New Industry Products

Low IQ, Low VIN, Low VOUT, 300mA LDO

July 07, 2018 by Paul Shepard

The TPS7A10 from Texas Instruments is an ultra-small, low quiescent current, low-dropout regulator (LDO) that can source 300mA with an outstanding ac performance (load and line transient responses). This device has an input range of 0.75V to 3.3V, and output range of 0.5V to 3.0V with a very high accuracy of 1.5% over load, line and temperature. This performance is designed for powering the lower core voltages of the modern MCUs and analog sensors.

Applications are expected to include smart watches, fitness trackers, wireless headphones and earbuds, camera Modules, smart phones and tablets, portable medical devices, and so on.

The main power path is through VIN and can be connected to a power supply as low as 70mV above the output voltage. This device supports very low input voltages with the use of an additional VBIAS rail that is used to power the internal circuitry of the LDO.

Both VIN and VBIAS consume very low quiescent current of 1.6µA and 6µA, respectively. The low IQ and ultra-low dropout features helps in increasing the efficiency of the solution in the power-sensitive applications. For example, VIN can be an output of a high-efficiency, dc-dc step-down regulator, and the VBIAS pin can be connected to a rechargeable battery.

The TPS7A10 is equipped with an active pull-down circuit to quickly discharge the output when disabled, and provides a known start-up state.

Features include:

  • Ultra-Low Input Voltage Range: 0.75V to 3.3V
  • Ultra-Low Dropout for Minimum Power Loss:
    • 70mV (Maximum) at 300mA (VOUT > 1.0V)
  • Low Quiescent Current:
    • VIN IQ= 1.6µA (Typical)
    • VBIAS IQ= 6µA (Typical)
  • 5% Accuracy over Load, Line, and Temperature
  • High PSRR: 60dB at 1kHz
  • Available in Fixed-Output Voltages:
    • 5V to 3.0V (in 50-mV Steps)
  • VBIAS Range: 1.7V to 5.5V
  • Packages:
    • 74-mm × 1.09-mm WCSP-5
    • 50-mm × 1.50-mm WSON (Preview)
  • Built-In Soft Start With Monotonic VOUT Rise
  • Active Output Discharge

The TPS7A10 is available in an ultra-small, 5-pin DSBGA (YKA) package that makes it suitable for space-constrained applications.