Specifications
| Type | Description |
|---|---|
| Part Number | LM1117 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package Case | DCY (SOT-223, 4) 6.50 mm x 3.50 mm; NDE (TO-220, 3) 14.986 mm x 10.16 mm; NDP (TO-252, 3) 6.58 mm x 6.10 mm; NGN (WSON, 8) 4.00 mm x 4.00 mm; KTT (TO-263, 3) 10.18 mm x 8.41 mm |
| Output Current | 800 mA |
| Dropout Voltage | 1.2 V |
| Available Fixed Output Voltages | 1.8 V, 2.5 V, 3.3 V, 5 V |
| Adjustable Output Voltage Range | 1.25 V to 13.8 V |
| Line Regulation | 0.2% max |
| Load Regulation | 0.4% max |
| Output Voltage Accuracy | ±1% |
| Required Output Capacitor | 10 uF minimum tantalum |
| Protection Features | Current limiting and thermal shutdown |
| LM1117 Operating Temperature Range | 0°C to +125°C |
| LM1117I Operating Temperature Range | -40°C to +125°C |
| Recommended Input Voltage | 15 V max |
| Absolute Maximum Input Voltage | 20 V max |
| Power Dissipation | Internally limited |
| Junction Temperature Absolute Maximum | 150°C max |
| Storage Temperature | -65°C to 150°C |
| ESD Rating HBM | ±2000 V |
| Thermal Resistance RthetaJA, SOT-223 | 61.6°C/W |
| Thermal Resistance RthetaJA, TO-220 | 23.8°C/W |
| Thermal Resistance RthetaJA, TO-252 | 45.1°C/W |
| Thermal Resistance RthetaJA, WSON | 39.3°C/W |
| Thermal Resistance RthetaJA, TO-263 | 41.3°C/W |
| LM1117-ADJ Reference Voltage | 1.238 V min, 1.25 V typ, 1.262 V max |
| LM1117-ADJ Reference Voltage Over Temperature | 1.225 V min, 1.27 V max |
| LM1117-1.8 Output Voltage | 1.782 V min, 1.8 V typ, 1.818 V max |
| LM1117-1.8 Output Voltage Over Temperature | 1.746 V min, 1.854 V max |
| LM1117-2.5 Output Voltage | 2.475 V min, 2.5 V typ, 2.525 V max |
| LM1117-2.5 Output Voltage Over Temperature | 2.45 V min, 2.55 V max |
| LM1117-3.3 Output Voltage | 3.267 V min, 3.3 V typ, 3.333 V max |
| LM1117-3.3 Output Voltage Over Temperature | 3.235 V min, 3.365 V max |
| LM1117-5.0 Output Voltage | 4.95 V min, 5 V typ, 5.05 V max |
| LM1117-5.0 Output Voltage Over Temperature | 4.9 V min, 5.1 V max |
| LM1117-ADJ Line Regulation | 0.035% typ at TJ=25°C, 0.2% max over temperature |
| LM1117-1.8 Line Regulation | 1 mV typ at TJ=25°C, 6 mV max over temperature |
| LM1117-2.5 Line Regulation | 1 mV typ at TJ=25°C, 6 mV max over temperature |
| LM1117-3.3 Line Regulation | 1 mV typ at TJ=25°C, 6 mV max over temperature |
| LM1117-5.0 Line Regulation | 1 mV typ at TJ=25°C, 10 mV max over temperature |
| LM1117-ADJ Load Regulation | 0.2% typ at TJ=25°C, 0.4% max over temperature |
| LM1117 Fixed Load Regulation | 1 mV typ at TJ=25°C; 10 mV max for 1.8 V, 2.5 V, 3.3 V; 15 mV max for 5.0 V |
| Dropout Voltage at 100 mA | 1.1 V typ at TJ=25°C, 1.2 V max over temperature |
| Dropout Voltage at 500 mA | 1.15 V typ at TJ=25°C, 1.25 V max over temperature |
| Dropout Voltage at 800 mA | 1.2 V typ at TJ=25°C, 1.3 V max over temperature |
| Current Limit | 800 mA min, 1200 mA typ, 1500 mA max |
| LM1117-ADJ Minimum Load Current | 1.7 mA typ at TJ=25°C, 5 mA max over temperature |
| Fixed-Version Quiescent Current | 5 mA typ at TJ=25°C, 10 mA max over temperature |
| Thermal Regulation | 0.01%/W typ, 0.1%/W max |
| Ripple Rejection | 75 dB typ at TJ=25°C, 60 dB min over temperature |
| Adjust Pin Current | 60 uA typ at TJ=25°C, 120 uA max over temperature |
| Adjust Pin Current Change | 0.2 uA typ at TJ=25°C, 5 uA max over temperature |
| Temperature Stability | 0.5% |
| Long-Term Stability | 0.3% |
| RMS Output Noise | 0.003% of VOUT |
| Pin 1 Function | ADJ/GND |
| VIN Pin Function | Input voltage pin |
| VOUT Pin Function | Output voltage pin |
| WSON Pin Connection Requirement | Pins 2, 3, and 4 connected together; pins 5, 6, and 7 connected together |
| LM1117I-ADJ Reference Voltage | 1.238 V min, 1.25 V typ, 1.262 V max |
