MIC4685_10 参数 Datasheet PDF下载

Micrel, Inc.

MIC4685

Recommended Components for a Given Output Voltage (Bootstrap Configuration)

V

OUT

5.0V

I

OUT

*

2.1A

R1

3.01k

R2

976Ω

V

IN

7.5V – 16V

C1

47µF, 20V

Vishay-Dale

595D476X0020D2T

47µF, 20V

Vishay-Dale

595D476X0020D2T

47µF, 20V

Vishay-Dale

595D476X0020D2T

47µF, 20V

Vishay-Dale

595D476X0020D2T

D1

3A, 30V

Schottky

+ Vishay

B330A

3A, 30V

Schottky

B330A

3A, 30V

Schottky

B330A

3A, 30V

Schottky

+ Vishay

B330A

D2

1A, 20V

Schottky

B120-E3

1A, 20V

Schottky

B120-E3

1A, 20V

Schottky

B120-E3

1A, 20V

Schottky

B120-E3

L1

39µH

Sumida

CDRH127R-390MC

39µH

Sumida

CDRH127R-390MC

39µH

Sumida

CDRH127R-390MC

39µH

Sumida

CDRH127R-390MC

C4

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

2.2A

3.01k

1.78k

6.0V – 16V

2.5V

2.0A

3.01k

2.94k

5.0V – 16V

1.8V

2.0A

3.01k

6.49k

5.0V – 16V

*

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

Table 1. Recommended Components for Common Output Voltages

JP3

J1

V

IN

C2

0.1µF

50V

D2

MBRX120

1A/20V

U1 MIC4685_R

2 IN

SW 6

BS 1

5 EN

FB 3

GND

4, Tab

D1

B330A

or

SS33

R2

L1

39µH

C3

0.33µF

50V

J2

V

OUT

C1

47µF

20V

J3

GND

R1

ON

OFF

C4*

optional

C5

330µF

6.3V

C7

0.1µF

50V

J4

GND

* C4 can be used to provide additional stability

and improved transient response.

Note: optimized for 5V

OUT

Figure 3. Schematic Diagram

January 2010

13

M9999-012610