Overview
The LTC7801IUFD#PBF is a high-performance step-down switching regulator DC/DC controller produced by Analog Devices Inc. This device is designed to drive an all N-channel synchronous power MOSFET stage, enabling efficient and reliable power conversion. The LTC7801 is part of the LTC7801 series, which is known for its robust performance and versatility in various power management applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Junction Temperature Range | -40°C to 125°C (LTC7801I) | °C |
| Maximum Input Voltage | 150 | V |
| Output Voltage Regulation | 0.800V ± 10% | V |
| Switching Frequency | Programmable up to 2.2MHz | Hz |
| Package Type | 24-QFN (4x5) | |
| Thermal Impedance (θJA) | 33°C/W (TSSOP), 43°C/W (QFN) | °C/W |
| Overtemperature Protection | Yes | |
| Output Overvoltage Protection | Yes |
Key Features
- Constant frequency, current mode step-down architecture
- All N-channel synchronous power MOSFET stage for high efficiency
- Programmable switching frequency up to 2.2MHz
- Output overvoltage protection and overtemperature protection
- Soft-start and regulator shutdown features
- Power Good (PGOOD) pin for monitoring output voltage
- High input voltage capability up to 150V
Applications
The LTC7801IUFD#PBF is suitable for a wide range of power management applications, including but not limited to:
- Industrial power supplies
- Aerospace and defense systems
- Automotive systems
- Telecommunications equipment
- High-reliability DC/DC converters
Q & A
- What is the maximum input voltage for the LTC7801IUFD#PBF?
The maximum input voltage is 150V. - What is the operating junction temperature range for the LTC7801I?
The operating junction temperature range is -40°C to 125°C. - Does the LTC7801IUFD#PBF have overtemperature protection?
Yes, it includes overtemperature protection. - What is the purpose of the Power Good (PGOOD) pin?
The PGOOD pin is used to monitor the output voltage and indicates when it is within ±10% of the 0.8V reference voltage. - Can the switching frequency be programmed?
Yes, the switching frequency can be programmed up to 2.2MHz. - What type of package does the LTC7801IUFD#PBF come in?
The LTC7801IUFD#PBF comes in a 24-QFN (4x5) package. - Does the LTC7801IUFD#PBF have output overvoltage protection?
Yes, it includes output overvoltage protection. - How is the soft-start feature implemented?
The soft-start feature is implemented using the SS pin, which can also be used for regulator shutdown. - What is the thermal impedance (θJA) for the QFN package?
The thermal impedance (θJA) for the QFN package is 43°C/W. - Can the regulator sustain high input voltage transients?
Yes, the regulator can sustain input voltage transients and includes a soft-start reset for graceful recovery.
