LT3028 Datasheet | Linear Technology

.. LT3028 Dual 100m A/500m A Low Dropout, Low Noise, Micropower Regulators with Independent Inputs Features - - - - - - - - - - - - - - - DESCRIPTIO U APPLICATIO S - - - - - - Low Noise: 20µVRMS (10Hz to 100k Hz) Low Quiescent Current: 30µA/Output Independent Inputs Wide Input Voltage Range: 1.8V to 20V Output Current: 100m A/500m A Very Low Shutdown Current: <0.1µA Low Dropout Voltage: 300m V/320m V at 100m A/500m A Adjustable Outputs from 1.22V to 20V Stable with as Low as 1µF/3.3µF Output Capacitor Stable with Aluminum, Tantalum or Ceramic Capacitors Reverse-Battery Protected No Protection Diodes Needed Overcurrent and Overtemperature Protected Tracking/Sequencing Capability Thermally Enhanced 16-Lead TSSOP and 16-Lead (5mm × 3mm) DFN Packages Cellular Phones Pagers Battery-Powered Systems Frequency Synthesizers Wireless Modems Tracking/Sequencing Power Supplies The LT ®3028 is a dual, micropower, low noise, low dropout regulator with independent inputs. With an external 0.01µF bypass capacitor, output noise is a low 20µVRMS over a 10Hz to 100k Hz bandwidth. Designed for use in battery-powered systems, the low 30µA quiescent current per output makes it an ideal choice. In shutdown, quiescent current drops to less than 0.1µA. Shutdown control is independent for each output, allowing for flexibility in power management. The device is capable of operating over an input voltage range of 1.8V to 20V. Output 1 can supply 500m A of output current with a dropout voltage of 320m V. The device can supply 100m A of output current from Output 2 with a dropout voltage of 300m V. Quiescent current is well controlled in dropout. The LT3028 regulator is stable with output capacitors as low as 1µF for the 100m A output and 3.3µF for the 500m A output. Small ceramic capacitors can be used without the series resistance required by other regulators. Internal protection circuitry includes reverse-battery protection, current limiting and thermal limiting protection. The...