Part Details for LT1959IR by Linear Technology
Results Overview of LT1959IR by Linear Technology
- Distributor Offerings: (1 listing)
- 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
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LT1959IR Information
LT1959IR by Linear Technology is a Switching Regulator or Controller.
Switching Regulator or Controllers 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.
Price & Stock for LT1959IR
| Part # | Distributor | Description | Stock | Price | Buy | |
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Rochester Electronics | Step-Down Switching Regulator RoHS: Not Compliant Status: Obsolete Min Qty: 1 | 50 |
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$15.3400 / $19.1800 | Buy Now |
Part Details for LT1959IR
LT1959IR CAD Models
LT1959IR Part Data Attributes
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LT1959IR
Linear Technology
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Datasheet
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LT1959IR
Linear Technology
LT1959 - 4.5A, 500kHz Step-Down Switching Regulator; Package: DD PAK; Pins: 7; Temperature Range: -40°C to 85°C
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| Rohs Code | No | |
| Part Life Cycle Code | Transferred | |
| Ihs Manufacturer | LINEAR TECHNOLOGY CORP | |
| Part Package Code | D2PAK | |
| Package Description | PLASTIC, D2PAK-7 | |
| Pin Count | 7 | |
| Manufacturer Package Code | R | |
| Reach Compliance Code | not_compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Analog IC - Other Type | SWITCHING REGULATOR | |
| Control Mode | CURRENT-MODE | |
| Input Voltage-Max | 15 V | |
| Input Voltage-Min | 4.3 V | |
| Input Voltage-Nom | 5 V | |
| JESD-30 Code | R-PSSO-G7 | |
| JESD-609 Code | e0 | |
| Length | 10.2235 mm | |
| Moisture Sensitivity Level | 1 | |
| Number of Functions | 1 | |
| Number of Terminals | 7 | |
| Output Current-Max | 8.5 A | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Code | TO-263 | |
| Package Equivalence Code | SMSIP7H,.55,50TB | |
| Package Shape | RECTANGULAR | |
| Package Style | SMALL OUTLINE | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 4.572 mm | |
| Surface Mount | YES | |
| Switcher Configuration | BUCK | |
| Switching Frequency-Max | 560 kHz | |
| Technology | BIPOLAR | |
| Terminal Finish | TIN LEAD OVER NICKEL | |
| Terminal Form | GULL WING | |
| Terminal Pitch | 1.27 mm | |
| Terminal Position | SINGLE | |
| Width | 8.89 mm |
Alternate Parts for LT1959IR
This table gives cross-reference parts and alternative options found for LT1959IR. 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 LT1959IR, 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 |
|---|---|---|---|---|
| LT1959IR#PBF | Linear Technology | Check for Price | LT1959 - 4.5A, 500kHz Step-Down Switching Regulator; Package: DD PAK; Pins: 7; Temperature Range: -40°C to 85°C | LT1959IR vs LT1959IR#PBF |
LT1959IR Frequently Asked Questions (FAQ)
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The maximum input voltage that can be applied to the LT1959IR is 36V, but it's recommended to keep it below 30V for reliable operation.
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To ensure stability, make sure to follow the recommended layout and component selection guidelines, including the use of a 10uF ceramic capacitor at the output, and a 1uF ceramic capacitor at the input. Also, keep the input and output capacitors close to the IC.
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The minimum ESR required for the output capacitor is 0.05 ohms. Using a capacitor with a lower ESR can cause instability and oscillation.
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The LT1959IR is rated for operation up to 125°C, but it's recommended to derate the output current and voltage at higher temperatures to ensure reliable operation. Consult the datasheet for thermal derating curves.
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The output voltage ripple can be calculated using the formula: ΔVout = (Iout x ESR) / (f x Cout), where Iout is the output current, ESR is the equivalent series resistance of the output capacitor, f is the switching frequency, and Cout is the output capacitance.