Intersil ISL8018EVAL3Z User Manual Download | Manualshive

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User Guide 053

UG053.1

October 26, 2015

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FIGURE 7. SECOND LAYER ETCH

FIGURE 8. THIRD LAYER ETCH

ISL8018EVAL3Z Board Layout

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Summary of Contents for ISL8018EVAL3Z

Page 1: ...rator Key Features High efficiency synchronous buck regulator with up to 97 efficiency 10 output voltage margining Adjustable current limit Start up with prebiased output Internal soft start 1ms or adjustable Soft stop output discharge during disabled Adjustable frequency from 500kHz to 4MHz default at 1MHz External synchronization up to 4MHz master to slave phase shifting capability References IS...

Page 2: ...an 140ns SYNCOUT is a 250µA current pulse signal output triggered by the rising edge of the clock or the SYNCIN signal whichever is greater in frequency to drive the other ISL8018 and avoid the system s beat frequencies effects To implement time shifting between the master circuit to the slave it is recommended to add a capacitor C13 as shown in Figure 4 of the schematic The time delay from SYNCOU...

Page 3: ...sponse and start up performance With additional capacitance please use external compensation for better loop response design See the datasheet compensation section for more detail Refer to Figures 11 through 16 for examples of 1 2VOUT and 3 3VOUT soft start waveforms load transient and relevant bode plot with external compensation configuration TABLE 2 COMPONENT VALUE SELECTION REFER TO ISL8018EVA...

Page 4: ... 0 B B 6 B B 811 0 B B 6 B B 811 0 B B 6 B B 811 0 B B 6 B B 811 0 B B 6 B B 811 0 B B 6 B B 811 0 B B 767 7B B 811 0 B B60 3B B 811 0 B B60 3B B 811 0 B B605 6B B 9 1 9 1 9 1 9 1 9 1 9 1 9 1 9 1 9 1 9 1 9 1 9 1 9287 9287 9287 9287 9287 96 7 96 7 96 7 3 4 203 5 8 5 6 23 1 23 1 13 5 6 1 1 4 9287 5 8 3 3 5 8 5 5 8 5 3 6 5 6 9 3 1 3 6 3 6 3 6 9 1 9 1 9 1 3 6 1 287 6 1 1 1 6 96 7 6 7 66 203 9 6 1 3 1 ...

Page 5: ...UCTOR SMD 13mm 1 0µH 20 24A ROHS VISHAY 111 0702 001 2 ea J1 J3 CONN GEN BIND POST INSUL RED THMBNUT GND JOHNSON COMPONENTS 111 0703 001 2 ea J2 J4 CONN GEN BIND POST INSUL BLK THMBNUT GND JOHNSON COMPONENTS 131 4353 00 2 ea LX1 VOUT1 CONN SCOPE PROBE TEST PT COMPACT PCB MNT ROHS TEKTRONIX 1514 2 2 ea J5 J6 CONN TURRET TERMINAL POST TH ROHS KEYSTONE 5000 14 ea EN1 EN2 FB2 PG1 PG2 SS2 ISET VSET COM...

Page 6: ...solid ground plane is helpful for better EMI performance It is recommended to add at least 5 vias ground connection within the pad for the best thermal relief CR0603 10W 1003FT 8 ea R2 R8 R10 R11 R12 R16 R23 R26 RES SMD 0603 100k 1 10W 1 TF ROHS VENKEL CR0603 10W 2003FT 2 ea R1 R5 RES SMD 0603 200k 1 10W 1 TF ROHS VENKEL RC0603FR 0747KL 1 ea R3 RES SMD 0603 47k 1 10W 1 TF ROHS YAGEO 0 ea R17 R27 R...

Page 7: ...User Guide 053 UG053 1 October 26 2015 Submit Document Feedback 7 ISL8018EVAL3Z Board Layout FIGURE 5 TOP LAYER COMPONENTS FIGURE 6 TOP LAYER ETCH ISL8018EVAL3Z ...

Page 8: ...User Guide 053 UG053 1 October 26 2015 Submit Document Feedback 8 FIGURE 7 SECOND LAYER ETCH FIGURE 8 THIRD LAYER ETCH ISL8018EVAL3Z Board Layout Continued ...

Page 9: ...User Guide 053 UG053 1 October 26 2015 Submit Document Feedback 9 FIGURE 9 BOTTOM LAYER ETCH FIGURE 10 BOTTOM LAYER COMPONENTS ISL8018EVAL3Z Board Layout Continued ...

Page 10: ... C5 220pF COUT 144µF EFFECTIVE CAPACITANCE C4 33pF L 1µH FIGURE 13 LOAD TRANSIENT 5 5VIN 3 3VOUT R3 25k C5 470pF COUT 100µF EFFECTIVE CAPACITANCE C4 47pF L 2 2µH SLEW RATE 0 1A µs FIGURE 14 LOAD TRANSIENT 5 5VIN 1 2VOUT R3 70k C5 220pF COUT 144µF EFFECTIVE CAPACITANCE C4 33pF L 1µH SLEW RATE 0 1A µs 500µs DIV IOUT 5A DIV VOUT 2V DIV 500µs DIV IOUT 5A DIV VOUT 500mV DIV VOUT RIPPLE 100mV DIV IOUT 5...

Page 11: ...r information regarding Intersil Corporation and its products see www intersil com UG053 1 October 26 2015 Submit Document Feedback FIGURE 15 BODE PLOT 5 5VIN 3 3VOUT WITH FULL LOAD R3 25k C5 470pF COUT 100µF EFFECTIVE CAPACITANCE C4 47pF L 2 2µH FIGURE 16 BODE PLOT 5 5VIN 1 2VOUT WITH FULL LOAD R3 70k C5 220pF COUT 144µF EFFECTIVE CAPACITANCE C4 33pF L 1µH Typical Performance Curves Unless noted ...

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