SLVS581B September   2006  – June 2015 TL5209

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Typical Application Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Enable and Shutdown
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Low-Voltage Operation
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Setting the Output Voltage
        2. 9.2.2.2 Input Capacitor
        3. 9.2.2.3 Output Capacitor
        4. 9.2.2.4 Bypass Capacitor
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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订购信息

8 Detailed Description

8.1 Overview

The TL5209 device is a low-dropout (LDO) regulator with an input voltage range from 2.5 V to 16 V and a maximum output current of 500 mA. The output voltage can be adjusted using external resistors (R1 and R2) and has an accuracy of 1% to 2% depending on the ambient temperature. The maximum voltage drop across the device varies from 10 mV to 500 mV depending on the current load at the output.

8.2 Functional Block Diagram

TL5209 fbd_ln_adj_lvs581.gifFigure 39. Low-Noise Adjustable Regulator

8.3 Feature Description

8.3.1 Enable and Shutdown

The EN pin is CMOS-logic compatible. When EN is held high (>2 V), the regulator is active. Likewise, applying a low signal (<0.4 V at 25°C) to EN or leaving it open shuts down the regulator. If the enable or shutdown feature is not needed, EN should be tied to VIN.

8.4 Device Functional Modes

The table below lists the expected value of VOUT as determined by the EN pin.

Table 1. VOUT Function Table

EN (Control Input) VOUT
L Open
H 1.242 V × (1 + R2/R1)