LDO tolerates higher temperatures

High-voltage micropower low-dropout regulator is specified for 140C maximum operating temperature, adding extra margin in automotive applications.

Linear Technology has developed a higher temperature version of its LT3010 high-voltage micropower low-dropout regulator that delivers up to 50mA of continuous output current.

The newly released H grade version enables operation up to 140C, compared with the E grade which operates up to 125C.

The LT3010 features an input voltage range of 3 to 80V, delivering output voltages as low as 1.275V.

The LT3010-5 provides a fixed 5V output.

The 80V input voltage capability makes it ideal for automotive applications, 48V telecomms backup supplies and industrial control applications.

Low quiescent current of 30uA (operating) and 1uA (in shutdown) make it an excellent choice for battery-powered "keep alive" systems that require optimum run time.

Output noise is minimised at only 100uV RMS over a 10Hz to 100kHz bandwidth, making the LT3010/-5 ideal for noise sensitive applications.

For high voltage applications that require large input-to-output voltage differentials, the LT3010/-5 offers a very compact solution.

Its thermally enhanced MSOP-8 package offers thermal resistance equivalent to much larger conventional packages.

The LT3010/-5 is able to operate with very small, low cost, ceramic output capacitors.

It is stable with only a 1uF output capacitor while older linear regulators require between 10 and 100uF to maintain stability.

These tiny external capacitors can be used without the necessary addition of series resistance as is common with many other regulators.

Internal circuitry includes reverse-battery protection, current limiting, thermal limiting, and reverse current protection.

The LT3010/-5 is available from stock in an 8-lead thermally enhanced MSOP package.

Pricing starts at US $2.05 each for 1000-piece quantities.

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