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UG-057

ADP1872-EVALZ/ADP1873-EVALZ User Guide

Rev. A | Page 18 of 20

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Summary of Contents for ADP1872-EVALZ

Page 1: ...is capable of pulse skipping to maintain output regulation while achieving improved system efficiency at light loads see the ADP1872 ADP1873 data sheet for more information Both devices are available...

Page 2: ...the Evaluation Board 5 Typical Performance Characteristics 6 Typical Application Circuits 10 Dual Input 300 kHz High Current Application Circuit 10 Evaluation Board Schematics and Layout 11 1 8 V Out...

Page 3: ...on is chosen ensure that Header JP2 is open no jumper and connect J1 to VDD Optionally you can also add a voltmeter across J1 and TP_PGND to monitor the low input voltage If the power input voltage is...

Page 4: ...873 on the evaluation board When closed the switch shorts this pin to ground disabling the ADP1872 ADP1873 When the switch is subsequently opened released the error amplifier brings the voltage on thi...

Page 5: ...justments 2 Record the resultant changes on the dc level of the output voltage VOUT Observing Transient Response To observe the transient response 1 Power up the system see the Powering Up and Powerin...

Page 6: ...5V VIN 16 5V VDD 3 6V VIN 13V VDD 3 6V VIN 16 5V VDD 5 5V VIN 13V PSM VDD 5 5V VIN 13V VDD 5 5V VIN 5V Figure 4 Efficiency 1 MHz VOUT 1 8 V 1 821 1 816 1 811 1 806 1 801 1 796 1 791 5 50 6 95 8 40 9...

Page 7: ...ation at Heavy Load 18 A See Figure 28 for Application Circuit CH1 10A CH2 200mV B W CH3 20V CH4 5V M2ms A CH1 3 40A T 75 6 1 2 3 4 OUTPUT VOLTAGE 20A STEP SW NODE LOW SIDE 08548 046 Figure 12 Load Tr...

Page 8: ...0 s A CH1 5 60A T 23 8 1 2 3 4 OUTPUT VOLTAGE 20A NEGATIVE STEP SW NODE LOW SIDE 08548 051 Figure17 Negative StepDuringHeavy LoadTransientBehavior Forced PWM at Light Load 20 A See Figure 28 for Appli...

Page 9: ...etect Waveform 2 CH2 5V CH3 5V MATH 2V 40ns CH4 2V M40ns A CH2 4 20V T 29 0 3 M 4 HIGH SIDE HS MINUS SW SW NODE LOW SIDE TA 25 C 08548 058 Figure 24 Output Drivers and SW Node Waveforms 2 CH2 5V CH3 5...

Page 10: ...C11 571pF C10 57pF R3 47k C1 1 F C2 0 1 F LOW VOLTAGE INPUT VDD 5 0V JP2 08548 088 JP3 Figure 27 Application Circuit for 12 V Input 1 8 V Output 15 A 300 kHz Q2 Q4 No Connect MURATA HIGH VOLTAGE INPU...

Page 11: ...Q3 Q4 Q1 Q2 HIGH VOLTAGE INPUT VIN 13V C12 100nF VOUT 1 8V 14A C3 22 F C14 N A C15 N A C16 N A C17 N A C18 N A C19 N A C4 22 F C5 22 F C6 22 F C7 22 F VIN1 SMB TP_VOUT1 BANANA PLUG VOUT2 SMB VREG1 SM...

Page 12: ...UG 057 ADP1872 EVALZ ADP1873 EVALZ User Guide Rev A Page 12 of 20 LAYER 1 08548 082 Figure 30 Layer 1...

Page 13: ...ADP1872 EVALZ ADP1873 EVALZ User Guide UG 057 Rev A Page 13 of 20 LAYER 2 08548 083 Figure 31 Layer 2...

Page 14: ...UG 057 ADP1872 EVALZ ADP1873 EVALZ User Guide Rev A Page 14 of 20 LAYER 3 08548 084 Figure 32 Layer 3...

Page 15: ...ADP1872 EVALZ ADP1873 EVALZ User Guide UG 057 Rev A Page 15 of 20 LAYER 4 08548 085 Figure 33 Layer 4...

Page 16: ...N A N A COUT C18 N A N A COUT C19 N A N A COUT C20 270 F Panasonic SP series 4V 7 m 3 7 A EEFUE0G271LR 4 3 mm 7 3 mm 4 2 mm COUT C21 270 F Panasonic SP series 4V 7 m 3 7 A EEFUE0G271LR 4 3 mm 7 3 mm...

Page 17: ...ADP1872 EVALZ ADP1873 EVALZ User Guide UG 057 Rev A Page 17 of 20 NOTES...

Page 18: ...UG 057 ADP1872 EVALZ ADP1873 EVALZ User Guide Rev A Page 18 of 20 NOTES...

Page 19: ...ADP1872 EVALZ ADP1873 EVALZ User Guide UG 057 Rev A Page 19 of 20 NOTES...

Page 20: ...any other party for any reason Upon discontinuation of use of the Evaluation Board or termination of this Agreement Customer agrees to promptly return the Evaluation Board to ADI ADDITIONAL RESTRICTI...

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