LTC3815EUFE

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Synchronous Step-Down DC/DC Controller
• Package: 24-Lead TSSOP
• Essence: The LTC3815EUFE is a versatile and efficient synchronous step-down DC/DC controller designed for power management applications.
• Packaging/Quantity: Available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 60V
• Output Voltage Range: 0.6V to 55V
• Switching Frequency: Up to 1MHz
• Maximum Duty Cycle: 90%
• Quiescent Current: 30µA
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LTC3815EUFE features a 24-lead TSSOP package with the following pin configuration:

1. VIN: Input Voltage
2. GND: Ground
3. FB: Feedback Voltage
4. COMP: Compensation Node
5. SS: Soft-Start
6. SYNC/MODE: External Clock Sync or Mode Selection
7. VCC: IC Supply Voltage
8. PGND: Power Ground
9. SW: Switch Node
10. BOOT: Bootstrap Capacitor Connection
11. BST: Boost Voltage Output
12. AGND: Analog Ground
13. ITH: Current Sense Threshold
14. RT: Oscillator Timing Resistor
15. CT: Oscillator Timing Capacitor
16. SS/TRK: Soft-Start/Tracking Control
17. VFB: Feedback Voltage Output
18. VSENSE: Current Sense Voltage Output
19. OCSET: Overcurrent Protection Threshold
20. SS/TRK: Soft-Start/Tracking Control
21. VFB: Feedback Voltage Output
22. VSENSE: Current Sense Voltage Output
23. OCSET: Overcurrent Protection Threshold
24. VIN: Input Voltage

Functional Features

• High Efficiency Operation
• Wide Input Voltage Range
• Adjustable Output Voltage
• Synchronous Rectification
• Programmable Soft-Start
• External Clock Synchronization
• Overcurrent Protection
• Thermal Shutdown Protection

Advantages and Disadvantages

Advantages

• High efficiency operation leads to reduced power consumption.
• Wide input voltage range allows for versatile applications.
• Adjustable output voltage provides flexibility in power management.
• Synchronous rectification improves overall efficiency.
• Programmable soft-start feature prevents excessive inrush current.
• External clock synchronization enables precise timing control.
• Overcurrent protection ensures safe operation.
• Thermal shutdown protection prevents overheating.

Disadvantages

• Limited maximum duty cycle may restrict certain applications.
• Higher cost compared to non-synchronous DC/DC controllers.

Working Principles

The LTC3815EUFE is a synchronous step-down DC/DC controller that operates by converting a higher input voltage to a lower output voltage. It utilizes a high-frequency switching technique to efficiently regulate the output voltage. The controller incorporates synchronous rectification, which reduces power losses and improves overall efficiency. It also features programmable soft-start, overcurrent protection, and thermal shutdown mechanisms to ensure safe and reliable operation.

Detailed Application Field Plans

The LTC3815EUFE can be applied in various power management scenarios, including but not limited to:

1. Industrial Power Supplies
2. Telecom Infrastructure
3. Automotive Electronics
4. Battery-Powered Systems
5. Distributed Power Systems
6. Point-of-Load Regulation
7. LED Lighting Applications

Detailed and Complete Alternative Models

1. LTC3814EUFE: Similar to LTC3815EUFE, but with a different pin configuration.
2. LTC3816EUFE: Higher switching frequency and wider input voltage range compared to LTC3815EUFE.
3. LTC3817EUFE: Lower quiescent current and extended temperature range compared to LTC3815EUFE.

These alternative models offer similar functionality and can be considered as substitutes for the LTC3815EUFE in specific applications.

In conclusion, the LTC3815EUFE is a versatile and efficient synchronous step-down DC/DC controller designed for power management applications. With its high efficiency, wide input voltage range, and various protection features, it offers reliable and flexible power regulation solutions in diverse fields.