Overview
The LT8390EFE#TRPBF, produced by Analog Devices Inc., is a synchronous 4-switch buck-boost DC/DC controller. This device is designed to regulate output voltage, input or output current from an input voltage that can be above, below, or equal to the output voltage. It is highly versatile and suitable for a wide range of power management applications, including those in automotive and industrial environments.
Key Specifications
| Parameter | Typical Value | Min | Max |
|---|---|---|---|
| Input Voltage Range | - | 4V | 60V |
| INTVCC Load Regulation | - | - | 1.4% (IINTVCC = 0mA to 80mA) |
| INTVCC Line Regulation | - | - | 1.4% (IINTVCC = 20mA, VIN = 6V to 60V) |
| INTVCC Current Limit | - | 80mA | 160mA |
| INTVCC Dropout Voltage | - | - | 160mV (IINTVCC = 20mA, VIN = 4V) |
| INTVCC Undervoltage Lockout Threshold | - | 3.44V | 3.64V |
| VREF Regulation Voltage | - | 1.97V | 2.03V |
| VREF Load Regulation | - | - | 0.4% (IVREF = 0mA to 1mA) |
| VREF Line Regulation | - | - | 0.1% to 0.2% (IVREF = 100µA, VIN = 4V to 60V) |
| Operating Temperature Range | - | -40°C | 125°C (or 150°C for certain packages) |
| Package Type | - | - | 28-Lead Plastic TSSOP or 28-Lead (4mm × 5mm) Plastic QFN |
Key Features
- Synchronous 4-Switch Buck-Boost Operation: Allows for efficient voltage regulation whether the input voltage is above, below, or equal to the output voltage.
- Constant Voltage and Current Regulation: Can regulate output voltage or input/output current with high accuracy.
- Fault Protection Modes: Supports hiccup, latch-off, and keep-running modes during output short-circuit conditions.
- Light Load Efficiency: Operates in discontinuous conduction mode or pulse-skipping mode at light loads to maintain efficiency.
- Wide Operating Temperature Range: Available in versions with operating temperature ranges from -40°C to 125°C or -40°C to 150°C.
- Automotive Grade: Versions available with controlled manufacturing to support automotive applications, qualified per AEC-Q100.
Applications
- Automotive Systems: Suitable for various automotive power management needs due to its robustness and compliance with automotive standards.
- Industrial Power Supplies: Used in industrial power supplies where input voltage can vary widely and high reliability is required.
- Battery Management Systems: Can be used in battery management systems to regulate charging and discharging currents.
- Renewable Energy Systems: Applicable in renewable energy systems such as solar and wind power where input voltage can fluctuate.
Q & A
- What is the input voltage range of the LT8390EFE#TRPBF?
The input voltage range is from 4V to 60V.
- What types of regulation does the LT8390 support?
The LT8390 supports constant voltage and constant current regulation.
- What are the fault protection modes available in the LT8390?
The LT8390 supports hiccup, latch-off, and keep-running modes during output short-circuit conditions.
- What is the operating temperature range of the LT8390EFE#TRPBF?
The operating temperature range is from -40°C to 125°C or -40°C to 150°C depending on the package.
- Is the LT8390 suitable for automotive applications?
Yes, versions of the LT8390 are available with controlled manufacturing to support automotive applications and are qualified per AEC-Q100.
- What package types are available for the LT8390EFE#TRPBF?
The device is available in 28-Lead Plastic TSSOP and 28-Lead (4mm × 5mm) Plastic QFN packages.
- How does the LT8390 handle light load conditions?
The LT8390 operates in discontinuous conduction mode or pulse-skipping mode at light loads to maintain efficiency.
- What is the VREF regulation voltage of the LT8390?
The VREF regulation voltage is between 1.97V and 2.03V.
- Does the LT8390 have undervoltage lockout protection?
Yes, the LT8390 has undervoltage lockout protection for both INTVCC and VREF.
- How can the fault protection mode be set in the LT8390?
The fault protection mode can be set using a single resistor from the SS pin to VREF, allowing for hiccup, latch-off, or keep-running modes.
