DESCRIPTION
The LTC®1844 Series are low noise VLDO™ (very low dropout) linear regulators designed for low power/portable applications. These regulators can operate from input voltages as low as 1.6V. Typical output noise is only 30µVRMSand typical dropout for the LTC1844-3.3 is just 90mV at the maximum load current of 150mA, reducing to 30mV at 50mA.

FEATURES
■ Very Low Dropout:
  90mV at 150mA
  30mV at 50mA (LTC1844-3.3)
■ Wide Input Voltage Range: 1.6V to 6.5V
■ Low 35µA Supply Current, Even in Dropout
■ Low Noise: 30µVRMS(10Hz to 100kHz)
■ ±1.75% Voltage Accuracy Over Temperature, Voltage and Current Ranges
■ Fast Transient Response
■ 10nA Supply Current in Shutdown
■ Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 2.8V, 3.3V
■ Adjustable Output Voltage: 1.25V to 6V
■ Output Current Limit
■ Reverse-Battery and Reverse-Current Protection
■ No Protection Diodes Needed
■ Stable with 1µF Output Capacitor
■ Stable with Ceramic Capacitors
■ Short-Circuit and Thermal Overload Protection
■ Low Profile (1mm) SOT-23 Package