9

LT5521

5521f

TEST CIRCUITS

Figure 1. Demonstration Board Schematic

EN

EN

GND

L0

LT5521

EXPOSED

PAD (17)

GND GND

GND

GND

GND

C13

Z14

50

Ω

50

Ω

C6

GND

12

16

15

14

13

L1

L2

C11

5521 F01

C4

C3

50

Ω

C12

T2

11

10

9

1

2

3

4

5

R8

R1

Z3

C2

T1

R7

Z7

OPT

Z1

OPT

67

8

C1

RF

GND

GND

DC

0.017"

0.017"

0.062"

REF

R1, R7

Z14

Z3

L1, L2

T1

T2

C1, C13

C3

C12

C2, C4, C6

C11

Z1, Z7

R8

110

Ω, 1%

10pF

0

Ω

2.7nH

M/A-COM ETC1.6-4-2-3

6.8pF

82pF

82pF

1nF

1

µF

0

Ω

10k

110

Ω, 1%

120nH

150pF

10nH

M/A-COM ETC1.6-4-2-3

27pF

3.9pF

1nF

1nF

1

µF

0

Ω

10k

22.6

Ω, 1%

10pF

0

Ω

2.7nH

M/A-COM ETC1.6-4-2-3

6.8pF

82pF

82pF

1nF

1

µF

100nH

10k

Note 1: Tabulated values are used for characterization measurements.

Note 2: Components shown on the schematic are included for consistency with the demo board.

If no value is shown for the component, the site is unpopulated.

Note 3: T1 also M/A-COM ETC1-1-13 and Sprague Goodman GLSW4M202. These alternative transformers

have been measured and have similar performance.

THIS COMPONENT CAN BE REPLACED BY PCB TRACE ON FINAL APPLICATION

BLOCK DIAGRA

12

15

16

13

14

6

5

8

7

11

10

9

1

2

3

4

GND

5521 BD

BIAS

EN

GND

GND

17

EXPOSED

PAD

GND

GND

LO

GND

GND