LTC4444HMS8E#PBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-Speed, High Voltage, Low-Side Gate Driver
• Package: 8-Lead MSOP
• Essence: LTC4444HMS8E#PBF is a high-speed, high voltage, low-side gate driver IC designed for driving N-channel MOSFETs in various power management applications.
• Packaging/Quantity: The LTC4444HMS8E#PBF is available in an 8-Lead MSOP package and is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 4.5V to 18V
• Output Voltage Range: 0V to VCC
• Peak Output Current: ±4A
• Propagation Delay: 15ns
• Rise/Fall Time: 10ns
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LTC4444HMS8E#PBF has the following pin configuration:

1. GATE: Connects to the gate of the external N-channel MOSFET.
2. GND: Ground reference for the IC.
3. VCC: Supply voltage input.
4. VCCSENSE: Sense pin for monitoring the VCC voltage.
5. UVLO: Undervoltage lockout threshold pin.
6. SD: Shutdown pin for disabling the gate driver.
7. BOOT: Bootstrap capacitor connection for high-side gate drive.
8. SOURCE: Source pin for the external N-channel MOSFET.

Functional Features

• High-Speed Operation: The LTC4444HMS8E#PBF offers fast switching speeds with propagation delay and rise/fall times as low as 15ns and 10ns, respectively.
• High Voltage Capability: It can handle supply voltages ranging from 4.5V to 18V, making it suitable for a wide range of applications.
• Low-Side Gate Driver: Designed specifically for driving N-channel MOSFETs on the low side of the circuit.
• Undervoltage Lockout (UVLO): The UVLO feature ensures that the gate driver operates only when the supply voltage is above a certain threshold, preventing improper operation during low voltage conditions.
• Shutdown Functionality: The SD pin allows for easy shutdown and disabling of the gate driver.

Advantages

• Fast switching speeds enable efficient power management and reduce switching losses.
• Wide supply voltage range provides flexibility in various applications.
• Low-side gate driver design simplifies circuit implementation.
• UVLO feature protects against improper operation during low voltage conditions.
• Shutdown functionality allows for easy control and power saving.

Disadvantages

• Limited to driving N-channel MOSFETs on the low side, not suitable for high-side applications.
• May require additional external components for proper operation in specific applications.

Working Principles

The LTC4444HMS8E#PBF is a high-speed, high voltage, low-side gate driver IC. It is designed to drive N-channel MOSFETs on the low side of the circuit. By providing fast switching speeds and a wide supply voltage range, it enables efficient power management in various applications. The UVLO feature ensures proper operation by monitoring the supply voltage, while the shutdown pin allows for easy control and power saving.

Detailed Application Field Plans

The LTC4444HMS8E#PBF is commonly used in the following application fields:

1. Power Supplies: It can be used in DC-DC converters, switch-mode power supplies, and other power management systems.
2. Motor Control: It is suitable for driving MOSFETs in motor control circuits, such as brushless DC motors and stepper motors.
3. LED Lighting: The LTC4444HMS8E#PBF can be utilized in LED driver circuits for efficient control of LED lighting systems.
4. Automotive Electronics: It finds applications in automotive power management systems, including electric vehicles and hybrid electric vehicles.

Detailed and Complete Alternative Models

1. LTC4444IMS8E#PBF: Similar to LTC4444HMS8E#PBF but available in an 8-Lead MSOP package.
2. LTC4444CMS8E#PBF: Similar to LTC4444HMS8E#PBF but available in a 10-Lead MSOP package.
3. LTC4444HMS8#TRPBF: Similar to LTC4444HMS8E#PBF but sold in tape and reel packaging.

These alternative models offer similar functionality and characteristics to the LTC4444HMS8E#PBF, providing options for different package preferences or quantity requirements.

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