LTC3828EUH

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Wide Input Voltage Range, Synchronous Buck-Boost DC/DC Converter
• Package: 38-Lead 5mm × 7mm QFN
• Essence: Regulates and converts power efficiently in various applications
• Packaging/Quantity: Tube packaging, quantity varies based on supplier

Specifications

• Input Voltage Range: 2.8V to 36V
• Output Voltage Range: 0.8V to 36V
• Maximum Output Current: 4A
• Switching Frequency: Adjustable up to 2MHz
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

1. VIN: Input Voltage
2. GND: Ground
3. SW: Switch Node
4. FB: Feedback Voltage
5. VOUT: Output Voltage
6. SS: Soft-Start
7. PGND: Power Ground
8. SYNC/MODE: Synchronization/MODE Control
9. RT/CLKOUT: Resistor Timing/Clock Output
10. CLKIN: Clock Input
11. PGOOD: Power Good Indicator
12. EN/UVLO: Enable/Undervoltage Lockout
13. VCC: Supply Voltage
14. BST: Bootstrap Capacitor Connection
15. LX: Inductor Connection
16. COMP: Compensation

Functional Features

• Synchronous buck-boost architecture for seamless voltage regulation
• Wide input voltage range allows operation from various power sources
• High efficiency conversion minimizes power loss
• Adjustable switching frequency for optimization of performance
• Soft-start feature prevents excessive inrush current during startup
• Power good indicator ensures reliable operation
• Enable and undervoltage lockout for enhanced system protection

Advantages and Disadvantages

Advantages

• Versatile power management solution for a wide range of applications
• High efficiency leads to reduced power consumption and heat dissipation
• Wide input voltage range accommodates different power sources
• Adjustable switching frequency allows optimization for specific requirements
• Compact package size enables space-saving designs

Disadvantages

• Limited maximum output current may not be suitable for high-power applications
• Requires careful consideration of external components for optimal performance
• Higher cost compared to non-synchronous buck-boost converters

Working Principles

The LTC3828EUH is a synchronous buck-boost DC/DC converter that regulates the output voltage by adjusting the duty cycle of the internal switches. It operates by continuously monitoring the feedback voltage (FB) and comparing it with a reference voltage. Based on this comparison, the controller adjusts the switch duty cycle to maintain the desired output voltage.

During operation, the input voltage (VIN) is converted to a regulated output voltage (VOUT) through the inductor (LX) and the internal switches. The switching frequency can be adjusted to optimize efficiency and performance. The soft-start feature gradually ramps up the output voltage to prevent excessive inrush current during startup.

Detailed Application Field Plans

The LTC3828EUH is widely used in various applications that require efficient power management. Some common application fields include:

1. Battery-powered devices: Portable electronics, handheld instruments, and battery-operated systems benefit from the wide input voltage range and high efficiency of the LTC3828EUH.
2. Automotive systems: The converter's ability to operate over a wide temperature range makes it suitable for automotive applications such as infotainment systems, lighting controls, and power distribution modules.
3. Industrial equipment: Power supplies, motor control systems, and industrial automation equipment can utilize the LTC3828EUH for efficient power conversion and voltage regulation.
4. Telecommunications: The converter can be employed in telecom infrastructure, base stations, and networking equipment to ensure stable and reliable power delivery.

Detailed and Complete Alternative Models

1. LTC3780EUH: Similar synchronous buck-boost DC/DC converter with a higher maximum output current of 6A.
2. LTC3115-1EDD: Buck-boost converter with a lower input voltage range but higher switching frequency for compact designs.
3. LT8390MPMSE#PBF: Synchronous buck-boost controller with a wider input voltage range and higher efficiency.

These alternative models offer different specifications and features, allowing designers to choose the most suitable option based on their specific requirements.

Word count: 529 words