Low Noise, 1.1A LDO Offers High Power Density

ec7oic309a Linear Technology announced the LT1965, a low noise, low voltage 1.1A LDO with high power density. It features low dropout voltage of 300 mV at full load, with wide V_IN capability of 1.8V to 20V and low adjustable output from 1.2V to 19.5V. Ultra-low output noise of only 40 µV_RMS reduces noise in instrumentation, RF, DSP and logic supply systems and is beneficial for post-regulating switching power supplies. Output tolerance is tightly regulated to within ±3 percent over line, load and temperature. The device’s low quiescent current of 500 µA (operating) and <1 µA (shutdown) make it an suitable for applications requiring high output drive capability with low current consumption. The LT1965 regulator optimizes stability and transient response with low ESR, ceramic output capacitors as small as 10 µF. These external capacitors can be used without any necessary series resistance as is common with many other regulators. Internal protection circuitry includes reverse-battery protection, no reverse current, current limiting with foldback, and thermal limiting.

Linear Technology
800-454-6327, www.linear.com [1]

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http://www.ecnmag.com/product-releases/2007/09/low-noise-11a-ldo-offers-high-power-density

Summary:

Linear Technology announced the LT1965, a low noise, low voltage 1.1A LDO with high power density. It features low dropout voltage of 300 mV at full load, with wide VIN capability of 1.8V to 20V and low adjustable output from 1.2V to 19.5V. Ultra-low output noise of only 40 µVRMS reduces noise in instrumentation, RF, DSP and logic supply systems and is beneficial for post-regulating switching power supplies.

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Ultra-low output noise, low adjustable output, ceramic output capacitors, output drive capability, low dropout voltage, wide VIN capability, high power density, low current consumption, post-regulating switching power, logic supply systems, Internal protection circuitry, necessary series resistance, Output tolerance, low noise, low voltage, low ESR, Linear Technology, external capacitors, thermal limiting, transient response, LT1965 regulator, reverse-battery protection, load, mV, percent, DSP, stability, regulators, LDO, RF, µVRMS, supplies, instrumentation, applications

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ICs [3]

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79 281

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Low Noise, 1.1A LDO Offers High Power Density

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