AP1509 データシートの表示（PDF） - Diodes Incorporated.
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AP1509 Datasheet PDF : 13 Pages
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AP1509
150KHz, 2A PWM BUCK DC/DC CONVERTER
Typical Application Circuit
(1) Fixed Type Circuit
12V
DC Input
CIN
Capacitor
FB
3
1 AP1509- 2
VIN
33
Output
4 5 6 78
SD GND GND GND GND
L1
47uH
Inductor
D1
Schottky Diode
3.3V/2A
Output Load
Co
Capacitor
(2) Adjustable Type Circuit
R2 1K
R1 1K
12V
DC Input
CIN
Capacitor
FB
3
L1
Output
1 AP1509 2
VIN
39uH
Inductor
4 56 78
SD GND GND GND GND
D1
Schottky
Diode
VOUT = VFB × (1 + R1 )
R2
VFB = 1.23V
R2 = 1K ~ 3K
(3) Delay Start Circuit
R2 1K
R1 1K
12V
DC Input
CIN
Capacitor
FB
3
VIN 1
AP1509
Output
2
CDELAY 4
0.1uF
56
78
SD GND GND GND GND
RDELAY
10K
L1
39uH
Inductor
D1
Schottky
Diode
2.5V/2A
Output Load
Co
Capacitor
2.5V/2A
Output Load
Co
Capacitor
AP1509
Document number: DS31016 Rev. 4 - 2
2 of 13
www.diodes.com
June 2010
© Diodes Incorporated
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