Part Details for LT1521IST-3#PBF by Linear Technology
Results Overview of LT1521IST-3#PBF by Linear Technology
- Distributor Offerings: (0 listings)
- Number of FFF Equivalents: (1 replacement)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (10 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
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Applications
Energy and Power Systems
Transportation and Logistics
Renewable Energy
Automotive
LT1521IST-3#PBF Information
LT1521IST-3#PBF by Linear Technology 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 LT1521IST-3#PBF
LT1521IST-3#PBF CAD Models
LT1521IST-3#PBF Part Data Attributes
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LT1521IST-3#PBF
Linear Technology
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Datasheet
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LT1521IST-3#PBF
Linear Technology
LT1521 - 300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: SOT; Pins: 3; Temperature Range: -40°C to 85°C
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| Rohs Code | Yes | |
| Part Life Cycle Code | Transferred | |
| Ihs Manufacturer | LINEAR TECHNOLOGY CORP | |
| Part Package Code | SOT | |
| Package Description | PLASTIC, SOT-223, 4 PIN | |
| Pin Count | 3 | |
| Manufacturer Package Code | ST | |
| Reach Compliance Code | not_compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Adjustability | FIXED | |
| Dropout Voltage1-Max | 0.75 V | |
| Dropout Voltage1-Nom | 0.5 V | |
| Input Voltage Absolute-Max | 20 V | |
| Input Voltage-Max | 20 V | |
| Input Voltage-Min | 4 V | |
| JESD-30 Code | R-PDSO-G4 | |
| JESD-609 Code | e3 | |
| Length | 6.505 mm | |
| Line Regulation-Max | 0.02% | |
| Load Regulation-Max | 0.055% | |
| Moisture Sensitivity Level | 1 | |
| Number of Functions | 1 | |
| Number of Outputs | 1 | |
| Number of Terminals | 4 | |
| Operating Temperature TJ-Max | 125 °C | |
| Operating Temperature TJ-Min | -40 °C | |
| Output Current1-Max | 0.3 A | |
| Output Voltage1-Max | 3.1 V | |
| Output Voltage1-Min | 2.9 V | |
| Output Voltage1-Nom | 3 V | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Code | SOP | |
| Package Equivalence Code | SOT-223 | |
| Package Shape | RECTANGULAR | |
| Package Style | SMALL OUTLINE | |
| Peak Reflow Temperature (Cel) | 260 | |
| Qualification Status | Not Qualified | |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | |
| Seated Height-Max | 1.8 mm | |
| Surface Mount | YES | |
| Technology | BIPOLAR | |
| Terminal Finish | Matte Tin (Sn) | |
| Terminal Form | GULL WING | |
| Terminal Pitch | 2.3 mm | |
| Terminal Position | DUAL | |
| Time@Peak Reflow Temperature-Max (s) | 30 | |
| Voltage Tolerance-Max | 3.3% | |
| Width | 3.505 mm |
Alternate Parts for LT1521IST-3#PBF
This table gives cross-reference parts and alternative options found for LT1521IST-3#PBF. 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 LT1521IST-3#PBF, 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 |
|---|---|---|---|---|
| LT1521IST-3 | Analog Devices Inc | Check for Price | Fixed Positive LDO Regulator, 3V, 0.75V Dropout, PDSO4 | LT1521IST-3#PBF vs LT1521IST-3 |
LT1521IST-3#PBF Frequently Asked Questions (FAQ)
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The LT1521 can handle input voltages up to 36V, but it's recommended to keep the input voltage below 30V for optimal performance and reliability.
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To ensure stability, make sure to follow the recommended layout and component placement guidelines, use a sufficient output capacitor, and add a small capacitor (e.g., 10nF) between the Vout pin and GND to filter out high-frequency noise.
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The minimum ESR required for the output capacitor is 0.05Ω. Using a capacitor with a lower ESR may cause instability or oscillation.
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The LT1521 is rated for operation up to 125°C, but its performance and reliability may degrade at high temperatures. It's recommended to derate the output current and voltage according to the temperature derating curve in the datasheet.
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The output voltage ripple can be calculated using the formula: ΔVout = (Iout * ESR) / (fsw * Cout), where Iout is the output current, ESR is the output capacitor's equivalent series resistance, fsw is the switching frequency, and Cout is the output capacitance.