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

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YBG|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.2 Switching frequency and Spread Spectrum Function

The TLV61290 boost converter does not have fixed frequency and it keeps the inductor ripple current in the range of approximately 1.0A, so the frequency is changed and determined by the operation condition.

In auto PFM operation, the minimum switching frequency is not limited, the switching frequency is approximately 20Hz (or even lower) with open load.

In Ultrasonic mode, the minimum switching frequency is limited to 25kHz (min.) to avoid audio band noise. In forced PWM operation, minimum switching frequency is limited to approximately 300 kHz. With this unique feature, the TLV61290 avoids the low frequency switching and prevents the application against the low frequency noise sensitive range.

Switching regulators are particularly troublesome in applications where electromagnetic interference (EMI) is a concern. Switching regulators operate on a cycle-by-cycle basis to transfer power to an output. In most cases, the frequency of operation is either fixed or regulated, based on the output load. This method of conversion creates large components of noise at the frequency of operation (fundamental) and multiples of the operating frequency (harmonics).

The TLV61290 provides a spread spectrum feature. The goal is to spread out the emitted RF energy over a larger frequency range so that the resulting EMI is similar to white noise. The end result is a spectrum that is continuous and lower in peak amplitude, making it easier to comply with electromagnetic interference (EMI) standards and with the power supply ripple requirements in cellular and non-cellular wireless applications. Radio receivers are typically susceptible to narrowband noise that is focused on specific frequencies.

The spread spectrum architecture varies the switching frequency by ca. ±8% of the nominal switching frequency thereby significantly reducing the peak radiated and conducting noise on both the input and output supplies. The frequency dithering scheme is modulated with a triangle profile and a modulation frequency fm.

TLV61290 Spectrum of a Frequency Modulated Sin. Wave with Sinusoidal Variation in TimeFigure 7-1 Spectrum of a Frequency Modulated Sin. Wave with Sinusoidal Variation in Time
TLV61290 Spread Bands of Harmonics in Modulated Square Signals Spectrum illustrations and formulae (Figure 7-1 and Figure 7-2) copyright IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, VOL. 47, NO.3, AUGUST 2005.Figure 7-2 Spread Bands of Harmonics in Modulated Square Signals (1)

The above figures show that after modulation the sideband harmonic is attenuated compared to the non-modulated harmonic, and the harmonic energy is spread into a certain frequency band. The higher the modulation index (mf) the larger the attenuation.

Equation 1. mf=δ×fcfm

where

  • fc is the carrier frequency (switching frequency)
  • fm is the modulating frequency (approximately 0.5%*fc)
  • δ is the modulation ratio (approximately 8%)
Equation 2. δ=∆fcfc

The maximum switching frequency fc is limited by the process and finally the parameter modulation ratio (δ), together with fm, which is the side-band harmonics bandwidth around the carrier frequency fc. The bandwidth of a frequency modulated waveform is approximately given by the Carson’s rule and can be summarized as:

Equation 3. B=2×fm×1+mf=2×∆fc+fm

fm < RBW: The receiver is not able to distinguish individual side-band harmonics, so, several harmonics are added in the input filter and the measured value is higher than expected in theoretical calculations.

fm > RBW: The receiver is able to properly measure each individual side-band harmonic separately, so the measurements match with the theoretical calculations.

1. Spectrum illustrations and formulae (Figure 7-1 and Figure 7-2) copyright IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, VOL. 47, NO.3, AUGUST 2005.