LT8643SIV-2#PBF Analog Devices Integrated Circuit (Other) In Stock
Analog Devices LT8643SIV-2#PBF is a high-efficiency synchronous step-down DC-DC converter with 42 V input and 7 A output capability using current-mode PWM control. Features external voltage compensation for flexible loop tuning across 3.4 V to 42 V input range. Available from stock worldwide with fast shipping.
- Manufacturer
- Analog Devices
- Package
- Other
- Pin Count
- 24
- Lifecycle
- ACTIVE
- Datasheet
- LT8643SIV-2#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $7.5250(MOQ 4)
- 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 LT8643SIV-2#PBF?
- 42 V input rated synchronous buck regulator delivering up to 7 A continuous output current
- Current-mode PWM control with external VC pin for precise loop compensation customization
- Wide 3.4 V to 42 V input range covering automotive 12 V/24 V and industrial 36 V bus voltages
- High switching frequency reduces external component size enabling compact PCB footprint
What is LT8643SIV-2#PBF used for?
The LT8643SIV-2#PBF is used in industrial automation, automotive electronics, and telecom power supplies requiring a robust 42 V-tolerant synchronous buck converter capable of 7 A load current. Its external voltage compensation input allows engineers to optimize transient response for distributed power architectures and point-of-load applications. Power systems in factory controllers, ADAS modules, and 48 V bus converters benefit from its wide input range and high current capability.
What are the specifications of LT8643SIV-2#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1511 |
| Date Of Intro | 2018-09-28 |
| YTEOL | 10 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 42V |
| Input Voltage-Min | 3.4V |
| Input Voltage-Nom | 6V |
| JESD-30 Code | S-XQCC-N24 |
| Number of Functions | 1 |
| Output Current-Max | 12.5A |
| Output Voltage-Max | 25V |
| Output Voltage-Min | 3.3V |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC24,.16SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 3000kHz |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LT8643SIV-2#PBF datasheet?
LT8643SIV-2#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT8643SIV-2#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range and maximum output current does the LT8643SIV-2 support for automotive power designs?
The LT8643SIV-2 accepts input voltages from 3.4 V to 42 V and delivers up to 7 A continuous output current, making it compatible with 12 V, 24 V, and 36 V automotive and industrial bus voltages. This range allows a single design to cover both standard 12 V vehicle power rails and 48 V mild-hybrid bus voltages after adding appropriate input filtering.
How does the external VC compensation pin differentiate the LT8643SIV-2 from fixed-compensation synchronous buck converters?
The external VC pin on the LT8643SIV-2 allows designers to place a custom RC compensation network on the voltage control loop, independently tuning phase margin and crossover frequency for different output capacitor technologies and load transient requirements. Fixed-compensation regulators constrain loop bandwidth to a single optimized operating point, whereas this 7 A device supports capacitance values ranging from 10 µF ceramic to 100 µF electrolytic without sacrificing stability.
For a 24 V industrial rail requiring 5 V at 6 A, what efficiency advantage does the LT8643SIV-2 offer over a linear regulator?
A linear regulator dissipating (24 V - 5 V) × 6 A = 114 W as heat would require large heatsinking, whereas the LT8643SIV-2 synchronous buck topology achieves typical efficiencies above 90%, dissipating under 12 W at the same 24 V to 5 V conversion at 6 A. This 10x reduction in thermal dissipation eliminates heatsinks and enables higher power density in space-constrained 24 V industrial 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 |
|---|---|---|
| 4+ | $51.4926 | $205.97 |
| 6+ | $49.7762 | $298.66 |
| 7+ | $44.6269 | $312.39 |
| 19+ | $9.1700 | $174.23 |
| 100+ | $7.6334 | $763.34 |
| 250+ | $7.5250 | $1881.25 |
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