SLVS892F December   2008  – April 2019 TPS61175

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Switching Frequency
      2. 7.3.2 Soft Start
      3. 7.3.3 Overcurrent Protection
      4. 7.3.4 Enable and Thermal Shutdown
      5. 7.3.5 Undervoltage Lockout (UVLO)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Minimum ON Time and Pulse Skipping
  8. 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  Custom Design with WEBENCH Tools
        2. 8.2.2.2  Determining the Duty Cycle
        3. 8.2.2.3  Selecting the Inductor
        4. 8.2.2.4  Computing the Maximum Output Current
        5. 8.2.2.5  Setting Output Voltage
        6. 8.2.2.6  Setting the Switching Frequency
        7. 8.2.2.7  Setting the Soft-Start Time
        8. 8.2.2.8  Selecting the Schottky Diode
        9. 8.2.2.9  Selecting the Input and Output Capacitors
        10. 8.2.2.10 Compensating the Small Signal Control Loop
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Development Support
      1. 11.2.1 Custom Design with WEBENCH Tools
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.6 Typical Characteristics

Circuit of Figure 1; L1 = D104C2-10μH; D1 = SS3P6L-E3/86A, R4 = 80kΩ, R3 = 10kΩ, C4 = 22nF,
C2 = 10μF;VIN = 5V, VOUT = 24V, IOUT = 200mA (unless otherwise noted)

Table 1. Table Of Graphs

FIGURE
Efficiency VIN = 5 V, VOUT = 12 V, 24 V, 35 V Figure 1
Efficiency VIN = 5 V, 12 V; VOUT = 24 V Figure 2
Error amplifier transconductance vs Temperature Figure 3
Switch current limit vs Temperature Figure 4
Switch current limit vs Duty cycle Figure 5
FB accuracy vs Temperature Figure 6
Line transient response VIN = 4.5 V to 5 V Figure 12
Load transient response IOUT = 100 mA to 300 mA; refer to 'compensating the control loop' for optimization Figure 13
PWM Operation Figure 14
Pulse skipping No load Figure 15
Start-up C3 = 47 nF Figure 16
TPS61175 eff_io_lvs892.gif
Figure 1. Efficiency vs Output Current
TPS61175 v_ta_lvs892.gif
Figure 3. Error Amplifier Transconductance vs Free-Air Temperature
TPS61175 cur2_ta_lvs892.gif
Figure 5. Overcurrent Limit vs Free-Air Temperature
TPS61175 eff2_io_lvs892.gif
Figure 2. Efficiency vs Output Current
TPS61175 cur_dcycle_lvs892.gif
Figure 4. Overcurrent Limit vs Duty Cycle
TPS61175 v_ta_2_lvs892.gif
Figure 6. FB Voltage vs Free-Air Temperature