The LTC3035 is a micropower, VLDO™ (very low drop-out) linear regulator which operates from input voltages as low as 1.7V. The device is capable of supplying 300mA of output current with a typical dropout voltage of only 45mV. To allow operation at low input voltages the LTC3035 includes a charge pump generator that provides the necessary bias voltage for the internal LDO circuitry. Output current comes directly from the input supply for high efficiency regulation. The charge pump bias generator requires only a 0.1µF flying capacitor and a 1µF bypass capacitor for operation. The low 0.4V internal reference voltage allows the LTC3035 to be programmed to much lower output voltages than commonly available in LDOs. The output voltage is programmed via two tiny SMD resistors. The LTC3035’s low quiescent current makes it an ideal choice for use in battery-powered systems. Other features include high output voltage.
The LTC3035 provides a very low dropout (45 mV typical at 300 mA) linear regulation from 1.7 V to 5.5 V input. It includes an internal charge pump that generates a high‑side bias, allowing operation at low input voltages and programmable output from 0.4 V to 3.6 V.
The device is offered in an 8‑lead 3 mm × 2 mm DFN package, features low quiescent current (100 µA typ) and ultra‑low shutdown current (1 µA typ), and includes protections such as thermal overload, reverse‑output‑current, and output‑current limiting.