Overview
The LT8390EUFD#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-buck/peak-boost current mode control scheme, allowing for adjustable and synchronizable frequency operation between 150kHz to 650kHz, or internal ±15% triangle spread spectrum frequency modulation to reduce EMI. The LT8390 is suitable for a wide range of applications, including voltage regulators, battery and supercapacitor chargers, and systems in automotive, industrial, telecom, and battery-powered environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4V to 60V | V |
| Output Voltage Capability | 0V to 60V | V |
| Switching Frequency Range | 150kHz to 650kHz | Hz |
| Spread Spectrum Frequency Modulation | ±15% | % |
| Absolute Maximum Ratings (VIN, EN/UVLO, VOUT, ISP, ISN) | 60V | V |
| Operating Temperature Range | –40°C to 125°C (or 150°C for certain packages) | °C |
| Package Type | 28-Lead Plastic TSSOP or QFN |
Key Features
- Synchronous 4-switch buck-boost topology for efficient voltage regulation.
- Adjustable and synchronizable switching frequency from 150kHz to 650kHz.
- Internal ±15% triangle spread spectrum frequency modulation for reduced EMI.
- Input or output current monitoring and power good flag.
- Fault protection including output short-circuit detection and various fault modes (hiccup, latch-off, keep-running).
- Seamless low noise transitions between operation regions.
- Support for automotive, industrial, telecom, and battery-powered system applications.
Applications
- Voltage regulators in various power systems.
- Battery and supercapacitor chargers.
- Automotive systems, including electric vehicles and hybrid vehicles.
- Industrial power supplies and control systems.
- Telecom power systems and network equipment.
- Battery-powered systems, such as portable electronics and renewable energy systems.
Q & A
- What is the input voltage range of the LT8390?
The input voltage range of the LT8390 is from 4V to 60V.
- What are the output voltage capabilities of the LT8390?
The LT8390 can regulate output voltages from 0V to 60V.
- What is the switching frequency range of the LT8390?
The switching frequency range is adjustable from 150kHz to 650kHz.
- Does the LT8390 support spread spectrum frequency modulation?
Yes, it supports internal ±15% triangle spread spectrum frequency modulation for reduced EMI.
- What types of fault protection does the LT8390 offer?
The LT8390 offers fault protection including output short-circuit detection and various fault modes such as hiccup, latch-off, and keep-running.
- What are the typical applications of the LT8390?
Typical applications include voltage regulators, battery and supercapacitor chargers, and systems in automotive, industrial, telecom, and battery-powered environments.
- What package types are available for the LT8390?
The LT8390 is available in 28-Lead Plastic TSSOP and QFN packages.
- What is the operating temperature range of the LT8390?
The operating temperature range is from –40°C to 125°C (or 150°C for certain packages).
- Does the LT8390 support current monitoring?
Yes, it supports input or output current monitoring and provides a power good flag.
- Is the LT8390 suitable for automotive applications?
Yes, it is suitable for automotive applications and is available in versions with controlled manufacturing to support automotive reliability requirements.
