Diodes AP5100 - Manual (Page 2)

AP5100
1.2A STEP-DOWN CONVERTER with 1.4MHz SWITCHING
FREQUENCY
AP5100
Document number: DS32130 Rev. 3 - 2
2 of 12
www.diodes.com
April 2012
© Diodes Incorporated
Typical Application Circuit (cont.)
BST
SW
FB
IN
EN
C2
22µF
6.3V
R3
100kohm
AP5100
R1
49.9kohm
R2
16.2kohm
D1
B230A
GND
V
IN
V
OUT
3.3V
C3
22nF
3.3µH
C1
10µF
25V
ON OFF
C6
100pF
5
4
1
6
3
L1
Figure 3. 1.4MHz, 3.3V Output at 1A Step-Down Converter
BST
SW
FB
IN
EN
C2
10µF
16V
R3
100Kohm
AP5100
R2
40 ohm
1%
1N5819HW-7
GND
V
IN
C3
10nF
L1
10µH C1
10µF
25V
ON OFF
5
4
1
6
3
6V -12V
- Vout
- Vout
- Vout - Vout
LED1
LED 2
LED 3
R4
200Kohm
1%
D1
Figure 4. White LED Driver Application