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Texas Instruments TPS22921 - page 1
TPS22921/22/22B Load Switch EVM User's Guide Literature Number: SLVU286 January 2009 ...
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Texas Instruments TPS22921 - page 2
2 SLVU286 – January 2009 Submit Documentation Feedback ...
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Texas Instruments TPS22921 - page 3
Contents 1 TPS22921/22/22B Load Switch Evaluation Module (EVM) ................................................ 5 1.1 Introduction ................................................................................................................... 5 2 Schematics and Bill of Materials .................................................................. ...
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Texas Instruments TPS22921 - page 4
www.ti.com List of Figures 3-1 TPS22921/22/22B EVM Component Placement ........................................................................ 9 3-2 TPS22921/22/22B EVM Top-Side Layout .............................................................................. 10 3-3 TPS22921/22/22B EVM Bottom-Side Layout ....................................... ...
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Texas Instruments TPS22921 - page 5
1.1 Introduction Chapter 1 SLVU286 – January 2009 TPS22921/22/22B Load Switch Evaluation Module (EVM) This user's guide describes the TPS22921/22/22B evaluation module (EVM). This guide contains the EVM schematics, bill of materials, assembly drawings, and top and bottom board layouts. The TPS22921/22/22B EVM is an evaluation module for the ...
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Texas Instruments TPS22921 - page 6
TPS22921/22/22B Load Switch Evaluation Module (EVM) 6 SLVU286 – January 2009 Submit Documentation Feedback ...
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Texas Instruments TPS22921 - page 7
2.1 EVM Options 2.2 Schematic A2 B2 C2 A1 B1 C1 U1 TPS22921/22/22B R1 33 R2 330 R3 R OUT1 C OUT1 C IN1 C IN2 C OUT2 R OUT2 R4 C5 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 J6 OUT RES J5 OUT CAP J4 IN CAP C6 1 F µ 1 F µ 10 F µ 0.1 F µ C 7 C8 C1 C2 C3 C4 1 2 J1 1 2 1 2 3 J2 V ON V + V – V + V ...
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Texas Instruments TPS22921 - page 8
2.3 Bill of Materials Bill of Materials www.ti.com Table 2.4. Bill of Materials QTY REFDES VALUE DESCRIPTION SIZE PART NUMBER MFR -01 -02 -03 1 1 1 – – Two-layer, 2420 × 2320 mil, PCB 2420 × 2320 mil HPA393 Any GRM216R61E1 2 2 2 C1, C6 1 µ F Capacitor, ceramic, 25 V, X5R 805 STD 05KA12D GRM21BR61C1 1 1 1 C2 10 µ F Capacitor, ceramic, 16 V, ...
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Texas Instruments TPS22921 - page 9
3.1 TPS22921/22/22B EVM Board Chapter 3 SLVU286 – January 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 – January 2009 Board Layout 9 Submit Documentation Feedback ...
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Texas Instruments TPS22921 - 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 ...
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Texas Instruments TPS22921 - page 11
3.2 Layout Considerations www.ti.com Layout Considerations The V IN and V OUT pins 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 C IN and C OUT bypass capacitors close to the V IN and V OUT pins of U1. SLVU286 – January 2009 Board Layout 11 Sub ...
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Texas Instruments TPS22921 - page 12
Board Layout 12 SLVU286 – January 2009 Submit Documentation Feedback ...
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Texas Instruments TPS22921 - page 13
4.1 Recommended Test Equipment 4.2 Calculating Voltage Drop and Load Current Oscilloscope V oltage probe 3.6 V , 2 A Max 7” twisted pair , #20 A WG + IN – + OUT – EVM V oltage probe Chapter 4 SLVU286 – January 2009 EVM Setup The following test equipment is recommended: • Two-channel storage oscilloscope • Current probe • Voltage probe ...
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Texas Instruments TPS22921 - page 14
EVM Setup 14 SLVU286 – January 2009 Submit Documentation Feedback ...
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Texas Instruments TPS22921 - page 15
Chapter 5 SLVU286 – January 2009 Related Documentation from Texas Instruments • TPS22921, TPS22922, TPS22922B, Low-Input Voltage, Ultra-Low r ON Load Switches data sheet (SLVS749) SLVU286 – January 2009 Related Documentation from Texas Instruments 15 Submit Documentation Feedback ...
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Texas Instruments TPS22921 - 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 th ...
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Texas Instruments TPS22921 - page 17
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders ...
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