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The LDLN025 is a 250 mA low-dropout voltage regulator, able to work with an input voltage range from 1.5 V to 5.5 V.
The typical dropout voltage at 250 mA load is 120 mV.
The very low quiescent current, which is just 12 μA at no-load, extends battery-life of applications requiring very long standby time.
Thanks to its ultra low noise value and high PSRR, the LDLN025 provides a very clean output, suitable for ultra-sensitive loads. It is stable with ceramic capacitors.
The enable logic control function puts the device into shutdown mode allowing a total current consumption lower than 1 μA.
The device also includes short-circuit and thermal protection.
Typical applications are noise sensitive loads such as ADC, VCO in mobile phones and tablets, wireless LAN devices. The LDLN025 is designed to keep the quiescent current under control and at a low value also during dropout operation, extending the operating time of battery-powered devices.
Several small package options are available.Key Features
- Ultra low output noise: 6.5 μVRMS
- Operating input voltage range: 1.5 V to 5.5 V
- Output current up to 250 mA
- Very low quiescent current: 12 μA at no-load
- Controlled Iq in dropout condition
- Very low-dropout voltage: 250 mV at 250 mA
- Very high PSRR: 80 dB@100 Hz, 60 dB @ 100 kHz
- Output voltage accuracy: 2% across line, load and temperature
- Output voltage versions: from 1 V to 5 V, with 50 mV step
- Logic-controlled electronic shutdown
- Output discharge feature
- Internal soft-start
- Overcurrent and thermal protections
- Temperature range: from -40 °C to +125 °C
- Packages: Flip-Chip4, DFN4-1x1, SOT23-5L
Sample & Buy
| Part Number | Package | Packing Type | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | Marketing Status | ECCN (US) | Country of Origin | More info | Approximate Price (US$)* / Qty | Order from ST | Order from Distributors |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LDLN025J33R | Flip-Chip 4 | Tape And Reel | 3.3 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025J25R | Flip-Chip 4 | Tape And Reel | 2.5 | 2 | 0.25 | Active | EAR99 | - | 0.62 / 1k | Check Availability | ||
| LDLN025PU18R | DFN4 1x1 | Tape And Reel | 1.8 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025J32R | Flip-Chip 4 | Tape And Reel | 3.2 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025PU29R | DFN4 1x1 | Tape And Reel | 2.9 | 2 | 0.25 | Active | EAR99 | PHILIPPINES | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025M25R | SOT23-5L | Tape And Reel | 2.5 | 2 | 0.25 | Active | EAR99 | MALAYSIA | Get sample | Check Availability | ||
| LDLN025M18R | SOT23-5L | Tape And Reel | - | 2 | 0.25 | Active | EAR99 | MALAYSIA | Get sample | Check Availability | ||
| LDLN025J18R | Flip-Chip 4 | Tape And Reel | 1.8 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025J275R | Flip-Chip 4 | Tape And Reel | 2.75 | 2 | 0.25 | Preview | EAR99 | - | 0.15 / 1k | No availability of distributors reported, please contact our sales office | ||
| LDLN025M45R | SOT23-5L | Tape And Reel | - | 2 | 0.25 | Active | EAR99 | MALAYSIA | Get sample | Check Availability | ||
| LDLN025M30R | SOT23-5L | Tape And Reel | - | 2 | 0.25 | Active | EAR99 | MALAYSIA | Get sample | Check Availability | ||
| LDLN025M12R | SOT23-5L | Tape And Reel | - | 2 | 0.25 | Active | EAR99 | MALAYSIA | Get sample | Check Availability | ||
| LDLN025M15R | SOT23-5L | Tape And Reel | - | 2 | 0.25 | Active | EAR99 | MALAYSIA | Get sample | Check Availability | ||
| LDLN025J50R | Flip-Chip 4 | Tape And Reel | - | 2 | 0.25 | Preview | EAR99 | - | 0.15 / 1k | No availability of distributors reported, please contact our sales office | ||
| LDLN025PU32R | DFN4 1x1 | Tape And Reel | 3.2 | 2 | 0.25 | Active | EAR99 | PHILIPPINES | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025PU33R | DFN4 1x1 | Tape And Reel | 3.3 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025J29R | Flip-Chip 4 | Tape And Reel | - | 2 | 0.25 | Active | EAR99 | - | 0.62 | No availability of distributors reported, please contact our sales office | ||
| LDLN025PU50R | DFN4 1x1 | Tape And Reel | 5 | 2 | 0.25 | Active | EAR99 | PHILIPPINES | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025J12R | Flip-Chip 4 | Tape And Reel | 1.2 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025M33R | SOT23-5L | Tape And Reel | - | 2 | 0.25 | Active | EAR99 | MALAYSIA | Get sample | Check Availability | ||
| LDLN025PU30R | DFN4 1x1 | Tape And Reel | 3 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025M28R | SOT23-5L | Tape And Reel | 2.8 | 2 | 0.25 | Active | EAR99 | MALAYSIA | Get sample | Check Availability | ||
