TPS53128PW

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Wide Input Voltage Range, Synchronous Buck Converter
• Package: PowerPAD HTSSOP-20
• Essence: DC/DC Converter
• Packaging/Quantity: Tube/90 pieces per tube

Specifications

• Input Voltage Range: 4.5V to 17V
• Output Voltage Range: 0.6V to 5.5V
• Output Current: Up to 30A
• Switching Frequency: Adjustable up to 1.5MHz
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The TPS53128PW has a total of 20 pins. The pin configuration is as follows:

1. VIN: Input voltage pin
2. PGND: Power ground pin
3. BOOT: Bootstrap capacitor connection pin
4. PH: Phase node for high-side MOSFET
5. LGND: Logic ground pin
6. VCC: Supply voltage for control circuitry
7. FB: Feedback voltage input pin
8. SS/TR: Soft-start and tracking pin
9. EN: Enable pin
10. PGOOD: Power good indicator output pin
11. ITH: Current sense threshold setting pin
12. COMP: Compensation pin
13. RT: Oscillator frequency setting resistor pin
14. SS: Soft-start capacitor connection pin
15. SW: Switching node pin
16. SW: Switching node pin
17. SW: Switching node pin
18. SW: Switching node pin
19. SW: Switching node pin
20. SW: Switching node pin

Functional Features

• Integrated synchronous buck converter
• Adaptive on-time control architecture
• Voltage mode control with feed-forward compensation
• Adjustable switching frequency
• Programmable soft-start and tracking
• Overcurrent protection
• Thermal shutdown protection
• Power good indicator

Advantages and Disadvantages

Advantages

• High efficiency, reducing power dissipation
• Wide input voltage range, suitable for various applications
• Compact package size, saving board space
• Integrated protection features enhance system reliability
• Adjustable switching frequency allows optimization for different requirements

Disadvantages

• Limited output current compared to some high-power applications
• Requires external components for operation
• Higher cost compared to non-integrated solutions

Working Principles

The TPS53128PW is a synchronous buck converter that converts a higher input voltage to a lower output voltage. It utilizes an adaptive on-time control architecture and voltage mode control with feed-forward compensation to regulate the output voltage. The integrated MOSFETs provide high efficiency by minimizing power losses during switching.

The device operates by controlling the duty cycle of the high-side and low-side MOSFETs based on the feedback voltage from the output. The switching frequency can be adjusted to optimize efficiency and minimize output voltage ripple. Soft-start and tracking features ensure a controlled startup and enable sequencing in multi-rail power systems.

Detailed Application Field Plans

The TPS53128PW is commonly used in various applications requiring efficient power management. Some typical application fields include:

1. Telecommunications equipment
2. Networking devices
3. Industrial automation systems
4. Server and storage systems
5. Automotive electronics
6. Consumer electronics

Detailed and Complete Alternative Models

• TPS53114PW: Similar specifications but lower output current capability
• TPS53355PW: Higher output current capability but larger package size
• TPS54332PW: Lower output current capability but smaller package size

These alternative models offer different trade-offs in terms of output current, package size, and cost, allowing designers to choose the most suitable option for their specific requirements.

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