SLUSD08A May   2017  – January 2018

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Simplified Schematic
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Ship Mode
        1. 9.3.1.1 Ship Mode Entry and Exit
      2. 9.3.2  High Impedance Mode
      3. 9.3.3  Active Battery Only Connected
      4. 9.3.4  Voltage Based Battery Monitor
      5. 9.3.5  Sleep Mode
      6. 9.3.6  Input Voltage Based Dynamic Power Management (VIN(DPM))
      7. 9.3.7  Input Overvoltage Protection and Undervoltage Status Indication
      8. 9.3.8  Battery Charging Process and Charge Profile
      9. 9.3.9  Dynamic Power Path Management Mode
      10. 9.3.10 Battery Supplement Mode
      11. 9.3.11 Default Mode
      12. 9.3.12 Termination and Pre-Charge Current Programming by External Components (IPRETERM)
      13. 9.3.13 Input Current Limit Programming by External Components (ILIM)
      14. 9.3.14 Charge Current Programming by External Components (ISET)
      15. 9.3.15 Safety Timer and Watchdog Timer
      16. 9.3.16 External NTC Monitoring (TS)
      17. 9.3.17 Thermal Protection
      18. 9.3.18 Typical Application Power Dissipation
      19. 9.3.19 Status Indicators (PG and INT)
      20. 9.3.20 Chip Disable (CD)
      21. 9.3.21 Buck (PWM) Output
      22. 9.3.22 Load Switch / LDO Output and Control
      23. 9.3.23 Manual Reset Timer and Reset Output (MR and RESET)
    4. 9.4 Device Functional Modes
    5. 9.5 Programming
      1. 9.5.1 Serial Interface Description
      2. 9.5.2 F/S Mode Protocol
    6. 9.6 Register Maps
      1. 9.6.1  Status and Ship Mode Control Register
        1. Table 12. Status and Ship Mode Control Register
      2. 9.6.2  Faults and Faults Mask Register
        1. Table 13. Faults and Faults Mask Register
      3. 9.6.3  TS Control and Faults Masks Register
        1. Table 14. TS Control and Faults Masks Register, Memory Location 0010
      4. 9.6.4  Fast Charge Control Register
        1. Table 15. Fast Charge Control Register
      5. 9.6.5  Termination/Pre-Charge and I2C Address Register
        1. Table 16. Termination/Pre-Charge and I2C Address Register
      6. 9.6.6  Battery Voltage Control Register
        1. Table 17. Battery Voltage Control Register
      7. 9.6.7  SYS VOUT Control Register
        1. Table 18. SYS VOUT Control Register
      8. 9.6.8  Load Switch and LDO Control Register
        1. Table 20. Load Switch and LDO Control Register
      9. 9.6.9  Push-button Control Register
        1. Table 21. Push-button Control Register
      10. 9.6.10 ILIM and Battery UVLO Control Register
        1. Table 22. ILIM and Battery UVLO Control Register, Memory Location 1001
      11. 9.6.11 Voltage Based Battery Monitor Register
        1. Table 23. Voltage Based Battery Monitor Register, Memory Location 1010
      12. 9.6.12 VIN_DPM and Timers Register
        1. Table 24. VIN_DPM and Timers Register
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Default Settings
        2. 10.2.2.2 Choose the Correct Inductance and Capacitance
        3. 10.2.2.3 Calculations
          1. 10.2.2.3.1 Program the Fast Charge Current (ISET)
          2. 10.2.2.3.2 Program the Input Current Limit (ILIM)
          3. 10.2.2.3.3 Program the Pre-charge/termination Threshold (IPRETERM)
          4. 10.2.2.3.4 TS Resistors (TS)
      3. 10.2.3 Application Performance Curves
        1. 10.2.3.1 Charger Curves
        2. 10.2.3.2 SYS Output Curves
        3. 10.2.3.3 Load Switch and LDO Curves
        4. 10.2.3.4 LS/LDO Output Curves
        5. 10.2.3.5 Timing Waveforms Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Trademarks
    3. 13.3 Electrostatic Discharge Caution
    4. 13.4 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

