SNVSCV5 October   2025 TPS923621 , TPS923622

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 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 Enable and Start-up
      2. 7.3.2 Under-Voltage Lockout (UVLO)
      3. 7.3.3 Shutdown
      4. 7.3.4 Boost Control Operation
      5. 7.3.5 Switching Peak Current Limit
      6. 7.3.6 Over-Voltage Protection
      7. 7.3.7 Output Current Setting
      8. 7.3.8 Output Current PWM Controlled Analog Dimming
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation Mode
      2. 7.4.2 Over-Voltage Protection Mode
      3. 7.4.3 Shutdown Mode
  9. 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 Schottky Diode Selection
        3. 8.2.2.3 Output Capacitor Selection
        4. 8.2.2.4 LED Current Set Resistor
        5. 8.2.2.5 Thermal Considerations
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
    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

6.5 Electrical Characteristics

TJ = –40 to 125°C, VIN = 3.6 V. Typical values are at TJ = 25°C, (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
POWER SUPPLY
VIN Input voltage range 2.5 5.5 V
VIN_UVLO VIN under voltage lockout threshold VIN  rising 2.3 2.49 V
VIN  falling 2.05 2.17 V
IQ Quiescent current into VIN pin Chip enable. No switching. 260 300 µA
ISD Shutdown current into VIN pin ADIM = 0 (IC disabled), TJ = 25 °C 0.13 0.25 µA
ADIM = 0 (IC disabled), TJ up to 85°C 0.13 0.5 µA
CONTROL LOGIC
VADIM_H ADIM Logic high threshold TJ up to 85°C 0.855 V
VADIM_L ADIM Logic low threshold TJ up to 85°C 0.385 V
RADIM_PD ADIM pin internal pull down resistor 600 kΩ
tADIM_EN(1) ADIM first pulse high time to enable device 40 us
tADIM_SD(1) ADIM logic low time to shutdown 2.5 ms
tADIM_PWM(1) ADIM minimum PWM on time for dimming 20 ns
VOLTAGE REFERENCE
VFB PWM duty cycle 100% (TPS923621) 195 200.5 206 mV
TJ = 25°C 198 200.5 203 mV
PWM duty cycle 10% (TPS923621) 14.5 20.2 25.5 mV
TJ = 25°C 18 20.2 22 mV
PWM duty cycle 1% (TPS923621) TJ = 25°C 1.7 2.2 2.7 mV
PWM duty cycle 0.1% (TPS923621)(1) TJ = 25°C 0.35 mV
PWM duty cycle 100% (TPS923622) 198 203 207 mV
TJ = 25°C 201 203 206 mV
PWM duty cycle 10% (TPS923622) 16 20.6 26 mV
TJ = 25°C 18.6 20.6 22.6 mV
PWM duty cycle 1% (TPS923622) TJ = 25°C 1.75 2.25 2.75 mV
PWM duty cycle 0.1% (TPS923622)(1) TJ = 25°C 0.35 mV
IFB FB pin bias current VFB=200mV 0.1 uA
SWITCH CONVERTER
RDSON_LS Low-side switch FET on resistance (TPS923621) 280 400 mΩ
TJ = 25°C 280 300 mΩ
Low-side switch FET on resistance (TPS923622) 300 420 mΩ
TJ = 25°C 300 320 mΩ
RDSON_HS High-side switch FET on resistance (TPS923621) 600 900 mΩ
TJ = 25°C 600 680 mΩ
High-side switch FET on resistance (TPS923622) 625 925 mΩ
TJ = 25°C 625 705 mΩ
FSW(1) Switching frequency (TPS923621DRLR, TPS923622DRVR) 1.1 MHz
VOVP_R VOUT over-voltage rising threshold (TPS923621, TPS923622) 29.6 30.5 31.4 V
VOVP_HYS VOUT over-voltage falling threshold 1 V
CURRENT LIMIT
ILIM FET switching peak current limit (TPS923621) 1.6 1.8 2.1 A
FET switching peak current limit (TPS923622) 1.95 2.25 2.6 A
ILIM_START(1) FET switching start-up peak current 0.8 A
THERMAL SHUTDOWN
TTSD_R(1) Thermal shutdown rising threshold TJ rising 170 °C
TTSD_F(1) Thermal shutdown falling threshold TJ falling 150 °C
(1) Not production tested. Guaranteed by simulation and bench test.