LM2990

Input Voltage ....... ..... ..−26V to +0.3V
ESD Susceptibility (Note 2) .............2 kV
Power Dissipation (Note 3)...... Internally Limited
Junction Temperature (T_Jmax) ..........125°C
Storage Temperature ........−65°C to +150°C
Lead Temperature
(Soldering, 10 sec.)............. .. 260°C
Operating Ratings(Note 1)
Junction Temperature Range (T_J).. −40°C to +125°C
Maximum Input Voltage (Operational) .......−26V

The LM2990 is a three-terminal, low dropout, 1 ampere negative voltage regulator available with fixed output voltages of −5, −5.2, −12, and −15V.

The LM2990 uses new circuit design techniques to provide low dropout and low quiescent current. The dropout voltage at 1A load current is typically 0.6V and a guaranteed worst-case maximum of 1V over the entire operating temperature range. The quiescent current is typically 1 mA with 1A load current and an input-output voltage differentialgreater than 3V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical)when the regulator is in the dropout mode (V_OUT − V_IN 3V). Output voltage accuracy is guaranteed to ±5% over load, and temperature extremes.

The LM2990 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the devicewhen overloaded for an extended period of time. The LM2990 is available in a 3-lead TO-220 package and is ratedfor operation over the automotive temperature range of−40°C to +125°C.