SLVSAX2B September   2011  – June 2020 TPS61170-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
  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 Switching Characteristics
    7. 6.7 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 Soft Start-up
      2. 7.3.2 Overcurrent Protection
      3. 7.3.3 Undervoltage Lockout
      4. 7.3.4 Thermal Shutdown
      5. 7.3.5 Enable and Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 PWM Program Mode
      2. 7.4.2 1-Wire Program Mode
      3. 7.4.3 EasyScale
    5. 7.5 Programming
      1. 7.5.1 Feedback Reference Program Mode Selection
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 12-V to 24-V DC-DC Power Conversion
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Program Output Voltage
          2. 8.2.1.2.2 Maximum Output Current
          3. 8.2.1.2.3 Switch Duty Cycle
          4. 8.2.1.2.4 Inductor Selection
          5. 8.2.1.2.5 Schottky Diode Selection
          6. 8.2.1.2.6 Compensation Capacitor Selection
          7. 8.2.1.2.7 Input and Output Capacitor Selection
        3. 8.2.1.3 Application Curve
      2. 8.2.2 5-V to 12-V DC-DC Power Conversion With Programmable Feedback Reference Voltage
      3. 8.2.3 12-V SEPIC (Buck-Boost) Converter
  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 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

6.6 Switching Characteristics

VIN = 3.6 V, CTRL = VIN, TA = –40°C to 125°C, typical values are at TA = 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ENABLE AND REFERENCE CONTROL
toff EasyScale detection time(1) CTRL high to low 2.5 ms
tes_det EasyScale detection time(1) CTRL pin low 260 μs
tes_delay EasyScale detection delay 100 μs
tes_win EasyScale detection window time 1 ms
VOLTAGE AND CURRENT CONTROL
fS Oscillator frequency 1 1.2 1.5 MHz
tmin_on Minimum on pulse width 40 ns
fea Error amplifier crossover frequency 5 pF connected to COMP 500 kHz
OC AND SS
tHalf_LIM Time step for half current limit 5 ms
tREF Vref filter time constant 180 μs
tstep VREF ramp-up time 213 μs
EasyScale TIMING
tstart Start time of program stream 2 μs
tEOS End time of program stream 2 360 μs
tH_LB High time low bit Logic 0 2 180 μs
tL_LB Low time low bit Logic 0 2 × tH_LB 360 μs
tH_HB High time high bit Logic 1 2 × tL_HB 360 μs
tL_HB Low time high bit Logic 1 2 180 μs
tvalACKN Acknowledge valid time See (1) 2 μs
tACKN Duration of acknowledge condition See (1) 512 μs
(1) EasyScale communication is allowed immediately after the CTRL pin has been low for more than tes_det. To select EasyScale mode, the CTRL pin must be low for more than tes_det the end of tes_win.