LT1086CM

Product Summary

The LT?1086 is designed to provide 1.5A with higher efficiency than currently available devices. All internalcircuitry is designed to operate down to 1V input-tooutput differential and the dropout voltage is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.5V at maximum output current, decreasing at lower load currents. On-chip trimming adjusts the reference/ouput voltage to 1%. Current limit is also trimmed, minimizing the stress on both the regulator and power source circuitry under overload conditions.The LT1086 is pin compatible with older 3-terminal adjustable regulators. A 10μF output capacitor is required on these new devices; however, this is usually included in most regulator designs.A 2.85V output version is offered for SCSI-2 active termination. For surface mount applications see the LT1117- 2.85 data sheet. For high current or lower dropout requirements see the LT1123-2.85 data sheet.Unlike PNP regulators, where up to 10% of the output current is wasted as quiescent current, the LT1086 quiescent current flows into the load, increasing efficiency.

Parametrics

LT1086 Series absolute maximum ratings:
Power Dissipation ............................... Internally Limited
Input Voltage (Note 1) .......................................... 30V
Operating Input Voltage
Adjustable Devices ........................................... 25V
2.85V Devices .................................................. 18V
3.3V, 3.6V, and 5V Devices ............................... 20V
12V Devices ...................................................... 25V
Operating Junction Temperature Range
“C” Grades
Control Section ............................... 0°C to 125°C
Power Transistor ............................. 0°C to 150°C
“I” Grades
Control Section .......................... – 40°C to 125°C
Power Transistor ........................ – 40°C to 150°C
“M” Grades
Control Section .......................... – 55°C to 150°C
Power Transistor ........................ – 55°C to 200°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°.

Features

Features:(1) 3-Terminal Adjustable or Fixed 2.85V, 3.3V, 3.6V, 5V, 12V;
(2) Output Current of 1.5A, (0.5A for LT1086H);
(3) Operates Down to 1V Dropout;
(4) Guaranteed Dropout Voltage at Multiple Current Levels;
(5) Line Regulation: 0.015%;
(6) Load Regulation: 0.1%;
(7) 100% Thermal Limit Functional Tes.

Diagrams

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