TPS65090 Front-End PMU With Switched-Mode Charger for 2 to 3 Cells In Series

1 Features

• Wide Input Voltage Charger and Power Path Management:
  • V_IN Range From 6 V to 17 V
  • Up to 4-A Output Current on the Power Path
  • Switched-Mode Charger; up to 4-A Maximum Charge Current
  • JEITA Compliant Charging Control
  • Thermal Regulation, Safety Timers
  • 2 Temperature Sense Inputs
• 3 Step-Down Converters:
  • High Efficiency Over a Wide Output Current Range
  • V_IN Range From 6 V to 17 V
  • 2 Fixed Output Voltages (5 V and 3.3 V)
    • Up to 5 A of Continuous Output Current
  • 1 Adjustable Output Voltage (From 1 V to 5 V)
    • Up to 4 A of Continuous Output Current
  • Output Voltage Accuracy ±1%
  • Typical 30-μA Quiescent Current Per Converter
• 2 Always-On LDOs:
  • 2 Fixed Output Voltages (5 V and 3.3 V)
  • Output Voltage Accuracy ±1%
  • Typical 10-μA Quiescent Current per LDO
• 7 Current-Limited Load Switches:
  • One System Voltage Switch With 1-A Current Limit
  • One 5-V Switch With 200-mA Current Limit, Reverse-Voltage Protected
  • One 3.3-V Switch With 3-A Current Limit
  • Four 3.3-V Switches With 1-A Current Limit
  • All Switches Controlled by I²C Interface
• I²C Interface
  • Standard-Mode (100 kHz) Supported
  • Fast-Mode (400 kHz) Supported
  • Fast-Mode Plus (1000 kHz) Supported
  • High-Speed (3.4 MHz) Supported
• 16-Channel, 10-Bit Analog-to-Digital Converter (ADC)
• Available in a 9-mm × 9-mm, VQFN-100 Package

2 Applications

• Battery-Powered Products Using 2 to 3 Li-Cells in Series
• Notebook Computers
• Mobile PCs and Mobile Internet Devices
• Industrial Metering Equipment
• Personal Medical Products

3 Description

The TPS65090A device is a single-chip power management IC for portable applications consisting of a battery charger with power path management for a dual or triple Li-Ion or Li-Polymer cell battery pack. The charger can be directly connected to an external wall adapter. Three highly efficient step-down converters are targeted for providing a fixed 5-V system voltage, a fixed 3.3-V system voltage, and an adjustable voltage rail. The step-down converters enter a low power mode at light load for maximum efficiency across the widest possible range of load currents. The step-down converters allow the use of small inductors and capacitors to achieve a small solution size. The TPS65090A also integrates two general-purpose always-on LDOs for powering circuit blocks which control the system while shut down. Each LDO operates with an input voltage range from 6 V to 17 V, allowing the LDOs to be supplied from the wall adapter or directly from the main battery pack.

Seven load switches are built into the device. These load switches can be used to control the power supply individually for certain circuit blocks in the application circuit. The current flowing through the load switches, as well as the output current of the step-down converters, the input current from the AC adapter and the charge current is monitored and can be read out using the digital interface.

1. For all available packages, see the orderable addendum at the end of the data sheet.

DC-DC Block Diagram

4 Revision History

Changes from A Revision (July 2013) to B Revision

• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo

Changes from * Revision (January 2013) to A Revision

• Added Differential Voltage spec condition "between CBC and LC", –0.3 MIN and 7 MAXGo
• Changed text in ALWAYS ON LDOs and POWER PATH CONTROL sections for clarification.Go
• Changed text in CHARGER section for clarification.Go
• Added INTERRUPTS section for clarification.Go
• Added text to REVERSE VOLTAGE PROTECTION section for clarification.Go
• Changed graph title from "ADAPTER INPUT POWER UP AND POWER DOWN" to "SUPPLEMENT MODE OPERATION"Go
• Added text to THERMAL INFORMATION section for clarification.Go

5 Pin Configuration and Functions

RVN Package

100-Pin VQFN-MR

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