Texas Instruments TPS40051 manual Dynamic Warnings and Restrictions

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DYNAMIC WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of 0 VDC to 14 VDC.

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than 50° C. The EVM is designed to operate properly with certain components above 50° C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

Copyright 2003, Texas Instruments Incorporated

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Contents User’s Guide EVM Important Notice Dynamic Warnings and Restrictions Introduction FeaturesTPS40051EVM-001 SLUP195 Schematic Schematic+ R2 + f 17.82 10 *6 * 23 k Component SelectionTPS40051 Device Selection Frequency of OperationUvlo Circuitry Inductance ValueInput capacitor selection Mosfet selection Output Capacitor SelectionShort Circuit Protection Snubber Component SelectionCompensation Components Oscilloscope Probe Test Jacks Test SetupDC Input Source Output LoadEfficiency and Power Loss Test Results / Performance DataClosed Loop Performance Output Ripple and Transient Response EVM Assembly Drawing and PCB LayoutTop Side Copper Internal Layer 2 Copper TPS40051EVM-001 SLUP195 List of Materials List of MaterialsReferences Important Notice

TPS40051 specifications

Texas Instruments TPS40051 is a highly integrated, synchronous step-down (buck) switching regulator designed to deliver power efficiently and effectively to various applications. This device is particularly well-suited for powering FPGAs, DSPs, microcontrollers, and other digital devices that require a stable voltage supply with high efficiency.

One of the main features of the TPS40051 is its ability to operate from a wide input voltage range of 4.5V to 17V. This flexibility makes it suitable for a variety of power sources, including battery-operated systems and traditional AC/DC power supplies. The output voltage can be adjusted from 0.8V to 85% of the input voltage, making it adaptable to different load requirements and application scenarios.

The TPS40051 employs a constant frequency, voltage mode control scheme, which results in improved transient response and stability. The device operates with a fixed switching frequency that can be set between 100kHz and 1MHz, allowing designers to optimize their designs for efficiency or minimize electromagnetic interference (EMI). The low RDS(on) of the integrated MOSFETs reduces conduction losses, contributing to the overall high efficiency of the solution, often exceeding 90%.

In terms of protection features, the TPS40051 includes overcurrent protection, thermal shutdown, and under-voltage lockout, which enhance the reliability of the system. These features allow the device to maintain safe operating conditions in various scenarios, protecting both the regulator and the load.

Another significant characteristic of the TPS40051 is its ability to operate in a Power Good mode. This feature provides feedback to the system regarding the status of the output voltage, allowing for better system monitoring and control. Additionally, it has an adjustable soft-start feature, which helps prevent inrush current during power-up, further protecting sensitive loads.

The TPS40051’s compact package options and its integration of features make it a flexible choice for designers looking to implement efficient power management solutions. Whether used in industrial, automotive, or consumer electronics applications, the TPS40051’s robust performance and adaptability make it an excellent choice for modern power supply designs.
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