Overview
The LT8638SJV#PBF is a high-performance, synchronous step-down regulator from Analog Devices Inc., designed with the second-generation Silent Switcher architecture. This regulator is optimized to minimize EMI emissions while delivering high efficiency and reliability. It is available in a 28-pin QFN package and is suitable for a wide range of applications, including automotive and industrial systems.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Units |
|---|---|---|---|---|
| Input Voltage (VIN) | 2.6 | 2.8 | 42 | V |
| Output Current | - | - | 10A (Continuous), 12A (Peak) | A |
| Switching Frequency | - | 400kHz, 1MHz, 2MHz | - | kHz, MHz |
| Operating Junction Temperature Range | -40°C | - | 125°C (LT8638SE), 150°C (LT8638SJ) | °C |
| Quiescent Current in Shutdown | - | 6 | 9 | µA |
| Feedback Voltage (FB) | - | 0.6 | - | V |
| Package Type | - | - | 28-pin QFN | - |
Key Features
- Silent Switcher Architecture: Minimizes EMI emissions, making it suitable for noise-sensitive applications.
- High Efficiency: Achieves high efficiency across a wide range of load currents.
- Adjustable Output Voltage: Allows for flexible output voltage settings.
- Soft-Start and Tracking: The SS pin enables user control of the output voltage ramp rate during start-up and supports output voltage tracking.
- Overtemperature Protection: Protects the device during overload conditions by limiting the junction temperature.
- Automotive Grade: Versions with the #W suffix are available for automotive applications, ensuring compliance with automotive reliability standards.
Applications
- Automotive Systems: Suitable for various automotive applications due to its high reliability and compliance with automotive standards.
- Industrial Systems: Used in industrial power supplies, motor control systems, and other high-reliability industrial applications.
- Communication Equipment: Ideal for communication devices that require low EMI and high efficiency.
- Medical Devices: Can be used in medical equipment where high reliability and low noise are critical.
Q & A
- What is the input voltage range of the LT8638SJV#PBF? The input voltage range is from 2.6V to 42V.
- What is the maximum output current of the LT8638SJV#PBF? The maximum continuous output current is 10A, with a peak current of 12A.
- What are the available switching frequencies for the LT8638SJV#PBF? The available switching frequencies are 400kHz, 1MHz, and 2MHz.
- What is the operating junction temperature range for the LT8638SJV#PBF? The operating junction temperature range is from -40°C to 125°C for the LT8638SE and up to 150°C for the LT8638SJ.
- Does the LT8638SJV#PBF have overtemperature protection? Yes, it includes overtemperature protection to safeguard the device during overload conditions.
- How does the soft-start feature work on the LT8638SJV#PBF? The SS pin allows user control of the output voltage ramp rate during start-up, and it can be programmed using a capacitor to set the desired slew rate.
- Is the LT8638SJV#PBF suitable for automotive applications? Yes, versions with the #W suffix are designed to meet automotive reliability standards.
- What package type is the LT8638SJV#PBF available in? It is available in a 28-pin QFN package.
- What is the feedback voltage (FB) of the LT8638SJV#PBF? The feedback voltage (FB) is regulated to 0.6V.
- How can I improve the thermal performance of the LT8638SJV#PBF? Refer to the Applications Information section of the datasheet for guidelines on improving thermal resistance and actual temperature measurements of a demo board in typical operating conditions.