| LM1117I-ADJ Reference Voltage Over Temperature | 1.2 V min, 1.29 V max |
| LM1117I-3.3 Output Voltage | 3.267 V min, 3.3 V typ, 3.333 V max |
| LM1117I-3.3 Output Voltage Over Temperature | 3.168 V min, 3.432 V max |
| LM1117I-5.0 Output Voltage | 4.95 V min, 5 V typ, 5.05 V max |
| LM1117I-5.0 Output Voltage Over Temperature | 4.8 V min, 5.2 V max |
| LM1117I-ADJ Line Regulation | 0.035% typ at TJ=25°C, 0.3% max over temperature |
| LM1117I-3.3 Line Regulation | 1 mV typ at TJ=25°C, 10 mV max over temperature |
| Datasheet Status | request_only |
Product Overview
The LM1117 is a Texas Instruments 800-mA low-dropout linear regulator in the Power_Management category. It provides fixed output options of 1.8 V, 2.5 V, 3.3 V, and 5 V, while the adjustable version covers 1.25 V to 13.8 V using two external resistors. A zener-trimmed band-gap reference supports ±1% output voltage accuracy.
Electrical limits include 800 mA rated output current, 1.2 V dropout at 800 mA, 0.2% maximum line regulation, and 0.4% maximum load regulation. The recommended VIN-to-GND maximum is 15 V, with an absolute maximum input voltage of 20 V. Protection functions include current limiting and thermal shutdown, and power dissipation is internally limited.
The device is available in SOT-223, TO-220, TO-252, WSON, and TO-263 packages. The output requires a 10 uF minimum tantalum capacitor for transient response and stability. Pin functions include ADJ/GND on pin 1, VIN as the input voltage pin, and VOUT as the output voltage pin; the WSON package requires grouped VIN and VOUT pin connections.
Key Features
- 800 mA rated output current
- 1.2 V dropout at 800 mA load
- Fixed 1.8 V, 2.5 V, 3.3 V, 5 V outputs
- Adjustable output from 1.25 V to 13.8 V
- 0.2% maximum line regulation
- 0.4% maximum load regulation
- ±1% output voltage accuracy
- 10 uF minimum tantalum output capacitor required
- Current limiting and thermal shutdown protection
- 15 V maximum recommended input voltage
- 60 dB minimum ripple rejection over temperature
- SOT-223, TO-220, TO-252, WSON, TO-263 packages
Typical Applications
- 800 mA regulated power rails
- Fixed 1.8 V supply rails
- Fixed 2.5 V supply rails
- Fixed 3.3 V supply rails
- Fixed 5 V supply rails
- Adjustable linear regulation
- Low-dropout voltage regulation
- Ripple-sensitive regulated outputs
- Thermally protected power regulation
Procurement Notes
When requesting a quote for LM1117, 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 current does the LM1117 support?
The LM1117 is rated for 800 mA output current. The datasheet also lists current limit at 800 mA minimum, 1200 mA typical, and 1500 mA maximum with VIN-VOUT equal to 5 V at TJ=25°C.
Which fixed output voltages are available for LM1117?
The fixed-output LM1117 versions listed in the extracted datasheet facts are 1.8 V, 2.5 V, 3.3 V, and 5 V. The adjustable version covers 1.25 V to 13.8 V using two external resistors.
What capacitor is required at the LM1117 output?
The extracted datasheet facts specify a 10 uF minimum tantalum capacitor at the output. This capacitor is required for transient response and stability, so it is part of the regulator's external component requirements.
What protection functions are included in LM1117?
The LM1117 includes current limiting and thermal shutdown. The absolute maximum ratings also state that power dissipation is internally limited, with a maximum junction temperature rating of 150°C.
What packages are listed for the LM1117?
The listed package options are DCY SOT-223, NDE TO-220, NDP TO-252, NGN WSON, and KTT TO-263. The extracted facts include package dimensions and RthetaJA values for each package.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 20, 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.