SBOS030C August   2000  – March 2024 BUF634

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: TO-220 and TO-263 Packages
    6. 6.6 Electrical Characteristics: Wide-Bandwidth Mode for SOIC Package
    7. 6.7 Electrical Characteristics: Low-Quiescent-Current Mode for SOIC Package
    8. 6.8 Typical Characteristics: TO-220 and TO-263 Packages
    9. 6.9 Typical Characteristics: SOIC Package
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Current
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 High Frequency Applications
    2. 8.2 Typical Application
      1. 8.2.1 Boosting Op Amp Output Current
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Power Dissipation
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
        1. 9.1.1.1 TINA-TI™ Simulation Software (Free Download)
        2. 9.1.1.2 TI Reference Designs
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
  • KTT|5
  • KC|5
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.2.1.2 Detailed Design Procedure

To make sure that the composite amplifier remains stable, the phase shift of the BUF634 must remain small throughout the loop gain of the circuit. For a G = +1 op-amp circuit, the BUF634 must contribute little additional phase shift (approximately 20° or less) at the unity-gain frequency of the op amp. Phase shift is affected by various operating conditions that can affect stability of the op amp; see Section 6.8.

Most general-purpose or precision op amps remain unity-gain stable with the BUF634 connected inside the feedback loop as shown. Large capacitive loads can require the BUF634 to be connected for wide bandwidth and stable operation. High-speed or fast-settling op amps generally require the wide bandwidth mode to remain stable and to maintain good dynamic performance. To check for stability with an op amp, look for oscillations or excessive ringing on signal pulses with the intended load, and worst-case conditions that affect phase response of the buffer. Connect the circuit as shown in Figure 8-6. Choose resistors to provide a voltage gain of 23.5 V/V. Select the feedback resistor to be 2.7 kΩ. Choose the input resistor to be 120 Ω.