SLVSEG1A July   2018  – September 2019 TPS56637

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
      2.      Efficiency vs Output Current VOUT = 5 V
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  The Adaptive On-Time Control and PWM Operation
      2. 7.3.2  Mode Selection
        1. 7.3.2.1 Eco-mode™ Control Scheme
        2. 7.3.2.2 FCCM Control
      3. 7.3.3  Soft Start and Pre-Biased Soft Start
      4. 7.3.4  Enable and Adjusting Undervoltage Lockout
      5. 7.3.5  Output Overcurrent Limit and Undervoltage Protection
      6. 7.3.6  Overvoltage Protection
      7. 7.3.7  UVLO Protection
      8. 7.3.8  Thermal Shutdown
      9. 7.3.9  Output Voltage Discharge
      10. 7.3.10 Power Good
    4. 7.4 Device Functional Modes
      1. 7.4.1 Standby Operation
      2. 7.4.2 Normal Operation
      3. 7.4.3 Light Load Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Output Voltage Resistors Selection
        2. 8.2.2.2 Output Filter Selection
        3. 8.2.2.3 Input Capacitor Selection
        4. 8.2.2.4 Bootstrap Capacitor Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Package Option Addendum
      1. 12.1.1 Packaging Information
      2. 12.1.2 Tape and Reel Information

5 Pin Configuration and Functions

RPA Package
10-Pin VQFN-HR
Top View
TPS56637 pinout2-slvseg1-spin.gif

Pin Functions

PIN TYPE DESCRIPTION
NAME NO.
AGND 3 G Ground of internal analog circuitry. Connect AGND to PGND plane at a single point.
BOOT 7 I Supply input for the gate drive voltage of the high-side MOSFET. Connect a 0.1-µF bootstrap capacitor between BOOT and SW.
EN 1 I Enable input control. Driving EN high or leaving this pin floating enables the converter. A resistor divider can be used to imply an UVLO function.
FB 2 I Output feedback. Connect FB to the tap of an external resistor divider from the output to GND to set the output voltage.
MODE 10 I Operation mode selection pin. Leaving this pin floating(≥500 kΩ) forces the TPS56637 into FCCM. Connecting this pin to GND(≤10 kΩ) forces the TPS56637 into Eco-mode™ under light load.
NC 5 N Not Connected, keep this pin floating.
PG 4 O Open Drain Power Good Indicator, it is asserted low if output voltage is out of PG threshold due to over-voltage, under-voltage, thermal shutdown, EN shutdown or during soft-start.
PGND 9 G Power GND terminal. Source terminal of low side MOSFET.
SW 6 O Switching node terminal. Connect the output inductor to this pin with wide and short tracks
VIN 8 P Input voltage supply pin. Drain terminal of high-side MOSFET. Connect the input decoupling capacitors between VIN and GND.