LINEAR Technology, represented by Soanar , has announced new wider temperature range versions of its LT1763 and LT1764A high current, low noise, linear regulators.
The new "MP" grade features operation from -55°C to +125°C for a wide range of applications including avionics, military, industrial, RF and telecom.
The LT1764A is a 3A LDO with low 40μV rms output noise over the 10Hz to 100kHz bandwidth, ideal for powering RF circuits. Supply current of 1mA is reduced to less than 1μA in shutdown mode. The LT1764A can operate from a 2.7V to 20V input supply, ensuring compatibility with a wide range of input power sources. Output voltage is adjustable between 1.21V and 20V.
The LT1763 is a 500mA LDO featuring less than 20μV rms output noise over a 10Hz to 100kHz bandwidth using only a tiny 0.01μF bypass capacitor. Supply current is only 30μA and is reduced to less than 0.5μA in shutdown mode, virtually eliminating battery drain.
The device operates from a 1.8V to 20V input supply, providing compatibility with a wide variety of input power sources. The LT1763 can also operate with capacitors as small as 3.3μF and is stable using any capacitor type, including ceramic, tantalum, or aluminum electrolytic.
This results in a small, low-cost solution for space-constrained applications. Output voltage is adjustable between 1.22V and 20V.
Both linear regulators feature internal reverse battery protection for guarding against reverse current flow when the supply is reversed without requiring external protection diodes.
In addition, the output can be pulled below ground without damaging the device. Other protection circuitry includes current limiting and thermal limiting.