SLVSE63B September   2017  – February 2019 TPS61085A-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Simplified Schematic
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  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 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Soft Start
      2. 7.3.2 Frequency Select Pin (FREQ)
      3. 7.3.3 Undervoltage Lockout (UVLO)
      4. 7.3.4 Thermal Shutdown
      5. 7.3.5 Overvoltage Prevention
    4. 7.4 Device Functional Modes
  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 Inductor Selection
        2. 8.2.2.2 Rectifier Diode Selection
        3. 8.2.2.3 Setting the Output Voltage
        4. 8.2.2.4 Compensation (COMP)
        5. 8.2.2.5 Input Capacitor Selection
        6. 8.2.2.6 Output Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

Typical Characteristics

The typical characteristics are measured with the 3.3-µH inductor for high-frequency (part number-7447789003) or 6.8-µH inductor for low frequency (part number-B82464G4) and the rectifier diode with part number SL22.

Table 1. Table of Graphs

FIGURE
IOUT(max) Maximum load current vs Input voltage at high frequency (1.2 MHz) Figure 1
vs Input voltage at low frequency (650 kHz) Figure 2
η Efficiency vs Load current, VS = 12 V, VIN = 3.3 V Figure 3
vs Load current, VS = 9 V, VIN = 3.3 V Figure 4
Supply current vs Supply voltage Figure 5
Frequency vs Load current Figure 6
vs Supply voltage Figure 7
TPS61085A-Q1 61085HFmaxI.pngFigure 1. Maximum Load Current vs Input Voltage
TPS61085A-Q1 eff_io_lvs859.gifFigure 3. Efficiency vs Load Current, VS = 12 V, VIN = 3.3 V
TPS61085A-Q1 61085LFmaxI.pngFigure 2. Maximum Load Current vs Input Voltage
TPS61085A-Q1 eff2_io_lvs859.gifFigure 4. Efficiency vs Load Current, VS = 9 V, VIN = 3.3 V
TPS61085A-Q1 icc_vcc_lvs859_v2.gifFigure 5. Supply Current vs Supply Voltage
TPS61085A-Q1 f_vi_lvs859.gifFigure 7. Frequency vs Supply Voltage
TPS61085A-Q1 f_io_lvs859_v2.gifFigure 6. Frequency vs Load Current