Fixed 1.5V, 3A Low Dropout Fast Response GTL+ Regulator

The LT1587-1.5 is a low dropout 3-terminal regulator with a fixed 1.5V output voltage and 3A output current capability. The design is optimized for low voltage applications where transient response and minimum input voltage are critical. Similar to the LT1085, it has lower dropout and faster transient response. These improvements make it ideal for low voltage microprocessor applications, especially as the regulator in an Intel Pentium Pro processor GTL+ supply.

Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that creates excessive junction temperatures.

The LT1587-1.5 is available in both the through-hole and surface mount versions of the industry standard 3-pin TO-220 power package.

Output Current

Output Voltage Options

LT1584, -3.3, -3.38, -3.45, -3.6

7A

Adj, 3.3V, 3.38V, 3.45V, 3.6V

LT1585, -3.3, -3.38, -3.45, -3.6

4.6A

Adj, 3.3V, 3.38V, 3.45V, 3.6V

LT1585A, LT1585A-3.3

5A

Adj, 3.3V

LT1585-1.5, LT1585A-1.5

4.6A/5A

Fixed 1.5V

LT1587, -3.3, -3.45, -3.6

3A

Adj. 3.3V, 3.45V, 3.6V

LT1587-1.5

3A

Fixed 1.5V

Applications

* Intel Pentium® Pro Processor GTL+ Supply

* Low Voltage Logic Supplies

* Battery-Powered Circuitry

* Fast Transient Response

* Guaranteed Dropout Voltage at Multiple Currents

* Load Regulation: 0.05% Typ