13 November 2013
Power Electronics / Power Management
Linear Technology announced a new H grade, wider temperature range version of the LT1965 1 A LDO (low-dropout) regulator with high power density. The IC features low dropout voltage of only 300 mV at full load, wide VIN capability of 1,8 V to 20 V and an adjustable output from 1,2 V to 19,5 V. 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.
Output tolerance is tightly regulated to within ±3% over line, load and temperature. The device’s low quiescent current of 500 μA (operating) and less than 1 μA (shutdown) make it an excellent choice for applications requiring high output drive capability with low current consumption.
The LT1965 optimises stability and transient response with low ESR, ceramic output capacitors as small as 10 μF. These tiny 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.
For applications requiring large input-to-output differentials, the LT1965 offers a very compact and thermally effective solution. The H grade is rated from -40°C to +150°C operating junction temperature and is offered in the low-profile (0,75 mm) 8-lead DFN (3 x 3 mm) package, the surface-mount DD-Pak power package and the TO-220 power package.
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