LT8614MPUDC#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency synchronous step-down DC/DC converter - Wide input voltage range: 3.4V to 42V - Output current up to 4A - Adjustable output voltage - Low quiescent current - Internal compensation - Programmable soft-start - Fault protection features

Package: QFN-20

Essence: The LT8614MPUDC#TRPBF is a high-performance synchronous step-down DC/DC converter designed for power management applications.

Packaging/Quantity: The LT8614MPUDC#TRPBF is available in a QFN-20 package and is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 3.4V to 42V
• Output Voltage Range: Adjustable
• Maximum Output Current: 4A
• Switching Frequency: Up to 2MHz
• Quiescent Current: 2.5µA
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT8614MPUDC#TRPBF has the following pin configuration:

1. VIN: Input voltage pin
2. SW: Switching node connection
3. GND: Ground reference
4. FB: Feedback pin for output voltage regulation
5. SYNC/SS: Synchronization or soft-start control pin
6. VCC: Supply voltage for internal circuitry
7. PGND: Power ground connection
8. EN/UVLO: Enable pin or undervoltage lockout control
9. SS/TR/PG: Soft-start, tracking, or power good pin
10. VOUT: Output voltage pin

Functional Features

• High efficiency: The LT8614MPUDC#TRPBF utilizes synchronous rectification to achieve high conversion efficiency.
• Wide input voltage range: It can handle input voltages ranging from 3.4V to 42V, making it suitable for a variety of applications.
• Adjustable output voltage: The output voltage can be easily adjusted to meet specific requirements.
• Low quiescent current: The device has a low quiescent current of only 2.5µA, reducing power consumption in standby mode.
• Internal compensation: The LT8614MPUDC#TRPBF features internal compensation, simplifying the design process.
• Programmable soft-start: Soft-start functionality allows for controlled startup and prevents excessive inrush current.
• Fault protection features: The IC includes various fault protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

Advantages and Disadvantages

Advantages: - High efficiency operation - Wide input voltage range - Adjustable output voltage - Low quiescent current - Internal compensation simplifies design - Programmable soft-start for controlled startup - Fault protection features enhance reliability

Disadvantages: - Limited maximum output current (4A)

Working Principles

The LT8614MPUDC#TRPBF is a synchronous step-down DC/DC converter that uses a high-frequency switching technique to efficiently convert input voltage to a lower output voltage. It employs a pulse-width modulation (PWM) control scheme to regulate the output voltage.

When an input voltage is applied, the LT8614MPUDC#TRPBF's internal circuitry generates a PWM signal that controls the switching of the internal power MOSFETs. This switching action converts the input voltage into a series of pulses with a duty cycle determined by the feedback control loop.

The feedback pin (FB) monitors the output voltage and adjusts the duty cycle of the PWM signal to maintain a stable output voltage. The soft-start feature gradually increases the duty cycle during startup to prevent excessive inrush current.

Detailed Application Field Plans

The LT8614MPUDC#TRPBF is suitable for various power management applications, including but not limited to: - Industrial equipment - Automotive systems - Telecom infrastructure - Distributed power supplies - Battery-powered devices - LED lighting

Its wide input voltage range, high efficiency, and compact package make it versatile for different application scenarios.

Detailed and Complete Alternative Models

1. LT8614EUH#PBF: Similar specifications and features, available in a 28-lead thermally enhanced TSSOP package.
2. LT8614IUH#PBF: Similar specifications and features, available in a 28-lead thermally enhanced QFN package.
3. LT8614MPUJ#PBF: Similar specifications and features, available in a 20-lead thermally enhanced QFN package.

These alternative models offer similar functionality and can be considered as substitutes for the LT8614MPUD