Texas Instruments TPS7A20 Low-Dropout (LDO) Linear Regulator

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

• 7µV_RMS low output voltage noise
  • No noise-bypass capacitor required
• 95dB at 1kHz high PSRR
• 6.5µA very low I_Q
• 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 (V_OUT = 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.