L4945Alternatives & Equivalent Parts
About L4945
L4945 is a Integrated Circuit component manufactured by STMicroelectronics. It comes in a Transistor Outline, Vertical package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
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Specification Comparison
| Parameter | L4945Source | L4940V5 | L4978 | L4962/A | L4995JTR |
|---|---|---|---|---|---|
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package Type | Transistor Outline, Vertical | Transistor Outline, Vertical | Dual-In-Line Packages | Dual-In-Line Packages | Small Outline Packages |
| Pin Count | 3 | 3 | 8 | 16 | 12 |
| Temperature Range | — | — | -40.0°C ~ 150.0°C | -40.0°C ~ 150.0°C | — |
| Price | $3.6072 | $0.5720 | $1.8082 | $3.0200 | $0.6793 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | OBSOLETE | ACTIVE | ACTIVE | OBSOLETE | ACTIVE |
| Electrical Parameters | |||||
| YTEOL | 0 | 5.9 | 6 | 0 | 6.8 |
| Adjustability | FIXED | FIXED | — | — | FIXED |
| Dropout Voltage1-Max | 0.75 V | 0.9 V | — | — | 0.5 V |
| Dropout Voltage1-Nom | 0.75 V | 0.5 V | — | — | 0.5 V |
| Input Voltage Absolute-Max | 35 V | 30 V | — | — | 40 V |
| Input Voltage-Max | 26 V | 17 V | 55 V | 46 V | 31 V |
| Input Voltage-Min | 6 V | 6 V | 8 V | 9 V | 5.6 V |
| JESD-30 Code | R-PSFM-T3 | R-PSFM-T3 | R-PDIP-T8 | R-PDIP-T16 | R-PDSO-G12 |
| JESD-609 Code | e0 | e3 | e3 | e3 | e3 |
| Line Regulation-Max | 0.01% | 0.01% | — | — | 0.025% |
| Load Regulation-Max | 0.06% | 0.025% | — | — | 0.025% |
| Number of Functions | 1 | 1 | 1 | 1 | 1 |
| Number of Outputs | 1 | 1 | — | — | 1 |
| Operating Temperature TJ-Max | 125 °C | 150 °C | — | — | 150 °C |
| Operating Temperature TJ-Min | -40 °C | -40 °C | — | — | -40 °C |
| Output Current1-Max | 0.5 A | 1.5 A | — | — | 0.5 A |
| Output Voltage1-Max | 5.2 V | 5.2 V | — | — | 5.1 V |
| Output Voltage1-Min | 4.8 V | 4.8 V | — | — | 4.9 V |
| Output Voltage1-Nom | 5 V | 5 V | — | — | 5 V |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Equivalence Code | SIP3,.1TB | SIP3,.1TB | DIP8,.3 | DIP16,.3 | SOP24,.4,32 |
| Package Shape | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR |
| Package Style | FLANGE MOUNT | FLANGE MOUNT | IN-LINE | IN-LINE | SMALL OUTLINE, HEAT SINK/SLUG, LOW PROFILE, SHRINK PITCH |
| Qualification Status | 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 |
| Surface Mount | NO | NO | NO | NO | YES |
| Technology | BIPOLAR | BIPOLAR | BCDMOS | BIPOLAR | BICMOS |
| Terminal Finish | TIN LEAD | Matte Tin (Sn) - annealed | Matte Tin (Sn) - annealed | MATTE TIN | Matte Tin (Sn) - annealed |
| Terminal Form | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | GULL WING |
| Terminal Pitch | 2.54 mm | 2.54 mm | 2.54 mm | 2.54 mm | 0.8 mm |
| Terminal Position | SINGLE | SINGLE | DUAL | DUAL | DUAL |
| Voltage Tolerance-Max | 4% | 4% | — | — | 2% |
| Factory Lead Time | — | 8 Weeks | 16 Weeks | — | 23 Weeks |
| Packing Method | — | TUBE | — | — | TR |
| Peak Reflow Temperature (Cel) | — | NOT SPECIFIED | — | — | 260 |
| Time@Peak Reflow Temperature-Max (s) | — | NOT SPECIFIED | — | — | — |
| Analog IC - Other Type | — | — | SWITCHING REGULATOR | SWITCHING REGULATOR | — |
| Control Mode | — | — | VOLTAGE-MODE | VOLTAGE-MODE | — |
| Control Technique | — | — | PULSE WIDTH MODULATION | PULSE WIDTH MODULATION | — |
| Input Voltage-Nom | — | — | 24 V | 35 V | — |
| Output Current-Max | — | — | 3.5 A | 3.3 A | — |
| Output Voltage-Max | — | — | 50 V | 40 V | — |
| Output Voltage-Min | — | — | 3.3 V | 5.1 V | — |
| Output Voltage-Nom | — | — | 3.36 V | 5.1 V | — |
| Supply Current-Max (Isup) | — | — | 6 mA | 40 mA | — |
| Switcher Configuration | — | — | BUCK | BUCK | — |
| Switching Frequency-Max | — | — | 300 kHz | 150 kHz | — |
| Temperature Grade | — | — | — | AUTOMOTIVE | — |
| Screening Level | — | — | — | — | AEC-Q100 |
| ## L4995JTR Alternates Showing results | — | — | — | — | Image |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Need pricing on these alternatives?
Get one quote covering all 4 alternatives for L4945 — response within 24 hours.
Quick Links
Why Look for Alternatives?
Finding alternatives for L4945 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 L4945 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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FAQ
What is equivalent to L4945?
Known equivalents for L4945 include L4940V5, L4978, L4962/A. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of L4945?
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 L4945 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.