SLUSAK2D August   2011  – April 2021 TPS53353

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 (1)
    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 5-V LDO and VREG Start-Up
      2. 7.3.2 Adaptive On-Time D-CAP™ Control and Frequency Selection
      3. 7.3.3 Ramp Signal
      4. 7.3.4 Adaptive Zero Crossing
      5. 7.3.5 Power-Good
      6. 7.3.6 Current Sense, Overcurrent and Short Circuit Protection
      7. 7.3.7 Overvoltage and Undervoltage Protection
      8. 7.3.8 UVLO Protection
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Small Signal Model
      2. 7.4.2 Enable, Soft Start, and Mode Selection
      3. 7.4.3 Auto-Skip Eco-mode™ Light Load Operation
      4. 7.4.4 Forced Continuous Conduction Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Application Circuit Diagram
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 External Component Selection
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Typical Application Circuit Diagram With Ceramic Output Capacitors
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 External Component Selection
          2. 8.2.2.2.2 External Component Selection Using All Ceramic Output Capacitors
        3. 8.2.2.3 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. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary

8.2.2.1 Design Requirements

Table 8-2 Design Parameters
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT CHARACTERISTICS
VIN Voltage range 8 12 14 V
IMAX Maximum Input current VIN = 8 V, IOUT = 20 A 4.1 A
No load input current VIN = 14 V, IOUT = 0 A with auto-skip mode 1 mA
OUTPUT CHARACTERISTICS
VOUT Output voltage 1.5 V
Output voltage regulation Line regulation, 8 V ≤ VIN ≤ 15 V 0.1%
Load regulation, VIN = 12 V, 0 A ≤ IOUT ≤ 20 A with FCCM 0.2%
VRIPPLE Output voltage ripple VIN = 12 V, IOUT = 20 A with FCCM 20 mVPP
ILOAD Output load current 0 20 A
IOCP Output overcurrent threshold 26 A
tSS Soft-start time 1.4 ms
SYSTEMS CHARACTERISTICS
fSW Switching frequency 500 kHz
η Peak efficiency VIN = 12 V, VOUT = 1.1 V, IOUT = 10 A 91.87%
Full load efficiency VIN = 12 V, VOUT = 1.1 V, IOUT = 20 A 91.38%
TA Operating temperature 25 °C