AMC34063A

Copyright

© 2006 ADDtek Corp.

6

DD014_E -- JUNE 2006

Figure 3 – Voltage Inverting Converters

Note: For step-up, step-down or voltage inverting applications requiring peak current greater than 1.5A, external boost current circuitry by NPN or

PNP transistors can be used.

1.25V

Reference

C

T

1500pF

-12V/100mA

V

OUT

1000uF

4

3

L

1N5819

88uH

2

1

Q2

Q1

V

IN

3.6K

5

6

1.2K

4.5V to 6.0V

100uF

Ipk

Oscillator

R

7

Q

S

8

0.24

Rsc

8.2K

953

R1

R2

Co