LT8640HUDC-1#PBF Analog Devices Integrated Circuit (Other) In Stock
Analog Devices LT8640HUDC-1#PBF is a 42V, 6A synchronous step-down Silent Switcher DC/DC converter with 2.5µA quiescent current, current-mode control, and ultra-low EMI in an 18-lead LQFN package.
- Manufacturer
- Analog Devices
- Package
- Other
- Pin Count
- 18
- Lifecycle
- ACTIVE
- Datasheet
- LT8640HUDC-1#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $6.9000(MOQ 1)
- Temp Range
- -40.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT8640HUDC-1#PBF?
- 42V input voltage range with 3.4V minimum, supporting wide supply rails
- 6A continuous output current with synchronous rectification for high efficiency
- Silent Switcher technology with 2.5µA quiescent current minimizing EMI and noise
- Current-mode control for fast transient response and accurate cycle-by-cycle current limiting
What is LT8640HUDC-1#PBF used for?
The LT8640HUDC-1#PBF is ideal for industrial power supplies, automotive electronics, and high-density computing systems requiring tight EMI compliance. Its 42V input range and 6A output make it suitable for 24V and 12V bus conversion in factory automation, robotics, and telecom infrastructure. The Silent Switcher architecture enables compliance with strict CISPR emissions standards without external shielding.
What are the specifications of LT8640HUDC-1#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1956 |
| YTEOL | 8.5 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | SILENT SWITCHER |
| Input Voltage-Max | 42V |
| Input Voltage-Min | 3.4V |
| Input Voltage-Nom | 6V |
| JESD-30 Code | R-PQCC-N18 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 5A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC18/20,.12X.16,20 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Current-Max (Isup) | 0.35mA |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 3000kHz |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
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 LT8640HUDC-1#PBF datasheet?
LT8640HUDC-1#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT8640HUDC-1#PBF?
Compatible alternatives and drop-in replacements for LT8640HUDC-1#PBF:
suggested
suggested
suggested
suggested
Frequently Asked Questions
What input voltage range does the LT8640HUDC-1#PBF support, and can it handle 24V industrial bus supplies?
The LT8640HUDC-1#PBF supports an input voltage range of 3.4V to 42V, making it fully compatible with 24V industrial bus supplies. This wide range accommodates load-dump transients in automotive and industrial environments without requiring additional protection circuitry.
How much output current can the LT8640HUDC-1#PBF deliver, and what efficiency can be expected at full load?
The LT8640HUDC-1#PBF delivers up to 6A continuous output current with synchronous rectification. At typical 12V-to-5V conversion, efficiency exceeds 90%, and the 2.5µA quiescent current keeps losses minimal at light loads, extending battery life in standby-heavy designs.
Which EMI-sensitive applications benefit most from the Silent Switcher topology in the LT8640HUDC-1#PBF?
Applications requiring CISPR 25 Class 5 or EN55032 compliance, such as automotive infotainment, medical instrumentation, and RF-adjacent communication boards, benefit most. The Silent Switcher layout with integrated bypass capacitors reduces radiated EMI by over 20 dB compared to conventional switchers operating at the same 2MHz switching frequency.
What package does the LT8640HUDC-1#PBF use and how does it affect PCB layout for thermal management?
The LT8640HUDC-1#PBF comes in an 18-lead LQFN (3mm x 4mm) package with an exposed pad. The exposed pad must be soldered to the PCB ground plane with multiple thermal vias to achieve the rated 6A output; without adequate copper pour, junction temperature at full load with a 42V input can exceed the 125°C operating limit.
When would a designer choose the LT8640HUDC-1#PBF over a standard non-silent-switcher buck converter at the same 6A rating?
A designer should choose the LT8640HUDC-1#PBF when conducted or radiated EMI margins are tight—for example, meeting CISPR 32 limits for multimedia equipment or automotive OEM EMI specs. The Silent Switcher architecture achieves these targets at 2MHz switching frequency without large ferrite beads or additional shielding that would otherwise add cost and board area to a conventional 6A buck design.
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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+ | $7.8807 | $7.88 |
| 1000+ | $6.9000 | $6900.00 |
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