Specifications
| Type | Description |
|---|---|
| Part Number | LM4120 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | SOT-23 (DBV), 5 pins, 1.60 mm x 2.90 mm nominal body |
| Component Type | Power_IC |
| Output Voltage Options - Fixed output voltage versions | 1.8 V, 2.048 V, 2.5 V, 3.0 V, 3.3 V, 4.096 V, 5.0 V |
| Output Current Capability - Source and sink current output capability | ±5 mA |
| Input Voltage Range - Series reference operating range | 2 V to 12 V |
| Supply Current - Normal operation | 160 µA typ |
| Power-Down Supply Current - Power-down mode | <2 µA |
| Initial Accuracy - A grade devices | ±0.2% |
| Initial Accuracy - Standard grade devices | ±0.5% |
| Temperature Coefficient - Ensured from -40°C to 125°C | 50 ppm/°C max |
| Industrial Ambient Temperature Range - Device performance ensured | -40°C to 85°C |
| Extended Temperature Range - Certain specifications ensured; contact TI for full specifications | -40°C to 125°C |
| Enable Pin Function - Enable pin, pin 3 | Pulled to input for normal operation; forcing to ground turns off output |
| Pin 1 Function - REF pin | REF pin must be left unconnected |
| Pin 2 Function - GND pin | Negative supply or ground connection |
| Pin 4 Function - VIN pin | Positive supply |
| Pin 5 Function - VOUT pin | Reference output |
| Absolute Maximum Input or Enable Voltage - Over operating free-air temperature range | -0.3 V to 14 V |
| Output Short-Circuit Duration - Absolute maximum ratings | Indefinite |
| Power Dissipation - TA=25°C, without PCB copper enhancements | 350 mW max |
| Soldering Lead Temperature - 10 seconds | 260°C max |
| Storage Temperature - Tstg | -65°C to 150°C |
| ESD Rating HBM - ANSI/ESDA/JEDEC JS-001 | ±2000 V |
| ESD Rating CDM - JEDEC JESD22-C101 | ±750 V |
| ESD Rating Machine Model - Machine Model | ±200 V |
| Recommended Ambient Temperature - Recommended operating conditions | -40°C min, 85°C max |
| Recommended Junction Temperature - Recommended operating conditions | -40°C min, 125°C max |
| Junction-to-Ambient Thermal Resistance - DBV SOT-23, 5 pins | 170.4°C/W |
| Junction-to-Case Top Thermal Resistance - DBV SOT-23, 5 pins | 123.9°C/W |
| Junction-to-Board Thermal Resistance - DBV SOT-23, 5 pins | 30.4°C/W |
| Junction-to-Top Characterization Parameter - DBV SOT-23, 5 pins | 17.2°C/W |
| Junction-to-Board Characterization Parameter - DBV SOT-23, 5 pins | 29.9°C/W |
| Electrical Test Conditions - Unless otherwise specified | VIN=3.3 V, ILOAD=0, COUT=0.01 µF, TA=TJ=25°C |
| Output Voltage Initial Accuracy - LM4120A-1.800, LM4120A-2.048, LM4120A-2.500 | ±0.2% |
| Output Voltage Initial Accuracy - LM4120-1.800, LM4120-2.048, LM4120-2.500 | ±0.5% |
| Temperature Coefficient - 1.8 V, 2.048 V, 2.5 V options; -40°C ≤ TA ≤ 125°C | 14 ppm/°C typ, 50 ppm/°C max |
| Line Regulation - 1.8 V, 2.048 V, 2.5 V options; 3.3 V ≤ VIN ≤ 12 V; -40°C ≤ TA ≤ 85°C for temperature limit | 0.0007%/V typ, 0.008%/V max, 0.01%/V max over temperature |
| Load Regulation - 1.8 V, 2.048 V, 2.5 V options; 0 mA ≤ ILOAD ≤ 1 mA; -40°C ≤ TA ≤ 85°C for temperature limit | 0.03%/mA typ, 0.08%/mA max, 0.17%/mA max over temperature |
| Load Regulation - 1.8 V, 2.048 V, 2.5 V options; 1 mA ≤ ILOAD ≤ 5 mA; -40°C ≤ TA ≤ 85°C for temperature limit | 0.01%/mA typ, 0.04%/mA max, 0.1%/mA max over temperature |
| Load Regulation - 1.8 V, 2.048 V, 2.5 V options; -1 mA ≤ ILOAD ≤ 0 mA | 0.04%/mA typ, 0.12%/mA max |
| Load Regulation - 1.8 V, 2.048 V, 2.5 V options; -5 mA ≤ ILOAD ≤ -1 mA | 0.01%/mA typ |
| Dropout Voltage - 1.8 V, 2.048 V, 2.5 V options; ILOAD=0 mA; -40°C ≤ TA ≤ 85°C for temperature limit | 45 mV typ, 65 mV max, 80 mV max over temperature |
| Dropout Voltage - 1.8 V, 2.048 V, 2.5 V options; ILOAD=1 mA; -40°C ≤ TA ≤ 85°C for temperature limit | 120 mV typ, 150 mV max, 180 mV max over temperature |
| Dropout Voltage - 1.8 V, 2.048 V, 2.5 V options; ILOAD=5 mA; -40°C ≤ TA ≤ 85°C for temperature limit | 180 mV typ, 210 mV max, 250 mV max over temperature |
| Output Noise Voltage - 0.1 Hz to 10 Hz | 20 µVPP |
| Output Noise Voltage - 10 Hz to 10 kHz | 36 µVPP |
