Overview
The LT8640IUDC#PBF is a high-performance step-down DC-DC converter produced by Analog Devices Inc. This device is designed for high-efficiency conversion from high input voltages to low output voltages, operating at high frequencies. It features a fast minimum top switch on-time of 30ns, making it suitable for a wide range of applications, including automotive and industrial supplies.
The LT8640IUDC#PBF is available in an 18-lead 3mm × 4mm QFN package and is AEC-Q100 qualified, ensuring reliability and quality for automotive applications. It also supports various operating modes, including Burst Mode, pulse-skipping mode, spread spectrum mode, and synchronization mode, which can be selected using the SYNC/MODE pin.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 5.5 | 42 | V | |
| Output Voltage Range | 0.97 | VIN - 0.5 | V | |
| Switching Frequency Range | 200 kHz | 3 MHz | ||
| Minimum Top Switch On-Time | 30 | ns | ||
| Output Current | 5 | A | ||
| Operating Temperature Range | -40 | 125 | °C | |
| Package Type | 18-Lead 3mm × 4mm QFN |
Key Features
- High-efficiency step-down conversion with fast minimum top switch on-time of 30ns.
- Adjustable and synchronizable switching frequency from 200 kHz to 3 MHz.
- Peak current mode operation with output soft-start and tracking capabilities.
- Safely tolerates inductor saturation in overload conditions.
- Multiple operating modes: Burst Mode, pulse-skipping mode, spread spectrum mode, and synchronization mode.
- AEC-Q100 qualified for automotive applications.
- Small 18-lead 3mm × 4mm QFN package with exposed pad for thermal management.
Applications
- Automotive supplies: The LT8640IUDC#PBF is AEC-Q100 qualified, making it suitable for automotive applications.
- Industrial supplies: High reliability and efficiency make it ideal for industrial power supplies.
- General-purpose step-down conversion: Suitable for various applications requiring high-efficiency DC-DC conversion.
- GSM power supplies: Efficient and reliable power supply for GSM systems.
Q & A
- What is the input voltage range of the LT8640IUDC#PBF?
The input voltage range is from 5.5V to 42V.
- What are the different operating modes available for the LT8640IUDC#PBF?
The device supports Burst Mode, pulse-skipping mode, spread spectrum mode, and synchronization mode.
- What is the typical switching frequency range of the LT8640IUDC#PBF?
The switching frequency range is adjustable from 200 kHz to 3 MHz.
- Is the LT8640IUDC#PBF suitable for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications.
- What is the package type of the LT8640IUDC#PBF?
The device is available in an 18-lead 3mm × 4mm QFN package.
- What is the minimum top switch on-time of the LT8640IUDC#PBF?
The minimum top switch on-time is 30ns.
- Does the LT8640IUDC#PBF support output soft-start and tracking?
Yes, it supports output soft-start and tracking.
- How does the LT8640IUDC#PBF handle inductor saturation in overload conditions?
The device safely tolerates inductor saturation in overload conditions.
- What is the operating temperature range of the LT8640IUDC#PBF?
The operating temperature range is from -40°C to 125°C.
- Can the LT8640IUDC#PBF be synchronized to an external frequency?
Yes, it can be synchronized to an external frequency using the SYNC/MODE pin.
