LTC3859ALIFE#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The LTC3859ALIFE#PBF is a triple-output synchronous switching controller supporting two buck and one boost converter from a 4.5V to 38V input, with outputs adjustable from 0.8V to 24V. It features 28µA Burst Mode quiescent current and current-mode PWM control in a 38-pin TSSOP package. Available in stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 38
- Lifecycle
- ACTIVE
- Datasheet
- LTC3859ALIFE#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $6.9200(MOQ 19)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC3859ALIFE#PBF?
- Triple-output Buck/Buck/Boost topology supports diverse power rails from a single 4.5V to 38V input
- Ultra-low 28µA Burst Mode IQ minimizes standby power loss in always-on and battery-backed systems
- Output voltage range from 0.8V to 24V with current-mode PWM control for fast transient response and loop stability
- Industrial-grade temperature rating suitable for -40°C to 125°C harsh environment deployments
What is LTC3859ALIFE#PBF used for?
The LTC3859ALIFE#PBF is designed for multi-rail power systems in telecommunications equipment, industrial servers, and embedded computing platforms requiring simultaneous 3.3V, 1.8V, and 5V or higher output rails. Its buck-buck-boost architecture is ideal for systems where one output must step up above the input voltage, such as generating a 12V rail from an automotive or industrial 4.5V to 38V bus. The 28µA Burst Mode quiescent current extends battery life in always-on monitoring and telecom line-card applications.
What are the specifications of LTC3859ALIFE#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1772 |
| YTEOL | 10 |
| Additional Feature | OUTPUT VOLTAGE RANGE FROM 0.8 VOLT TO 24 VOLT |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 38V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G38 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 24V |
| Output Voltage-Min | 0.8V |
| 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 | 900kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| 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 |
Where can I find the LTC3859ALIFE#PBF datasheet?
LTC3859ALIFE#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC3859ALIFE#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input voltage range of the LTC3859ALIFE#PBF and which power bus voltages does it support?
The LTC3859ALIFE#PBF accepts input voltages from 4.5V to 38V, making it compatible with 5V, 12V, 24V, and automotive 12V to 28V power buses. This wide input range covers industrial 24V systems, telecom 48V-derived rails, and standard ATX desktop supplies in a single controller design.
How does the LTC3859ALIFE#PBF achieve low quiescent current in standby, and when is this critical?
The LTC3859ALIFE#PBF enters Burst Mode operation at light loads, reducing quiescent current to 28µA across all 3 channels. This is critical in telecom line cards, industrial IoT gateways, and always-on embedded systems where the power supply must remain active overnight or for weeks between active duty cycles.
What output voltage range can the LTC3859ALIFE#PBF regulate, and how does the boost output differ from the two bucks?
All three channels can regulate outputs from 0.8V to 24V. The boost channel can step up the input voltage to produce outputs above the rail—for example, generating 12V from a 5V input—while the two buck channels step down from the 4.5V to 38V input to lower regulated voltages such as 1.8V or 3.3V.
For which multi-rail embedded platform designs is the LTC3859ALIFE#PBF a strong alternative to using three separate switching regulators?
When a design needs 3 rails simultaneously—such as 1.8V for DDR memory, 3.3V for I/O logic, and a boosted 12V for an analog front-end—the LTC3859ALIFE#PBF replaces 3 discrete controllers with 1 device, reducing quiescent current by up to 60%, shrinking the solution footprint, and simplifying sequencing with built-in run pin and soft-start controls.
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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 |
|---|---|---|
| 19+ | $9.1700 | $174.23 |
| 100+ | $7.6334 | $763.34 |
| 250+ | $7.5250 | $1881.25 |
| 1000+ | $6.9200 | $6920.00 |
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