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TPS65070 - Powering Processors with a Single IC


A 5-Channel Power Management IC with 3 DC/DCs and 2 LDOs in 6x6mm QFN -
Now Available at Digi-Key

Texas Instruments TPS65070 - 5-Channel Power Management ICTexas Instruments' TPS65070 is a single chip power management IC for portable applications consisting of a battery charger with power path management for a single Li-Ion or Li-Polymer cell. The charger can either be supplied by a USB port on pin USB or by a dc voltage from a wall adapter connected to pin AC. Three highly efficient 2.25MHz step-down converters are targeted at providing the core voltage, memory and I/O voltage in a processor based system. The step-down converters enter a low power mode at light load for maximum efficiency across the widest possible range of load currents.

TPS65070 Datasheet
  • Overview
  • Features & Applications
  • Diagram
  • Buy Now


Overview

For low noise applications the device can be forced into fixed frequency PWM using the I2C interface. The step-down converters allow the use of small inductors and capacitors to achieve a small solution size. The TPS65070 also integrates two general purpose LDOs for an output current of 200mA. These LDOs can be used to power an SD-card interface and an always-on rail, but can be used for other purposes as well. Each LDO operates with an input voltage range between 1.8V and 6.3V allowing them to be supplied from one of the step-down converters or directly from the main battery. An inductive boost converter with two programmable current sinks powers two strings of white LEDs.

The TPS65070 comes in a 48-pin leadless package (6mm × 6mm QFN) with a 0.4mm pitch.

Benefits of the TPS65070:
  •   Proven solution for many processors reduces time-to-market
  •   ~50% smaller solution compared to discrete solutions
  •   WLED backlight power for up to 5 displays
  •   DC/DC also offers power for peripherals, providing a complete system solution
  •   Highly flexible design supports many different applications


Features
  • Charger/Power Path Management:
    • 2A output current on the power path
    • Linear charger; 1.5A maximum charge current
    • 100mA/500mA/800mA/1300mA current limit from USB input
    • Thermal regulation, safety timers
    • Temperature sense input
  • 3 Step-Down Converters:
    • 2.25MHz fixed frequency operation
    • Up to 1.5A of output current
    • Adjustable or fixed output voltage
    • VIN range from 2.8V to 6.3V
    • Power save mode at light load current
    • Output voltage accuracy in PWM mode ±1.5%
    • Typical 19mA quiescent per converter
    • 100% duty cycle for lowest dropout
  • LDOs:
    • Fixed output voltage
    • Dynamic voltage scaling on LDO2
    • 20mA quiescent current
    • 200mA maximum output current
    • VIN Range from 1.8V to 6.3V

(continued)
  • wLED Boost Converter:
    • Internal dimming using I2C
    • Up to 2 × 10 LEDs
    • Up to 25mA per string with internal current sink
  • I2C interface
  • 10 Bit A/D converter
  • Touch screen interface
  • Undervoltage lockout and battery fault comparator

Applications
  • Portable navigation systems
  • PDAs, pocket PCs
  • OMAP™ and low power DSP supply
RoHS Compliant


Functional Block Diagram

Texas Instruments TPS65070 Pin Diagram


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 Available in Tape & Reel (-2-ND), Cut Tape (-1-ND), and custom Digi-Reel® (-6-ND)
Texas Instruments
Part Number
Digi-Key
Part Number
Voltage -
Supply
Operating Temperature
Package/Case
TPS65070RSLR
2.8 V ~ 6.3 V
-40°C ~ 85°C
48-QFN

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Voltage -
Supply
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-40°C ~ 85°C
48-QFN
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