SLVSAE1B October   2010  – September 2015 TPS65708

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Setup
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  DC-DC Converters
      2. 8.3.2  Power Save Mode
      3. 8.3.3  Dynamic Voltage Positioning
      4. 8.3.4  Soft Start
      5. 8.3.5  100% Duty Cycle Low Dropout Operation
      6. 8.3.6  180° Out-of-Phase Operation
      7. 8.3.7  Undervoltage Lockout and Enable for DCDC1, DCDC2, LDO1, and LDO2
      8. 8.3.8  Output Voltage Discharge
      9. 8.3.9  Power-Up Sequencing
      10. 8.3.10 Short-Circuit Protection
      11. 8.3.11 Thermal Shutdown
      12. 8.3.12 LDOs
      13. 8.3.13 LED Driver
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Powering All Rails from the Input Supply of 5 V
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Output Filter Design (Inductor and Output Capacitor)
            1. 9.2.1.2.1.1 Inductor Selection
            2. 9.2.1.2.1.2 Output Capacitor Selection
            3. 9.2.1.2.1.3 Input Capacitor Selection
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Powering the LDOs From the Output of the DC-DC Converters to Improve Efficiency
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Community Resources
    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

  • Two 400-mA Step-Down Converters
  • Up to 95% Efficiency
  • VIN Range for DC-DC Converters From
    3.6 V to 6 V
  • 2.25-MHz Fixed-Frequency Operation
  • Power Save Mode at Light Load Current
  • Output Voltage Accuracy in PWM mode ±1.5%
  • 100% Duty Cycle for Lowest Dropout
  • 180° Out-of-Phase Operation
  • 2 General Purpose 200-mA LDOs
  • LDOs Optionally Powered From Step-Down Converters
  • 7.5-mA PWM Dimmable Current Sink
  • Available in a 16-Ball DSBGA (WCSP) With
    0.5-mm Pitch
  • Device Options:
    • VDCDC1 = 3.3 V
    • VDCDC2 = 1.8 V
    • VLDO1 = 2.8 V
    • VLDO2 = 1.2 V
    • ISINK(PWM=1) = 7.5 mA
    • SEQUENCING : DCDC1, LDO1, DCDC2, LDO2

2 Applications

  • Monitors
  • Laptops
  • Handheld Equipment

3 Description

The TPS65708 device is a power management unit targeted for embedded camera modules or other portable low-power consumer end equipment. The device contains two high-efficiency step-down converters, two low-dropout linear regulators, and a 7.5-mA current sink for driving a LED. The 2.25-MHz step-down converter enters a low-power mode at light load for maximum efficiency across the widest possible range of load currents. For low-noise applications, the devices can be forced into fixed-frequency PWM mode using the MODE pin. The device allows the use of small inductors and capacitors to achieve a small solution size. The TPS65708 device provides an output current of up to 400 mA on both DC-DC converters and up to 200 mA on each of the LDOs. The enable signal to the DC-DC converters and LDOs is generated internally by the undervoltage lockout circuit.

The TPS65708 comes in a small 16-pin wafer chip-scale package (WCSP) with 0.5-mm ball pitch.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS65708 DSBGA (16) 2.00 mm × 2.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Application Circuit

TPS65708 app_cir_lvsae1.gif