SNVSA40B October   2014  – June 2024 TPS61169

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Soft Start-Up
      2. 6.3.2 Open LED Protection
      3. 6.3.3 Shutdown
      4. 6.3.4 Current Program
      5. 6.3.5 LED Brightness Dimming
      6. 6.3.6 Undervoltage Lockout
      7. 6.3.7 Thermal Foldback and Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Operation With CTRL
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Inductor Selection
        2. 7.2.2.2 Schottky Diode Selection
        3. 7.2.2.3 Output Capacitor Selection
        4. 7.2.2.4 LED Current Set Resistor
        5. 7.2.2.5 Thermal Considerations
    3. 7.3 Application Curves
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

5.5 Electrical Characteristics

Over operating free-air temperature range, VIN = 3.6V, CTRL = VIN (unless otherwise specified).
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
POWER SUPPLY
VINInput voltage range2.75.5V
VVIN_UVLOUndervoltage lockout thresholdVIN falling
VIN rising		22.3
2.6		V
VVIN_HYSVIN UVLO hysteresis200mV
IQ_VINOperating quiescent current into VINDevice enable, switching 1.2MHz and no load,
0.30.45mA
ISDShutdown currentCTRL = GND12µA
CONTROL LOGIC AND TIMING
VHCTRL Logic high voltage1.2V
VLCTRL Logic Low voltage0.4V
RPDCTRL pin internal pull-down resistor300KΩ
tSDCTRL logic low time to shutdownCTRL high to low2.5ms
VOLTAGE AND CURRENT REGULATION
VREFVoltage feedback regulation voltageDuty = 100%, TA ≥ 25°C188204220mV
IFBFB pin bias currentVFB = 204mV2.5µA
tREFVREF filter time constant1ms
POWER SWITCH
RDS(ON)N-channel MOSFET on-resistance0.350.7Ω
ILN_NFETN-channel leakage currentVSW = 35V 1µA
SWITCHING FREQUENCY
ƒSWSwitching frequencyVIN = 3V0.751.21.5MHz
PROTECTION AND SOFT START
ILIMSwitching MOSFET current limitD = DMAX , TA ≤ 85°C1.21.82.4A
ILIM_StartSwitching MOSFET start-up current limitTA ≤ 85°C0.72A
tHalf_LIMTime step for half current limit6.5ms
VOVP_SWOutput voltage overvoltage threshold3637.539V
THERMAL SHUTDOWN
TshutdownThermal shutdown threshold160°C
ThysThermal shutdown hysteresis15°C