LT3640IFE#PBF

Product Overview

Category

LT3640IFE#PBF belongs to the category of integrated circuits (ICs).

Use

The LT3640IFE#PBF is a high voltage, low quiescent current step-down DC/DC converter. It is designed for use in various applications where efficient power conversion is required.

Characteristics

• High voltage input range: The LT3640IFE#PBF can accept input voltages ranging from 4V to 60V.
• Low quiescent current: It has a low quiescent current of only 20µA, making it suitable for battery-powered applications.
• Adjustable output voltage: The output voltage can be adjusted from 1.25V to 55V using external resistors.
• High efficiency: The LT3640IFE#PBF offers high efficiency up to 94%, ensuring minimal power loss during operation.
• Package: The LT3640IFE#PBF comes in a 16-lead TSSOP package.

Packaging/Quantity

The LT3640IFE#PBF is available in tape and reel packaging. Each reel contains 250 units of the IC.

Specifications

• Input Voltage Range: 4V to 60V
• Output Voltage Range: 1.25V to 55V
• Quiescent Current: 20µA
• Efficiency: Up to 94%
• Package Type: 16-Lead TSSOP

Detailed Pin Configuration

The LT3640IFE#PBF has a total of 16 pins. Here is the detailed pin configuration:

1. VIN: Input voltage pin
2. SW: Switching node connection
3. GND: Ground reference
4. FB: Feedback pin for adjusting the output voltage
5. SS/TR: Soft-start/tracking pin
6. VCC: Internal bias voltage pin
7. SYNC/SS: Synchronization or soft-start control pin
8. PGND: Power ground reference
9. LX: Inductor connection
10. LX: Inductor connection
11. LX: Inductor connection
12. LX: Inductor connection
13. LX: Inductor connection
14. LX: Inductor connection
15. LX: Inductor connection
16. LX: Inductor connection

Functional Features

• Wide input voltage range allows for versatile applications.
• Adjustable output voltage provides flexibility in power supply design.
• Low quiescent current ensures minimal power consumption during standby or idle mode.
• High efficiency reduces power loss and improves overall system performance.
• Soft-start feature enables controlled startup, preventing excessive inrush current.

Advantages and Disadvantages

Advantages

• Wide input voltage range makes it suitable for various applications.
• Adjustable output voltage offers flexibility in power supply design.
• Low quiescent current minimizes power consumption.
• High efficiency results in reduced power loss.
• Soft-start feature prevents excessive inrush current.

Disadvantages

• Limited maximum output voltage of 55V may not be suitable for certain high voltage applications.
• The 16-lead TSSOP package may require careful PCB layout to ensure proper heat dissipation.

Working Principles

The LT3640IFE#PBF operates as a step-down DC/DC converter using a synchronous buck topology. It converts a higher input voltage to a lower output voltage by controlling the duty cycle of the internal switches. The feedback pin (FB) is used to adjust the output voltage, while the soft-start/tracking pin (SS/TR) controls the startup behavior. The IC utilizes a high switching frequency to achieve high efficiency and compact size.

Detailed Application Field Plans

The LT3640IFE#PBF can be used in various applications, including but not limited to: - Industrial automation systems - Automotive electronics - Telecommunications equipment - Power supply modules - Battery-powered devices

Detailed and Complete Alternative Models

1. LT3640IFE#TRPBF: Similar to LT3640IFE#PBF, but available in tape and reel packaging with 1500 units per reel.
2. LT3640HFE#PBF: High voltage version of LT3640IFE#PBF, with an extended input voltage range up to 80V.
3. LT3640IFE#PBF-1: Improved version with lower quiescent current and higher efficiency.

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

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