| LDLN025PU25R | DFN4 1x1 | Tape And Reel | 2.5 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025PU12R | DFN4 1x1 | Tape And Reel | 1.2 | 2 | 0.25 | Active | EAR99 | - | Get sample | Check Availability | ||
| LDLN025J2925R | Flip-Chip 4 | Tape And Reel | 2.925 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025J30R | Flip-Chip 4 | Tape And Reel | 3 | 2 | 0.25 | Active | EAR99 | CHINA | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025PU28R | DFN4 1x1 | Tape And Reel | 2.8 | 2 | 0.25 | Active | EAR99 | CHINA | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025PU275R | DFN4 1x1 | Tape And Reel | 5 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability | |
| LDLN025J28R | Flip-Chip 4 | Tape And Reel | 2.8 | 2 | 0.25 | Active | EAR99 | - | 0.15 / 1k | Get sample | Check Availability |
LDLN025J25R
Package
Flip-Chip 4Packing Type
Tape And ReelApproximate Price (US$)* / Qty
0.62 / 1kLDLN025J275R
Package
Flip-Chip 4Packing Type
Tape And ReelApproximate Price (US$)* / Qty
0.15 / 1kLDLN025J50R
Package
Flip-Chip 4Packing Type
Tape And ReelApproximate Price (US$)* / Qty
0.15 / 1kLDLN025J29R
Package
Flip-Chip 4Packing Type
Tape And ReelApproximate Price (US$)* / Qty
0.62(*) 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
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Evaluation Tools
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Picture Part number Manufacturer Description 
STEVAL-LDO001V1 ST Quad high performance LDO evaluation board based on LDBL20, LDLN025, LD39130S and STLQ020 Part NumberQuad high performance LDO evaluation board based on LDBL20, LDLN025, LD39130S and STLQ020
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| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LDLN025J12R | Active | Flip-Chip 4 | Industrial | N/A | |
| LDLN025J18R | Active | Flip-Chip 4 | Industrial | N/A | |
| LDLN025J25R | Active | Flip-Chip 4 | Industrial | N/A | |
| LDLN025J275R | Preview | Flip-Chip 4 | Industrial | N/A | |
| LDLN025J28R | Active | Flip-Chip 4 | Industrial | Ecopack2 | |
| LDLN025J2925R | Active | Flip-Chip 4 | Industrial | N/A | |
| LDLN025J29R | Active | Flip-Chip 4 | Industrial | Ecopack2 | |
| LDLN025J30R | Active | Flip-Chip 4 | Industrial | N/A | |
| LDLN025J32R | Active | Flip-Chip 4 | Industrial | N/A | |
| LDLN025J33R | Active | Flip-Chip 4 | Industrial | Ecopack2 | |
| LDLN025J50R | Preview | Flip-Chip 4 | Industrial | N/A | |
| LDLN025M12R | Active | SOT23-5L | Industrial | Ecopack2 | |
| LDLN025M15R | Active | SOT23-5L | Industrial | Ecopack2 | |
| LDLN025M18R | Active | SOT23-5L | Industrial | Ecopack2 | |
| LDLN025M25R | Active | SOT23-5L | Industrial | Ecopack2 | |
| LDLN025M28R | Active | SOT23-5L | Industrial | Ecopack2 | |
| LDLN025M30R | Active | SOT23-5L | Industrial | Ecopack2 | |
| LDLN025M33R | Active | SOT23-5L | Industrial | Ecopack2 | |
| LDLN025M45R | Active | SOT23-5L | Industrial | Ecopack2 | |
| LDLN025PU12R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
| LDLN025PU18R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
| LDLN025PU25R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
| LDLN025PU275R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
| LDLN025PU28R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
| LDLN025PU29R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
| LDLN025PU30R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
| LDLN025PU32R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
| LDLN025PU33R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
| LDLN025PU50R | Active | DFN4 1x1 | Industrial | Ecopack2 | |
LDLN025J12R
Package:
Flip-Chip 4Material Declaration**:
LDLN025J25R
Package:
Flip-Chip 4Material Declaration**:
LDLN025J275R
Package:
Flip-Chip 4Material Declaration**:
LDLN025J29R
Package:
Flip-Chip 4Material Declaration**:
LDLN025J30R
Package:
Flip-Chip 4Material Declaration**:
LDLN025J32R
Package:
Flip-Chip 4Material Declaration**:
LDLN025J50R
Package:
Flip-Chip 4Material Declaration**:
LDLN025M12R
Package:
SOT23-5LMaterial Declaration**:
LDLN025M15R
Package:
SOT23-5LMaterial Declaration**:
LDLN025M28R
Package:
SOT23-5LMaterial Declaration**:
LDLN025M30R
Package:
SOT23-5LMaterial Declaration**:
LDLN025M33R
Package:
SOT23-5LMaterial Declaration**:
LDLN025PU12R
Package:
DFN4 1x1Material Declaration**:
LDLN025PU25R
Package:
DFN4 1x1Material Declaration**:
LDLN025PU30R
Package:
DFN4 1x1Material Declaration**:
LDLN025PU32R
Package:
DFN4 1x1Material Declaration**:
LDLN025PU33R
Package:
DFN4 1x1Material Declaration**:
LDLN025PU50R
Package:
DFN4 1x1Material 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.
