LT3091 Datasheet | Linear Technology Corporation

- 36V, 1.5A Negative Linear Regulator with Programmable Current Limit Features Description nn Output Current: 1.5A nn Single Resistor Sets Output Voltage nn 50µA SET Pin Current: ±1% Initial Accuracy nn Programmable Current Limit nn Positive or Negative Output Current Monitor nn Parallelable for Higher Current and Heat Spreading nn Low Dropout Voltage: 300m V nn Low Output Noise: 18µVRMS (10Hz to 100k Hz) nn Configurable as a 3-Terminal Floating Regulator nn Wide Input Voltage Range: - 1.5V to - 36V nn Rail-to-Rail Output Voltage Range: 0V to - 32V nn Positive/Negative Shutdown Logic or UVLO nn Programmable Cable Drop pensation nn Load Regulation: 1.2m V (1m A to 1.5A) nn Stable with 10µF Minimum Output Capacitor nn Stable with Ceramic or Tantalum Capacitors nn Thermally Enhanced 14-Lead 4mm × 3mm DFN, 16-Lead TSSOP, 7-Lead TO-220 and DD Packages Applications nn Post Regulator for Switching Supplies nn Low Noise Instrumentation and RF Supplies nn Rugged Industrial Supplies nn Precision Power Supplies The LT®3091 is a 1.5A, low dropout negative linear regulator 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. The device can also be configured as a 3-terminal floating regulator. The LT3091 Features fast transient response, high PSRR and output noise as low as 18µVRMS. The LT3091 generates a wide output voltage range (0V to - 32V) while maintaining unity gain operation. This yields virtually constant bandwidth, load regulation, PSRR and noise, independent of the programmed output voltage. The LT3091 supplies 1.5A at a typical dropout voltage of 300m V. Operating quiescent current is nominally 1.2m A and drops to << 1µA in shutdown. A single resistor adjusts the...