SBOSA47A February   2026  – September 2026 OPA2591 , OPA591

PRODMIX  

  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 for OPA591
    5. 5.5 Thermal Information OPA2591
    6. 5.6 Electrical Characteristics
    7. 5.7 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 Offset Correction
      2. 6.3.2 MUX-Friendly Inputs
      3. 6.3.3 Thermal Protection
      4. 6.3.4 Advanced Slew Boost
      5. 6.3.5 Full-Power Bandwidth Improved
      6. 6.3.6 Overload Recovery
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 High Voltage Instrumentation Amplifier
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curves
      2. 7.2.2 DAC Output Gain and Buffer
      3. 7.2.3 Single-Supply Piezoelectric Driver
      4. 7.2.4 Current Booster
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Thermal Considerations
        2. 7.4.1.2 Creepage and Clearance
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

7.2.4 Current Booster

Some instances exists where designers require more output current drive from the OPAx591. Fig shows a simple current booster circuit that enables high voltage, high current drive capability. The circuit can be built with a couple of power MOSFETs or BJTs. One advantage of this circuit over monolithic power amplifiers is the significantly better thermal performance. The external transistors deliver the power and the OPAx591 is kept relatively cool to prevent any thermally related performance degradation.

OPA591 OPA2591 Current Booster Circuit Figure 7-8 Current Booster Circuit