SLVSI74A July   2025  – November 2025 TLV61290

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 System Characteristics
    7. 6.7 I2C Interface Timing Characteristics
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Voltage Setting
      2. 7.3.2 Switching frequency and Spread Spectrum Function
    4. 7.4 Device Functional Modes
      1. 7.4.1  Enable and Start-up
      2. 7.4.2  Operation Mode Setting
      3. 7.4.3  Bypass Mode
      4. 7.4.4  Boost Control Operation
      5. 7.4.5  Auto PFM Mode
      6. 7.4.6  Forced PWM Mode
      7. 7.4.7  Ultrasonic Mode
      8. 7.4.8  Output Discharge
      9. 7.4.9  Undervoltage Lockout
      10. 7.4.10 Current Limit Operation
      11. 7.4.11 Output Short-to-Ground Protection
      12. 7.4.12 Thermal Shutdown
      13. 7.4.13 Power-Good Indication Status
    5. 7.5 Programming
      1. 7.5.1 Data Validity
      2. 7.5.2 START and STOP Conditions
      3. 7.5.3 Byte Format
      4. 7.5.4 Acknowledge (ACK) and Not Acknowledge (NACK)
      5. 7.5.5 Target Address and Data Direction Bit
      6. 7.5.6 Single Read and Write
      7. 7.5.7 Multi-Read and Multi-Write
    6. 7.6 Register Maps
      1. 7.6.1 DeviceID Register
      2. 7.6.2 CONFIG Register
      3. 7.6.3 VOUTFLOORSET Register
      4. 7.6.4 ILIMBSTSET Register
      5. 7.6.5 VOUTROOFSET Register
      6. 7.6.6 STATUS Register
      7. 7.6.7 ILIMPTSET Register
      8. 7.6.8 BSTLOOP Register
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 TLV61290 with 2.5V-4.35V VIN, 3.4V VOUT, 4A Output Current
        1. 8.2.1.1 Design Requirement
        2. 8.2.1.2 Detailed Design Parameters
          1. 8.2.1.2.1 Inductor Selection
          2. 8.2.1.2.2 Output Capacitor
          3. 8.2.1.2.3 Input Capacitor
          4. 8.2.1.2.4 Checking Loop Stability
        3. 8.2.1.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
      3. 8.4.3 Thermal Information
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1.     79
8.2.1.2.1 Inductor Selection

A boost converter normally requires two main passive components for storing energy during the conversion, an inductor and an output capacitor are required. It is advisable to select an inductor with a saturation current rating higher than the possible peak current flowing through the power switches.

The inductor peak current varies as a function of the load, the input and output voltages and is estimated using Equation 7.

Equation 7. IL(PEAK)=VIN×D2×f×L+IOUT1-D×η  with  D=1-VINVOUT

Selecting an inductor with insufficient saturation performance leads to excessive peak current in the converter. This current could eventually harm the device and reduce the reliability of the device.

When selecting the inductor, as well as the inductance, parameters of importance are: maximum current rating, series resistance, and operating temperature. Enable the inductor DC current rating to be greater than the maximum input average current, refer to the Section 7.4.10 section for more details.

Equation 8. ILDC=VOUTVIN×1η×IOUT

The TLV61290 series of step-up converters have been optimized to operate with a effective inductance in the range of 330nH to 560nH. Larger or smaller inductor values are used to optimize the performance of the device for specific operating conditions. For more details, see the Section 8.2.1.2.4 section.

The total losses of the coil consist of both the losses in the DC resistance, R(DC) , and the following frequency-dependent components:

  • The losses in the core material (magnetic hysteresis loss, especially at high switching frequencies)
  • Additional losses in the conductor from the skin effect (current displacement at high frequencies)
  • Magnetic field losses of the neighboring windings (proximity effect)
  • Radiation losses

For good efficiency, enable the inductor DC resistance to be less than 30mΩ. The following inductor series from different suppliers have recommended with the TLV61290 converters.

Table 8-2 List of Inductors

SERIES

L (nH)DIMENSIONS (in mm)DC INPUT CURRENT LIMIT SETTING

MANUFACTURER(1)

HTTO32251T-R47MMR

470

3.2 x 2.5 x 1.0 max. height≤8600mA

Cyntec

744383340047

470

3.4 x 3.4 x 1.2 max. height≤9400mA

Wurth Elektronik

XGL4012-451

450

4.0 x 4.0 x 1.2 max. height≤9900mA

Coilcraft

DFE32CAHR47MR0

470

3.2 x 2.5 x 2.0 max. height≤8700mA

Murata