Texas Instruments TPS7A20 Low-Dropout (LDO) Linear Regulator

Texas Instruments TPS7A20 Low-Dropout (LDO) Linear Regulator

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Texas Instruments TPS7A20 Low-Dropout (LDO) Linear Regulator can source 300mA of output current. The TPS7A20 is designed to provide low noise, high PSRR, and excellent load and line transient performance that can meet the requirements of RF and other sensitive analog circuits. Using innovative design techniques, the TPS7A20 offers an ultra-low noise performance without the addition of a noise bypass capacitor. The TPS7A20 also provides the advantage of low quiescent current, which can be ideal for battery-powered applications.

With an input voltage range of 1.6V to 6.0V and an output range of 0.8V to 5.5V, the Texas Instruments TPS7A20 can be used for a wide variety of applications. The device uses a precision reference circuit to provide maximum accuracy of 1.5% overload, line, and temperature variations. The Texas Instruments TPS7A20 features an internal soft-start to lower the inrush current, thus minimizing the input voltage drop during startup. The device is stable with small ceramic capacitors, allowing for a small overall solution size.

Block Diagram

Features

  • 7µVRMS low output voltage noise
    • No noise-bypass capacitor required
  • 95dB at 1kHz high PSRR
  • 6.5µA very low IQ
  • 1.6V to 6.0V input voltage range
  • 0.8V to 5.5V output voltage range
  • ±1.5% (max) output voltage tolerance
  • Very low dropout
    • 140mV (max) at 300mA (VOUT = 3.3V)
  • Low inrush current
  • Smart enable pulldown
  • Stable with 1µF minimum ceramic output capacitor
  • Packages
    • 1mm × 1mm X2SON

The TPS7A20 has a smart enable input circuit with an internally controlled pulldown resistor that keeps the LDO disabled even when the EN pin is left floating and helps eliminate the external components used to pulldown the EN pin.

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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