REG103UA-3Alternatives & Equivalent Parts
About REG103UA-3
REG103UA-3 is a Integrated Circuit component manufactured by Texas Instruments. It comes in a Small Outline Packages package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
Specification Comparison
| Parameter | REG103UA-3Source | REG103UA-3/2K5G4 | REG103GA-3.3 | REG103GA-5 | TPA122D | REG103UA-5 | REG103UA-5G4 |
|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package Type | Small Outline Packages | Small Outline Packages | SOT223 (5-Pin) | — | Small Outline Packages | Small Outline Packages | Small Outline Packages |
| Pin Count | 8 | 8 | 6 | — | 8 | 8 | 8 |
| Temperature Range | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | — | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C |
| Price | $2.1100 | $2.1100 | $3.1275 | $3.8900 | $0.7440 | $2.1840 | — |
| Electrical Parameters | |||||||
| YTEOL | 0 | 0 | 15 | — | 15 | 15 | 0 |
| Adjustability | FIXED | FIXED | FIXED | — | — | FIXED | FIXED |
| Dropout Voltage1-Max | 0.2 V | 0.2 V | 0.2 V | — | — | 0.25 V | 0.25 V |
| Dropout Voltage1-Nom | 0.115 V | 0.115 V | 0.115 V | — | — | 0.115 V | 0.16 V |
| Input Voltage Absolute-Max | 16 V | 16 V | 16 V | — | — | 16 V | 16 V |
| Input Voltage-Max | 15 V | 15 V | 15 V | — | — | 15 V | 15 V |
| Input Voltage-Min | 3.2 V | 3.9 V | 3.5 V | — | — | 5.25 V | 5.25 V |
| JESD-30 Code | R-PDSO-G8 | R-PDSO-G8 | R-PDSO-G6 | — | R-PDSO-G8 | R-PDSO-G8 | R-PDSO-G8 |
| JESD-609 Code | e4 | — | e4 | — | e4 | e4 | e4 |
| Line Regulation-Max | 0.105% | 0.105% | 0.115% | — | — | 0.175% | 0.16% |
| Load Regulation-Max | 0.105% | 0.105% | 0.115% | — | — | 0.175% | 0.175% |
| Number of Functions | 1 | 1 | 1 | — | 1 | 1 | 1 |
| Number of Outputs | 1 | 1 | 1 | — | — | 1 | 1 |
| Operating Temperature TJ-Max | 125 °C | 85 °C | 125 °C | — | — | 125 °C | 125 °C |
| Operating Temperature TJ-Min | -55 °C | -40 °C | -55 °C | — | — | -55 °C | -55 °C |
| Output Current1-Max | 0.5 A | 0.5 A | 0.5 A | — | — | 0.5 A | 0.5 A |
| Output Voltage1-Max | 3.06 V | 3.06 V | 3.366 V | — | — | 5.1 V | 5.1 V |
| Output Voltage1-Min | 2.94 V | 2.94 V | 3.234 V | — | — | 4.9 V | 4.9 V |
| Output Voltage1-Nom | 3 V | 3 V | 3.3 V | — | — | 5 V | 5 V |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | — | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 | SOP8,.25 | SOT-223-5 | — | SOP8,.25 | SOP8,.25 | SOP8,.25 |
| Package Shape | RECTANGULAR | RECTANGULAR | RECTANGULAR | — | RECTANGULAR | RECTANGULAR | RECTANGULAR |
| Package Style | SMALL OUTLINE | SMALL OUTLINE | SMALL OUTLINE | — | SMALL OUTLINE | SMALL OUTLINE | SMALL OUTLINE |
| Packing Method | RAIL | TR | TUBE | — | — | TUBE | RAIL |
| Peak Reflow Temperature (Cel) | 260 | NOT SPECIFIED | 260 | — | 260 | 260 | 260 |
| Qualification Status | Not Qualified | Not Qualified | Not Qualified | — | Not Qualified | Not Qualified | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | — | — | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES | YES | YES | — | YES | YES | YES |
| Technology | NMOS | NMOS | NMOS | — | CMOS | NMOS | NMOS |
| Terminal Finish | NICKEL PALLADIUM GOLD | — | Nickel/Palladium/Gold (Ni/Pd/Au) | — | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING | GULL WING | GULL WING | — | GULL WING | GULL WING | GULL WING |
| Terminal Pitch | 1.27 mm | 1.27 mm | 1.27 mm | — | 1.27 mm | 1.27 mm | 1.27 mm |
| Terminal Position | DUAL | DUAL | DUAL | — | DUAL | DUAL | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 | NOT SPECIFIED | 30 | — | 30 | 30 | 30 |
| Voltage Tolerance-Max | 2.8% | 2.8% | 2.8% | — | — | 2.8% | 2.8% |
| ## REG103UA-3 Alternates Showing results | Image | — | — | — | — | — | — |
| Pbfree Code | — | — | Yes | — | Yes | Yes | — |
| ## REG103GA-3.3 Alternates Showing results | — | — | Image | — | — | — | — |
| Bandwidth-Nom | — | — | — | — | 20 kHz | — | — |
| Consumer IC Type | — | — | — | — | AUDIO AMPLIFIER | — | — |
| Harmonic Distortion | — | — | — | — | 0.1% | — | — |
| Number of Channels | — | — | — | — | 2 | — | — |
| Output Power-Nom | — | — | — | — | 0.15 W | — | — |
| Supply Current-Max | — | — | — | — | 3 mA | — | — |
| Supply Voltage-Max (Vsup) | — | — | — | — | 5.5 V | — | — |
| Supply Voltage-Min (Vsup) | — | — | — | — | 2.5 V | — | — |
| Temperature Grade | — | — | — | — | INDUSTRIAL | — | — |
| ## TPA122D Alternates Showing results | — | — | — | — | Image | — | — |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Quick Links
Why Look for Alternatives?
Finding alternatives for REG103UA-3 is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating REG103UA-3 replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
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What is equivalent to REG103UA-3?
Known equivalents for REG103UA-3 include REG103UA-3/2K5G4, REG103GA-3.3, REG103GA-5. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of REG103UA-3?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify REG103UA-3 alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.