Overview
The LT8392EFE#PBF, produced by Analog Devices Inc., is a synchronous 4-switch buck-boost DC/DC controller. This component is designed to regulate output voltage, input or output current from input voltages 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 smooth transitions between different operation regions. The LT8392 is ideal for various applications, including voltage regulators, battery and super-capacitor chargers, and systems in automotive, industrial, telecom, and battery-powered environments.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply VIN Operating Voltage Range | EXTVCC = 0V | 3 | 60 | V | |
| Supply VIN Operating Voltage Range | EXTVCC = 8V | 4 | 60 | V | |
| VIN Shutdown Current | VEN/UVLO = 0.3V | 1 | 2 | µA | |
| VIN Active Current (Not Switching) | VEN/UVLO = 1.5V, EXTVCC = 0V | 2 | 250 | µA | |
| VIN Active Current (Not Switching) | VEN/UVLO = 1.5V, EXTVCC = 8V | 3 | 500 | µA | |
| EXTVCC Voltage Range | 0 | 40 | V | ||
| Output Voltage Range | 1 | 60 | V | ||
| Output Voltage Accuracy | ±1.5% | ||||
| Input or Output Current Accuracy | ±4% | ||||
| Operating Junction Temperature Range | –40°C | 125°C |
Key Features
- Proprietary peak-buck peak-boost current mode control scheme for smooth transitions between operation regions.
- Adjustable and synchronizable frequency operation from 150kHz to 650kHz, or internal ±15% triangle spread spectrum operation for low EMI.
- Up to 98% efficiency and seamless low noise transitions.
- Wide input voltage range: 3V to 60V (with EXTVCC ≥ 4.5V for 3V input).
- Output voltage range: 1V to 60V with ±1.5% accuracy.
- Input or output current monitoring and power good flag).
- Fault protection functions including output short-circuit detection and adjustable fault modes (hiccup, latch-off, keep-running)).
- Integrated bootstrap diodes and available in 28-Lead TSSOP with exposed pad and 28-Lead QFN (4mm × 5mm) packages).
Applications
- Voltage regulators in automotive, industrial, and telecom systems).
- Battery and super-capacitor chargers).
- Battery-powered systems and high-frequency battery-powered systems).
- Automotive, industrial, and telecom systems requiring efficient and reliable power management).
Q & A
- What is the input voltage range of the LT8392?
The LT8392 has an input voltage range of 3V to 60V, with the requirement that EXTVCC must be ≥ 4.5V for 3V input).
- What is the output voltage range of the LT8392?
The output voltage range is from 1V to 60V with ±1.5% accuracy).
- What is the efficiency of the LT8392?
The LT8392 can achieve up to 98% efficiency).
- What are the fault protection modes available in the LT8392?
The LT8392 offers three fault protection modes during output short-circuit conditions: hiccup, latch-off, and keep-running, adjustable via a single resistor from SS to VREF).
- What are the package options for the LT8392?
The LT8392 is available in 28-Lead TSSOP with exposed pad and 28-Lead QFN (4mm × 5mm) packages).
- What is the operating junction temperature range for the LT8392?
The operating junction temperature range is –40°C to 125°C for the E grade and –40°C to 150°C for the J and H grades).
- Does the LT8392 support spread spectrum frequency modulation?
Yes, the LT8392 supports internal ±15% triangle spread spectrum operation for low EMI).
- Can the LT8392 be used in automotive applications?
Yes, the LT8392 is suitable for use in automotive, industrial, and telecom systems).
- How does the LT8392 handle overvoltage conditions?
During an overvoltage condition (VFB > 1.08V), the LT8392 turns off all TG1, BG1, TG2, and BG2 switches).
- What is the purpose of the FB pin in the LT8392?
The FB pin is used for constant-voltage regulation and output fault protection, regulating VFB to 1.00V through the DC/DC converter).
