LT3091MPDE#PBF

LT3091 is a low dropout negative linear regulator with programmable current limit that is easily paralleled to increase output current or spread heat on surface mounted boards. Designed with a precision current reference followed by a high performance rail-to-rail voltage buffer, this regulator finds use in applications requiring precision output, high current with no heat sink, output adjustability to zero and low dropout voltage. It features fast transient response, high PSRR and output noise as low as 18µVRMS. This yields virtually constant bandwidth, load regulation, PSRR and noise, independent of the programmed output voltage. A single resistor adjusts precision programmable current limit. Built-in protection includes reverse output protection, internal current limit with foldback and thermal shutdown with hysteresis. Typical applications are post regulator for switching supplies, low noise instrumentation and RF supplies, rugged industrial supplies, precision power supplies.

• Single resistor sets output voltage, programmable current limit
• 50µA SET pin current is ±1% initial accuracy
• Positive or negative output current monitor
• Parallelable for higher current and heat spreading
• Dropout voltage VIN = VOUT(nominal) is 173mV typical at LOAD = 1mA
• Configurable as a 3-terminal floating regulator
• Positive/negative shutdown logic or UVLO, stable with ceramic or tantalum capacitors
• Programmable cable drop compensation, stable with 10µF minimum output capacitor
• 14-lead (4mm × 3mm) plastic DFN package
• Temperature range from –55°C to 150°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party