LD1085D2M| Datasheet

LD1085D2M, LD1085D2M-R, LD1085D2M18R, LD1085D2M25R, LD1085D2M33R, LD1085D2T-R, LD1085D2T18R, LD1085D2T33R, LD1085DT15R, LD1085DT18R, LD1085DT25R, LD1085DT33R, LD1085P, LD1085P18, LD1085P33, LD1085P50, LD1085V, LD1085V25, LD1085V50, LD1085XX, LD1085XX15, LD1085XX18, LD1085XX25, LD1085XX33, LD1085XX50

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LD1085xx
3 A low drop positive voltage regulator adjustable and fixed
Features

Typical dropout 1.3 V (at 3 A) Three terminal adjustable or fixed output voltage 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V, 12 V. Automotive Grade product: adjustable VOUT only in TO-220 Full Pack package Guaranteed output current up to 3 A Output tolerance 1 % at 25 C and 2 % in full temperature range Internal power and thermal limit Wide operating temperature range -40 C to 125 C Package available: TO-220, TO-220FP, DPAK, D2PAK, D2PAK/A Pinout compatibility with standard adjustable VREG
DPAK D2PAK D2PAK/A

TO-220

TO-220FP

into the load, so increase efficiency. Only a 10 uF minimum capacitor is need for stability. The device is supplied in TO-220, TO-220FP, DPAK, D2PAK and D2PAK/A. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1 % at 25 C. The LD1085xx is available as Automotive Grade in TO-220FP package only, for the option of adjustable output voltage whose commercial part number is shown in the Table 11 (order codes). This device is qualified according to the specification AEC-Q100 of the Automotive market, in the temperature range -40 C to 125 C, and the statistical tests PAT, SYL, SBL are performed.

Description
The LD1085xx is a low drop voltage regulator able to provide up to 3 A of output current. Dropout is guaranteed at a maximum of 1.2 V at the maximum output current, decreasing at lower loads. The LD1085xx 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 LD1085xx quiescent current flows

Table 1.

Device summary
Part numbers LD1085XX LD1085XX15 LD1085XX18 LD1085XX25 LD1085XX33 LD1085XX50 Rev 21 1/28
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February 2008