Linear offers 20V LDO upgrade

October 12, 2016 // By
Linear Technology Corp. (Milpitas, Calif.) has announced the availability of the LT3405, a low-noise, high power supply ripple rejection (PSRR) low dropout (LDO) voltage linear regulator.

The LDO provides 500mA and operates at 20V with 0.8µV RMS noise and 76dB PSRR at 1MHz. It is higher output current version of the 200mA LT3042 ultralow noise LDO.

The LT3045 utilizes Linear’s proprietary LDO architecture that permits using LT3045s in parallel to further decrease noise, increase output current and spread heat on a printed circuit board.

The LT3045 delivers up to 500mA output current with a 260mV dropout voltage at full load, across a wide 1.8V to 20V input voltage range. Output voltage range is 0V to 15V and output voltage tolerance is highly accurate at ±2 percent over line, load and temperature. The device’s wide input and output voltage ranges, high bandwidth, high PSRR and ultralow noise performance are ideal for powering noise-sensitive applications such as PLLs, VCOs, mixers,  LNAs, very low noise instrumentation, high speed/high precision data converters, medical applications such as imaging and diagnostics, precision power supplies and as a post-regulator for switching supplies.

The LT3045 is available in thermally enhanced 10-lead 3mm x 3mm DFN (pin-compatible with the LT3042) and 12-lead MSOP packages, both with a compact footprint. Devices are in stock, priced starting at $2.80 each in 1,000-piece quantities.

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