LM5088MH-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 - Overvoltage protection - Overcurrent protection

Package: PowerPAD HTSSOP-20

Essence: The LM5088MH-2/NOPB is a high voltage buck controller IC used in power management applications. It offers a wide input voltage range, adjustable output voltage, and various protection features.

Packaging/Quantity: The LM5088MH-2/NOPB is available in a PowerPAD HTSSOP-20 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 4.5V to 75V
• Output Voltage Range: 0.8V to VIN
• Switching Frequency: Up to 1MHz
• Maximum Duty Cycle: 90%
• Operating Temperature Range: -40°C to +125°C
• Quiescent Current: 1.6mA

Pin Configuration

The LM5088MH-2/NOPB has the following pin configuration:

1. VCC: Supply voltage input
2. GND: Ground reference
3. FB: Feedback voltage input
4. COMP: Compensation node for loop stability
5. SS/TR: Soft-start/Tracking input
6. SYNC: Synchronization input
7. RT/CLK: Oscillator timing resistor/capacitor
8. CT: Oscillator timing capacitor
9. PGND: Power ground reference
10. SW: Switch node connection to external MOSFET
11. BOOT: Bootstrap capacitor connection
12. LX: Inductor connection
13. SS/TR: Soft-start/Tracking input
14. SYNC: Synchronization input
15. RT/CLK: Oscillator timing resistor/capacitor
16. CT: Oscillator timing capacitor
17. PGND: Power ground reference
18. SW: Switch node connection to external MOSFET
19. BOOT: Bootstrap capacitor connection
20. LX: Inductor connection

Functional Features

• High voltage operation allows for direct connection to high input voltage sources.
• Current mode control provides excellent line and load regulation.
• Synchronous rectification improves efficiency and reduces power dissipation.
• Programmable soft-start prevents excessive inrush current during startup.
• Overvoltage protection safeguards the system from voltage spikes.
• Overcurrent protection prevents damage due to excessive output current.

Advantages

• Wide input voltage range enables versatile applications.
• Adjustable output voltage allows for customization based on specific requirements.
• Synchronous rectification improves overall efficiency.
• Comprehensive protection features enhance system reliability.
• Compact package size facilitates space-constrained designs.

Disadvantages

• Limited maximum duty cycle may restrict certain applications.
• Higher quiescent current compared to some other buck controllers.
• Requires additional external components for complete circuit implementation.

Working Principles

The LM5088MH-2/NOPB operates as a high voltage buck controller, converting a higher input voltage to a lower output voltage. It utilizes a current mode control scheme to regulate the output voltage and maintain stability. The IC incorporates synchronous rectification to improve efficiency by reducing power losses. It also includes various protection mechanisms such as overvoltage and overcurrent protection to safeguard the system.

Application Field Plans

The LM5088MH-2/NOPB is commonly used in various power management applications, including but not limited to: - Industrial power supplies - Telecom infrastructure - Automotive electronics - LED lighting systems - Battery charging circuits

Alternative Models

• LM5117: High voltage synchronous buck controller with adjustable frequency and current limit.
• LM25085: Wide input voltage range buck controller with integrated high-side and low-side MOSFETs.
• TPS54360: 4.5V to 60V input voltage range buck converter with integrated FETs and adjustable output voltage.

These alternative models offer similar functionality and can be considered as alternatives to the LM5088MH-2/NOPB based on specific application requirements.

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