DC2276A

DC2276A demonstration circuit is a 1.5A low dropout negative linear regulator featuring the LT®3091. This device is designed for applications requiring negative output voltage, high current without a heat sink, output adjustability to zero and low dropout voltage. 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 300mV. Operating quiescent current is nominally 1.2mA and drops to less than 1µA in shutdown. A single resistor adjusts the LT3091’s precision programmable current limit. The LT3091’s positive or negative current monitor either sources a current (0.25mA/A) or sinks a current (0.5mA/A) proportional to output current.

• Built-in protection: reverse O/P protection, internal current limit W/ foldback, TSD W/ hysteresis