LTC4359IS8#PBF

Product Overview

Category

LTC4359IS8#PBF belongs to the category of power management integrated circuits (PMICs).

Use

This product is primarily used for power supply protection and load sharing in various electronic devices.

Characteristics

• Power supply protection: LTC4359IS8#PBF provides protection against reverse voltage, overvoltage, undervoltage, and overcurrent conditions.
• Load sharing: It enables seamless load sharing between multiple power sources.
• Package: The LTC4359IS8#PBF comes in an 8-pin small outline integrated circuit (SOIC) package.
• Essence: This PMIC ensures reliable and efficient power management in electronic systems.
• Packaging/Quantity: The LTC4359IS8#PBF is typically sold in reels containing a specified quantity of units.

Specifications

The LTC4359IS8#PBF has the following specifications:

• Input Voltage Range: 2.5V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Maximum Continuous Current: 4A
• Reverse Voltage Protection Threshold: -40mV
• Overvoltage Protection Threshold: 5.5V
• Undervoltage Protection Threshold: 2.5V
• Quiescent Current: 50µA

Detailed Pin Configuration

The LTC4359IS8#PBF has the following pin configuration:

1. GATE: Gate control pin for external N-channel MOSFET.
2. VIN: Positive input voltage pin.
3. VOUT: Output voltage pin.
4. GND: Ground pin.
5. FB: Feedback pin for output voltage regulation.
6. EN: Enable pin for device operation.
7. SS: Soft-start pin for controlling the output voltage rise time.
8. FLT: Fault indicator pin for reporting protection events.

Functional Features

The LTC4359IS8#PBF offers the following functional features:

1. Reverse Voltage Protection: It prevents damage to the circuit by blocking reverse voltage.
2. Overvoltage and Undervoltage Protection: The PMIC safeguards the system by limiting the input voltage within safe limits.
3. Overcurrent Protection: It monitors the current flow and protects against excessive currents.
4. Load Sharing: The device enables seamless sharing of load between multiple power sources, ensuring efficient power distribution.
5. Fault Indication: The FLT pin provides a signal indicating any protection events or faults.

Advantages and Disadvantages

Advantages

• Robust protection against reverse voltage, overvoltage, undervoltage, and overcurrent conditions.
• Seamless load sharing capability.
• Compact and easy-to-use SOIC package.
• Low quiescent current for power efficiency.

Disadvantages

• Limited maximum continuous current of 4A.
• Restricted input voltage range of 2.5V to 5.5V.

Working Principles

The LTC4359IS8#PBF operates by continuously monitoring the input voltage and current. It compares these values with the predefined thresholds for reverse voltage, overvoltage, undervoltage, and overcurrent protection. If any of these thresholds are exceeded, the PMIC takes appropriate action to protect the system. Additionally, it facilitates load sharing by dynamically adjusting the current flow from different power sources.

Detailed Application Field Plans

The LTC4359IS8#PBF finds applications in various electronic systems requiring power supply protection and load sharing. Some specific application fields include:

1. Battery-powered devices: Ensures safe and efficient power management in portable electronics such as smartphones, tablets, and wearables.
2. Industrial equipment: Protects sensitive components in industrial machinery from voltage fluctuations and overcurrent conditions.
3. Automotive electronics: Safeguards automotive systems from reverse voltage and overvoltage events, enhancing overall reliability.
4. Power distribution systems: Enables load sharing between multiple power sources in data centers, telecom infrastructure, and renewable energy systems.

Detailed and Complete Alternative Models

1. LTC4359HS8#PBF: Similar to LTC4359IS8#PBF but operates at a higher temperature range of -40°C to 125°C.
2. LTC4359IMS8#PBF: A smaller package variant of LTC4359IS8#PBF, available in a 10-pin MSOP package.
3. LTC4359CS8#PBF: Offers similar functionality but with a lower maximum continuous current rating of 2A.

These alternative models provide flexibility in choosing the most suitable PMIC based on specific application requirements.

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