Product overview
Description
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.
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All 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
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STMicroelectronics - LD1085
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LD1085D2M-R | Active | D2PAK | Industrial | Ecopack2 | |
| LD1085D2M18R | Active | D2PAK | Industrial | Ecopack2 | |
| LD1085D2M25R | Active | D2PAK | Industrial | Ecopack2 | |
| LD1085D2M33R | Active | D2PAK | Industrial | Ecopack2 | |
| LD1085D2T-R | Active | D2PAK | Industrial | Ecopack2 | |
| LD1085D2T33R | Active | D2PAK | Industrial | Ecopack2 | |
| LD1085P | NRND | TO-220FP | Industrial | Ecopack2 | |
| LD1085V | Active | TO-220 | Industrial | Ecopack2 | |
| LD1085V50 | Active | TO-220 | Industrial | Ecopack2 | |
LD1085D2M18R
Package:
D2PAKMaterial Declaration**:
LD1085D2M25R
Package:
D2PAKMaterial Declaration**:
LD1085V50
Package:
TO-220Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Order from distributors | Order from ST | Marketing Status | ECCN (US) | ECCN (EU) | Packing Type | Package | Temperature (°C) | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| LD1085D2M33R | distributors No availability of distributors reported, please contact our sales office | Active | EAR99 | NEC | Tape and Reel | D2PAK | -40 | 125 | CHINA | | ||
| LD1085D2M-R | distributors No availability of distributors reported, please contact our sales office | Active | EAR99 | NEC | Tape and Reel | D2PAK | -40 | 125 | CHINA | | ||
| LD1085D2T33R | distributors No availability of distributors reported, please contact our sales office | Active | EAR99 | NEC | Tape and Reel | D2PAK | -40 | 125 | CHINA | | ||
| LD1085P | distributors No availability of distributors reported, please contact our sales office | NRND | EAR99 | NEC | Tube | TO-220FP | -40 | 125 | CHINA | | ||
| LD1085D2T-R | distributors No availability of distributors reported, please contact our sales office | Active | EAR99 | NEC | Tape and Reel | D2PAK | -40 | 125 | CHINA | | ||
| LD1085D2M25R | distributors No availability of distributors reported, please contact our sales office | Active | EAR99 | NEC | Tape and Reel | D2PAK | -40 | 125 | CHINA | | ||
| LD1085V50 | distributors No availability of distributors reported, please contact our sales office | Active | EAR99 | NEC | Tube | TO-220 | -40 | 125 | CHINA | | ||
| LD1085V | distributors No availability of distributors reported, please contact our sales office | Active | EAR99 | NEC | Tube | TO-220 | -40 | 125 | CHINA | | ||
| LD1085D2M18R | distributors No availability of distributors reported, please contact our sales office | Active | EAR99 | NEC | Tape and Reel | D2PAK | -40 | 125 | CHINA | | ||
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors