SBAS221H December   2001  – October  2015 REG71050 , REG71055

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Shutdown Mode
      2. 8.3.2 Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Peak Current Reduction
      2. 8.4.2 Efficiency
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Capacitor Selection
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 1.8 V to 5.0 V With 10-mA Output Current
      2. 9.3.2 Doubling the Output Current
      3. 9.3.3 Driving LEDs
  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 Related Links
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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1 Features

  • Wide Input Voltage Range: 1.8 V to 5.5 V
  • Automatic Step-Up and Step-Down Operation
  • Low Input Current Ripple
  • Low Output Voltage Ripple
  • Minimum Number of External Components—No Inductors
  • 1-MHz Internal Oscillator Allows Small Capacitors
  • Shutdown Mode
  • Thermal and Current Limit Protection
  • Six Fixed Output Voltages Available:
    • 2.5 V, 2.7 V, 3 V, 3.3 V, 5 V, 5.5 V

2 Applications

  • White LED Driver
  • Smart Card Readers
  • SIM Cards
  • Handheld devices
  • Modems
  • PCMCIA Cards
  • LCD Displays
  • Battery Backup Supplies

3 Description

The REG710 family of devices are switched capacitor voltage converters that generate regulated, low-ripple output voltage from an unregulated input voltage. A wide input supply voltage from 1.8 V to 5.5 V makes the REG710 family of devices ideal for a variety of battery sources, such as single-cell Li-Ion, or 2-cell and 3-cell nickel-based or alkaline-based chemistries.

The input voltage may vary above and below the output voltage and the output remains in regulation. The device works as step-up or step-down converters without the need of an inductor, providing low EMI DC-DC conversion. The high switching frequency allows the use of small surface-mount capacitors, saving board space and reducing cost. The REG710 device is thermally protected and current limited, protecting the load and the regulator during fault conditions. Typical ground pin current (quiescent current) is 65 μA with no load, and less than 1 μA in shutdown mode.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
REG710 SOT-23 (6) 2.90 mm × 1.60 mm
REG71050 SOT (6) 2.90 mm × 1.60 mm
SON (6) 2.00 mm × 2.00 mm
REG71055 SOT-23 (6) 2.90 mm × 1.60 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

spacing

Typical Operating Circuit

REG71050 REG71055 REG710 ai_typ_cir_bas221.gif

Efficiency vs Load Current

REG71050 REG71055 REG710 tc_eff_load_bas221.gif