Overview
The LT8640IUDC-1#TRPBF is a high-efficiency, step-down DC-DC converter from Analog Devices Inc., designed with the Silent Switcher architecture to minimize EMI emissions. This regulator is suitable for a wide range of applications, including automotive and industrial supplies, due to its robust performance and reliability features.
It offers adjustable and synchronizable switching frequencies from 200kHz to 3MHz, making it versatile for various system requirements. The device is available in a compact 18-lead 3mm × 4mm QFN package, which includes an exposed pad for improved thermal performance.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 3.4 | - | 42 | V |
| Output Voltage Range | 0.97 | - | 41.9 | V |
| Maximum Output Current | - | - | 5 | A |
| Switching Frequency Range | 200kHz | - | 3MHz | - |
| Efficiency at 1MHz, 12VIN to 5VOUT | - | - | Up to 96% | - |
| Efficiency at 2MHz, 12VIN to 5VOUT | - | - | Up to 95% | - |
| Package Type | - | - | 18-Lead 3mm × 4mm QFN | - |
| Operating Temperature Range | -40 | - | 125 | °C |
Key Features
- Silent Switcher Architecture: Designed to minimize EMI emissions while delivering high efficiency.
- Adjustable and Synchronizable Frequency: From 200kHz to 3MHz, allowing for flexibility in system design.
- Peak Current Mode Operation: Ensures accurate current limiting and fast transient response.
- Output Soft-Start and Tracking: Helps in reducing inrush current and ensuring smooth startup.
- Forced Continuous Mode (LT8640-1 Only): Offers fast transient response and full frequency operation over a wide load range.
- Spread Spectrum Mode: Reduces EMI by modulating the switching frequency.
- Synchronization Mode: Allows synchronization with an external clock source.
- Overtemperature Protection: Protects the device during overload conditions.
- AEC-Q100 Qualified: Suitable for automotive applications with controlled manufacturing for quality and reliability.
Applications
- Automotive Supplies: Ideal for use in automotive systems due to its AEC-Q100 qualification and robust performance.
- Industrial Supplies: Suitable for industrial power supplies requiring high efficiency and low EMI.
- General Purpose Step-Down Conversion: Can be used in a variety of general-purpose step-down conversion applications.
- GSM Power Supplies: Applicable in GSM power supply systems where high efficiency and low noise are critical.
Q & A
- What is the input voltage range of the LT8640IUDC-1#TRPBF?
The input voltage range is from 3.4V to 42V.
- What is the maximum output current of the LT8640IUDC-1#TRPBF?
The maximum output current is 5A.
- What are the switching frequency options for the LT8640IUDC-1#TRPBF?
The switching frequency can be adjusted and synchronized from 200kHz to 3MHz.
- What is the efficiency of the LT8640IUDC-1#TRPBF at 1MHz and 2MHz switching frequencies?
The efficiency is up to 96% at 1MHz and up to 95% at 2MHz for a 12VIN to 5VOUT configuration.
- What package type is the LT8640IUDC-1#TRPBF available in?
The device is available in an 18-lead 3mm × 4mm QFN package.
- Is the LT8640IUDC-1#TRPBF suitable for automotive applications?
Yes, it is AEC-Q100 qualified and designed for automotive applications with controlled manufacturing for quality and reliability.
- What are the key features of the Silent Switcher architecture in the LT8640IUDC-1#TRPBF?
The Silent Switcher architecture minimizes EMI emissions while delivering high efficiency.
- Does the LT8640IUDC-1#TRPBF support forced continuous mode operation?
Yes, the LT8640-1 version supports forced continuous mode operation, which offers fast transient response and full frequency operation over a wide load range.
- How does the LT8640IUDC-1#TRPBF handle overtemperature conditions?
The device includes overtemperature protection to protect it during overload conditions.
- What is the operating temperature range of the LT8640IUDC-1#TRPBF?
The operating temperature range is from -40°C to 125°C.
