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The LD39100 provides 1 A maximum current with an input voltage range from 1.5 V to 5.5 V and a typical dropout voltage of 200 mV. The device is stable with ceramic capacitors on the input and output. The ultra-low dropout voltage, low quiescent current and low-noise features make it suitable for low power battery-powered applications. Power supply rejection is 70 dB at low frequency and starts to roll off at 10 kHz. Enable logic control function puts the LD39100 in shutdown mode, allowing a total current consumption lower than 1 µA. The device also includes short-circuit constant current limiting and thermal protection. LD39100 is available also in AEC-Q100 qualified version, in the DFN6 (3x3 mm) with wettable flank package.
Key Features
- AEC-Q100 qualified
- Input voltage from 1.5 to 5.5Â V
- Ultra-low dropout voltage (200Â mV typ. at 1Â A load)
- Very low quiescent current (20 µA typ. at no load, 200 µA typ. at 1 A load, 1 µA max. in off mode)
- Very low-noise with no bypass capacitor (30 µ VRMS at VOUT = 0.8 V)
- Output voltage tolerance: ±2.0% at 25 °C
- 1 A guaranteed output current
- Wide range of output voltages available on request: 0.8Â V to 4.5Â V with 100Â mV step and adjustable from 0.8Â
- Logic-controlled electronic shutdown
- Stable with ceramic capacitors COUT = 1 µF
- Internal current and thermal limit
- DFN6 (3x3Â mm) package
- Temperature range: -40 °C to 125 °C
Sample & Buy
| Part Number | Package | Packing Type | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | Marketing Status | Budgetary Price (US$)* | Quantity | ECCN (US) | Country of Origin | More info | Order from Distributors | Order from ST |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LD39100PU12R | DFN6 3x3 | Tape And Reel | 1.2 | 2 | 1 |
Active
|
0.834 | 1000 | EAR99 | MALAYSIA | Check Availability | Get sample | |
| LD39100PURY | DFN6 3x3 | Tape And Reel | - | 2 | 1 |
Active
|
0.834 | 1000 | EAR99 | THAILAND | Check Availability | Get sample | |
| LD39100PU30R | DFN6 3x3 | Tape And Reel | 3 | 2 | 1 |
Preview
|
0.834 | 1000 | EAR99 | - | No availability of distributors reported, please contact our sales office | ||
| LD39100PU33RY | DFN6 3x3 | Tape And Reel | 3.3 | 2 | 1 |
Active
|
0.834 | 1000 | EAR99 | THAILAND | Check Availability | Get sample | |
| LD39100PU25RY | DFN6 3x3 | Tape And Reel | 2.5 | 2 | 1 |
Active
|
0.834 | 1000 | EAR99 | THAILAND | Check Availability | Get sample | |
| LD39100PU25R | DFN6 3x3 | Tape And Reel | 2.5 | 2 | 1 |
Preview
|
0.834 | 1000 | EAR99 | - | No availability of distributors reported, please contact our sales office | ||
| LD39100PU18RY | DFN6 3x3 | Tape And Reel | 1.8 | 2 | 1 |
Active
|
0.834 | 1000 | EAR99 | THAILAND | Check Availability | Get sample | |
| LD39100PU18R | DFN6 3x3 | Tape And Reel | 1.8 | 2 | 1 |
Preview
|
0.834 | 1000 | EAR99 | - | No availability of distributors reported, please contact our sales office | ||
| LD39100PU12RY | DFN6 3x3 | Tape And Reel | 1.2 | 2 | 1 |
Active
|
0.834 | 1000 | EAR99 | THAILAND | Check Availability | Get sample | |
| LD39100PUR | DFN6 3x3 | Tape And Reel | - | 2 | 1 |
Active
|
0.834 | 1000 | EAR99 | MALAYSIA | Check Availability | Get sample | |
| LD39100PU33R | DFN6 3x3 | Tape And Reel | 3.3 | 2 | 1 |
Active
|
0.834 | 1000 | EAR99 | MALAYSIA | Check Availability | Get sample |
LD39100PU30R
Package
DFN6 3x3Packing Type
Tape And ReelUnit Price (US$)
0.834*LD39100PU25R
Package
DFN6 3x3Packing Type
Tape And ReelUnit Price (US$)
0.834*LD39100PU18R
Package
DFN6 3x3Packing Type
Tape And ReelUnit Price (US$)
0.834*(*) 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
Featured Videos
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LD39100PU12R |
Active
|
DFN6 3x3 | Industrial | Ecopack2 |
|
| LD39100PU12RY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 | |
| LD39100PU18R |
Preview
|
DFN6 3x3 | Industrial | Ecopack2 |
|
| LD39100PU18RY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 | |
| LD39100PU25R |
Preview
|
DFN6 3x3 | Industrial | Ecopack2 |
|
| LD39100PU25RY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 |
|
| LD39100PU30R |
Preview
|
DFN6 3x3 | Industrial | Ecopack2 |
|
| LD39100PU33R |
Active
|
DFN6 3x3 | Industrial | Ecopack2 |
|
| LD39100PU33RY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 | |
| LD39100PUR |
Active
|
DFN6 3x3 | Industrial | Ecopack2 | |
| LD39100PURY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 |
LD39100PU12R
Package:
DFN6 3x3Material Declaration**:
LD39100PU18R
Package:
DFN6 3x3Material Declaration**:
LD39100PU25R
Package:
DFN6 3x3Material Declaration**:
LD39100PU25RY
Package:
DFN6 3x3Material Declaration**:
LD39100PU30R
Package:
DFN6 3x3Material Declaration**:
LD39100PU33R
Package:
DFN6 3x3Material 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.