SLVSB02B November   2013  – July 2014 TPS62740 , TPS62742

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 DCS-Control™
      2. 7.3.2 CTRL / Output Load
      3. 7.3.3 Enable / Shutdown
      4. 7.3.4 Power Good Output (PG)
      5. 7.3.5 Output Voltage Selection (VSEL1 - 4)
      6. 7.3.6 Softstart
      7. 7.3.7 Undervoltage Lockout UVLO
    4. 7.4 Device Functional Modes
      1. 7.4.1 VOUT And LOAD Output Discharge
      2. 7.4.2 Automatic Transition Into 100% Mode
      3. 7.4.3 Internal Current Limit
      4. 7.4.4 Dynamic Voltage Scaling with VSEL Interface
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Inductor Selection
        2. 8.2.1.2 DC/DC Output Capacitor Selection
        3. 8.2.1.3 Input Capacitor Selection
      2. 8.2.2 Application Curves
    3. 8.3 System Example
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

1 Features

  • Input Voltage Range VIN from 2.2V to 5.5
  • Typ. 360nA Quiescent Current
  • Up to 90% Efficiency at 10µA Output Current
  • Up to 300mA / 400mA Output Current (TPS62740/TPS62742)
  • RF Friendly DCS-Control TM
  • Up to 2 MHz Switching Frequency
  • Low Output Ripple Voltage
  • 16 Selectable Output Voltages in 100mV Steps between 1.8V to 3.3V
  • Automatic Transition to No Ripple 100% Mode
  • Slew Rate Controlled Load Switch
  • Discharge Function on VOUT / LOAD
  • Power Good Output
  • Optimized for Operation with a Tiny 2.2µH Inductor and 10µF COUT
  • Total Solution Size <31mm2
  • Small 2 x 3 mm2 WSON Package

2 Applications

  • Bluetooth® Low Energy, RF4CE, Zigbee
  • Industrial Metering
  • Energy Harvesting

3 Description

The TPS6274x is industry's first step down converter featuring typ. 360nA quiescent current and operating with a tiny 2.2µH inductor and 10µF output capacitor. This new DCS-Control™ based device extends the light load efficiency range below 10µA load currents. TPS62740 supports output currents up to 300mA, TPS62742 up to 400mA. The device operates from rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-MnO2 and two or three cell alkaline batteries. The input voltage range up to 5.5V allows also operation from a USB port and thin-film solar modules. The output voltage is user selectable by four VSEL pins within a range from 1.8V to 3.3V in 100mV steps. TPS6274x features low output ripple voltage and low noise with a small output capacitor. Once the battery voltage comes close to the output voltage (close to 100% duty cycle) the device enters no ripple 100% mode operation to prevent an increase of output ripple voltage. The device then stops switching and the output is connected to the input voltage. The integrated slew rate controlled load switch provides typ. 0.6Ω on-resistance and can distribute the selected output voltage to a temporarily used sub-system. The TPS6274x is available in a small 12 pin 2 × 3mm2 WSON package and supports a total solutions size of 31mm2.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS62740 WSON 3.00 mm × 2.00 mm
TPS62742
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Typical Application

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