Description

The LD1085C is a low drop voltage regulator able to provide up to 3 A of output current. Dropout is guaranteed at a maximum of 1.5 V at the maximum output current, decreasing at lower loads. The LD1085C is pin to pin compatible with the older 3-terminal adjustable regulators, but has better performances in term of drop and output tolerance.

A 2.85 V output version is suitable for SCSI-2 active termination. Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the LD1085C quiescent current flows into the load, so increase efficiency. Only a 10 µF minimum capacitor is need for stability.

The device is supplied in DPAK. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 2 % at 25 °C.

Features

■ Typical dropout 1.3 V (at 3 A)

■ Three terminal adjustable output voltage

■ Guaranteed output current up to 3 A

■ Output tolerance ± 2 % at 25 °C and ± 3 % in full temperature range

■ Internal power and thermal limit

■ Wide operating temperature range -40 °C to 125 °C

■ Package available: DPAK

■ Pinout compatibility with standard adjustable VREG