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Texas Instruments TPS7A74 Low-Dropout (LDO) Linear Regulator

Texas Instruments TPS7A74 Low-Dropout (LDO) Linear Regulator provides an easy-to-use, robust power management solution for various applications. User-programmable soft-start minimizes stress on the input power source by reducing capacitive inrush current on start-up. The soft-start is well-suited and monotonic for powering many types of processors and application-specific integrated circuits (ASICs). The enable input allows for easy sequencing with external regulators. This complete flexibility allows a solution to be configured that meets the sequencing requirements of digital signal processors (DSPs), field-programmable gate arrays (FPGAs), and other applications with special start-up requirements.

A precision reference and error amplifier deliver 1.5% accuracy over load, temperature, line, and process. The device is stable with any type of capacitor greater than or equal to 10µF. It is also fully specified for TJ = –40°C to +125°C. The Texas Instruments TPS7A74 is offered in a small, 3mm × 3mm, WSON-8 package, yielding a highly compact total solution size.

Features

  • 0.65V to 3.6V VOUT range
  • 0.65V to 6V ultra-low VIN range
  • 1.7V to 6V VBIAS range
  • 150mV typical at 1.5A, VBIAS = 5V low dropout
  • 7.1µVRMS noise
  • PSRR
    • 70dB at 1kHz
    • 60dB at 10kHz
    • 55dB at 100kHz
    • 50dB at 1MHz
  • 1.5% accuracy over line, load, and temperature
  • Programmable soft-start provides linear voltage start-up
  • VBIAS permits low VIN operation with good transient response
  • UVLO on both IN and BIAS
  • Stable with any output capacitor ≥ 10µF
  • Small, 3mm × 3mm × 0.8mm WSON-8 package

Applications

  • High-performance computing
  • Microservers
  • Desktop and PC motherboards
  • Data concentrators
  • Rugged PC laptops

Functional Block Diagram

Block Diagram - Texas Instruments TPS7A74 Low-Dropout (LDO) Linear Regulator

Texas Instruments TPS7A74 Low-Dropout (LDO) Linear Regulator