| Supply Current - -40°C ≤ TA ≤ 85°C for temperature limit | 160 µA typ, 250 µA max, 275 µA max over temperature |
| Power-Down Supply Current - Enable=0.4 V; -40°C ≤ TA ≤ 85°C for max limit | 1 µA typ, 2 µA max |
| Logic High Input Voltage - Enable input; -40°C ≤ TA ≤ 85°C | 2.4 V min |
| Logic Low Input Voltage - Enable input; -40°C ≤ TA ≤ 85°C for temperature limit | 0.4 V max at 25°C, 0.2 V max over temperature |
| Logic High Input Current - Enable input; -40°C ≤ TA ≤ 85°C for max limit | 7 µA typ, 15 µA max |
| Logic Low Input Current - Enable input low | 0.1 µA typ |
| Short-Circuit Current - VIN=3.3 V, VOUT=0 V; -40°C ≤ TA ≤ 85°C for min/max limits | 15 mA typ, 6 mA min, 30 mA max over temperature |
| Short-Circuit Current - VIN=12 V, VOUT=0 V; -40°C ≤ TA ≤ 85°C for min/max limits | 17 mA typ, 6 mA min, 30 mA max over temperature |
| Thermal Hysteresis - -40°C ≤ TA ≤ 125°C | 0.5 mV/V |
| Long-Term Stability - 1000 hours at 25°C | 100 ppm |
| Output Voltage Initial Accuracy - LM4120A-3.000, LM4120A-3.300, LM4120A-4.096, LM4120A-5.000 | ±0.2% |
| Output Voltage Initial Accuracy - LM4120-3.000, LM4120-3.300, LM4120-4.096, LM4120-5.000 | ±0.5% |
| Line Regulation - 3 V, 3.3 V, 4.096 V, 5 V options; VOUT+1 V ≤ VIN ≤ 12 V; -40°C ≤ TA ≤ 85°C for temperature limit | 0.0007%/V typ, 0.008%/V max, 0.01%/V max over temperature |
| Output Noise Scaling - Example: VN(2.5 V) = 46 µVPP for 10 Hz to 10 kHz | VN for other voltage options = (VN at 1.8 V / 1.8) x VOUT |
| Datasheet Status | request_only |
Product Overview
The LM4120 is a Texas Instruments precision micropower voltage reference in the Power_Management category. It is a series reference with fixed output voltage options of 1.8 V, 2.048 V, 2.5 V, 3.0 V, 3.3 V, 4.096 V, and 5.0 V. The input operating range is 2 V to 12 V, and the output can source or sink ±5 mA.
The device is supplied in a DBV SOT-23, 5-pin package with a nominal 1.60 mm x 2.90 mm body. Pin 1 is REF and must be left unconnected, pin 2 is GND, pin 3 is ENABLE, pin 4 is VIN, and pin 5 is VOUT. The enable pin is pulled to input for normal operation, and forcing it to ground turns off the output.
Electrical data includes 160 µA typical supply current, 1 µA typical power-down current at ENABLE = 0.4 V, 14 ppm/°C typical temperature coefficient for 1.8 V, 2.048 V, and 2.5 V options, and 20 µVPP output noise from 0.1 Hz to 10 Hz. Assembly and limit data include 350 mW maximum power dissipation at TA = 25°C without PCB copper enhancements and 260°C maximum soldering lead temperature for 10 seconds.
Key Features
- Fixed outputs from 1.8 V to 5.0 V
- Series reference input range of 2 V to 12 V
- Sources and sinks up to ±5 mA output current
- 160 µA typical supply current in normal operation
- Power-down supply current below 2 µA
- A grade initial accuracy of ±0.2%
- Standard grade initial accuracy of ±0.5%
- 50 ppm/°C maximum temperature coefficient
- Enable pin turns output off when grounded
- SOT-23 DBV 5-pin package body
Typical Applications
- Fixed precision reference nodes
- Low-power reference rails
- Enable-controlled reference outputs
- Source and sink reference loads
- Compact SOT-23 power designs
- Temperature-specified reference circuits
Procurement Notes
When requesting a quote for LM4120, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What fixed output voltages are available for the LM4120?
The LM4120 fixed output voltage versions include 1.8 V, 2.048 V, 2.5 V, 3.0 V, 3.3 V, 4.096 V, and 5.0 V, according to the extracted datasheet facts.
What input range and output current does LM4120 support?
The LM4120 operates as a series reference over a 2 V to 12 V input range and has source and sink output current capability of ±5 mA.
How does the LM4120 enable pin operate?
The enable pin is pin 3. It is pulled to the input for normal operation, and forcing the enable pin to ground turns off the output.
What package is specified for this LM4120 content?
The specified package is DBV SOT-23 with 5 pins and a nominal body size of 1.60 mm x 2.90 mm.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 25, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.