SLVSH99 December   2023 TPS22996

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 Switching Characteristics (TPS22996, TPS22996N)
    7. 6.7 Typical Characteristics: DC
    8. 6.8 Typical Characteristics: AC
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 ON and OFF Control
      2. 8.3.2 Input Capacitor (Optional)
      3. 8.3.3 Output Capacitor (Optional)
      4. 8.3.4 Quick Output Discharge (QOD)
      5. 8.3.5 Thermal Shutdown
      6. 8.3.6 Adjustable Rise Time
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
      3. 9.4.3 Power Dissipation
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DRL|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.6 Adjustable Rise Time

TPS22996 integrates a unique architecture for adjusting the rise time. The device senses the current flowing into the ON1 and ON2 (ION) pins and utilizes the information to set the rise time. This allows the user to adjust the rise time by connecting a series resistance that is determined by the ON Pin voltage. Refer to Table 8-1 and Table 8-2 for reference on setting the resistor.

Table 8-1 Typical Rise Time (VBIAS = 5.0 V, RL = 10 Ω, CL = 0.1 μF)
ION VIN = 0.6 V VIN = 1.8 V VIN = 2.5 V VIN = 3.3 V VIN = 5.0 V
20 μA 810 μs 1434 μs 1760 μs 1986 μs 2580 μs
100 μA 215 μs 364 μs 445 μs 519 μs 688 μs
250 μA 90 μs 151 μs 185 μs 220 μs 291 μs
Table 8-2 Typical Rise Time (VBIAS = 3.3 V, RL = 10 Ω, CL = 0.1 μF)
ION VIN = 0.6 V VIN = 1.8 V VIN = 2.5 V VIN = 3.3 V
20 μA 781 μs 1489 μs 1821 μs 2154 μs
100 μA 200 μs 374 μs 451 μs 536 μs
250 μA 93 μs 175 μs 207 μs 244 μs

The following equation can be used to estimate the series resistance required to meet the desired rise time.

Equation 1. RT = 1000 × (VON − 1.2 V) / ION − Ri

where:

  • RT = Series resistance in kΩ.
  • Ri = Internal On Pin resistance in kΩ.
  • VON = ON pin voltage in V.
  • ION = Current flowing into the ON pin in μA.
GUID-20230530-SS0I-BZBL-VF9H-MRXQJQPBPMWR-low.svg Figure 8-1 TPS22996 Adjustable Rise Time Configuration