5A Low Dropout Fast Response Positive Regulators Adjustable and Fixed

The LT1585A/LT1585A-3.3 are low dropout 3-terminal regulators with 5A output current capability. Design has been optimized for low voltage applications where transient response and minimum input voltage are critical. Similar to the LT1084 family, these regulators feature lower dropout voltage and faster transient response. These improvements make them ideal for low voltage microprocessor applications requiring a regulated 2.5V to 3.6V output with an input supply below 7V.

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 would create excessive junction temperatures.

The LT1585A/LT1585A-3.3 are available in 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

* Pentium® Processor Supplies

* PowerPC™ Supplies

* Other 2.5V to 3.6V Microprocessor Supplies

* Low Voltage Logic Supplies

* Battery-Powered Circuitry

* Post Regulator for Switching Supply

* Fast Transient Response

* Guaranteed Dropout Voltage at Multiple Currents

* Load Regulation: 0.05% Typ

* Trimmed Current Limit

* On-Chip Thermal Limiting

* Standard 3-Pin Power Package