SLVSBK1E September   2012  – May 2014 TPS65631

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 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 Boost Converter
      2. 8.3.2 Inverting Buck-Boost Converter
        1. 8.3.2.1 Programming VNEG
        2. 8.3.2.2 Controlling the VNEG Transition Time
      3. 8.3.3 Soft-Start and Start-Up Sequence
      4. 8.3.4 Enable (CTRL)
      5. 8.3.5 Undervoltage Lockout
      6. 8.3.6 Short Circuit Protection
        1. 8.3.6.1 Short-Circuits During Normal Operation
        2. 8.3.6.2 Short-Circuits During Start-Up
      7. 8.3.7 Output Discharge During Shutdown
      8. 8.3.8 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation with VI < 2.9 V
      2. 8.4.2 Operation with VI ≈ VPOS (Diode Mode)
      3. 8.4.3 Operation with CTRL
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Inductor Selection
        2. 9.2.2.2 Capacitor Selection
        3. 9.2.2.3 Stability
      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 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

6 Pin Configuration and Functions

DPD PACKAGE
(TOP VIEW)
PinOut_01_SLVSBK1.gif
DPD PACKAGE
(BOTTOM VIEW)
PinOut_02_SLVSBK1.gif

Pin Functions

NAME NO. I/O DESCRIPTION
AGND 5 — Analog ground.
AVIN 11 — Input supply voltage for internal analog circuits (both converters).
CT 8 I/O Timing capacitor pin. Connect a capacitor between this pin and ground to control the time it takes for the output of the inverting buck-boost converter to ramp from one value of VNEG to another.
CTRL 7 I Control pin. Combined device enable and inverting buck-boost converter output voltage programming pin.
FBS 4 I Feedback sense pin of the boost converter output voltage.
GND 6 — Ground. (Note: it is possible to leave this pin floating without affecting device performance.)
PGND 2 — Power ground of the boost converter.
PVIN 12 — Input supply voltage pin for the inverting buck-boost converter.
SWN 10 O Switch pin of the inverting buck-boost converter.
SWP 1 O Switch pin of the boost converter.
OUTN 9 O Rectifier pin of the inverting buck-boost converter.
OUTP 3 O Rectifier pin of the boost converter.
Exposed Thermal Pad 13 — Connect this pad to AGND and PGND.