LM2940

MICROCIRCUIT DATA SHEET MNLM2940-12-X REV 1A1 1A LOW DROPOUT REGULATOR General Description The LM2940 positive voltage regulator features the ability to source 1A of ouput current with a dropout voltage of typically 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3V. The quiescent current with 1A of output current and an input-output differential of 5V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (Vin - Vout < 3V). Designed also for vehicular applications, the LM2940 and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automaically shut down to protect both the internal circuits and the load. The LM2940 cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided. Original Creation Date: 07/22/96 Last Update Date: 10/08/99 Last Major Revision Date: 07/22/96 Industry Part Number LM2940 NS Part Numbers LM2940J-12/883 LM2940K-12/883 LM2940WG-12/883 Prime Die LM2940 Controlling Document SEE FEATURE SECTION Processing MIL-STD-883, Method 5004 Subgrp Description 1 2 3 4 5 6 7 8A 8B 9 10 11 Static tests at Static tests at Static tests at Dynamic tests at Dynamic tests at Dynamic tests at Functional tests at Functional tests at Functional tests at Switching tests at Switching tests at Switching tests at Temp ( oC) +25 +125 -55 +25 +125 -55 +25 +125 -55 +25 +125 -55 Quality Conformance Inspection MIL-STD-883, Method 5005 1 MNLM2940-12-X REV 1A1 MICROCIRCUIT DATA SHEET Features Dropout voltage typically 0.5V @ Io = 1A Output current in excess of 1A Output voltage trimmed before assembly Reverse battery protection Internal short circuit current limit Mirror image insertion protection CONTROLLING DOCUMENT LM2940J-12/883 5962-9088401QEA LM2940K-12/883 5962-9088401MYA LM2940WG-12/883 5962-9088401QXA 2 MNLM2940-12-X REV 1A1 MICROCIRCUIT DATA SHEET (Absolute Maximum Ratings) (Note 1) Input Voltage (Survival Voltage