Part Details for L4940D2T85-TR by STMicroelectronics
Results Overview of L4940D2T85-TR by STMicroelectronics
- Distributor Offerings: (0 listings)
- Number of FFF Equivalents: (1 replacement)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (2 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
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L4940D2T85-TR Information
L4940D2T85-TR by STMicroelectronics is a Linear Regulator IC.
Linear Regulator ICs are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
Part Details for L4940D2T85-TR
L4940D2T85-TR CAD Models
L4940D2T85-TR Part Data Attributes
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L4940D2T85-TR
STMicroelectronics
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Datasheet
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L4940D2T85-TR
STMicroelectronics
8.5V FIXED POSITIVE LDO REGULATOR, 0.9V DROPOUT, PSSO2, LEAD FREE, D2PAK-3
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| Rohs Code | Yes | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | STMICROELECTRONICS | |
| Part Package Code | D2PAK | |
| Package Description | LEAD FREE, D2PAK-3 | |
| Pin Count | 3 | |
| Reach Compliance Code | not_compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Adjustability | FIXED | |
| Dropout Voltage1-Max | 0.9 V | |
| Dropout Voltage1-Nom | 0.5 V | |
| Input Voltage Absolute-Max | 30 V | |
| Input Voltage-Max | 17 V | |
| Input Voltage-Min | 9.5 V | |
| JESD-30 Code | R-PSSO-G2 | |
| JESD-609 Code | e3 | |
| Length | 10.2 mm | |
| Line Regulation-Max | 0.009% | |
| Load Regulation-Max | 0.03% | |
| Moisture Sensitivity Level | 1 | |
| Number of Functions | 1 | |
| Number of Outputs | 1 | |
| Number of Terminals | 2 | |
| Operating Temperature TJ-Max | 150 °C | |
| Operating Temperature TJ-Min | -40 °C | |
| Output Current1-Max | 1.5 A | |
| Output Voltage1-Max | 8.85 V | |
| Output Voltage1-Min | 8.15 V | |
| Output Voltage1-Nom | 8.5 V | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Code | TO-263 | |
| Package Equivalence Code | SMSIP3H,.55TB | |
| Package Shape | RECTANGULAR | |
| Package Style | SMALL OUTLINE | |
| Packing Method | TR | |
| Peak Reflow Temperature (Cel) | 245 | |
| Qualification Status | Not Qualified | |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | |
| Seated Height-Max | 4.83 mm | |
| Surface Mount | YES | |
| Technology | BIPOLAR | |
| Terminal Finish | Matte Tin (Sn) | |
| Terminal Form | GULL WING | |
| Terminal Pitch | 2.54 mm | |
| Terminal Position | SINGLE | |
| Time@Peak Reflow Temperature-Max (s) | 30 | |
| Voltage Tolerance-Max | 4.1% | |
| Width | 9.15 mm |
Alternate Parts for L4940D2T85-TR
This table gives cross-reference parts and alternative options found for L4940D2T85-TR. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of L4940D2T85-TR, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| L4940D2M85 | STMicroelectronics | Check for Price | 8.5V FIXED POSITIVE LDO REGULATOR, 0.9V DROPOUT, PSSO3, D2PAK/A-3 | L4940D2T85-TR vs L4940D2M85 |
L4940D2T85-TR Frequently Asked Questions (FAQ)
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STMicroelectronics provides a recommended PCB layout in the application note AN1026, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
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To ensure stable output voltage regulation, it's essential to follow the recommended input capacitor selection and placement guidelines in the datasheet. Additionally, consider using a voltage supervisor or a power-on reset circuit to ensure the regulator is properly biased during power-up and power-down sequences.
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While the datasheet doesn't specify a maximum allowable ripple voltage, a general rule of thumb is to keep the input capacitor ripple voltage below 10% of the input voltage to ensure stable operation and minimize noise coupling to the output.
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The L4940D2T85-TR is rated for operation up to 125°C, but it's essential to consider the thermal derating curves in the datasheet to ensure the device can handle the expected power dissipation and ambient temperature in your specific application.
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To protect the L4940D2T85-TR from input voltage surges and transients, consider adding a transient voltage suppressor (TVS) diode or a voltage clamp circuit at the input, as well as using a suitable input capacitor with a high voltage rating and low ESR.