Date: 19/08/2010

New MP grade 500mA micropower low dropout regulator from Linear Tech

Linear Technology has released a new high reliability, military plastic MP-grade version of the LT1175, a 500mA negative micropower low dropout regulator. The MP-grade LT1175 is offered in SOIC-8 and DD-Pak packages with a -55°C to +125°C operating junction temperature range. LT1175 accept input voltage in the range of -4.3V to -20V, features micropower operating currents of 45uA quiescent and 10uA in shutdown . The highlights of this device are it features a reference amplifier topology ensuring precision DC characteristics and the ability to maintain good loop stability with a wide range of output capacitors and the device’s power transistor anti-saturation design enables very low dropout voltage of 500mV (typical at full load). Fixed 5V and adjustable (-3.8V to -19.5V) output voltage versions are available.

The SHDN pin can interface directly to either positive or negative logic levels. Unlike prior regulators, the increase in quiescent current during a dropout condition is actively limited. The LT1175 offers complete protection including user-selectable current limit at 200mA, 400mA, 600mA and 800mA, power limiting (current limit foldback), thermal shutdown and the ability to force the output to reverse voltage without damage or latchup.

Operating temperature range:
C grade is specified from 0°C to +125°C.
I grade is specified from -40°C to +125°C.
MP grade is specified from -55°C to +125°C.

Price: The MP grade in DD-Pak is priced at US$9.60 and in SOIC is priced at US$8.70.

Availability: Now