Overview
The LT8641IUDC#PBF is a high-performance step-down DC/DC converter from Analog Devices Inc., featuring the Silent Switcher architecture. This architecture is designed to minimize EMI/EMC emissions while delivering high efficiency across a wide range of frequencies. The LT8641 is a monolithic, constant frequency, current mode converter that is suitable for various applications requiring high efficiency and low noise.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Minimum Input Voltage | 2.6 | 3.0 | V | |
| Output Voltage Range | 0.783 | 24 | V | |
| Output Current | 5 | A | ||
| Switching Frequency | 200 | 1000 | 3000 | kHz |
| Operating Temperature Range | -40 | 125 | °C | |
| Quiescent Current (VEN/UV = 0V) | 0.75 | 0.75 | 3 | µA |
| Package Type | 18-Lead (3mm × 4mm) Plastic QFN |
Key Features
- Silent Switcher Architecture: Minimizes EMI/EMC emissions, ensuring high efficiency and low noise operation.
- High Efficiency: Achieves high efficiency across a wide range of frequencies and load conditions.
- Constant Frequency Operation: Operates at a constant frequency set by an external resistor on the RT pin.
- Multiple Operating Modes: Supports Burst Mode, pulse-skipping mode, and full frequency continuous operation, configurable via the SYNC/MODE pin.
- Tracking Function: Allows the output voltage to track an external voltage source via the TR/SS pin.
- Low Quiescent Current: Ultralow quiescent current in Burst Mode, making it suitable for low power applications.
- Automotive Grade: Versions available with controlled manufacturing to support automotive applications, designated with a #W suffix.
Applications
- Automotive Systems: Suitable for automotive applications due to its high reliability and wide operating temperature range.
- Industrial Power Supplies: Ideal for industrial power supplies requiring high efficiency and low EMI.
- Telecommunications: Used in telecommunications equipment where low noise and high efficiency are critical.
- Medical Devices: Applicable in medical devices that require reliable and efficient power conversion.
- Consumer Electronics: Suitable for various consumer electronics requiring compact, high-efficiency power solutions.
Q & A
- What is the minimum input voltage for the LT8641IUDC#PBF?
The minimum input voltage is 2.6V.
- What is the maximum output current of the LT8641IUDC#PBF?
The maximum output current is 5A.
- What are the different operating modes supported by the LT8641IUDC#PBF?
The device supports Burst Mode, pulse-skipping mode, and full frequency continuous operation.
- How is the switching frequency set in the LT8641IUDC#PBF?
The switching frequency is set using an external resistor on the RT pin.
- What is the purpose of the TR/SS pin in the LT8641IUDC#PBF?
The TR/SS pin allows the output voltage to track an external voltage source.
- Is the LT8641IUDC#PBF suitable for automotive applications?
Yes, versions designated with a #W suffix are available for automotive applications.
- What is the operating temperature range of the LT8641IUDC#PBF?
The operating temperature range is -40°C to 125°C.
- What package type is the LT8641IUDC#PBF available in?
The device is available in an 18-Lead (3mm × 4mm) Plastic QFN package.
- How does the Silent Switcher architecture benefit the LT8641IUDC#PBF?
The Silent Switcher architecture minimizes EMI/EMC emissions, ensuring high efficiency and low noise operation.
- What is the quiescent current of the LT8641IUDC#PBF when VEN/UV = 0V?
The quiescent current is 0.75µA when VEN/UV = 0V.
