SLVSBI1A October   2013  – September 2014 TPS61280 , TPS61281 , TPS61282

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Simplified Schematic
  5. Revision History
  6. Description (continued)
  7. Device Comparison Table
  8. Pin Configuration and Functions
  9. Specifications
    1. 9.1 Absolute Maximum Ratings
    2. 9.2 Handling Ratings
    3. 9.3 Recommended Operating Conditions
    4. 9.4 Thermal Information
    5. 9.5 Electrical Characteristics
    6. 9.6 Timing Requirements
    7. 9.7 I2C Interface Timing Characteristics
    8. 9.8 Typical Characteristics
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Voltage Scaling Management (VSEL)voltage scaling management functional description
      2. 10.3.2 Spread Spectrum, PWM Frequency dithering
    4. 10.4 Device Functional Modes
      1. 10.4.1 Power-Save Mode
      2. 10.4.2 Pass-Through Mode
      3. 10.4.3 Mode Selection
      4. 10.4.4 Current Limit Operation
      5. 10.4.5 Start-Up and Shutdown Mode
      6. 10.4.6 Undervoltage Lockout
      7. 10.4.7 Thermal Shutdown
      8. 10.4.8 Fault State and Power-Good
    5. 10.5 Programming
      1. 10.5.1 Serial Interface Description (TPS61280)
      2. 10.5.2 Standard-, Fast-, Fast-Mode Plus Protocol
      3. 10.5.3 HS-Mode Protocol
      4. 10.5.4 TPS6128x I2C Update Sequence
    6. 10.6 Register Maps
      1. 10.6.1  Slave Address Byte
      2. 10.6.2  Register Address Byte
      3. 10.6.3  I2C Registers, E2PROM, Write Protect
      4. 10.6.4  E2PROM Configuration Parameters
      5. 10.6.5  CONFIG Register
      6. 10.6.6  VOUTFLOORSET Register
      7. 10.6.7  VOUTROOFSET Register
      8. 10.6.8  ILIMSET Register
      9. 10.6.9  Status Register
      10. 10.6.10 E2PROMCTRL Register
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 TPS61281 with 2.5V-4.35 VIN, 1500 mA Output Current (TPS61280 with I2C Programmable)
        1. 11.2.1.1 Design Requirement
        2. 11.2.1.2 Detailed Design Parameters
          1. 11.2.1.2.1 Inductor Selection
          2. 11.2.1.2.2 Output Capacitor
          3. 11.2.1.2.3 Input Capacitor
          4. 11.2.1.2.4 Checking Loop Stability
        3. 11.2.1.3 Application Performance Curves
      2. 11.2.2 TPS61282 with 2.5V-4.35 VIN, 2000 mA Output Current (TPS61280 with I2C Programmable)
        1. 11.2.2.1 Design Requirements
        2. 11.2.2.2 Detailed Design Procedures
        3. 11.2.2.3 Application Performance Curves
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
    3. 13.3 Thermal Consideration
  14. 14Device and Documentation Support
    1. 14.1 Device Support
      1. 14.1.1 Third-Party Products Disclaimer
    2. 14.2 Related Links
    3. 14.3 Trademarks
    4. 14.4 Electrostatic Discharge Caution
    5. 14.5 Glossary
  15. 15Mechanical, Packaging, and Orderable Information
    1. 15.1 Package Summary
      1. 15.1.1 Chip Scale Package Dimensions

Package Options

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

1 Features

  • 95% Efficiency at 2.3MHz Operation
  • 2µA Quiescent Current in Low IQ Pass-Through Mode
  • Wide VIN Range From 2.3V to 4.8V
  • IOUT ≥ 4A (Peak) at VOUT = 3.35V, VIN ≥ 2.65V
  • Integrated Pass-Through Mode (35mΩ)
  • Programmable Valley Inductor Current Limit and Output Voltage
  • Programmable Average Input Current Limit and Output Voltage
  • True Pass-Through Mode During Shutdown
  • Best-in-Class Line and Load Transient
  • Low-Ripple Light-Load PFM Mode
  • In-Situ Customization with On-Chip E2PROM (Write Protect)
  • Two Interface Options:
    • I2C Compatible I/F up to 3.4Mbps (TPS61280)
    • Simple I/O Logic Control Interface (TPS6128x)
  • Thermal Shutdown and Overload Protection
  • Total Solution Size <20mm2, Sub 1-mm Profile

2 Applications

  • Single-Cell Ni-Rich, Si-Anode, Li-Ion, LiFePO4 Smart-Phones or Tablet PCs
  • 2.5G/3G/4G Mini-Module Data Cards
  • Current Limited Applications Featuring High Peak Power Loads

3 Description

The TPS6128x device provides a power supply solution for products powered by either by a Li-Ion, Nickel-Rich, Silicon Anode, Li-Ion or LiFePO4 battery. The voltage range is optimized for single-cell portable applications like in smart-phones or tablet PCs.

Used as a high-power pre-regulator, the TPS6128x extends the battery run-time and overcomes input current- and voltage limitations of the powered system.

While in shutdown, the TPS6128x operates in a true pass-through mode with only 2µA quiescent consumption for longest battery shelf life.

During operation, when the battery is at a good state-of-charge, a low-ohmic, high-efficient integrated pass-through path connects the battery to the powered system.

If the battery gets to a lower state of charge and its voltage becomes lower than the desired minimum system voltage, the device seamlessly transits into boost mode to utilize the full battery capacity.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS61280 DSBGA (16) 1.66 mm x 1.66 mm
TPS61281
TPS61282
  1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Simplified Schematic

device_sym_wcsp_61280_3.gif