Diodes Incorporated – 150mA LDO ideal for portable equipment and USB power systems


The AP7380 series of Low Dropout (LDO) regulators introduced by Diodes Incorporated operates from a wide 3.5V to 24V input-voltage range and offers various fixed output-voltage options.

The LDO consists of a voltage reference, an error amplifier, a resistor network for setting the output voltage, a current-limit circuit for over- current protection, and a chip-enable circuit.

The AP7380’s wide input-voltage range enables operation from standard 5V, 9V or 12V system power rails with sufficient overhead to cope with supply transients. Parts in the AP7380 series offer regulated output voltages of 3.0V, 3.3V, 4.15V, 4.4V and 5.0V.

The device provides excellent line and load regulation, maintaining output accuracy of ±1% at room temperature under all I/O voltage conditions up to a maximum load current of 150mA.

The AP7380’s dropout voltage is just 250mV at an output voltage of 5V and load current of 50mA. At just 10nA, the AP7380’s stand-by current helps to minimise power consumption when the host device is in power-down mode.


  • Compatible with low-ESR ceramic capacitor
  • ±100ppm/°C temperature coefficient of output voltage
  • 1.8μA ground current
  • Thermal shut-down protection


  • USB power systems
  • Portable equipment
  • Consumer devices
  • Instrumentation and metering