MIC4685_10 参数 Datasheet PDF下载

Micrel, Inc.

MIC4685

Recommended Components for a Given Output Voltage (Standard Configuration)

V

OUT

5.0V

I

OUT

*

2.0A

R1

3.01k

R2

976Ω

V

IN

8V – 30V

C1

33µF, 35V

Vishay-Dale

595D336X0035R2T

33µF, 35V

Vishay-Dale

595D336X0035R2T

33µF, 35V

Vishay-Dale

595D336X0035R2T

33µF, 35V

Vishay-Dale

595D336X0035R2T

D1

3A, 40V

Schottky

B340A-E3

3A, 40V

Schottky

B340A-E3

3A, 40V

Schottky

B340A-E3

3A, 40V

Schottky

+ Vishay

B340A-E3

L1

39µH

Sumida

CDRH127-390MC

39µH

Sumida

CDRH127-390MC

39µH

Sumida

CDRH127-390MC

39µH

Sumida

CDRH127-390MC

C5

330µF, 6.3V

Vishay-Dale

594D337X06R3D2T

330µF, 6.3V

Vishay-Dale

594D337X06R3D2T

330µF, 6.3V

Vishay-Dale

594D337X06R3D2T

330µF, 6.3V

Vishay-Dale

594D337X06R3D2T

3.3V

2.4A

3.01k

1.78k

8V – 26V

2.5V

2.35A

3.01k

2.94k

7V – 23V

1.8V

2.0A

3.01k

6.49k

6V – 16V

*

Maximum output current at minimum input voltage. See SOA curves for maximum output current vs. Input voltage.

Table 2. Recommended Components for Common Output Voltages

JP3

J1

V

IN

(34V transient)

C2

0.1µF

50V

D2***

B340

L1

39µH

C3

0.33µF

50V

D1

B340A

1

2

J2

V

OUT

2A

U1 MIC4685_R

2 IN

SW 6

BS

5

EN

FB

GND

4, Tab

1

3

C1

33µF

35V

J3

GND

ON

OFF

R1

3.01k

R2

6.49k

3

JP1a

1.8V

4

C4*

optional

R3

2.94k

5

JP1b

2.5V

6

R4

1.78k

7

JP1c

3.3V

8

R5

976W

JP1d

5.0V

C5

330µF

6.3V

C6**

C7

0.1µF

50V

J4

GND

* C4 can be used to provide additional stability

and improved transient response.

Note: optimized for 5V

OUT

** C6 Optional

*** D2 is not used for standard configuration and JP3 is open.

Figure 4. Evaluation Board Schematic Diagram

January 2010

14

M9999-012610