Texas Instruments TPS22921 User Manual Download Page 16

EVALUATION BOARD/KIT IMPORTANT NOTICE

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:

This evaluation board/kit is intended for use for

ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES

ONLY

and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have

electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental
measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does
not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.

Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER
AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user

is not exclusive.

TI assumes

no liability for applications assistance, customer product design, software performance, or infringement of patents or

services described herein.

Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This
notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or
safety programs, please contact the TI application engineer or visit

www.ti.com/esh

.

No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used.

FCC Warning

This evaluation board/kit is intended for use for

ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES

ONLY

and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio

frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are
designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may
be required to correct this interference.

EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of 1.0 V to 3.6 V and the output voltage range of 1.0 V to 3.6 V.

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 85

°

C. The EVM is designed to operate

properly with certain components above 85

°

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 © 2009, Texas Instruments Incorporated

Summary of Contents for TPS22921

Page 1: ...TPS22921 22 22B Load Switch EVM User s Guide Literature Number SLVU286 January 2009...

Page 2: ...2 SLVU286 January 2009 Submit Documentation Feedback...

Page 3: ...hematic 7 2 3 Bill of Materials 8 3 Board Layout 9 3 1 TPS22921 22 22B EVM Board 9 3 2 Layout Considerations 11 4 EVM Setup 13 4 1 Recommended Test Equipment 13 4 2 Calculating Voltage Drop and Load C...

Page 4: ...21 22 22B EVM Top Side Layout 10 3 3 TPS22921 22 22B EVM Bottom Side Layout 10 4 1 EVM Setup For Calculating Voltage Drop and Load Current 13 List of Tables 2 1 TPS22921 22 22B EVM Options 7 2 4 Bill...

Page 5: ...ides a continuous output current of up to 110 mA Additional open resistor and capacitor footprints allow for the use of customer selected input and output load values The TPS22921 22 22B EVM accepts a...

Page 6: ...TPS22921 22 22B Load Switch Evaluation Module EVM 6 SLVU286 January 2009 Submit Documentation Feedback...

Page 7: ...C1 C2 C3 C4 1 2 J1 1 2 1 2 3 J2 VON V V V V R1 10 k J3 VOUT GND V V OUT OUT ON V V IN IN VIN Chapter 2 SLVU286 January 2009 Schematics and Bill of Materials Table 2 1 TPS22921 22 22B EVM Options QUIC...

Page 8: ...nal block 6A 125 V 3 5 mm OnShore 2 2 J1 J3 7 6 5 mm ED555 2DS pitch Technology ERJ 1 1 1 R1 10 k Resistor chip 1 8 W 5 805 STD 6GEYJ103V ERJ 1 1 1 R2 33 Resistor chip 1 8 W 5 805 STD 6GEYJ330V ERJ 1...

Page 9: ...ry 2009 Board Layout This section contains three views of the TPS22921 22 22B EVM evaluation board as well as some layout considerations Figure 3 1 TPS22921 22 22B EVM Component Placement SLVU286 Janu...

Page 10: ...TPS22921 22 22B EVM Board www ti com Figure 3 2 TPS22921 22 22B EVM Top Side Layout Figure 3 3 TPS22921 22 22B EVM Bottom Side Layout Board Layout 10 SLVU286 January 2009 Submit Documentation Feedback...

Page 11: ...of U1 can carry significant current so traces to these pins should be of suitable length and width to minimize voltage drop to the load Locate the CIN and COUT bypass capacitors close to the VIN and V...

Page 12: ...Board Layout 12 SLVU286 January 2009 Submit Documentation Feedback...

Page 13: ...eter The user should read the applicable data sheet before using the EVM Figure 4 1 shows the EVM test setup for measuring input and output voltage The load switch is enabled into a passive on board l...

Page 14: ...EVM Setup 14 SLVU286 January 2009 Submit Documentation Feedback...

Page 15: ...ated Documentation from Texas Instruments TPS22921 TPS22922 TPS22922B Low Input Voltage Ultra Low rON Load Switches data sheet SLVS749 SLVU286 January 2009 Related Documentation from Texas Instruments...

Page 16: ...ct This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer...

Page 17: ...ce TI is not responsible or liable for any such statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product would reasonabl...

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