LDO regulator features previously unavailable functionality

While the LT3086 features a 1.4-40V input voltage range, a single resistor programmes the output voltage from 0.4-32V and dropout voltage at 2.1A is just 330mV. Achieving line and load regulation of 0.1%, the LDO regulator includes a trimmed, precision 50µA current reference which is ±1% accurate. This provides ±2% output voltage tolerance over line, load and temperature. Thanks to the device's unity-gain voltage follower architecture, output voltage regulation, bandwidth, transient response and noise remain independent of output voltage.

Paralleling of multiple LT3086's is possible thanks to unique internal circuitry. This offers higher load current and heat spreading without needing external ballast resistors. System monitoring and diagnostic/debug capabilities are provided via output current and temperature monitoring, as well as a power good flag with programmable threshold. While programmable cable drop compensation cancels regulation errors caused by line drops to the load, the device’s reverse battery and reverse current protection add robustness to the end design. Internal fault circuitry includes thermal shutdown and current limit with foldback (thermal limit and current limit are externally programmable).

Operating over a temperature range from -40 to +125°C, E and I grade variants are available, as is an MP grade variant which operates over a temperature range from -55 to +125°C. The LT3086 is supplied in a selection of thermally enhanced surface mount packages, including a 0.75mm profile 16-lead 4x5mm DFN, a 16-lead thermally enhanced TSSOP, a 7-lead DD-Pak, and a 7-lead TO-220 power package for vertical mounting to heat sinks for higher power dissipation capability. Available now from stock, pricing for the products starts at $3.00 (USD) each in 1,000 unit quantities.