LTC3119MPFE#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The LTC3119 is a high-efficiency 5A buck-boost DC/DC converter operating from 2.5V to 18V input with adjustable output from 0.8V to 18V in a compact package. It uses current-mode PWM control for stable regulation across step-down and step-up conditions, ideal for multi-chemistry battery and automotive power systems. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- LTC3119MPFE#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $26.9400(MOQ 1)
- Temp Range
- -55.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 5A continuous output current with 2.5V to 18V input range
- Adjustable output voltage from 0.8V to 18V covering both step-up and step-down
- Current-mode PWM control for fast transient response and inherent current limiting
- Seamless buck-boost transition for battery-powered systems with wide input variation
- Supports automotive 12V bus and multi-chemistry battery pack applications
Applications
The LTC3119 is designed for portable and automotive power conversion systems where the input voltage can be above or below the desired output, such as Li-ion battery packs ranging from 2.5V to 18V powering a fixed 5V or 12V rail. Its 5A output and seamless buck-boost operation make it a strong choice for industrial handheld devices, medical equipment, and automotive 12V accessory regulators requiring continuous power through wide input transients.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1663 (EA) |
| YTEOL | 10 |
| Additional Feature | ADJUSTABLE OUPUT MODE FROM 0.8 TO 18 V |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 18V |
| Input Voltage-Min | 2.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G28 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 5A |
| Output Voltage-Max | 18V |
| Output Voltage-Min | 0.8V |
| Output Voltage-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 2000kHz |
| Technology | CMOS |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does LTC3119's buck-boost architecture handle the transition when input voltage equals output voltage?
The LTC3119 uses a 4-switch buck-boost topology with current-mode PWM control that transitions seamlessly between buck, boost, and buck-boost modes as the 2.5V to 18V input crosses the programmed output voltage. Unlike some converters that exhibit output glitches or discontinuities at the crossover point, the LTC3119 maintains stable regulation through the transition, which is critical for battery-powered systems where the cell voltage sweeps through the output set-point during discharge.
What is the maximum output current the LTC3119MPFE#PBF can deliver, and what thermal considerations apply?
The LTC3119 delivers up to 5A of continuous output current. At 5A output, thermal management depends on the input-to-output voltage conversion ratio and efficiency, typically requiring adequate copper area or an external heatsink pad on the PCB. At 12V input to 5V output, efficiency can exceed 90%, significantly reducing heat dissipation compared to a linear regulator delivering the same 5A load.
For a 12V automotive accessory rail design, why choose LTC3119 over a fixed-output buck converter?
The LTC3119's adjustable output from 0.8V to 18V allows a single design to power multiple output voltages by changing just the feedback resistor values, reducing the number of distinct converter ICs in the BOM. In automotive applications where the 12V bus can range from 8V during cold-crank to over 16V during load dump, the LTC3119's 2.5V to 18V input range ensures continuous regulation through these transients without needing additional protection circuitry.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $41.6600 | $41.66 |
| 10+ | $31.0390 | $310.39 |
| 1000+ | $26.9400 | $26940.00 |
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