background image

9

AN1288

.1

October

 30, 200

8

Application Note 1288

ISL8105BEVAL2Z Schematic

LX

VBIAS

FB

COMP/EN

VIN

TGATE

VOUT

BGATE

BOOT

Title

Size

Rev

Date:

Sheet

of

A

ISL8105BEVAL2Z

1

1

Friday, July 11, 2008

1001 Murphy Ranch Rd.
Milpitas, CA, 95035

Intersil Corporation

Title

Size

Rev

Date:

Sheet

of

A

ISL8105BEVAL2Z

1

1

Friday, July 11, 2008

1001 Murphy Ranch Rd.
Milpitas, CA, 95035

Intersil Corporation

Title

Size

Rev

Date:

Sheet

of

A

ISL8105BEVAL2Z

1

1

Friday, July 11, 2008

1001 Murphy Ranch Rd.
Milpitas, CA, 95035

Intersil Corporation

C7
DNP

C7
DNP

C22
DNP

C22
DNP

C10

1uF

C10

1uF

TP2

TP2

J4

VOUT

J4

VOUT

R2

12k

R2

12k

R4
5.9k

R4
5.9k

J6

GND
J6

GND

R1
11.8k

R1
11.8k

+

C13

330uF

+

C13

330uF

+

C14

DNP

+

C14

DNP

+

C19
470uF

+

C19
470uF

R5

1.74k

R5

1.74k

Q1

Q1

4

1

2

3

5

R8

DNP

R8

DNP

TP9

TP9

TP8

TP8

Q6

DNP

Q6

DNP

TP10

TP10

Q3

Q3

4

1

2

3

5

+

C20
470uF

+

C20
470uF

SW1

SW1

1

2

4

3

Q4

DNP

Q4

DNP

L1
1uH

L1
1uH

2

1

C1
10nF

C1
10nF

R7
DNP

R7
DNP

C23
DNP

C23
DNP

+

C16

DNP

+

C16

DNP

U1

ISL8105B DFN

U1

ISL8105B DFN

TGATE

2

BGATE/BSOC

5

VBIAS

6

FB

8

COMP/EN

9

GND

4

BOOT

1

LX

10

NC1

3

NC2

7

EP

11

R3
301

R3
301

J2

VBIAS

J2

VBIAS

TP7

TP7

C4
1.0uF

C4
1.0uF

Q2

DNP

Q2

DNP

4

1

2

3

5

J3

GND

J3

GND

Probe Socket

TPVO1

Probe Socket

TPVO1

1

4

3

2

C8
680pF

C8
680pF

C5

0.1uF

C5

0.1uF

+

C18
470uF

+

C18
470uF

C26

DNP

C26

DNP

R6
4.7

R6
4.7

+

C21
470uF

+

C21
470uF

C24
DNP

C24
DNP

Q5
DNP

Q5
DNP

J1

VIN

J1

VIN

C2
390pF

C2
390pF

J5

GND

J5

GND

+

C12

330uF

+

C12

330uF

TP4

TP4

+

C15

DNP

+

C15

DNP

J7

J7

1

2

3

C28

0.1uF

C28

0.1uF

+

C11

330uF

+

C11

330uF

+

C17

DNP

+

C17

DNP

C9

1uF

C9

1uF

C6

DNP

C6

DNP

TP3

TP3

C3

3.3nF

C3

3.3nF

C25
DNP

C25
DNP

TP6

TP6

C27

0.1uF

C27

0.1uF

Summary of Contents for ISL8105BEVAL1Z

Page 1: ...ents ESR and capacitor charge are major contributions to the output voltage ripple Assuming that the total output capacitance is sufficient then the output voltage ripple is dominated by the ESR which...

Page 2: ...n loss in the high side MOSFET is calculated using Equation 11 The switching loss in the high side MOSFET can be approximated using Equation 12 where ttr is the combined ON and OFF MOSFET transition t...

Page 3: ...rks for Single Phase Voltage Mode Buck Regulators Evaluation Board Performance Figure 2 shows a photograph of the ISL8105BEVAL1Z Power and Load Connections Terminals J1 and J2 are connected to the inp...

Page 4: ...the ISL8105BEVAL1Z ISL8105BEVAL2Z in relation to the start up of the 12V input supply and the bias supply Soft Start with Pre Biased Output If the output is pre biased to a voltage less than the expec...

Page 5: ...FN6306 5V or 12V Single Phase Synchronous Buck Converter PWM Controller with Integrated MOSFET Gate Drivers Intersil Corporation 2 Tech Brief TB417 Designing Stable Compensation Networks for Single Ph...

Page 6: ...7 DNP C17 DNP C11 330uF C11 330uF C8 680pF C8 680pF J2 VBIAS J2 VBIAS Q6 DNP Q6 DNP C18 470uF C18 470uF U1 ISL8105B U1 ISL8105B TGATE 2 BGATE BSOC 4 VBIAS 5 FB 6 COMP EN 7 GND 3 BOOT 1 LX 8 C7 DNP C7...

Page 7: ...num Capacitor 330 F 35V RAD 10x20 Sanyo 14 C18 C19 C20 C21 4 2R5TPF470ML Organic Alumium Capacitor 470 F 2 5V 20 ROHS Case D3L Sanyo 15 C6 C7 C14 C15 C16 C17 C22 C23 C24 C25 C26 DNP RESISTORS 16 R1 1...

Page 8: ...FIGURE 12 ISL8105BEVAL1Z TOP LAYER SILKSCREEN FIGURE 13 ISL8105BEVAL1Z TOP LAYER COMPONENT SIDE FIGURE 14 ISL8105BEVAL1Z LAYER 2 FIGURE 15 ISL8105BEVAL1Z LAYER 3 FIGURE 16 ISL8105BEVAL1Z BOTTOM LAYER...

Page 9: ...19 470uF R5 1 74k R5 1 74k Q1 Q1 4 1 2 3 5 R8 DNP R8 DNP TP9 TP9 TP8 TP8 Q6 DNP Q6 DNP TP10 TP10 Q3 Q3 4 1 2 3 5 C20 470uF C20 470uF SW1 SW1 1 2 4 3 Q4 DNP Q4 DNP L1 1uH L1 1uH 2 1 C1 10nF C1 10nF R7...

Page 10: ...2 C13 3 35ME330AX Aluminum Capacitor 330 F 35V RAD 10x20 Sanyo 14 C18 C19 C20 C21 4 2R5TPF470ML Organic Alumium Capacitor 470 F 2 5V 20 ROHS Case D3L Sanyo 15 C6 C7 C14 C15 C16 C17 C22 C23 C24 C25 C26...

Page 11: ...ore proceeding For information regarding Intersil Corporation and its products see www intersil com AN1288 1 October 30 2008 Application Note 1288 ISL8105BEVAL2Z Printed Circuit Board Layers FIGURE 18...

Page 12: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Intersil ISL8105BEVAL1Z...

Reviews: