Specifications
| Type | Description |
|---|---|
| Part Number | LM4140 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package Case | 8-pin SOIC (D), body size 4.90 mm x 3.91 mm |
| Component Type | Power_IC |
| Initial Output Voltage Accuracy | ±0.1%; all versions |
| Temperature Coefficient | 3 ppm/°C; A grade, 0°C ≤ TA ≤ 70°C |
| Temperature Coefficient | 6 ppm/°C; B grade, 0°C ≤ TA ≤ 70°C |
| Temperature Coefficient | 10 ppm/°C; C grade, 0°C ≤ TA ≤ 70°C |
| Line Regulation | 50 typ, 300 max ppm/V; 1.024-V and 1.25-V options, 1.8 V ≤ VIN ≤ 5.5 V, TA=25°C |
| Line Regulation | 350 max ppm/V; 1.024-V and 1.25-V options, 1.8 V ≤ VIN ≤ 5.5 V, 0°C ≤ TA ≤ 70°C |
| Line Regulation | 20 typ, 200 max ppm/V; all other voltage options, VREF+200 mV ≤ VIN ≤ 5.5 V, TA=25°C |
| Line Regulation | 250 max ppm/V; all other voltage options, VREF+200 mV ≤ VIN ≤ 5.5 V, 0°C ≤ TA ≤ 70°C |
| Load Regulation | 1 typ, 20 max ppm/mA; all other voltage options, 1 mA ≤ ILOAD ≤ 8 mA, TA=25°C |
| Load Regulation | 150 max ppm/mA; all other voltage options, 1 mA ≤ ILOAD ≤ 8 mA, 0°C ≤ TA ≤ 70°C |
| Load Regulation | 5 typ, 35 max ppm/mA; 4.096-V option, 1 mA ≤ ILOAD ≤ 8 mA, TA=25°C |
| Load Regulation | 150 max ppm/mA; 4.096-V option, 1 mA ≤ ILOAD ≤ 8 mA, 0°C ≤ TA ≤ 70°C |
| Long-Term Stability | 60 ppm; 1000 hours |
| Thermal Hysteresis | 20 ppm; 0°C ≤ TA ≤ 70°C |
| Operating Voltage | 1.8 min, 5.5 max V; 1.024-V and 1.25-V options, IL=1 mA to 8 mA, 0°C ≤ TA ≤ 70°C |
| Dropout Voltage | 20 typ, 40 max mV; 2.048-V and 2.5-V options, IL=1 mA, TA=25°C |
| Dropout Voltage | 45 max mV; 2.048-V and 2.5-V options, IL=1 mA, 0°C ≤ TA ≤ 70°C |
| Dropout Voltage | 160 typ, 235 max mV; 2.048-V and 2.5-V options, IL=8 mA, TA=25°C |
| Dropout Voltage | 400 max mV; 2.048-V and 2.5-V options, IL=8 mA, 0°C ≤ TA ≤ 70°C |
| Dropout Voltage | 20 typ, 40 max mV; 4.096-V option, IL=1 mA, TA=25°C |
| Dropout Voltage | 45 max mV; 4.096-V option, IL=1 mA, 0°C ≤ TA ≤ 70°C |
| Dropout Voltage | 195 typ, 270 max mV; 4.096-V option, IL=8 mA, TA=25°C |
| Dropout Voltage | 490 max mV; 4.096-V option, IL=8 mA, 0°C ≤ TA ≤ 70°C |
| Output Noise Voltage | 2.2 µVPP; 0.1 Hz to 10 Hz, based on 1.024-V option; noise linearly proportional to VREF |
| Supply Current On | 230 typ, 320 max µA; all other voltage options, ILOAD=0 mA, TA=25°C |
| Supply Current On | 375 max µA; all other voltage options, ILOAD=0 mA, 0°C ≤ TA ≤ 70°C |
| Supply Current On | 265 typ, 350 max µA; 4.096-V option, ILOAD=0 mA, TA=25°C |
| Supply Current On | 400 max µA; 4.096-V option, ILOAD=0 mA, 0°C ≤ TA ≤ 70°C |
| Supply Current Off | 0.01 typ µA; VEnable < 0.4 V, TA=25°C |
| Supply Current Off | 1 max µA; VEnable < 0.4 V, 0°C ≤ TA ≤ 70°C |
| Logic High Input Voltage | 0.8 x VIN V; 0°C ≤ TA ≤ 70°C |
| Logic High Input Current | 2 nA; enable input high |
| Logic Low Input Voltage | 0.4 V; 0°C ≤ TA ≤ 70°C |
| Logic Low Input Current | 1 nA; enable input low |
| Short-Circuit Current | 8.5 min, 20 typ, 35 max mA; TA=25°C |
| Short-Circuit Current | 40 max mA; 0°C ≤ TA ≤ 70°C |
| Output Voltage Options | 1.024 V, 1.25 V, 2.048 V, 2.5 V, 4.096 V; standard LM4140 output options |
| Custom Output Voltage Range | 0.5 V to 4.5 V; contact Texas Instruments for other output voltage options |
| Output Current Capability | Up to 8 mA source; VREF pin capability |
| Required Output Capacitor | 1 µF; between output pin and GND for proper operation |
| Enable Pin Function | Pulled to input for normal operation; forcing to ground turns off output; Pin 3 Enable |
| Enable Pin Requirement | Must be tied to VIN if unused; must not be left floating; ON/OFF operation |
