DescriptionThe LD1084xx is a low drop voltage regulator able to provide up to 5 A of output current. Dropout is guaranteed at a maximum of 1.5 V at the maximum output current, decreasing at lower loads. The LD1084xx 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 LD1084xx quiescent current flows minimum capacitor is need for stability.The device is supplied in TO-220. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1 % at 25 C. TO-220Table 1.Device summaryPart numbersOrder codesOutput voltageLD1084XX12LD1084V1212 VLD1084XX25LD1084V252.5 VLD1084XX50LD1084V505.0 VLD1084XXLD1084VAdjustablewww.st.comContentsLD1084xx 2/19 Contents1Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features Typical dropout 1.3 V (at 5 A)Three terminal adjustable or fixed output voltage 2.5 V, 5 V, 12 V.Guaranteed output current up to 5 AOutput tolerance 1 % at 25 C and 2 % in full temperature rangeInternal power and thermal limitWide operating temperature range -40 C to 125 CPackage available: TO-220Pinout compatibility with standard adjustable VREG DescriptionThe LD1084xx is a low drop voltage regulator able to provide up to 5 A of output current. Dropout is guaranteed at a maximum of 1.5 V at the maximum output current, decreasing at lower loads. The LD1084xx 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 LD1084xx quiescent current flows minimum capacitor is need for stability.The device is supplied in TO-220. On chip trimming al specifications are available at: www.st.com. L