SLVS789D November   2007  – December 2014 TPS61170

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Typical Application Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 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 Soft Start-Up
      2. 8.3.2 Overcurrent Protection
      3. 8.3.3 Undervoltage Lockout (UVLO)
      4. 8.3.4 Thermal Shutdown
      5. 8.3.5 Enable and Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Feedback Reference Program Mode Selection
      2. 8.4.2 PWM Program Mode
      3. 8.4.3 1-Wire Program Mode
    5. 8.5 Programming
      1. 8.5.1 EasyScale
  9. 9 Application 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 Program Output Voltage
        2. 9.2.2.2 Maximum Output Current
        3. 9.2.2.3 Switch Duty Cycle
        4. 9.2.2.4 Inductor Selection
        5. 9.2.2.5 Schottky Diode Selection
        6. 9.2.2.6 Compensation Capacitor Selection
        7. 9.2.2.7 Input and Output Capacitor Selection
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • 3-V to 18-V Input Voltage Range
  • High Output Voltage: Up to 38 V
  • 1.2-A Integrated Switch
  • 1.2-MHz Fixed Switching Frequency
  • 12 V at 300 mA and 24 V at 150 mA From 5-V Input (Typical)
  • Up to 93% Efficiency
  • On-The-Fly Output Voltage Reprogramming
  • Skip-Switching Cycle for Output Regulation at Light Load
  • Built-in Soft Start
  • 6-Pin, 2-mm × 2-mm QFN Package

2 Applications

  • 5-V to 12-V and 24-V, 12-V to 24-V Boost Converter
  • Buck Boost Regulation Using SEPIC Topology
  • ADSL Modems

3 Description

The TPS61170 is a monolithic, high-voltage switching regulator with integrated 1.2-A, 40-V power MOSFET. The device can be configured in several standard switching-regulator topologies, including boost and SEPIC. The device has a wide input-voltage range to support applications with input voltage from multicell batteries or regulated 5-V, 12-V power rails.

The TPS61170 operates at a 1.2-MHz switching frequency, allowing the use of low-profile inductors and low-value ceramic input and output capacitors. External loop compensation components give the user flexibility to optimize loop compensation and transient response. The device has built-in protection features, such as pulse-by-pulse overcurrent limit, soft start, and thermal shutdown.

The FB pin regulates to a reference voltage of 1.229 V. The reference voltage can be lowered using a 1-wire digital interface (Easyscale™ protocol) through the CTRL pin. Alternatively, a pulse width-modulation (PWM) signal can be applied to the CTRL pin. The duty cycle of the signal reduces the feedback reference voltage proportionally.

The TPS61170 is available in a 6-pin 2-mm × 2-mm QFN package, allowing a compact power-supply solution.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS61170 VSON (6) 2.00 mm x 2.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Typical Application Schematic

typ_app_lvs789.gif