SLUS909B May   2009  – August 2014 TPS53126

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematics
  5. 5 Revision History
  6. 6 Pin Configurations 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 Switching Characteristics
    8. 7.8 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  PWM Operation
      2. 8.3.2  Drivers
      3. 8.3.3  PWM Frequency And Adaptive On-time Control
      4. 8.3.4  5 Volt Regulator
      5. 8.3.5  Soft Start
      6. 8.3.6  Pre-Bias Support
      7. 8.3.7  Switching Frequency Selection
      8. 8.3.8  Output Discharge Control
      9. 8.3.9  Overcurrent Limit
      10. 8.3.10 Over/under Voltage Protection
      11. 8.3.11 UVLO Protection
      12. 8.3.12 Thermal Shutdown
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 350 kHz Operation Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Choose Inductor
        2. 9.2.2.2 Choose Output Capacitor
        3. 9.2.2.3 Choose Input Capacitor
        4. 9.2.2.4 Choose Bootstrap Capacitor
        5. 9.2.2.5 Choose VREG5 and V5FILT Capacitors
        6. 9.2.2.6 Choose Output Voltage Set Point Resistors
        7. 9.2.2.7 Choose Over Current Limit Set Point Resistors
      3. 9.2.3 350 kHz Application Curves
    3. 9.3 700 Khz Operation Application
      1. 9.3.1 Design Parameters
      2. 9.3.2 Detailed Design Procedure
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RGE|24
  • PW|24
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • D-CAP2™ Mode Control
    • Fast Transient Response
    • No External Parts Required For Loop Compensation
    • Compatible with Ceramic Output Capacitors
  • High Initial Reference Accuracy (±1%)
  • Low Output Ripple
  • Wide Input Voltage Range: 4.5 V to 24 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Low-Side RDS(on) Loss-Less Current Sensing
  • Adaptive Gate Drivers with Integrated Boost Diode
  • Internal 1.2 ms Voltage-Servo Soft Start
  • Pre-Biased Soft Start
  • Selectable Switching Frequency: 350 kHz / 700 kHz
  • Cycle-by-Cycle Over-Current Limiting Control
  • 30 mV to 300 mV OCP Threshold Voltage
  • Thermally Compensated OCP by 4000 ppm/C° at ITRIP

2 Applications

  • Point-of-Load Regulation in Low Power Systems for Wide Range of Applications
    • Digital TV Power Supply
    • Networking Home Terminal
    • Digital Set Top Box (STB)
    • DVD Player/Recorder
    • Gaming Consoles and Other

3 Description

The TPS53126 is a dual, adaptive on-time, D-CAP2™ mode synchronous Buck controller. The TPS53126 enables system designers to complete the suite of various end equipment's power bus regulators with a cost effective, low external component count, and low standby current solution. The main control loop for the TPS53126 uses the D-CAP2™ mode control which provides a very fast transient response with no external components. The TPS53126 also has a proprietary circuit that enables the device to adapt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device provides convenient and efficient operation with input voltages from 4.5 V to 24 V and output voltages from 0.76 V to 5.5 V.

The TPS53126 is available in 4mm x 4mm 24 pin VQFN (RGE) or 24 pin TSSOP (PW) packages and is specified from –40°C to 85°C ambient temperature range.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS53126 VQFN (24) 4.00 mm x 4.00 mm
TPS53126 TSSOP (24) 7.80 mm x 4.40 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Simplified Schematics

qfn_app_dia_lus909.gif
tssop_app_dia_lus909.gif