Product overview
Description
The LD56100 high accuracy voltage regulator provides 1 A of current from an input voltage ranging from 1.8 V to 5.5 V, with a typical dropout voltage of 120 mV.
It is available in DFN8 (1.2 x 1.6 mm) package, allowing the maximum space saving.
The device is stabilized with a ceramic capacitor on the output. The ultra-low drop voltage, low quiescent current and fast transient response, together with the internal soft-start circuit, make the LD56100 suitable for low power battery-operated applications.
An enable logic control function puts the LD56100 in shutdown mode allowing a total current consumption lower than 0.1 μA. Short-circuit protection with current limit foldback and thermal protection are also included.
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All features
- Input voltage from 1.8 to 5.5 V
- Ultra-low dropout voltage (120 mV typ. at 1 A load and VOUT = 3.3 V)
- Very low quiescent current (100 µA typ. at no-load, 0.03 µA typ. in off mode)
- Output voltage tolerance: ± 1% from -40 °C to +85 °C
- Ultra-low Noise: 13 µV RMS Noise from 10 Hz to 100 kHz at VOUT = 3.0 V
- High PSRR (70 dB@1 kHz)
- Wide range of output voltages available on request: from 1.0 V up to 5.0 V in 50 mV step
- Logic-controlled electronic shutdown
- Internal soft-start
- Optional output voltage discharge feature
- Compatible with ceramic capacitor COUT = 1 µF
- Internal current limit foldback and thermal protections
- Available in DFN8 (1.2x1.6 mm)
- Operating temperature range: -40 °C to 125 °C
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EDA Symbols, Footprints and 3D Models
STMicroelectronics - LD56100
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| LD56100DPU15R | Preview | DFN8 1.2x1.6 | Industrial | Ecopack2 | - | - | |
| LD56100DPU18R | Active | DFN8 1.2x1.6 | Industrial | Ecopack2 | - | - | |
| LD56100DPU25R | Active | DFN8 1.2x1.6 | Industrial | Ecopack2 | - | - | |
| LD56100DPU28R | Active | DFN8 1.2x1.6 | Industrial | Ecopack2 | - | - | |
| LD56100DPU30R | Active | DFN8 1.2x1.6 | Industrial | Ecopack2 | - | - | |
| LD56100DPU33R | Active | DFN8 1.2x1.6 | Industrial | Ecopack2 | - | - |
Marketing Status
Package
DFN8 1.2x1.6
Grade
Industrial
RoHS Compliance Grade
Ecopack2
Marketing Status
Package
DFN8 1.2x1.6
Grade
Industrial
RoHS Compliance Grade
Ecopack2
Marketing Status
Package
DFN8 1.2x1.6
Grade
Industrial
RoHS Compliance Grade
Ecopack2
Marketing Status
Package
DFN8 1.2x1.6
Grade
Industrial
RoHS Compliance Grade
Ecopack2
Marketing Status
Package
DFN8 1.2x1.6
Grade
Industrial
RoHS Compliance Grade
Ecopack2
(**) 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 | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | Grade | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | ||||||||||||||||||||||||||||||||||||||||||||||
| LD56100DPU18R | | | Available at 2 distributors Distributor availability of LD56100DPU18R
Distributor reported inventory date: 4/26/2025 | | | | Buy from Distributor | |
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| LD56100DPU28R | | | Available at 2 distributors Distributor availability of LD56100DPU28R
Distributor reported inventory date: 4/26/2025 | | | | Buy from Distributor | |
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| LD56100DPU15R | | | Available at distributors Distributor availability of LD56100DPU15R
Distributor reported inventory date: | | | | Buy from Distributor | |
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| LD56100DPU33R | | | Available at 4 distributors Distributor availability of LD56100DPU33R
Distributor reported inventory date: 4/27/2025 | | | | Buy from Distributor | |
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| LD56100DPU30R | | | Available at 3 distributors Distributor availability of LD56100DPU30R
Distributor reported inventory date: 4/26/2025 | | | | Buy from Distributor | |
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| LD56100DPU25R | | | Available at 2 distributors Distributor availability of LD56100DPU25R
Distributor reported inventory date: 4/26/2025 | | | | Buy from Distributor | |
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LD56100DPU18R Active
Part Number:
LD56100DPU18R
Operating Temperature (°C)
Min:
Max:
Grade:
Industrial
Output Voltage (V) (nom):
1.8
Output Tolerance (typ):
1
Output Current (A) (nom):
1
FUTURE
Stock
200Min.Order
1DIGIKEY
Stock
2796Min.Order
1Distributor reported inventory date: 4/26/2025
Stock
Min.Order
LD56100DPU28R Active
Part Number:
LD56100DPU28R
Operating Temperature (°C)
Min:
Max:
Grade:
Industrial
Output Voltage (V) (nom):
2.8
Output Tolerance (typ):
1
Output Current (A) (nom):
1
MOUSER
Stock
5977Min.Order
1DIGIKEY
Stock
1248Min.Order
1Distributor reported inventory date: 4/26/2025
Stock
Min.Order
LD56100DPU15R Preview
Part Number:
LD56100DPU15R
Operating Temperature (°C)
Min:
Max:
Grade:
Industrial
Output Voltage (V) (nom):
1.5
Output Tolerance (typ):
1
Output Current (A) (nom):
1
Distributor reported inventory date:
Stock
Min.Order
LD56100DPU33R Active
Part Number:
LD56100DPU33R
Operating Temperature (°C)
Min:
Max:
Grade:
Industrial
Output Voltage (V) (nom):
3.3
Output Tolerance (typ):
1
Output Current (A) (nom):
1
MOUSER
Stock
7372Min.Order
1AVNET
Stock
3000Min.Order
0DIGIKEY
Stock
31781Min.Order
1YOSUN
Stock
200Min.Order
1Distributor reported inventory date: 4/27/2025
Stock
Min.Order
LD56100DPU30R Active
Part Number:
LD56100DPU30R
Operating Temperature (°C)
Min:
Max:
Grade:
Industrial
Output Voltage (V) (nom):
3
Output Tolerance (typ):
1
Output Current (A) (nom):
1
Farnell Element14
Stock
4510Min.Order
1MOUSER
Stock
2790Min.Order
1DIGIKEY
Stock
2552Min.Order
1Distributor reported inventory date: 4/26/2025
Stock
Min.Order
LD56100DPU25R Active
Part Number:
LD56100DPU25R
Operating Temperature (°C)
Min:
Max:
Grade:
Industrial
Output Voltage (V) (nom):
-
Output Tolerance (typ):
1
Output Current (A) (nom):
1
MOUSER
Stock
2870Min.Order
1AVNET
Stock
24000Min.Order
0Distributor reported inventory date: 4/26/2025
Stock
Min.Order
(*) 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