SLUSE99C September   2021  – January 2023 BQ25180

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 Thermal Information
    4. 7.4 Recommended Operating Conditions
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
      1. 8.1.1 Battery Charging Process
        1. 8.1.1.1 Trickle Charge
        2. 8.1.1.2 Precharge
        3. 8.1.1.3 Fast Charge
        4. 8.1.1.4 Termination
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Input Voltage Based Dynamic Power Management (VINDPM)
      2. 8.3.2  Dynamic Power Path Management Mode (DPPM)
      3. 8.3.3  Battery Supplement Mode
      4. 8.3.4  SYS Power Control (SYS_MODE bit control)
        1. 8.3.4.1 SYS Pulldown Control
      5. 8.3.5  SYS Regulation
      6. 8.3.6  ILIM Control
      7. 8.3.7  Protection Mechanisms
        1. 8.3.7.1 Input Overvoltage Protection
        2. 8.3.7.2 Battery Undervoltage Lockout
        3. 8.3.7.3 System Overvoltage Protection
        4. 8.3.7.4 System Short Protection
        5. 8.3.7.5 Battery Overcurrent Protection
        6. 8.3.7.6 Safety Timer and Watchdog Timer
        7. 8.3.7.7 Thermal Protection and Thermal Regulation
      8. 8.3.8  Pushbutton Wake and Reset Input
        1. 8.3.8.1 Pushbutton Wake or Short Button Press Functions
        2. 8.3.8.2 Pushbutton Reset or Long Button Press Functions
      9. 8.3.9  15-Second Timeout for HW Reset
      10. 8.3.10 Hardware Reset
      11. 8.3.11 Software Reset
      12. 8.3.12 Interrupt Indicator (/INT) Pin
      13. 8.3.13 External NTC Monitoring (TS)
        1. 8.3.13.1 TS Biasing and Function
      14. 8.3.14 I2C Interface
        1. 8.3.14.1 F/S Mode Protocol
    4. 8.4 Device Functional Modes
    5. 8.5 Register Maps
      1. 8.5.1 I2C Registers
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Input (IN/SYS) Capacitors
        2. 9.2.2.2 TS
        3. 9.2.2.3 Recommended Passive Components
      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 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    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

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YBG|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.5 SYS Regulation

The device includes a SYS voltage regulation loop. By regulating the SYS voltage the device prevents downstream devices connected to SYS from being exposed to voltages as high as VIN_OVP. SYS regulation is only active when VIN > VUVLO, VIN > VBAT + VSLEEPZ and VIN < VIN_OVP rather than meeting the VIN_Powergood condition.

The SYS voltage regulation target can be controlled through the SYS_REG_CTRL_2:0 bits in the SYS_REG register to either track the battery, set to a fixed voltage, or enable pass through modes.

In battery tracking mode, the minimum voltage is at the VMINSYS value for a battery < 3.6 V. As battery voltage increases VSYS is regulated to 225 mV above battery. If VIN < VMINSYS and VIN_Powergood is still active, then SYS will be in dropout.

In fixed voltage mode, SYS voltage is regulated to a target set by the host ranging from 4.4 V to 4.9 V. If VIN voltage is less than the SYS target voltage, then the device will be in dropout mode.

In pass through mode, the SYS path is unregulated and the VSYS voltage is equal to VIN.

Table 8-3 SYS Voltage Regulation Settings
SYS_REG_CTRLVSYS TARGET

000

VBAT + 225 mV (3.8 V minimum)

001

4.4

010 (default)

4.5

011

4.6

100

4.7

101

4.8

110

4.9

111

Pass through