SLVSDU7 January   2017 TPS568215OA

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD 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  PWM Operation and D-CAP3 Control
      2. 7.3.2  Out-of-Audio Operation
      3. 7.3.3  4.7 V LDO and External Bias
      4. 7.3.4  MODE Selection
      5. 7.3.5  Soft Start and Pre-biased Soft Start
      6. 7.3.6  Enable and Adjustable UVLO
      7. 7.3.7  Power Good
      8. 7.3.8  Over Current Protection and Under Voltage Protection
      9. 7.3.9  Out-of-Bounds Operation
      10. 7.3.10 UVLO Protection
      11. 7.3.11 Thermal Shutdown
      12. 7.3.12 Output Voltage Discharge
    4. 7.4 Device Functional Modes
      1. 7.4.1 Light Load Operation
      2. 7.4.2 Standby 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 External Component Selection
          1. 8.2.2.1.1 Output Voltage Set Point
          2. 8.2.2.1.2 Switching Frequency and Mode Selection
          3. 8.2.2.1.3 Inductor Selection
          4. 8.2.2.1.4 Output Capacitor Selection
          5. 8.2.2.1.5 Input 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 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
    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

Package Options

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

5 Pin Configuration and Functions

RNN Package
18-Pin VQFN
TPS568215OA Pinout_RNN18_SLVSD05.gif

Pin Functions

PIN I/O DESCRIPTION
NO. NAME
1 BOOT I Supply input for the gate drive voltage of the high-side MOSFET. Connect a 0.1-µF bootstrap capacitor between BOOT and SW.
2,11 VIN P Input voltage supply pin for the control circuitry. Connect the input decoupling capacitors between VIN and PGND.
3, 4, 5,
8, 9, 10		 PGND G Power GND terminal for the controller circuit and the internal circuitry.
6, 7 SW O Switch node terminal. Connect the output inductor to this pin.
12 AGND G Ground of internal analog circuitry. Connect AGND to PGND plane.
13 FB I Converter feedback input. Connect to the resistor divider between output voltage and AGND.
14 SS O

Soft-Start time selection pin. Connecting an external capacitor sets the soft-start time and if no external capacitor is connected, the soft-start time in 1ms.
15 EN I Enable input control, leaving this pin floating enables the converter. It can also be used to adjust the input UVLO by connecting to the resistor divider between VIN and EN.
16 PGOOD O Open Drain Power Good Indicator, it is asserted low if output voltage is out of PGOOD threshold, Overvoltage or if the device is under thermal shutdown, EN shutdown or during soft start.
17 VREG5 I/O 4.7-V internal LDO output which can also be driven externally with a 5V input. This pin supplies voltage to the internal circuitry and gate driver. Bypass this pin with a 4.7-μF capacitor.
18 MODE I Switching Frequency, Current Limit selection and Light load operation mode selection pin. Connect this pin to a resistor divider from VREG5 and AGND for different MODE options shown in table 4.