SLVSHK6A March   2025  – March 2026 TPS61381-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 I2C Timing Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 VCC Power Supply and UVLO Logic
      2. 6.3.2 Enable or Shutdown
      3. 6.3.3 Device Operating Modes and Control Logic
      4. 6.3.4 Status Indicator IO (STATUS Pin)
      5. 6.3.5 Thermal Shutdown
    4. 6.4 Charger Feature Description
      1. 6.4.1 Charger Enable
      2. 6.4.2 LDO Charger
      3. 6.4.3 NiMH Battery Charging Profile
      4. 6.4.4 Lithium Battery Charging Profile
      5. 6.4.5 Super Capacitor Charging Profile
      6. 6.4.6 Battery Cold, Hot Temperature (TS Pin)
      7. 6.4.7 Charger Protection and Fault Condition Indication
    5. 6.5 Boost Feature Description
      1. 6.5.1 Enable and Start up
        1. 6.5.1.1 Automatic Transition into Boost Mode
        2. 6.5.1.2 Manual Transition into Boost Mode
      2. 6.5.2 Down Mode
      3. 6.5.3 Output Short- to-Ground Protection
      4. 6.5.4 Boost Control Loop
      5. 6.5.5 Current Limit Operation
      6. 6.5.6 Functional Modes at Light Load
        1. 6.5.6.1 Auto PFM Mode
        2. 6.5.6.2 Forced PWM Mode
      7. 6.5.7 Duty Cycle Limitation
      8. 6.5.8 BUB Voltage Loop
      9. 6.5.9 Spread Spectrum
    6. 6.6 Battery State-of-Health (SOH) Detection Feature Description
      1. 6.6.1 SOH Mode Operation
      2. 6.6.2 Multi-Signal Output in AVI Pin
      3. 6.6.3 Calculate Impedance of BUB
    7. 6.7 I2C Serial Interface
      1. 6.7.1 Data Validity
      2. 6.7.2 START and STOP Conditions
      3. 6.7.3 Byte Format
      4. 6.7.4 Acknowledge (ACK) and Not Acknowledge (NACK)
      5. 6.7.5 Slave Address and Data Direction Bit
      6. 6.7.6 Single Read and Write
      7. 6.7.7 Multi-Read and Multi-Write
  8. 7 Register Maps
    1. 7.1  Register 00H: CHIP_ID
    2. 7.2  Register 01H: BOOST_SET1
    3. 7.3  Register 02H: BOOST_SET2
    4. 7.4  Register 03H: BOOST_SET3
    5. 7.5  Register 04H: CHGR_SET1
    6. 7.6  Register 05H: CHGR_SET2
    7. 7.7  Register 06H: CHGR_SET3
    8. 7.8  Register 07H: CHGR_SET4
    9. 7.9  Register 08H: CHGR_STATUS
    10. 7.10 Register 09H: SOH_SET1
    11. 7.11 Register 0AH: SOH_SET2
    12. 7.12 Register 0BH: CONTROL_STATUS
    13. 7.13 Register 0CH: FAULT_CONDITION
    14. 7.14 Register 0DH: STATUS_PIN_SET
    15. 7.15 Register 0EH: SW_RST
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Selecting the External MOSFET
        2. 8.2.2.2 Inductor Selection
        3. 8.2.2.3 Capacitor in Back-Up Battery Side
        4. 8.2.2.4 Selecting the Output Capacitor
        5. 8.2.2.5 Loop Stability and Compensation Design
          1. 8.2.2.5.1 Small Signal Analysis
          2. 8.2.2.5.2 Loop Compensation Design
      3. 8.2.3 Application Curves
    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 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.2.3 Application Curves

TPS61381-Q1 Boost Switching at Heavy Load
VBUB = 3.6V VOUT = 6.2V IOUT = 4A
Figure 8-5 Boost Switching at Heavy Load
TPS61381-Q1 Load Transient at Boost Mode
VBUB = 3.6V VOUT = 6.2V IOUT = 10mA to 4A
Figure 8-7 Load Transient at Boost Mode
TPS61381-Q1 Line Transient at Boost Mode
VBUB = 2.5V to 4V VOUT = 6.2V IOUT = 2A
Figure 8-9 Line Transient at Boost Mode
TPS61381-Q1 Boost Output Short Protection
VBUB = 3.6V VOUT = 6.2V
Figure 8-11 Boost Output Short Protection
TPS61381-Q1 Boost Output Short Recovery
VBUB = 3.6V VOUT = 6.2V
Figure 8-13 Boost Output Short Recovery
TPS61381-Q1 Transition into Boost Mode (12V Battery Interruption)
VBUB = 3.6V VOUT = 6.2V VBAT = 12V-0V IOUT = 4A
Figure 8-15 Transition into Boost Mode (12V Battery Interruption)
TPS61381-Q1 Charger Start up
VBAT = 12V VBUB = 3.6V ICC = 100mA
Figure 8-17 Charger Start up
TPS61381-Q1 NiMH Intermittent Charge
VBAT = 12V VBUB = 3.6V ICC = 100mA
Figure 8-19 NiMH Intermittent Charge
TPS61381-Q1 12V Battery Load Dump
VBAT = 12V to 40V VBUB = 3.6V IOUT = 0A
Figure 8-21 12V Battery Load Dump
TPS61381-Q1 Boost Switching at Light Load
VBUB = 3.6V VOUT = 6.2V IOUT = 100mA
Figure 8-6 Boost Switching at Light Load
TPS61381-Q1 Load Sweep at Boost Mode
VBUB = 3.6V VOUT = 6.2V IOUT = 10mA to 4A
Figure 8-8 Load Sweep at Boost Mode
TPS61381-Q1 Line Sweep at Boost Mode
VBUB = 2.5V to 4V VOUT = 6.2V IOUT = 2A
Figure 8-10 Line Sweep at Boost Mode
TPS61381-Q1 Boost Output Short Hiccup
VBUB = 3.6V VOUT = 6.2V
Figure 8-12 Boost Output Short Hiccup
TPS61381-Q1 BUB Loop
VBUB = 4V RBUB = 1Ω IOUT = 0A to 500mA
Figure 8-14 BUB Loop
TPS61381-Q1 Transition into Standby Mode (12V Battery Recovery)
VBUB = 3.6V VOUT = 6.2V VBAT = 0V-12V IOUT = 4A
Figure 8-16 Transition into Standby Mode (12V Battery Recovery)
TPS61381-Q1 Charger Steady State
VBAT = 12V VBUB = 3.6V ICC = 100mA
Figure 8-18 Charger Steady State
TPS61381-Q1 SOH Steady State
VBUB = 3.6V IDischarge = 500mA AVI = BUB/2
Figure 8-20 SOH Steady State
TPS61381-Q1 12V Battery Cold Crank
VBUB = 3.6V VOUT = 6.2V IOUT = 2A
Figure 8-22 12V Battery Cold Crank