LD1085:3 A low drop positive voltage regulator: adjustable and fixed

The LD1085 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 LD1085 is pin-to-pin compatible with the older 3-terminal adjustable regulators, but offers better performance in terms of drop and output tolerance.

Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the LD1085 quiescent current flows into the load, thus increase efficiency. Only a 10 μF minimum capacitor is need for stability.

The device is supplied in TO-220, TO-220FP, D²PAK and D²PAK/A packages. On-chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 1% at 25 °C.

Key Features

  • Typical dropout 1.3 V (at 3 A)
  • Three terminal adjustable or fixed output voltage 1.8 V, 2.5 V, 3.3 V, 5 V
  • 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, D²PAK, D²PAK/A
  • Pinout compatibility with standard adjustable VREG
Product Specifications
DescriptionVersionSize
DS1758: 3 A low drop positive voltage regulator: adjustable and fixed27.01 MB
Sample & Buy
Part NumberPackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
LD1085D2M33RD2PAK SMDTape And Reel-401250.4961000NECEAR99CHINA
LD1085D2M-RD2PAK SMDTape And Reel-401250.4961000NECEAR99CHINA
LD1085D2T33RD2PAK C-LEAD CUTTape And Reel-401250.4961000NECEAR99CHINA
LD1085PTO-220FPTube-401250.5721000NECEAR99CHINA
LD1085D2T-RD2PAK C-LEAD CUTTape And Reel-401250.4961000NECEAR99CHINA
LD1085D2M25RD2PAK SMDTape And Reel-401250.4961000NECEAR99CHINA
LD1085V50TO-220Tube-401250.4281000NECEAR99CHINA
LD1085VTO-220Tube-401250.4281000NECEAR99CHINA
LD1085D2M18RD2PAK SMDTape And Reel-401250.4961000NECEAR99CHINA
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
LD1085D2M33RD2PAK SMDIndustrialEcopack2md_do-wspc-d2pak-wspc-smd-wspc-3-wspc-leads_hzdolu33fc1-wspc-(ld1085d2m33r)-wspc-wcp-wspc-ver2_signed.pdf
md_do-wspc-d2pak-wspc-smd-wspc-3-wspc-leads_hzdolu33fc1-wspc-(ld1085d2m33r)-wspc-wcp-wspc-ver2.xml
LD1085D2M-RD2PAK SMDIndustrialEcopack2md_do-wspc-d2pak-wspc-smd-wspc-3-wspc-leads_hzdo-wspc-luadfc2_vers2_sdm_signed.pdf
md_do-wspc-d2pak-wspc-smd-wspc-3-wspc-leads_hzdo-wspc-luadfc2_vers2_sdm.xml
LD1085D2T33RD2PAK C-LEAD CUTIndustrialEcopack2md_dj-wspc-d2pak-wspc-central-wspc-lead-wspc-cut_hzdj-wspc-lu33fc1.pdf
md_dj-wspc-d2pak-wspc-central-wspc-lead-wspc-cut_hzdj-wspc-lu33fc1.xml
LD1085PTO-220FPIndustrialEcopack2md_ux-wspc-to-wspc-220-wspc-isol-wspc-full-wspc-pack-wspc-0.5_rzux-wspc-luadfc2.pdf
md_ux-wspc-to-wspc-220-wspc-isol-wspc-full-wspc-pack-wspc-0.5_rzux-wspc-luadfc2.xml
LD1085D2T-RD2PAK C-LEAD CUTIndustrialEcopack2md_dj-wspc-d2pak-wspc-central-wspc-lead-wspc-cut_hzdj-wspc-luadfc2.pdf
md_dj-wspc-d2pak-wspc-central-wspc-lead-wspc-cut_hzdj-wspc-luadfc2.xml
LD1085D2M25RD2PAK SMDIndustrialEcopack2
LD1085V50TO-220IndustrialEcopack1md_80-wspc-to-wspc-220-wspc-cu-wspc-wire-wspc-on-wspc-cu_mz80lu05fc1-wspc-(ld1085v50)_a_ver2_signed.pdf
md_80-wspc-to-wspc-220-wspc-cu-wspc-wire-wspc-on-wspc-cu_mz80lu05fc1-wspc-(ld1085v50)_a_ver2.xml
LD1085VTO-220IndustrialEcopack1
LD1085D2M18RD2PAK SMDIndustrialEcopack2
3 A low drop positive voltage regulator: adjustable and fixed LD1085
md_do-wspc-d2pak-wspc-smd-wspc-3-wspc-leads_hzdolu33fc1-wspc-(ld1085d2m33r)-wspc-wcp-wspc-ver2_signed.pdf LD1085
md_do-wspc-d2pak-wspc-smd-wspc-3-wspc-leads_hzdolu33fc1-wspc-(ld1085d2m33r)-wspc-wcp-wspc-ver2.xml LD1085
md_do-wspc-d2pak-wspc-smd-wspc-3-wspc-leads_hzdo-wspc-luadfc2_vers2_sdm_signed.pdf LD1085
md_do-wspc-d2pak-wspc-smd-wspc-3-wspc-leads_hzdo-wspc-luadfc2_vers2_sdm.xml LD1085
md_dj-wspc-d2pak-wspc-central-wspc-lead-wspc-cut_hzdj-wspc-lu33fc1.pdf LD1085
md_dj-wspc-d2pak-wspc-central-wspc-lead-wspc-cut_hzdj-wspc-lu33fc1.xml LD1085
md_ux-wspc-to-wspc-220-wspc-isol-wspc-full-wspc-pack-wspc-0.5_rzux-wspc-luadfc2.pdf LD1085
md_ux-wspc-to-wspc-220-wspc-isol-wspc-full-wspc-pack-wspc-0.5_rzux-wspc-luadfc2.xml LD1085
md_dj-wspc-d2pak-wspc-central-wspc-lead-wspc-cut_hzdj-wspc-luadfc2.pdf LD1085
md_dj-wspc-d2pak-wspc-central-wspc-lead-wspc-cut_hzdj-wspc-luadfc2.xml LD1085
md_80-wspc-to-wspc-220-wspc-cu-wspc-wire-wspc-on-wspc-cu_mz80lu05fc1-wspc-(ld1085v50)_a_ver2_signed.pdf LD1085
md_80-wspc-to-wspc-220-wspc-cu-wspc-wire-wspc-on-wspc-cu_mz80lu05fc1-wspc-(ld1085v50)_a_ver2.xml LD1085