MIC4685 参数 Datasheet PDF下载

MIC4685

Micrel

Recommended Components for a Given Output Voltage (Bootstrap Configuration)

V

OUT

I

OUT

*

5.0V

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

D2

L1

C4

3A, 30V 1A, 20V

39µH

330µF, 6.3V

Schottky Schottky Sumida

Vishay-Dale

B330A

MBRX120 CDRH127R-390MC 594D337X06R3D2T

3A, 30V 1A, 20V

39µH

330µF, 6.3V

Schottky Schottky Sumida

Vishay-Dale

B330A

MBRX120 CDRH127R-390MC 594D337X06R3D2T

3A, 30V 1A, 20V

39µH

330µF, 6.3V

Schottky Schottky Sumida

Vishay-Dale

B330A

MBRX120 CDRH127R-390MC 594D337X06R3D2T

3A, 30V 1A, 20V

39µH

330µF, 6.3V

Schottky Schottky Sumida

Vishay-Dale

B330A

MBRX120 CDRH127R-390MC 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 Ouput Voltages

JP3

J1

V

IN

D2

MBRX120

1A/20V

L1

39µH

6

2

U1

MIC4685BR

IN

SW

BS

J2

V

OUT

C1

47µF

20V

J3

GND

ON

OFF

C2

0.1µF

50V

1

C3

0.33µF

50V

D1

B330A

or

SS33

R1

C4*

optional

C5

330µF

6.3V

C7

0.1µF

50V

J4

GND

5

EN

GND

4, Tab

FB

3

R2

* C4 can be used to provide additional stability

and improved transient response.

Note: optimized for 5V

OUT

Figure 3. Schematic Diagram

MIC4685

12

September 2002