LT8390AIUFD#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
Analog Devices LT8390AIUFD#PBF is an AEC-Q100 Grade 1 automotive current-mode PWM DC/DC controller supporting buck, boost, and buck-boost topologies with a 4 V to 60 V input range and up to 1430 kHz switching frequency in a compact 28-pin QFN-EP package. Available in stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- LT8390AIUFD#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $6.6700(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 LT8390AIUFD#PBF?
- Supports buck, boost, and 4-switch buck-boost topologies with a single IC, covering input voltages from 4 V to 60 V for flexible automotive power rail design
- Current-mode PWM control at up to 1430 kHz switching frequency enables small external inductors and capacitors, reducing total BOM size and PCB area
- AEC-Q100 Grade 1 automotive qualification ensures reliable operation across -40°C to +125°C junction temperature for under-hood and body-control applications
- 28-pin QFN-EP package with exposed thermal pad delivers excellent heat dissipation, keeping junction temperature low at high switching frequencies and duty cycles
What is LT8390AIUFD#PBF used for?
LT8390AIUFD#PBF is designed for automotive LED headlight drivers, ADAS sensor power rails, and electric vehicle DC-DC conversion stages that require a regulated output regardless of whether the input is above or below the output voltage. It is also used in industrial 24 V to 48 V bus converters and telecom board power supplies where the wide 4 V–60 V input range accommodates broad input voltage transients. Battery-powered portable instruments benefit from its buck-boost capability to maintain a stable 12 V or 24 V rail as the battery voltage varies through its full discharge range.
What are the specifications of LT8390AIUFD#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1712 |
| YTEOL | 10 |
| Additional Feature | SEATED HT-CALCULATED |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 60V |
| Input Voltage-Min | 4V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PQCC-N28 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 60V |
| 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 |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 2100kHz |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| 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 LT8390AIUFD#PBF datasheet?
LT8390AIUFD#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT8390AIUFD#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does LT8390AIUFD#PBF support, and which switching topologies can it implement?
LT8390AIUFD#PBF accepts input voltages from 4 V to 60 V and supports buck (step-down), boost (step-up), and 4-switch buck-boost topologies from a single IC. This makes it suitable for automotive battery rails that swing between 6 V cold-crank and 45 V load-dump transients while maintaining a regulated 12 V or 24 V output.
How does the 1430 kHz switching frequency of LT8390AIUFD#PBF benefit compact automotive PCB designs?
Operating at up to 1430 kHz allows designers to use inductors as small as 2.2 µH and output capacitors below 10 µF, significantly shrinking the power stage footprint on densely packed ADAS sensor boards or ECU modules where PCB area is constrained to under 50 cm². Higher frequency also pushes switching noise above the AM radio band, simplifying EMI filter design in infotainment systems.
Why is LT8390AIUFD#PBF preferred for automotive LED headlight driver designs over a standard boost controller?
Unlike a simple boost controller, LT8390AIUFD#PBF can regulate the LED string current whether the 12 V battery rail is above or below the LED forward voltage stack, which may range from 9 V to 45 V across temperature and dimming conditions. Its AEC-Q100 Grade 1 rating and -40°C to +125°C operating range also guarantee compliance with automotive thermal requirements that standard industrial controllers may not meet.
What thermal advantages does the 28-pin QFN-EP package of LT8390AIUFD#PBF offer in high-frequency operation?
The exposed thermal pad on the 28-pin QFN-EP package gives a junction-to-board thermal resistance below 15°C/W when soldered to a standard 2-layer PCB with a copper pour, allowing the IC to dissipate several hundred milliwatts of gate-drive and quiescent losses at 1430 kHz switching without exceeding the 125°C maximum junction temperature even in a 105°C ambient automotive environment.
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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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|---|---|---|
| 1+ | $14.1100 | $14.11 |
| 10+ | $9.7910 | $97.91 |
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