SLVSLZ3 August   2026 TLV612901

PRODMIX  

  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 I2C Interface Timing Requirements
    7. 6.7 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 Overvoltage Protection
      13. 7.4.13 Thermal Shutdown
      14. 7.4.14 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
  9. 8 Register Maps
    1. 8.1 DeviceID Register
    2. 8.2 CONFIG Register
    3. 8.3 VOUTFLOORSET Register
    4. 8.4 ILIMBSTSET Register
    5. 8.5 VOUTROOFSET Register
    6. 8.6 STATUS Register
    7. 8.7 ILIMPTSET Register
    8. 8.8 BSTLOOP Register
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 TLV612901 With 2.5V – 4.85V VIN, 5.0V VOUT, 3A Output Current
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Inductor Selection
          2. 9.2.1.2.2 Output Capacitor
          3. 9.2.1.2.3 Input Capacitor
          4. 9.2.1.2.4 Checking Loop Stability
        3. 9.2.1.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
      3. 9.4.3 Thermal Information
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1.     79
9.2.1.2.1 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. Selecting an inductor with a saturation current rating higher than the possible peak current flowing through the power switches is advisable.

The inductor peak current varies as a function of the load and the input and output voltages. Equation 7 calculates the inductor peak current.

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 can 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. See also Current Limit Operation.

Equation 8. ILDC=VOUTVIN×1η×IOUT

The TLV612901 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. See also Checking Loop Stability.

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

TI recommends the following inductor series from different suppliers with TLV612901.

Table 9-2 List of Inductors
SERIESL (nH)DIMENSIONS (in mm)DC INPUT CURRENT LIMIT SETTINGMANUFACTURER(1)
HTTO32251T-R47MMR4703.2 × 2.5 × 1.0 maximum height≤ 8600mACyntec
7443833400474703.4 × 3.4 × 1.2 maximum height≤ 9400mAWurth Elektronik
XGL4012-4514504.0 × 4.0 × 1.2 maximum height≤ 9900mACoilcraft
DFE32CAHR47MR04703.2 × 2.5 × 2.0 maximum height≤ 8700mAMurata