AP1501(A)-EVM

AP1501(A)-EV
Application Note
AP1501(A) Application Information and Demo Board User Guide
Contents
1. Description
2. Schematic
3. EVM Board and Efficiency
4. PCB Layout
5. Bill of Materials
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is
assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
1/4
Rev. A
MAY 2010
www.diodes.com
 Diodes Incorporated
AP1501(A)-EV
Application Note
AP1501(A) Application Information and Demo Board User Guide
1. Description
The AP1501/A are a fully integrated step-down DC/DC converter, with the ability to drive
3A/5A load without the need of additional driver components. The AP1501/A operates at a
switching frequency of 150KHZ enabling the use of small size filter components. As a result,
board space is reduced and BOM costs are lowered.
2. EVM Schematic
VIN=12V
VOUT=5V/3A
AP1501
J3
5
Vin
SD
C2
OUTPUT
FB
2
1
2
47uH
D1
B340A
4
R2
3K
R1
option
C5
option
3
C1
C4
1 Open
2
L1
GND
1
C7
C3
0.1u
470uF
ON/OFF
470uF
0.1u
R4
Open
C6
R3
1K
option
VIN=12V
VOUT=5V/5A
AP1501A
J3
5
C2
Vin
SD
L1
OUTPUT
FB
2
1
2
22uH
D1
B540C
4
R2
3K
R1
option
C5
option
3
C1
C4
1 Open
2
GND
1
C7
C3
0.1u
470uF
ON/OFF
470uF
0.1u
R4
Open
C6
option
R3
1K
Figure 1. AP1501(A) schematic
Note :
VOUT = VFB * (1+R2/R3)
VFB=1.23V
R3 = 1K ~ 3K
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is
assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
2/4
Rev. A
MAY 2010
www.diodes.com
 Diodes Incorporated
AP1501(A)-EV
Application Note
AP1501(A) Application Information and Demo Board User Guide
3. EVM board and Efficiency
4. Board Layout
Top Layer
Bottom Layer
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is
assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
3/4
Rev. A
MAY 2010
www.diodes.com
 Diodes Incorporated
AP1501(A)-EV
Application Note
AP1501(A) Application Information and Demo Board User Guide
5. Bill of Materials
For AP1501
Component
Quantity
Location
Specification
Mark
Maker Part No.
Size
C1,C3
2
470uF/25V
(Aluminum Capacitors)
G-LUXON
C2,C7
2
Ceramic capacitor
0.1uF/50V,Y5V
TAIYO YUDEN
UMK107F104ZA-T
C0603
L1
1
47uH/3A
Wurth Electronics
744132
21X9.5
R2
1
3K(1%)
YAGEO
R0805
R3
1
1K(1%)
YAGEO
R0805
R4
1
Short
-
-
R0805
D1
1
Schottky diode 40V 3A*
Diodes
B340A
SMA
U1
1
150KHz, 3A PWM buck
converter*
Diodes
AP1501
TO263-5L
Vin, Vout
4
HEADER_1
-
-
2X2X13
Specification
Mark
Maker Part No.
Size
10X15
For AP1501A
Component
Quantity
Location
C1,C3
2
470uF/25V
(Aluminum Capacitors)
G-LUXON
C2,C7
2
Ceramic capacitor
0.1uF/50V,Y5V
TAIYO YUDEN
UMK107F104ZA-T
C0603
L1
1
22uH/5A
Wurth Electronics
744150
28.5X14.5
R2
1
3K(1%)
YAGEO
R0805
R3
1
1K(1%)
YAGEO
R0805
R4
1
Short
-
-
R0805
D1
1
Schottky diode 40V 5A*
Diodes
B540C
SMC
U1
1
150KHz, 5A PWM buck
converter*
Diodes
AP1501A
TO263-5L
Vin, Vout
4
HEADER_1
-
-
2X2X13
10X15
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is
assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
4/4
Rev. A
MAY 2010
www.diodes.com
 Diodes Incorporated
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