10.2.3.2 SYS Output Curves

bq25120A D001_SLUSBZ9.gif
TA = 25°C VSYS = 1.2 V
Figure 46. 1.2 VSYS System Efficiency
bq25120A D007_SLUSBZ9.gif
TA = 25°C VSYS = 1.8 V
Figure 48. 1.8 VSYS System Efficiency
bq25120A D013_SLUSBZ9.gif
TA = 25°C VSYS = 3.3 V
Figure 50. 3.3 VSYS System Efficiency
bq25120A D006_SLUSBZ9.gif
TA = 25°C VSYS = 1.5 V
Figure 52. 1.5 VSYS Load Regulation
bq25120A D012_SLUSBZ9.gif
TA = 25°C VSYS = 2.5 V
Figure 54. 2.5 VSYS Load Regulation
bq25120A D002_SLUSBZ9.gif
TA = 25°C VSYS = 1.2 V
Figure 56. 1.2 VSYS Line Regulation
bq25120A D008_SLUSBZ9.gif
TA = 25°C VSYS = 1.8 V
Figure 58. 1.8 VSYS Line Regulation
bq25120A D014_SLUSBZ9.gif
TA = 25°C VSYS = 3.3 V
Figure 60. 3.3 VSYS Line Regulation
bq25120A G010_slusbz9.gif
ILOAD = 10 µA
Figure 62. Light Load Operation Showing SW
bq25120A G012_slusbz9.gif
ILOAD = 1 mA
Figure 64. Light Load Operation Showing SW
bq25120A G014_slusbz9.gif
ILOAD = 100 mA
Figure 66. Light Load Operation Showing SW
bq25120A G016_slusbz9.gif
ILOAD = 300 mA
Figure 68. Light Load Operation Showing SW
bq25120A G018_slusbz9.gif
VSYS = 1.8 V
Figure 70. 1.8 VSYS Load Transient, 0 to 50 mA
bq25120A G020_slusbz9.gif
VSYS = 2.5 V
Figure 72. 2.5 VSYS Load Transient, 0 to 50 mA
bq25120A G022_slusbz9.gif
VSYS = 1.2 V
Figure 74. 1.2 VSYS Load Transient, 0 to 200 mA
bq25120A G024_slusbz9.gif
VSYS = 2.1 V
Figure 76. 2.1 VSYS Load Transient, 0 to 200 mA
bq25120A G026_slusbz9.gif
VSYS = 3.3 V
Figure 78. 3.3 VSYS Load Transient, 0 to 200 mA
bq25120A G028_slusbz9.gif
Figure 80. Short Circuit and Recovery for SYS
bq25120A D004_SLUSBZ9.gif
TA = 25°C VSYS = 1.5 V
Figure 47. 1.5 VSYS System Efficiency
bq25120A D010_SLUSBZ9.gif
TA = 25°C VSYS = 2.5 V
Figure 49. 2.5 VSYS System Efficiency
bq25120A D003_SLUSBZ9.gif
TA = 25°C VSYS = 1.2 V
Figure 51. 1.2 VSYS Load Regulation
bq25120A D009_SLUSBZ9.gif
TA = 25°C VSYS = 1.8 V
Figure 53. 1.8 VSYS Load Regulation
bq25120A D015_SLUSBZ9.gif
TA = 25°C VSYS = 3.3 V
Figure 55. 3.3 VSYS Load Regulation
bq25120A D005_SLUSBZ9.gif
TA = 25°C VSYS = 1.5 V
Figure 57. 1.5 VSYS Line Regulation
bq25120A D011_SLUSBZ9.gif
TA = 25°C VSYS = 2.1 V
Figure 59. 2.1 VSYS Line Regulation
bq25120A D023_SLUSBZ9.gif
Figure 61. 1.8 VSYS Switching Frequency vs Load Current
bq25120A G011_slusbz9.gif
ILOAD = 100 mA
Figure 63. Light Load Operation Showing SW
bq25120A G013_slusbz9.gif
ILOAD = 10 mA
Figure 65. Light Load Operation Showing SW
bq25120A G015_slusbz9.gif
ILOAD = 200 mA
Figure 67. Light Load Operation Showing SW
bq25120A G017_slusbz9.gif
VSYS = 1.2 V
Figure 69. 1.2 VSYS Load Transient, 0 to 50 mA
bq25120A G019_slusbz9.gif
VSYS = 2.1 V
Figure 71. 2.1 VSYS Load Transient, 0 to 50 mA
bq25120A G021_slusbz9.gif
VSYS = 3.3 V
Figure 73. 3.3 VSYS Load Transient, 0 to 50 mA
bq25120A G023_slusbz9.gif
VSYS = 1.8 V
Figure 75. 1.8 VSYS Load Transient, 0 to 200 mA
bq25120A G025_slusbz9.gif
VSYS = 2.5 V
Figure 77. 2.5 VSYS Load Transient, 0 to 200 mA
bq25120A G027_slusbz9.gif
Figure 79. Startup Showing SS on SYS in PWM Mode