DIODES AP64060WU-EVM Synchronous Buck Converter User Guide

DIODES AP64060WU-EVM Synchronous Buck Converter User Guide

DESCRIPTION
The AP64060 is a 600mA, synchronous buck converter with a wide input voltage range of 4.5V to 40V. The device fully integrates a 600mΩ high-side power MOSFET and a 300mΩ low-side power MOSFET to provide high-efficiency stepdown DC-DC conversion.
The AP64060 device is easily used by minimizing the external component count due to its adoption of peak current mode control.

The AP64060 design 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 device is available in a TSOT26 package

FEATURES

• Wide Input Range: 4.5V to 40V
• 600mA Continuous Output Current
• 0.8V ±1% Reference Voltage
• 90µA Low Quiescent Current (Pulse Frequency Modulation)
• 2.2MHz Switching Frequency
• Supports Pulse Frequency Modulation (PFM)
• Proprietary Gate Driver Design for Best EMI Reduction
• Precision Enable Threshold to adjust UVLO
• Protection Circuitry
  • Undervoltage Lockout (UVLO)
  • Output Overvoltage Protection (OVP)
  • Cycle-by-Cycle Peak Current Limit
• Thermal Shutdown
• Totally Lead-Free & Fully RoHS Compliant
• Halogen and Antimony Free. “Green” Device s

APPLICATIONS

• 5V, 12V, and 24V Distributed Power Bus Supplies
• eMeters
• Automotive Devices
• White Goods and Small Home Appliances
• FPGA, DSP, and ASIC Supplies
• General-purpose Point-of-Load Devices

ABSOLUTE MAXIMUM RATINGS

-0.3 to +45.0 (400ms)
VBST| Bootstrap Pin Voltage| VSW – 0.3 to VSW + 6.0| V
VEN| Enable/UVLO Pin Voltage| -0.3 to +42.0| V
VRT/CLK| RT/CLK Pin Voltage| -0.3 to +6.0| V
VFB| Feedback Voltage| -0.3V to +6.0| V
VCOMP| Compensation Pin Voltage| -0.3 to +6.0| V
**** VSW| Switch Node Voltage| -0.3 to VIN + 0.3 (DC)| V
-2.5 to VIN + 2.0 (20ns)
TJ| Junction Temperature| +160| °C
TL| Lead Temperature| +260| °C

RECOMMENDED OPERATING CONDITIONS

EVALUATION BOARD

QUICK START GUIDE
The AP64060WU-EVM has a simple layout and allows access to the appropriate signals through test points. To evaluate the performance of the AP64060WU, 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, at JH8, place a jumper to “VIN” position to connect EN pin directly to VIN. Jump to “GND” 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 600mA 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

SETTING OUTPUT VOLTAGE:
Table 1 shows a list of recommended component selections for common output voltages.

Table 1. Common Output Voltages

EVALUATION BOARD SCHEMATIC

Figure 2. AP64060WU-EVM Schematic (Commercial) **

**PCB TOP & BOTTOM LAYOUTS

Figure 3. AP64060WU-EVM – Top Layer
**Figure 4. AP64060WU-EVM – Bottom Layer

BILL OF MATERIALS for AP64060WU-EVM (Commercial) for VOUT=5V
**

Ref| Value| Description| Qty| Size| Vendor Name| Manufacturer PN
---|---|---|---|---|---|---
C1| 2.2µF| Ceramic Capacitor, 50V| 1| 1206| Murata| GCM31CR71H225K A55L
C4,C6, C8| 0.1µF| Ceramic Capacitor, 50V| 3| 0603| Murata| GCJ188R71H104K A12D
C2| 10µF| Ceramic Capacitor, 25V| 1| 1206| Murata| GRM31CR71E106K A12L
R1| 115KΩ| RES SMD| 1| 0603| Panasonic| ERJ-3RED1153V
R2| 22.1KΩ| RES SMD| 1| 0603| Panasonic| ERJ-3RBD2212V
L1| 10µH| DCR=322mΩ, Ir=1.2A| 1| 3.0×3.0x2.0mm| Wurth| 78438336100
JH8| | PCB Header, 40 POS| 1| 1X3| 3M| 2340-6111TG
JH4, JH5, JH6, JH7| 1598| Terminal Turret Triple 0.094″ L (Test Points)| 4| Through- Hole| Keystone Electronics| **** 1598-2
U1| AP64060| Sync DC-DC Buck Converter| 1| SO-8EP| DiodesIncorporated (Diodes)| AP64060WU

TYPICAL PERFORMANCE CHARACTERISTICS

IMPORTANT NOTICE

1. DIODES INCORPORATED (Diodes) AND ITS SUBSIDIARIES MAKE NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO ANY INFORMATION CONTAINED IN THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
2. The Information contained herein is for informational purpose only and is provided only to illustrate the operation of Diodes’ products described herein and application examples. Diodes does not assume any liability arising out of the application or use of this document or any product described herein. This document is intended for skilled and technically trained engineering customers and users who design with Diodes’ products. Diodes’ products may be used to facilitate safety-related applications; however, in all instances customers and users are responsible for (a) selecting the appropriate Diodes products for their applications, (b) evaluating the suitability of Diodes’ products for their intended applications, (c) ensuring their applications, which incorporate Diodes’ products, comply the applicable legal and regulatory requirements as well as safety and functional-safety related standards, and (d) ensuring they design with appropriate safeguards (including testing, validation, quality control techniques, redundancy, malfunction prevention, and appropriate treatment for aging degradation) to minimize the risks associated with their applications.
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9. This Notice may be periodically updated with the most recent version available at https://www.diodes.com/about/company/termsand-conditions/important-notice

The Diodes logo is a registered trademark of Diodes Incorporated in the United States and other countries. All other trademarks are the property of their respective owners. © 2024 Diodes Incorporated. All Rights Reserved.

AP64060WU-EVM Rev:1
www.diodes.com
January 2024
Copyright Diodes incorporated. All Rights Reserved.

References

• Diodes Incorporated - Analog, Discrete, Logic, Mixed-Signal
• Diodes Incorporated - Analog, Discrete, Logic, Mixed-Signal
• Important Notice
• diodes.com/about/company/terms-and-conditions/terms-and-conditions-of-sales/

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