AP1509-12V DIODES [Diodes Incorporated], AP1509-12V Datasheet - Page 2

• Manufacturer Part Number: AP1509-12V
• Description: 150KHz, 2A PWM BUCK DC/DC CONVERTER
• Manufacturer: DIODES [Diodes Incorporated]

Typical Application Circuit
(1) Fixed Type Circuit
(2) Adjustable Type Circuit
(3) Delay Start Circuit
AP1509
Document number: DS31016 Rev. 4 - 2
DC Input
DC Input
Capacitor
Capacitor
DC Input
Capacitor
12V
12V
12V
C
C
C
IN
IN
IN
R2 1K
R2 1K
C
0.1uF
R
DELAY
10K
DELAY
V
V
V
IN
IN
IN
1
1
4
4
1
4
SD
SD
SD
AP1509-
AP1509
5
5
AP1509
5
GND
GND
GND
33
3
6
6
6
3
3
GND
GND
GND
FB
FB
FB
V
7
7
OUT
7
GND
GND
GND
www.diodes.com
2
R2 = 1K ~ 3K
8
V
2
= V
2
8
8
GND
FB
GND
GND
2 of 13
Output
FB
Output
= 1.23V
Output
150KHz, 2A PWM BUCK DC/DC CONVERTER
×
(1 +
Schottky Diode
R1 1K
R1 1K
R2
R1
Schottky
Schottky
Diode
Diode
D1
D1
)
D1
Inductor
Inductor
39uH
39uH
Inductor
47uH
L1
L1
L1
Capacitor
Capacitor
Capacitor
Co
Output Load
Output Load
Co
Co
2.5V/2A
2.5V/2A
Output Load
3.3V/2A
AP1509
© Diodes Incorporated
June 2010