SLVSGM3B March   2023  – January 2024 TPS56836 , TPS56837 , TPS56838

PRODUCTION DATA  

  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
    5. 5.5 Electrical Characteristics
    6. 5.6 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  The Adaptive On-Time Control and PWM Operation
      2. 6.3.2  Mode Selection
      3. 6.3.3  Soft Start and Pre-Biased Soft Start
      4. 6.3.4  Enable and Adjusting Undervoltage Lockout
      5. 6.3.5  Output Overcurrent Limit and Undervoltage Protection
      6. 6.3.6  Overvoltage Protection
      7. 6.3.7  UVLO Protection
      8. 6.3.8  Thermal Shutdown
      9. 6.3.9  Output Voltage Discharge
      10. 6.3.10 Power Good
      11. 6.3.11 Large Duty Operation
    4. 6.4 Device Functional Modes
      1. 6.4.1 Standby Operation
      2. 6.4.2 Eco-mode
      3. 6.4.3 Forced Continuous Conduction Mode
      4. 6.4.4 Out-of-Audio™ Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Custom Design With WEBENCH® Tools
        2. 7.2.2.2 Output Voltage Resistors Selection
        3. 7.2.2.3 Output Filter Selection
        4. 7.2.2.4 Input Capacitor Selection
        5. 7.2.2.5 Bootstrap Capacitor Selection
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 Custom Design With WEBENCH® Tools
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

4 Pin Configuration and Functions

GUID-20230213-SS0I-TMNQ-F5TG-RZQBGK4W1HZV-low.svgFigure 4-1 RPA Package,10-Pin VQFN-HRTop View
Table 4-1 Pin Functions
PINTYPE(1)DESCRIPTION
NAMENO.
EN1IEnable input control. Driving EN high or leaving this pin floating enables the converter. A resistor divider between this pin, VIN and AGND can be used to implement an external UVLO.
FB 2IOutput feedback. Connect FB to the output voltage with a feedback resistor divider.
AGND3GGround of internal analog circuitry. Connect AGND to PGND plane at a single point.
PG4OOpen drain power-good indicator,this pin is asserted low if output voltage is out of PG threshold due to overvoltage, undervoltage, thermal shutdown, EN shutdown, or during soft start.
SS 5OSoft-start time selection pin. Connecting an external capacitor to AGND to set the soft-start time and if no external capacitor is connected, the soft-start time is 1.8ms by default.
SW6OSwitching node terminal. Connect the output inductor to this pin with wide and short tracks.
BOOT7ISupply input for the gate drive voltage of the high-side MOSFET. Connect a 0.1µF bootstrap capacitor between BOOT and SW.
VIN8PInput voltage supply pin. Drain terminal of high-side MOSFET. Connect the input decoupling capacitors between VIN and PGND.
PGND9GPower GND terminal. Source terminal of low-side MOSFET.
MODE10ISwitching frequency and current limit selection pin. Connect this pin with a resistor to AGND for different MODE options shown in Table 6-1.
(1) I = Input, P = Power, G = Ground, O = Output.