LM5023MMX-2/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High voltage buck controller - Wide input voltage range - Adjustable output voltage - Current mode control - Synchronous rectification - Programmable soft-start - Overcurrent protection - Thermal shutdown protection

Package: 8-pin VSSOP

Essence: The LM5023MMX-2/NOPB is a high voltage buck controller IC designed for power management applications. It provides efficient and reliable control over the voltage conversion process, making it suitable for various power supply designs.

Packaging/Quantity: The LM5023MMX-2/NOPB is available in a 8-pin VSSOP package. It is typically sold in reels containing a quantity of 2500 units.

Specifications

• Input Voltage Range: 4.5V to 100V
• Output Voltage Range: 0.8V to 90% of VIN
• Switching Frequency: Up to 1MHz
• Maximum Duty Cycle: 90%
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM5023MMX-2/NOPB has the following pin configuration:

1. COMP: Compensation pin for loop stability.
2. FB: Feedback pin for regulating the output voltage.
3. CS: Current sense pin for current mode control.
4. SS/TR: Soft-start/Tracking pin for controlling the startup behavior.
5. GND: Ground reference for the IC.
6. DRVH: High-side gate driver output.
7. DRVL: Low-side gate driver output.
8. VIN: Input voltage pin.

Functional Features

• High Voltage Operation: The LM5023MMX-2/NOPB can handle input voltages ranging from 4.5V to 100V, making it suitable for a wide range of applications.
• Current Mode Control: The IC utilizes current mode control for improved stability and transient response.
• Synchronous Rectification: It supports synchronous rectification, which enhances efficiency by reducing power losses.
• Programmable Soft-Start: The soft-start feature allows for controlled startup, preventing excessive inrush currents.
• Overcurrent Protection: The IC incorporates overcurrent protection to safeguard the circuit from excessive current flow.
• Thermal Shutdown Protection: It includes thermal shutdown protection to prevent damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Wide input voltage range enables versatile application possibilities. - Current mode control provides enhanced stability and transient response. - Synchronous rectification improves overall efficiency. - Programmable soft-start prevents inrush currents during startup. - Overcurrent and thermal shutdown protection ensure system reliability.

Disadvantages: - Limited maximum duty cycle may restrict certain applications requiring higher duty cycles. - Availability in only one package option may limit flexibility in board layout.

Working Principles

The LM5023MMX-2/NOPB operates as a high voltage buck controller. It regulates the output voltage by controlling the switching of an external power MOSFET. The IC uses current mode control to maintain stable operation and achieve fast transient response. By adjusting the duty cycle of the switching signal, the desired output voltage is achieved. The synchronous rectification feature reduces power losses by utilizing a low-side MOSFET to replace the diode typically used in non-synchronous designs.

Detailed Application Field Plans

The LM5023MMX-2/NOPB can be applied in various power management scenarios, including but not limited to: 1. Industrial power supplies 2. Telecom infrastructure 3. Automotive electronics 4. LED lighting systems 5. Renewable energy systems

Detailed and Complete Alternative Models

1. LM5023: Similar to LM5023MMX-2/NOPB, but available in a different package (SOIC-8).
2. LM5024: Buck controller IC with similar features, but optimized for lower input voltage range (up to 75V).
3. LM5030: High voltage buck controller with additional integrated features such as adjustable slope compensation and frequency synchronization.

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

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