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The LDF is a fast, very low drop linear regulator which operates from an input supply voltage in the range of 2.6 V to 16 V.
It is available in fixed and adjustable output voltage versions, from 0.8 V to 12 V.
The LDF features are: high output precision, very low-dropout voltage, low noise, and low quiescent current, therefore suitable for low voltage microprocessors and memory applications.
Enable logic control pin and power-good output are featured on PPAK/DFN packages.
Current and thermal protection are provided.Key Features
- Input voltage from 2.6 to 16 V
- Very low-dropout voltage (500 mV max. at 1 A load)
- Low quiescent current (200 μA typ. @ 1 A load)
- Available in 1% precision in PPAK and DFN6 packages, 2% in DPAK
- 1 A guaranteed output current
- Wide range of output voltages available on request: adjustable from 0.8 V, fixed up to 12 V in 100 mV steps
- Logic-controlled electronic shutdown
- Power Good (PPAK and DFN packages)
- Fast dynamic response to line and load changes
- Internal current and thermal protections
- Temperature range: -40 °C to 125 °C
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LDF18PT-TR | Active | PPACK 5 | Industrial | Ecopack2 | |
| LDF25PT-TR | Active | PPACK 5 | Industrial | Ecopack2 | |
| LDF33DT-TR | Active | DPAK | Industrial | Ecopack2 | |
| LDF33PT-TR | Active | PPACK 5 | Industrial | Ecopack2 | |
| LDFPT-TR | Active | PPACK 5 | Industrial | Ecopack2 | |
| LDFPUR | Active | DFN6 3x3 | Industrial | Ecopack2 | |
| LDFPVR | Active | DFN6 2x2 | Industrial | Ecopack2 |
LDF18PT-TR
Package:
PPACK 5Material Declaration**:
LDF25PT-TR
Package:
PPACK 5Material Declaration**:
LDF33PT-TR
Package:
PPACK 5Material 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 | Package | Packing Type | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | Marketing Status | ECCN (US) | Country of Origin | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LDFPT-TR | 5 distributors | Get sample | PPACK 5 | Tape And Reel | - | 1 | 1 | Active | EAR99 | CHINA | 0.476 / 1k | |
| LDFPVR | 4 distributors | Get sample | DFN6 2x2 | Tape And Reel | - | 1 | 1 | Active | EAR99 | CHINA | 0.476 / 1k | |
| LDFPUR | 6 distributors | Get sample | DFN6 3x3 | Tape And Reel | - | 1 | 1 | Active | EAR99 | CHINA | 0.476 / 1k | |
| LDF33PT-TR | 5 distributors | Get sample | PPACK 5 | Tape And Reel | 3.3 | 1 | 1 | Active | EAR99 | CHINA | 0.549 / 1k | |
| LDF25PT-TR | 1 distributors | PPACK 5 | Tape And Reel | 2.5 | 1 | 1 | Active | EAR99 | CHINA | 0.549 / 1k | ||
| LDF18PT-TR | 1 distributors | PPACK 5 | Tape And Reel | 1.8 | 1 | 1 | Active | EAR99 | CHINA | 0.549 / 1k | ||
| LDF33DT-TR | No availability of distributors reported, please contact our sales office | DPAK | Tape And Reel | 3.3 | 2 | 1 | Active | EAR99 | CHINA | 0.549 / 1k |
LDF25PT-TR
Package
PPACK 5Packing Type
Tape And ReelBudgetary Price (US$)*/Qty
0.549 / 1kLDF18PT-TR
Package
PPACK 5Packing Type
Tape And ReelBudgetary Price (US$)*/Qty
0.549 / 1kLDF33DT-TR
Package
DPAKPacking Type
Tape And ReelBudgetary Price (US$)*/Qty
0.549 / 1k(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
