LT8391AEUFD#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
LT8391AEUFD#PBF is an Analog Devices automotive-grade synchronous 4-switch buck-boost LED driver controller with 2800 µA supply current in a 28-pin QFN EP package. Designed for wide input-to-output voltage LED string driving in automotive lighting and industrial illumination systems.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- LT8391AEUFD#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $4.3700(MOQ 1)
- 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 LT8391AEUFD#PBF?
- Automotive-grade LED driver rated for harsh -40°C to +125°C environments
- 4-switch synchronous buck-boost topology enabling wide Vin-to-Vout range operation
- 2800 µA quiescent supply current for efficient low-power standby operation
- Dual-segment LED string control with open-drain output stage
- 28-pin QFN EP package with exposed pad for enhanced thermal dissipation
What is LT8391AEUFD#PBF used for?
The LT8391AEUFD#PBF is designed for automotive LED headlight, daytime running light, and tail light driver circuits where the supply voltage may be above or below the LED string voltage across the full 9V to 60V automotive battery range. Its 4-switch buck-boost architecture allows continuous, flicker-free LED current regulation through load dump and cold-crank transients. Industrial lighting designers also use this device in high-power LED panel drivers and architectural illumination systems requiring precise constant-current control.
What are the specifications of LT8391AEUFD#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1712 |
| YTEOL | 10 |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | R-PQCC-N28 |
| JESD-609 Code | e3 |
| Multiplexed Display Capability | NO |
| Number of Functions | 1 |
| Number of Segments | 2 |
| Output Characteristics | OPEN-DRAIN |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC28,.16X.2,20 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Supply Voltage-Max | 60V |
| Supply Voltage-Min | 4V |
| Supply Voltage-Nom | 12V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
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 | Malaysia |
Where can I find the LT8391AEUFD#PBF datasheet?
LT8391AEUFD#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT8391AEUFD#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What switching topology does the LT8391AEUFD#PBF use and why is it advantageous for automotive LED lighting?
The LT8391AEUFD#PBF implements a 4-switch synchronous buck-boost topology, which allows the LED string voltage to be above or below the input supply voltage. In automotive applications with a 12V battery rail that can drop to 6V during cold cranking or spike to 45V during load dump, this topology maintains stable LED current without requiring separate boost or buck converter stages.
What is the quiescent supply current of the LT8391AEUFD#PBF and how does it affect system efficiency?
The LT8391AEUFD#PBF draws 2800 µA quiescent supply current during normal operation. In automotive daytime running light systems that remain powered whenever the vehicle is on, low quiescent current directly reduces idle power loss, which is important for fuel economy compliance and thermal management in compact LED driver modules.
For which automotive lighting subsystems is the LT8391AEUFD#PBF particularly well-suited?
The LT8391AEUFD#PBF is well-suited for automotive LED headlights, rear combination lamps, and daytime running light modules operating from a 12V or 24V vehicle bus. Its AEC-Q100-aligned automotive-grade rating supports operation from -40°C to +125°C, meeting the thermal and reliability demands of under-hood and exterior lighting assemblies.
How does the 28-pin QFN EP package of the LT8391AEUFD#PBF support thermal management in LED driver designs?
The 28-pin QFN EP package includes an exposed thermal pad on its underside that can be soldered directly to the PCB ground plane, providing a low thermal resistance path of typically 30°C/W junction-to-board. This is critical for high-current LED driver designs where the controller dissipates several hundred milliwatts during full-brightness operation in confined automotive enclosures.
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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+ | $10.2700 | $10.27 |
| 10+ | $6.9870 | $69.87 |
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