LTC3611IWP

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency step-down DC/DC converter - Wide input voltage range - Adjustable output voltage - Low quiescent current - Overcurrent and overtemperature protection - Small form factor

Package: 20-Lead Plastic TSSOP

Essence: The LTC3611IWP is a high-performance step-down DC/DC converter designed for power management applications. It offers high efficiency, adjustable output voltage, and various protection features in a compact package.

Packaging/Quantity: The LTC3611IWP is available in a 20-Lead Plastic Thin Shrink Small Outline Package (TSSOP). The quantity per package may vary depending on the supplier.

Specifications

• Input Voltage Range: 2.25V to 5.5V
• Output Voltage Range: 0.6V to VIN
• Maximum Output Current: 4A
• Switching Frequency: Up to 4MHz
• Quiescent Current: 40µA
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LTC3611IWP has a total of 20 pins. Here is the detailed pin configuration:

1. VIN: Input Voltage
2. SW: Switch Node Connection
3. PGND: Power Ground
4. AGND: Analog Ground
5. FB: Feedback Voltage Input
6. SS: Soft-Start Capacitor Connection
7. VCC: IC Supply Voltage
8. EN: Enable Pin
9. SYNC: External Clock Synchronization
10. RT: Oscillator Timing Resistor
11. CT: Oscillator Timing Capacitor
12. BST: Bootstrap Capacitor Connection
13. LX: Inductor Connection
14. VOUT: Output Voltage
15. PGND: Power Ground
16. AGND: Analog Ground
17. FB: Feedback Voltage Input
18. SS: Soft-Start Capacitor Connection
19. VCC: IC Supply Voltage
20. EN: Enable Pin

Functional Features

1. High Efficiency: The LTC3611IWP offers high efficiency conversion, minimizing power losses and maximizing battery life.
2. Adjustable Output Voltage: The output voltage can be adjusted according to the application requirements.
3. Protection Features: The IC includes overcurrent and overtemperature protection, ensuring safe operation under various conditions.
4. Small Form Factor: The compact package allows for space-saving designs in power management applications.

Advantages and Disadvantages

Advantages: - High efficiency conversion - Adjustable output voltage - Overcurrent and overtemperature protection - Compact size

Disadvantages: - Limited input voltage range (2.25V to 5.5V) - Maximum output current limited to 4A

Working Principles

The LTC3611IWP is a step-down DC/DC converter that uses a synchronous buck topology. It operates by switching the input voltage across an inductor and then filtering it to obtain the desired output voltage. The integrated control circuitry ensures efficient power transfer and regulates the output voltage within the specified range. The IC also incorporates protection features to safeguard against overcurrent and overtemperature conditions.

Detailed Application Field Plans

The LTC3611IWP is suitable for a wide range of power management applications, including but not limited to: - Portable electronic devices - Battery-powered systems - Industrial equipment - Automotive electronics - Distributed power systems

Detailed and Complete Alternative Models

1. LTC3611EWP: Similar specifications and features as LTC3611IWP, but with a different package (20-Lead Plastic TSSOP).
2. LTC3611HWP: Higher maximum output current (up to 6A) compared to LTC3611IWP, suitable for applications requiring higher power delivery.
3. LTC3611MWP: Lower quiescent current (20µA) compared to LTC3611IWP, ideal for battery-powered devices where power efficiency is crucial.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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