| Turn-On Recovery Time | Less than 200 µs; VREF restored when turned on |
| Absolute Maximum Input Pin Voltage | -0.3 min, 5.6 max V; maximum voltage on any input pin |
| Output Short-Circuit Duration | Indefinite; absolute maximum ratings |
| Power Dissipation | 345 mW; TA=25°C, without PCB copper enhancements |
| Storage Temperature | -65 min, 150 max °C; absolute maximum ratings |
| ESD Rating HBM | ±2000 V; human-body model per ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±200 V; charged-device model per JEDEC JESD22-C101 |
| Ambient Operating Temperature | 0 min, 70 max °C; recommended operating conditions |
| Junction Operating Temperature | 0 min, 80 max °C; recommended operating conditions |
| Junction-to-Ambient Thermal Resistance | 119.3 °C/W; 8-pin SOIC D package |
| Junction-to-Case Top Thermal Resistance | 52.3 °C/W; 8-pin SOIC D package |
| Junction-to-Board Thermal Resistance | 60.3 °C/W; 8-pin SOIC D package |
| Junction-to-Top Characterization Parameter | 14.5 °C/W; 8-pin SOIC D package |
| Junction-to-Board Characterization Parameter | 59.7 °C/W; 8-pin SOIC D package |
| Package Pins | 8 pins; SOIC D package |
| VIN Pin | Pin 2; positive supply input |
| VREF Pin | Pin 6; reference output |
| Ground Pins | Pins 1, 4, 7, 8; negative supply or ground connection; must be connected to ground |
| NC Pin | Pin 5; must be left open |
| Datasheet Status | request_only |
Product Overview
The LM4140 is a Texas Instruments precision low-dropout voltage reference for Power_Management designs that require defined reference outputs. The device is offered with standard output voltages of 1.024 V, 1.25 V, 2.048 V, 2.5 V, and 4.096 V, and Texas Instruments identifies a custom output voltage range from 0.5 V to 4.5 V for other options.
Key Features
- ±0.1% initial output voltage accuracy across all versions
- 3 ppm/°C A-grade temperature coefficient over 0°C to 70°C
- Standard outputs: 1.024 V, 1.25 V, 2.048 V, 2.5 V, 4.096 V
- Custom output voltage range from 0.5 V to 4.5 V
- Up to 8 mA source capability from VREF
- Enable pin supports output shutoff by forcing ground
- Less than 200 µs turn-on recovery time
- 1 µF output capacitor required for proper operation
- 2.2 µVPP output noise from 0.1 Hz to 10 Hz
- Indefinite output short-circuit duration rating
Typical Applications
- Precision voltage reference rails
- Low-dropout reference outputs
- Enable-controlled reference circuits
- Power-management reference nodes
- 8 mA source reference outputs
- Temperature-graded reference designs
- SOIC-based board assemblies
Procurement Notes
When requesting a quote for LM4140, 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 output voltage options are specified for LM4140?
The LM4140 standard output voltage options are 1.024 V, 1.25 V, 2.048 V, 2.5 V, and 4.096 V. Texas Instruments also identifies custom output voltage options from 0.5 V to 4.5 V by contact request.
What capacitor is required on the LM4140 output?
A 1 µF capacitor is required between the output pin and ground for proper operation. The extracted facts identify this requirement specifically for the output pin and GND connection.
How should the LM4140 enable pin be connected?
The enable pin is pulled to input for normal operation, and forcing it to ground turns off the output. If the enable function is unused, the pin must be tied to VIN and must not be left floating.
What package and pin assignments are listed for LM4140?
The LM4140 is listed in an 8-pin SOIC (D) package with a 4.90 mm x 3.91 mm body. VIN is pin 2, VREF is pin 6, grounds are pins 1, 4, 7, and 8, and pin 5 is NC.
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.