LTC1844 Datasheet | Linear Technology

Features - Very Low Dropout: 90m V at 150m A 30m V at 50m A (LTC1844-3.3) - Wide Input Voltage Range: 1.6V to 6.5V - Low 35µA Supply Current, Even in Dropout - Low Noise: 60µVRMS (10Hz to 100k Hz) - ±1.75% Voltage Accuracy Over Temperature, Voltage and Current Ranges - Fast Transient Response - 10n A 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 U APPLICATIO S - Portable Instruments and Battery-Powered Systems - Bluetooth/802.11 Cards - Cellular Phones - PDAs and Notebook puters LTC1844 Series 150m A, Micropower, Low Noise, VLDO Linear Regulator DESCRIPTIO The LTC®1844 Series are low noise VLDOTM (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 30µVRMS and typical dropout for the LTC1844-3.3 is just 90m V at the maximum load current of 150m A, reducing to 30m V at 50m A. The internal P-channel MOSFET pass transistor requires no base current, allowing the device to draw only 35µA during normal operation, independent of the dropout voltage and load current. The quiescent current falls to a negligible 10n A during shutdown. Other Features include high output voltage accuracy, excellent transient response, stability with ultralow ESR ceramic capacitors as small as 1µF, reverse-battery and reverse-current protection, short-circuit and thermal overload protection and output current...