AP65201WU-EVM Manual Rev1

AP65201WU-EVM
500kHz, 16V, 2A, Current Mode, DCM/CCM
Synchronous DC/DC Buck Converter in TSOT26
Description
The AP65201 is a 500kHz switching
frequency
internal
compensated
synchronous DC/DC buck converter. It has
integrated low RDSON high and low side
MOSFETs.
The AP65201 simplifies board layout and
reduces space requirements with its high
level of integration and minimal need for
external components, making it ideal for
distributed power architectures.
The AP65201 enables continuous load
current of up to 2A with efficiency as high as
97%.
The AP65201 is available in a standard
Green TSOT26 package and is RoHS
compliant.
The AP65201 implements an automatic
custom
light
load
efficiency
improvement algorithm.
The AP65201 features current mode control
operation, which enables fast transient
response times and easy loop stabilization.
•
•
•
•
•
Gaming Consoles
Flat Screen TV Sets and Monitors
Set Top Boxes
Distributed Power Systems
Green Electronics
•
•
•
•
Home Audio
Consumer Electronics
Network Systems
FPGA, DSP and ASIC Supplies
Performance Spec of AP65201WU-EVM (Rev2)
Parameter
Conditions
Input Voltage
Range 4.5V to 16V
Output Current
Output Voltage
Peak-to-peak load step
Transient Response
from 1A to 2A
Switching Frequency
Efficiency
AP65201WU-EVM
Document number: Rev. 1.0
1 of 5
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Performance Value
12V
2A
3.3V
100mVP-P
500kHz
91%
July 2015
© Diodes Incorporated
AP65201WU-EVM
500kHz, 16V, 2A, Current Mode, DCM/CCM
Synchronous DC/DC Buck Converter in TSOT26
Figure 1. Evaluation Board (Rev1)
Figure 2. Load Transient 1 to 2A
Figure 3. Efficiency (VOUT=3.3V)
Figure 4. Efficiency (VOUT=5.0V)
VIN=4.7V
VIN=6.5V
VIN=12V
VIN=12V
VIN=16V
VIN=16V
PCB Layouts
Top Layer
AP65201WU-EVM
Document number: Rev. 1.0
Bottom Layer
2 of 5
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July 2015
© Diodes Incorporated
AP65201WU-EVM
500kHz, 16V, 2A, Current Mode, DCM/CCM
Synchronous DC/DC Buck Converter in TSOT26
Quick Start Guide
The AP65201WU-EVM has a simple layout and allows access to the appropriate signals
through test points. To evaluate the performance of the AP65201, follow the procedure below:
1. Connect a power supply to the input terminals VIN and GND. Set VIN to 12V.
2. Connect the positive terminal of the electronic load to VOUT and negative terminal to GND.
3. EN has a positive voltage through a 100K pull-up to VIN. No supply input is required for EN.
4. The evaluation board should now power up with a 3.3V output voltage.
5. Check for the proper output voltage of 3.3V (±1%) at the output terminals VOUT and GND.
Measurement can also be done with a multimeter with the positive and negative leads
between VOUT and GND.
6. Set the load to 2A through the electronic load. Check for the stable operation of the SW
signal on the oscilloscope. Measure the switching frequency.
Measurement/Performance Guidelines:
1) When measuring the output voltage ripple, maintain the shortest possible ground lengths
on the oscilloscope probe. Long ground leads can erroneously inject high frequency
noise into the measured ripple.
2) For efficiency measurements, connect an ammeter in series with the input supply to
measure the input current. Connect an electronic load to the output for output current.
AP65201WU-EVM
Document number: Rev. 1.0
3 of 5
www.diodes.com
July 2015
© Diodes Incorporated
AP65201WU-EVM
500kHz, 16V, 2A, Current Mode, DCM/CCM
Synchronous DC/DC Buck Converter in TSOT26
EVALUATION BOARD SCHEMATIC
BILL OF MATERIALS
Qty
Size
Vendor
Name
Manufacturer PN
1
1210
AVX
12103D226KAT2A
1
0805
Kemet
C0805C105K4RACTU
1
Samsung
Wurth
Electronics
CL21B104KACNNNC
1
0805
12X12X6
mm
Film Resistor, 1%
Film Resistor, 1%
Film Resistor, 1%
Film Resistor, 1%
1
1
1
1
0805
0805
0805
0805
Panasonic
Panasonic
Panasonic
Panasonic
ERJ-6ENF4022V
ERJ-6ENF1302V
ERJ-6ENF7502V
ERJ-6GEY0R00V
Film Resistor, 1%
Terminal Turret Triple
0.094" L (Test Points)
DC/DC converter
1
0805
Panasonic
Keystone
Electronics
Diodes
ERJ-6ENF1003V
Ref
Value
Description
C1,
C2
22µF
C3
1µF
C4
0.1µF
Ceramic Capacitor,
25V, X5R
Ceramic Capacitor,
16V, X7R, 10%
Ceramic Capacitor,
25V, X7R, 10%
L1
4.7µH
DCR=11mΩ, Is=8.25A
R1
R2
R3
R4
40.2KΩ
13KΩ
75KΩ
0Ω
R7
100KΩ
T1
U1
1598
AP65201WU-EVM
Document number: Rev. 1.0
5
1
TSOT26
4 of 5
www.diodes.com
744771004
1598-1
AP65201WU
July 2015
© Diodes Incorporated
AP65201WU-EVM
500kHz, 16V, 2A, Current Mode, DCM/CCM
Synchronous DC/DC Buck Converter in TSOT26
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Copyright © 2015, Diodes Incorporated
www.diodes.com
AP65201WU-EVM
Document number: Rev. 1.0
5 of 5
www.diodes.com
July 2015
© Diodes Incorporated
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