4.

Table 7-1 Push-Button Configuration
PUSH-BUTTON CONFIGURATION INTERNAL RESISTOR ORIENTATION PB TRIGGER STATE
Active low 1000kΩ , pulled up to VDD Falling edge on PB pin if INT is not asserted.
Active High 1000kΩ , pulled down to GND Rising edge on PB pin if INT is not asserted.
PB pin should be connected to a switch with ON resistance less than 20% of the pull-up / pull-down resistance to provide the correct PB input trigger for the device.

A precise timer gets started once PB pin is triggered by rising or falling edge for active high or active low configuration respectively. The device generates the output corresponding to short press, once PB pin is kept low (for active low PB) or kept high (for active high PB) for more than short press (tSP) duration. The device generates output corresponding to long press if the PB pin is held in the same state for long press (tLP) duration. The timer stops and gets reset when PB pin is released. If PB is released during interrupt pulse (Figure 7-5), non-latched RESET pulse or KILL debounce time then next PB input is ignored as described in Section 6.7 and Figure 7-6.

TPS3423 TPS3424 Push Button Functionality Figure 7-5 Push Button Functionality
TPS3423 TPS3424 Push Button Transition Behavior at INT Pulse Figure 7-6 Push Button Transition Behavior at INT Pulse

TPS3423 has two independent push-button pins PB1 and PB2. These pins are factory programmed for short press (tSP) and long press (tLP) duration. TPS3424 has single PB pin. PB pin in TPS3424 is available both in fixed timing and user programmable option (8-pin DRL package) through capacitor connection on SPT and LPT pins. SPT and LPT pins must be floating for fixed timing option of TPS3424.