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DESCRIPTION
The AP62500 is a 5A, synchronous buck converter with
a wide input voltage range of 4.5V to 18V. The device
fully integrates a 47mΩ high-side power MOSFET and a
18mΩ low-side power MOSFET to provide high-
efficiency step-down DC-DC conversion.
The AP62500 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.
FEATURES
VIN: 4.5V to 18V
Output Voltage (VOUT): 0.6V to 7V
5A Continuous Output Current
0.6V ± 1% Reference Voltage
195μA Quiescent Current
Selectable Operation Modes
o
Pulse Frequency Modulation (PFM)
o
Ultrasonic Mode (USM)
o
Pulse Width Modulation (PWM)
Selectable Switching Frequency
o
400kHz
o
800kHz
o
1.2MHz
APPLICATIONS
5V and 12V Input Distributed Power Bus Supplies
Television Sets and Monitors
White Goods and Small Home Appliances
FPGA, DSP, and ASIC Supplies
Home Audio
Network Systems
Gaming Consoles
Consumer Electronics
General Purpose Point of Load
AP62500SJ-EVM
Issue 1
The AP62500 design is optimized for Electromagnetic
Interference (EMI) reduction. The device has
proprietary gate driver scheme to resist switching node
ringing without sacrificing MOSFET turn-on and turn-off
times, which reduces high-frequency-radiated EMI noise
caused by MOSFET switching.
The device is available in a V-QFN2030-12 (Type A)
package.
Programmable Soft-Start Time
Proprietary Gate Driver Design for Best EMI
Reduction
Power-Good Indicator
Precision Enable Threshold to Adjust UVLO
Protection Circuitry
o
Undervoltage Lockout (UVLO)
o
Cycle-by-Cycle Valley Current Limit
o
Thermal Shutdown
1 of 12
www.diodes.com
AP62500SJ
EVM User Guide
© 2024 Copyright Diodes Incorporated. All Rights Reserved.
a
March 2024

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Summary of Contents for Diodes AP62500SJ

  • Page 1 FPGA, DSP, and ASIC Supplies • Home Audio • Network Systems • Gaming Consoles • Consumer Electronics • General Purpose Point of Load 1 of 12 AP62500SJ-EVM March 2024 www.diodes.com © 2024 Copyright Diodes Incorporated. All Rights Reserved. Issue 1...
  • Page 2: Functional Block

    Figure 1. Functional Block Diagram RECOMMENDED OPERATING CONDITIONS Symbol Parameter Unit Supply Voltage 18.0 VOUT Output Voltage Operating Ambient Temperature °C Operating Junction Temperature +125 °C 2 of 12 AP62500SJ-EVM March 2024 www.diodes.com © 2024 Copyright Diodes Incorporated. All Rights Reserved. Issue 1...
  • Page 3: Evaluation Board

    AP62500SJ EVM User Guide EVALUATION BOARD Figure 2. AP62500SJ-EVM 3 of 12 AP62500SJ-EVM March 2024 www.diodes.com © 2024 Copyright Diodes Incorporated. All Rights Reserved. Issue 1...
  • Page 4 EVM User Guide QUICK START GUIDE The AP62500SJ-EVM has a simple layout and allows access to the appropriate signals through test points. The board is targeted to be used in providing a simple and convenient evaluation environment for the AP62500.
  • Page 5: Application Information

    3 x 22 1200 0.68 2.70 31.6 1.30 3 x 22 1200 0.87 45.3 3 x 22 1200 1.00 73.2 3 x 22 1200 1.20 5 of 12 AP62500SJ-EVM March 2024 www.diodes.com © 2024 Copyright Diodes Incorporated. All Rights Reserved. Issue 1...
  • Page 6: Evaluation Board Schematic

    AP62500SJ EVM User Guide EVALUATION BOARD SCHEMATIC Figure 3. AP62500SJ-EVM Schematic PCB TOP LAYOUT Figure 4. AP62500SJ-EVM – Top Layer 6 of 12 AP62500SJ-EVM March 2024 www.diodes.com © 2024 Copyright Diodes Incorporated. All Rights Reserved. Issue 1...
  • Page 7 AP62500SJ EVM User Guide PCB INNER LAYER 2 LAYOUT Figure 5. AP62500SJ-EVM – Inner Layer 2 PCB INNER LAYER 3 LAYOUT Figure 6. AP62500SJ-EVM – Inner Layer 3 7 of 12 AP62500SJ-EVM March 2024 www.diodes.com © 2024 Copyright Diodes Incorporated. All Rights Reserved.
  • Page 8 AP62500SJ EVM User Guide PCB BOTTOM LAYOUT Figure 7. AP62500SJ-EVM – Bottom Layer BILL OF MATERIALS for AP62500SJ-EVM for V =5V @800kHz Value Description Size Vendor Manufacturer PN Layer Ceramic C10, Capacitor, 25V, 22µF 1206 Samsung CL31X226KAHN3NE Ceramic Capacitor, 50V, Wurth 0.1µF...
  • Page 9 Terminal Turret JH7, Keystone 1598 Triple 0.094" L Through-Hole 1598-2 JH8, Electronics (Test Points) Diodes 5A Sync DC/DC Incorporated AP62500 Converter QFN2030-12 (Diodes) AP62500SJ 9 of 12 AP62500SJ-EVM March 2024 www.diodes.com © 2024 Copyright Diodes Incorporated. All Rights Reserved. Issue 1...
  • Page 10: Typical Performance Characteristics

    Figure 8. Efficiency vs. Output Current, VIN = 12V, VOUT = 5V, L = 2.2μH, f = 800kHz Figure 9. Efficiency vs. Output Current, VIN = 12V, VOUT = 3.3V, L = 1.5μH, f = 800kHz Issue x – Month, Year 1 of 12 www.didoes.com © Diodes Incorporated, Year...
  • Page 11 Figure 15. Output Voltage Ripple, IOUT = 5A VIN = 12V, VOUT = 5V PWM f = 800kHz VIN = 12V, VOUT = 5V PWM f = 800kHz Issue x – Month, Year 2 of 12 www.didoes.com © Diodes Incorporated, Year...
  • Page 12 Diodes assumes no liability for any application-related information, support, assistance or feedback that may be provided by Diodes from time to time. Any customer or user of this document or products described herein will assume all risks and liabilities associated with such use, and will hold Diodes and all companies whose products are represented herein or on Diodes’...

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