SLUSAP5A December   2011  – November 2016 TPS53316

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 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 Overcurrent and Frequency Setting
      2. 7.3.2 Soft-Start Operation
      3. 7.3.3 Power Good
      4. 7.3.4 UVLO Function
      5. 7.3.5 Overcurrent Protection
      6. 7.3.6 Overvoltage Protection
      7. 7.3.7 Undervoltage Protection
      8. 7.3.8 Overtemperature Protection
      9. 7.3.9 Output Discharge
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation Mode
      2. 7.4.2 Light Load Operation
      3. 7.4.3 Forced Continuous Conduction Mode
  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 Determine the Value of R1 and R2
        2. 8.2.2.2 Choose the Inductor
        3. 8.2.2.3 Choose the Output Capacitor(s)
        4. 8.2.2.4 Choose the Input Capacitors
        5. 8.2.2.5 Compensation Design
      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 Features

  • 96% Maximum Efficiency
  • Continuous 5-A Output Current Capability
  • Support all MLCC Output Capacitor
  • SmoothPWM™ Auto-Skip Eco-Mode™ for Light-Load Efficiency
  • Voltage Mode Control
  • Single Rail Input
  • Selectable Frequency
  • Selectable OCP Threshold
  • Selectable Soft-Start Time
  • 2.9-V to 6-V Input Voltage Range
  • Adjustable Output Voltage Ranging from 0.6 V up to 0.8 × VIN
  • Soft-Stop Output Discharge During Disable
  • Overcurrent, Overvoltage, and Overtemperature Protection
  • Open-Drain Power Good Indication
  • Internal Bootstrap Switch
  • Supports Prebias Start-Up Functionality
  • Small 3 mm × 3 mm, 16-Pin, QFN Package
  • Low RDS(on), 22-mΩ With 3.3-V Input and 18-mΩ With 5-V Input

2 Applications

  • Low-Voltage Applications for 5-V Step-Down Rails
  • Low-Voltage Applications for 3.3-V Step-Down Rails

3 Description

The TPS53316 device provides a fully integrated 3.3-V or 5-V input, synchronous buck converter with 16 total components, in 200 mm2 of PCB area. Due to low RDS(on) and TI proprietary SmoothPWM skip mode of operation, it enables 96% peak efficiency, and over 90% efficiency at load as light as 100 mA. It requires only two 22-µF ceramic output capacitors for a power-dense, 5-A solution.

TPS53316 features 750-kHz, 1.1-MHz, and 2-MHz switching frequency selections, prebias start-up, selectable internal softstart, output soft discharge, internal VBST switch, power good, EN/Input UVLO, overcurrent, overvoltage, undervoltage, and overtemperature protections and all ceramic output capacitor support. It supports input voltages from
2.9 V to 6 V, and no extra bias voltage is needed. The output voltage is adjustable from 0.6 V up to
0.8 × VIN.

TPS53316 is available in the 3 mm × 3 mm, 16-pin QFN package (Green RoHs compliant and Pb free) and is specified from –40°C to 85°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS53316 QFN (16) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Circuit

TPS53316 v11233_lusap5.gif