This document introduces the LT ®3028 3028f dual 100mA/500mA low dropout, low noise, micropower regulator with independent inputs. With an external 0.01μF bypass capacitor, output noise is a low 20μVRMS over a 10Hz to 100kHz 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 500mA of output current with a dropout voltage of 320mV. The device can supply 100mA of output current from Output 2 with a dropout voltage of 300mV. Quiescent current is well controlled in dropout. The LT3028 regulator is stable over a 1.22V to 20V output voltage range with as little as 1µF/3.3µF output capacitor and with aluminum, tantalum, or ceramic capacitors. The device is reverse-battery protected, does not require protection diodes, and offers overcurrent and overtemperature protection. It also features tracking/sequencing capability. The LT3028 is available in thermally enhanced 16-Lead TSSOP and 16-Lead (5mm × 3mm) DFN packages.
The LT3028 is a dual, micropower, low noise, low dropout regulator with independent inputs designed for battery-powered systems. It features a low quiescent current of 30uA per output and drops to less than 0.1pA in shutdown. The device operates over an input voltage range of 1.8V to 20V and is available in adjustable and fixed output configurations.
| Output Noise | 20uVRms (10Hz to 100kHz) |
|---|---|
| Quiescent Current | 30uA/Output |
| Input Voltage Range | 1.8V to 20V |
| Output Current (Output 1) | 500mA |
| Output Current (Output 2) | 100mA |
| Shutdown Current | <0.1pA |
| Dropout Voltage (100mA) | 300mV |
The quiescent current is 30uA per output.
Yes, the device includes reverse-battery protection.
It is available in 16-lead TSSOP and 16-lead DFN packages.