AP62200WU-EVM

AP62200WU-EVM 18V, 2A, Low Iq, COT Synchronous DC/DC Buck Converter DESCRIPTION The AP62200 is a 2A, synchronous buck converter with a wide input voltage range of 4.2V to 18V. The device fully integrates a 90mΩ high-side power MOSFET and a 65mΩ low-side power MOSFET to provide high-efficiency step-down DC/DC conversion. The AP62200 device is easily used by minimizing the external component count due to its adoption of Constant On-Time (COT) control to achieve fast transient response, easy loop stabilization, and low output voltage ripple. The AP62200 design is optimized for Electromagnetic Interference (EMI) reduction. It has a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which reduces highfrequency radiated EMI noise caused by MOSFET switching. The AP62200 requires a minimal number of external components and are available in a space-saving TSOT26 package. FEATURES        VIN Range: 4.2V -18V Output Voltage range: 0.8V to 7V 2A Continuous Output Current 135µA Low Quiescent Current 740kHz Switching Frequency Fully Integrated High-side/Low-side Power MOSFETs: 90mΩ/65mΩ Cycle-by-Cycle Current Limiting     Internal Soft-Start Limits the inrush current: 2.5mS Available in a TSOT26 package Totally Lead-Free & Fully RoHS Compliant Halogen and Antimony Free. “Green” Device APPLICATIONS      Flat Screen TV Sets and Monitors Set Top Boxes Consumer Electronics Network Systems General Purposes AP62200WU-EVM Document number: Rev. 1 - 0 1 of 9 www.diodes.com July 2019 © Diodes Incorporated AP62200WU-EVM 18V, 2A, Low Iq, COT Synchronous DC/DC Buck Converter TYPICAL APPLICATIONS CIRCUIT BST VIN C3 100nF OUTPUT L1 EN VOUT=5.0V SW AP62200 R1 115kΩ FB C1 10μF R2 22.1kΩ C2 2x22μF GND Figure 1. Typical Application Circuit ABSOLUTE MAXIMUM RATINGS Symbol VIN VSW VBST VFB VEN TST TJ TL ESD Susceptibility HBM CDM Parameter Supply Voltage Switch Node Voltage Bootstrap Voltage Feedback Voltage Enable/UVLO Voltage Storage Temperature Junction Temperature Lead Temperature Rating -0.3 to +20 -1.0 to VIN+0.3 VSW-0.3 to VSW+6.0 -0.3V to +6.0 -0.3V to +6.0 -65 to +150 +125 +260 Unit V V V V V °C °C °C Human Body Mode Device Charged Model 2000 500 V V Rating 4.2 to 18 0.8 to 7 Unit V V RECOMMENDED OPERATING CONDITIONS Symbol VIN VOUT TA TJ AP62200WU-EVM Document number: Rev. 1 - 0 Parameter Supply Voltage Output Voltage Range Operating Ambient Temperature Operating Junction Temperature 2 of 9 www.diodes.com -40 to +85 -40 to +125 °C °C July 2019 © Diodes Incorporated AP62200WU-EVM 18V, 2A, Low Iq, COT Synchronous DC/DC Buck Converter SETTING OUTPUT VOLTAGE: Table 1 shows a list of recommended component selections for common output voltages. VOUT R1 R2 L1 1.0V 5.5KΩ 22.1KΩ 2.2µH 1.2V 11.0KΩ 22.1KΩ 2.2µH 1.5V 19.1KΩ 22.1KΩ 2.2µH 1.8V 27.4KΩ 22.1KΩ 3.3µH 2.5V 47.5KΩ 22.1KΩ 3.3µH 3.3V 69.8KΩ 22.1KΩ 3.3µH 5.0V 115KΩ 22.1KΩ 4.7µH Table 1. Common Output Voltages EVALUATION BOARD Figure 2. AP62200WU-EVM AP62200WU-EVM Document number: Rev. 1 - 0 3 of 9 www.diodes.com July 2019 © Diodes Incorporated AP62200WU-EVM 18V, 2A, Low Iq, COT Synchronous DC/DC Buck Converter QUICK START GUIDE The AP62200WU-EVM has a simple layout and allows access to the appropriate signals through test points. To evaluate the performance of the AP62200WU, 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. For Enable, place a jumper at JH12 to “ON” position to connect EN pin to VIN through 100KΩ resistor to enable IC. Jump to “OFF” position to disable IC. 4. The evaluation board should now power up with a 5.0V output voltage. 5. Check for the proper output voltage of 5.0V (±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. AP62200WU-EVM Document number: Rev. 1 - 0 4 of 9 www.diodes.com July 2019 © Diodes Incorporated AP62200WU-EVM 18V, 2A, Low Iq, COT Synchronous DC/DC Buck Converter EVALUATION BOARD SCHEMATIC Figure 3. AP62200WU-EVM Schematic PCB TOP LAYOUT Figure 4. AP62200WU-EVM – Top Layer AP62200WU-EVM Document number: Rev. 1 - 0 5 of 9 www.diodes.com July 2019 © Diodes Incorporated AP62200WU-EVM 18V, 2A, Low Iq, COT Synchronous DC/DC Buck Converter PCB BOTTOM LAYOUT Figure 5. AP62200WU-EVM – Bottom Layer AP62200WU-EVM Document number: Rev. 1 - 0 6 of 9 www.diodes.com July 2019 © Diodes Incorporated AP62200WU-EVM 18V, 2A, Low Iq, COT Synchronous DC/DC Buck Converter BILL OF MATERIALS for AP62200WU-EVM for VOUT=5V Qty Size Vendor Name Manufacturer PN 1 1210 Murata GRM32DR61E106KA12L 2 1210 AVX 12103D226KAT2A 2 0805 Samsung CL21B104KACNNNC 4.7µH 115KΩ 22.1KΩ 0Ω DCR=19.5mΩ, Ir=6.2A Film Resistor, 1% Film Resistor, 1% Film Resistor, 1% 1 1 1 1 10.2X10.2x 4.5mm 0805 0805 0805 Wurth Electronics Panasonic Panasonic Panasonic 744779747 ERJ-6ENF1153V ERJ-6ENF2212V ERJ-6GEY0R00V 100KΩ Film Resistor, 1% 1 0805 Panasonic ERJ-6ENF1003V 1598 Terminal Turret Triple 0.094" L (Test Points) PCB Header, 40 POS 4 ThroughHole Keystone Circuit 1598-2 1 1X3 3M 2340-611TG DC/DC converter 1 TSOT26 Diodes Inc AP62200WU Ref Value C1 10µF C2, C3 22µF C4, C6 0.1µF Ceramic Capacitor, 25V, X5R Ceramic Capacitor, 25V, X5R Ceramic Capacitor, 25V, X7R, 10% L1 R1 R2 R3 R4 JH8, JH9, JH10, JH11, JH12 U1 AP62200 AP62200WU-EVM Document number: Rev. 1 - 0 Description 7 of 9 www.diodes.com July 2019 © Diodes Incorporated AP62200WU-EVM 18V, 2A, Low Iq, COT Synchronous DC/DC Buck Converter TYPICAL PERFORMANCE CHARACTERISTICS VOUT_AC (20mV/div) IL (1A/div) VSW (10V/div) AP62200WU-EVM Document number: Rev. 1 - 0 8 of 9 www.diodes.com July 2019 © Diodes Incorporated AP62200WU-EVM 18V, 2A, Low Iq, COT Synchronous DC/DC Buck Converter 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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