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Test Setup

5.3 List of Test Points

Table 2. Test Point Functions Found on the TPS51220A EVM-476

TEST POINT NAME DESCRIPTION

TP1 VIN Measurement point for input voltage with respect to TP18

TP2 VOUT1 Measurement point for output 1 voltage with respect to TP7

TP3 VOUT2 Measurement point for output 2 voltage with respect to TP8

TP4 SW1 Output 1 switch node with respect to TP20

TP5 VREG5 5-V/100-mA output, enabled EN is high, use switch S3

TP6 SW2 Output 2 switch node with respect to TP21

TP7 GND1 Ground reference for VOUT1

TP8 GND2 Ground reference for VOUT2

TP9 VREG3 3.3-V/10-mA output should be present when input voltage is applied to EVM.

TP10 EN1 Output 1 enable signal, will be high when output is enabled via switch S1

TP11 EN2 Output 2 enable signal, will be high when output is enabled via switch S2

TP12 PG1 Output 1 power good signal, will be high when output is in regulation

TP13 PG2 Output 2 power good signal, will be high when output is in regulation

TP14 EN 5-V and 2-V reference enable signal, high when EVM is enabled via switch S3

TP15 VREF2 2-V internal reference, enabled when EN is high, use switch S3

TP16 – Not used

TP17 – Not used

TP18 GNDIN Ground reference for VIN

TP19 GNDS General ground

TP20 GND Ground reference for SW1

TP21 GND Ground reference for SW2

TP22 GND General ground

TP23 GND General ground

TP24 SYNC Not used

SLUU381A–September 2009–Revised May 2011 High Performance Dual Output Synchronous Buck EVM

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