Linear regulator protects load with rapid output discharge

14th August 2014

Siobhan O'Gorman

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Datasheet

A linear regulator, delivering up to 100mA of continuous output current with a 250mV dropout voltage at full load, has been introduced by Linear Technology. Featuring an internal NMOS pull-down, the LT3061 discharges the output voltage if either the SHDN pin is driven low or the input voltage is turned off. With this rapid output discharge, the load is protected in applications requiring power conditioning on both start-up and shutdown.

The LT3061, which features a wide input voltage range of 1.6-45V, delivers adjustable output voltages of 0.6-19V. Providing only 30µVRMS across a 10Hz to 100kHz bandwidth and a reference soft-start functionality, the single capacitor prevents output voltage overshoot at turn-on. At ±2% over line, load and temperature, the regulator's output voltage tolerance is highly accurate.

Optimising stability and transient response, the device operates with a minimum value 3.3µF output capacitor. Adding to this stability is the regulator's internal protection circuitry, which includes reverse-battery protection, reverse-current protection and current limit.

The regulator's wide input and output voltage range, fast transient response, low quiescent current of 45µA (operating) and less than 2µA (in shutdown) make it suitable for battery-powered systems that require optimum run time. Other applications include automotive, industrial and avionic power supply.

Offering a compact footprint, the LT3061 is housed in thermally enhanced 8-lead 2x3mm DFN and MSOP packages. E- and I-grade versions feature an operating temperature from -40 to +125°C, while H-grade versions feature that of -40 to +150°C and MP-grade versions that from -55 to +150°C. 1,000 piece pricing starts at $1.55 each for both the DFN and MSOP package E-grades.