SLDS260A November   2019  – February 2021 TPS6521825

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1. 3.1 Simplified Schematic
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Wake-Up and Power-Up and Power-Down Sequencing
        1. 8.3.1.1  Power-Up Sequencing
        2. 8.3.1.2  Power-Down Sequencing
        3. 8.3.1.3  Strobe 1 and Strobe 2
        4. 8.3.1.4  Supply Voltage Supervisor and Power-Good (PGOOD)
        5. 8.3.1.5  Backup Supply Power-Good (PGOOD_BU)
        6. 8.3.1.6  Internal LDO (INT_LDO)
        7. 8.3.1.7  Current Limited Load Switches
          1. 8.3.1.7.1 Load Switch 1 (LS1)
          2. 8.3.1.7.2 Load Switch 2 (LS2)
          3. 8.3.1.7.3 Load Switch 3 (LS3)
        8. 8.3.1.8  LDO1
        9. 8.3.1.9  Coin Cell Battery Voltage Acquisition
        10. 8.3.1.10 UVLO
        11. 8.3.1.11 Power-Fail Comparator
        12. 8.3.1.12 Battery-Backup Supply Power-Path
        13. 8.3.1.13 DCDC3 and DCDC4 Power-Up Default Selection
        14. 8.3.1.14 I/O Configuration
          1. 8.3.1.14.1 Configuring GPO2 as Open-Drain Output
          2. 8.3.1.14.2 Using GPIO3 as Reset Signal to DCDC1 and DCDC2
        15. 8.3.1.15 Push Button Input (PB)
          1. 8.3.1.15.1 Signaling PB-Low Event on the nWAKEUP Pin
          2. 8.3.1.15.2 Push Button Reset
        16. 8.3.1.16 AC_DET Input (AC_DET)
        17. 8.3.1.17 Interrupt Pin (INT)
        18. 8.3.1.18 I2C Bus Operation
    4. 8.4 Device Functional Modes
      1. 8.4.1 Modes of Operation
      2. 8.4.2 OFF
      3. 8.4.3 ACTIVE
      4. 8.4.4 SUSPEND
      5. 8.4.5 RESET
    5. 8.5 Programming
      1. 8.5.1 Programming Power-Up Default Values
    6. 8.6 Register Maps
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Applications Without Backup Battery
      2. 9.1.2 Applications Without Battery Backup Supplies
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Output Filter Design
        2. 9.2.2.2 Inductor Selection for Buck Converters
        3. 9.2.2.3 Output Capacitor Selection
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.1.14 I/O Configuration

The device has two GPIOs and one GPO pin, which are configured as follows:

  • GPIO1:
    • General-purpose, open-drain output is controlled by the GPO1 user bit or sequencer.
    • DDR3 reset input signal from SOC. The signal is either latched or passed-through to the GPO2 pin. See Table 8-3 for details.
  • GPO2:
    • General-purpose output is controlled by the GPO2 user bit.
    • DDR3 reset output signal. Signal is controlled by GPIO1 and PGOOD. See Table 8-4 for details.
    • Output buffer is configured as open-drain or push-pull.
  • GPIO3:
    • General-purpose, open-drain output id controlled by the GPO3 user bit or sequencer.
    • Reset input-signal for DCDC1 and DCDC2.

Table 8-3 GPIO1 Configuration
IO1_SEL
(EEPROM)		GPO1
(USER BIT)		PGOOD
(PMIC SIGNAL)		GPIO1
(I/O PIN)		COMMENTS
00X0Open-drain output, driving low
01XHiZOpen-drain output, HiZ
Table 8-4 GPO2 Configuration
IO1_SEL
(EEPROM)		GPO2_BUF
(EEPROM)		GPO2
(USER BIT)		COMMENTS
000GPO2 is open drain output controlled by GPO2 user bit (driving low).
001GPO2 is open drain output controlled by GPO2 user bit (HiZ).
010GPO2 is push-pull output controlled by GPO2 user bit (driving low).
011GPO2 is push-pull output controlled by GPO2 user bit (driving high).
10XGPO2 is open drain output controlled by GPIO1 and PGOOD.
11XGPO2 is push-pull output controlled by GPIO1 and PGOOD.
Table 8-5 GPIO3 Configuration
DC12_RST
(EEPROM)		GPO3
(USER BIT)		GPIO3
(I/O PIN)		COMMENTS
000Open-drain output, driving low
01HiZOpen-drain output, HiZ
1XActive lowGPIO3 is DCDC1 and DCDC2 reset input signal to PMIC (active low). See Section 8.3.1.14.2 for details.