Overview
The LT8390EFE#PBF, 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 features a proprietary peak current mode architecture, which allows it to operate in both discontinuous conduction mode (DCM) and pulse-skipping mode (PSM), enhancing light load efficiency. The LT8390 is particularly suited for high power voltage regulator circuits and applications requiring output current regulation, such as battery chargers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4V to 60V | V |
| Output Voltage Range | Programmable | V |
| Switching Frequency | Up to 400kHz | Hz |
| Maximum Output Current | Up to 20A (depending on configuration) | A |
| Package Type | 28-Lead Plastic TSSOP or QFN | |
| Operating Temperature Range | -40°C to 125°C (or 150°C for certain versions) | °C |
| Absolute Maximum Ratings (VIN, EN/UVLO, VOUT) | 60V | V |
| Absolute Maximum Ratings (BST1, BST2) | 66V | V |
Key Features
- Proprietary peak current mode buck-boost architecture for smooth transition between constant-voltage and constant-current operation.
- Operates in discontinuous conduction mode (DCM) or pulse-skipping mode (PSM) for enhanced light load efficiency.
- Spread spectrum frequency modulation to improve EMI performance.
- PGOOD status flag indicates when output voltage is within ±10% of the final regulation voltage.
- Soft-start capability programmed by a capacitor at the SS pin.
- Fault protection modes: hiccup, latch-off, and keep-running).
- Output current monitoring and limiting).
- AEC-Q101 MOSFETs for automotive applications).
Applications
- High power voltage regulator circuits.
- Battery chargers and other applications requiring output current regulation.
- Automotive systems (with AEC-Q101 qualified versions).
- Industrial power supplies where input voltage can vary widely.
- Renewable energy systems, such as solar or wind power converters.
Q & A
- What is the input voltage range of the LT8390EFE#PBF?
The input voltage range is from 4V to 60V.
- What are the key operating modes of the LT8390EFE#PBF?
The device operates in discontinuous conduction mode (DCM) or pulse-skipping mode (PSM).
- How does the LT8390EFE#PBF improve EMI performance?
It uses spread spectrum frequency modulation to improve EMI performance.
- What is the purpose of the PGOOD status flag?
The PGOOD status flag indicates when the output voltage is within ±10% of the final regulation voltage.
- How is soft-start programmed in the LT8390EFE#PBF?
Soft-start is programmed by a capacitor at the SS pin.
- What fault protection modes are available in the LT8390EFE#PBF?
The device offers hiccup, latch-off, and keep-running fault protection modes.
- Can the LT8390EFE#PBF be used in automotive applications?
Yes, AEC-Q101 qualified versions are available for automotive applications.
- What is the maximum switching frequency of the LT8390EFE#PBF?
The maximum switching frequency is up to 400kHz.
- What are the available package types for the LT8390EFE#PBF?
The device is available in 28-Lead Plastic TSSOP or QFN packages.
- What is the operating temperature range of the LT8390EFE#PBF?
The operating temperature range is -40°C to 125°C (or 150°C for certain versions).
