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 www.diodes.com 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 www.diodes.com 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 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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