Advanced Monolithic Systems, Inc.

6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS34063

TYPICAL APPLICATIONS (Continued)

Step-Up Converter

Test

Conditions

Results

Line Regulation

12 mV

Load Regulation

5.0 mV

Output Ripple

Short Circuit Current

Ω

2.3A

Efficiency

84.7%

a. External NPN Switch

b. External NPN Saturated Switch

8

7

6

V

OUT

1

2

R

SC

V

IN

18

0

8

7

6

V

OUT

1

2

R

SC

V

IN

180

R

0 for

constant V

IN

1.25V

REF

REG

8

7

6

5

+

-

+

C

O

V

OUT

28V/175mA

150

µF

1500

pF

C

T

100

µF

+

4

1

2

3

COMP.

I

PK

C

T

OSC

R

S

Q

Q

2

Q

1

1N5819

R

2

R

1

2.2 k

47 k

R

SC

0.22

V

IN

12V

L

170

µH

180