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Diodes Incorporated AP64500SP-13
- Part No.:
- AP64500SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP64500SP-13.pdf
- Description:
- IC REG BUCK ADJ 5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:30,934
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Product details
Overview
AP64500SP-13 from Diodes Incorporated is a 5A synchronous buck DC-DC converter with 3.8V–40V input range, integrated 45mΩ high-side and 20mΩ low-side MOSFETs, 0.8V ±1% reference, programmable 100kHz–2.2MHz switching frequency, and proprietary EMI-reducing gate driver. It delivers regulated 5V/12V/24V outputs for distributed power bus supplies in network systems and consumer electronics.
For engineers reviewing the AP64500SP-13 datasheet, AP64500SP-13 pinout, AP64500SP-13 application, or AP64500SP-13 equivalent, key selection criteria include its 25μA quiescent current in PFM mode, ±6% frequency spread spectrum for EMI compliance, precision 1.18V EN threshold for UVLO adjustment, and SO-8EP thermal performance (θJA = 45°C/W).
Technical Context
The AP64500SP-13 uses fixed-frequency peak current mode control with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its proprietary multi-level gate driver suppresses SW node ringing while preserving fast rise/fall times, directly reducing high-frequency radiated EMI.
It supports dual frequency programming: resistor-timed (RT/CLK to GND) or external clock synchronization (100kHz–2.2MHz), with automatic fallback to RT mode if CLK stops. The device implements cycle-by-cycle OCP (6.8–9.2A peak), output OVP (10% overregulation), and thermal shutdown at +160°C with +25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 40V DC - supports direct connection to 5V/12V/24V/36V industrial and automotive supply rails without pre-regulation. |
| IOUT Max | 5A continuous - enables single-chip 5V@5A or 3.3V@5A point-of-load conversion for FPGA, SoC, and ASIC core supplies. |
| fSW Range | 100kHz to 2.2MHz - allows trade-off between efficiency (lower fSW) and component size (higher fSW) in compact PCB layouts. |
| IQ (PFM) | 25μA typical - sustains >85% efficiency at 5mA load, critical for always-on subsystems in home audio and white goods. |
| VFB Accuracy | 0.8V ±1% (792–808mV) - ensures ±1% output voltage regulation across temperature and line/load variations. |
| RDS(ON) HS/LG | 45mΩ / 20mΩ - minimizes conduction loss and thermal stress in high-current 5A operation, enabling SO-8EP package use. |
| EMI Features | FSS (±6% jitter) + ringing-free SW node - reduces peak conducted/radiated emissions to meet CISPR 22/32 Class B limits. |
Pinout & Package
AP64500SP-13 is housed in a thermally enhanced SO-8EP (exposed pad) package, with the exposed pad electrically tied to GND and requiring direct connection to PCB ground plane for optimal thermal dissipation (θJC = 5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | High-side gate drive boost supply | Requires 100nF ceramic capacitor to SW to sustain gate drive voltage during high-side conduction; critical for stable 45mΩ MOSFET turn-on. |
| VIN | Main power input | Accepts 3.8V–40V; must be bypassed with ≥10µF low-ESR capacitor to GND to suppress switching noise and support peak current demands. |
| EN | Enable control with UVLO programming | Digital input with 1.18V rising threshold; internal 1.5µA pull-up enables auto-start when floating; supports external resistive UVLO adjustment. |
| RT/CLK | Frequency programming interface | Configures oscillator via RT resistor (100kHz–2.2MHz) or accepts external clock signal; PLL synchronizes internal timing to external source. |
| FB | Output voltage feedback sensing | Connects to resistive divider (e.g., 115kΩ/22.1kΩ for 5V); 0.8V reference enables precise output setting with <±1% tolerance. |
| COMP | Loop compensation node | External RC network (e.g., 15.8kΩ + 2.7nF) sets phase margin and transient response; required for stability across all operating conditions. |
| GND | Power and signal reference ground | Common return path for VIN, SW, BST, FB, COMP, EN, RT/CLK; must be low-impedance and connected to exposed pad. |
| SW | Switching node output | Drives external LC filter (e.g., 3.6µH + 3×22µF); high dv/dt node requiring tight layout to minimize EMI and ringing. |
| EXPOSED PAD | Thermal and electrical ground path | Must be soldered to ≥4-layer PCB ground plane; sole path for die heat removal-failure causes thermal shutdown at +160°C. |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary gate driver | Eliminates SW node ringing without degrading MOSFET switching speed-reduces high-frequency radiated EMI by >10dB compared to standard drivers. |
| Frequency Spread Spectrum (FSS) | ±6% switching frequency jitter spreads energy across 120kHz bandwidth-lowers peak EMI amplitude to pass FCC Part 15 Class B without shielding. |
| Low-dropout (LDO) mode | Enables regulation down to VOUT = VIN − 0.3V during light loads-maintains output stability during deep partial-load conditions. |
| Precision enable threshold | 1.18V ±70mV rising threshold allows accurate UVLO programming using external resistor divider-enables custom input brown-out behavior. |
| Integrated protection suite | Includes cycle-by-cycle OCP (9.2A max), output OVP (10% trip), thermal shutdown (+160°C), and undervoltage lockout-eliminates need for external fault management circuitry. |
Applications
| 5V Distributed Power Bus | Network System Power Supply |
|---|---|
|
Use Scenario: Providing clean, regulated 5V rail to multiple Ethernet PHYs, switches, and PoE controllers on a 24V-powered networking board. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 5A continuous current with low ripple and fast transient response to handle burst traffic loads. Use Value: Integrated 45mΩ/20mΩ MOSFETs and FSS reduce board area and EMI filtering components, meeting EN 55032 Class A without metal shielding. |
Use Scenario: Generating 12V intermediate bus from 48V telecom input for downstream DC-DC converters in enterprise routers and firewalls. IC Role / Device Role / Timing Role: High-input-voltage buck stage operating at 500kHz with external clock sync to avoid beat frequencies with system clocks. Use Value: 40V absolute max rating and 3.8V start-up enable direct 48V-to-12V conversion with margin; 25μA IQ extends standby time in energy-conscious designs. |
| Home Audio Amplifier PSU | White Goods Control Board |
|
Use Scenario: Powering digital signal processors and DACs in smart speakers and soundbars requiring ultra-low-noise 3.3V supply from 12V rail. IC Role / Device Role / Timing Role: Secondary buck converter in PFM mode at light load, minimizing idle power consumption while maintaining tight output regulation. Use Value: 85% efficiency at 5mA and <10mVpp output ripple (Figure 14–15) ensure clean analog audio performance without audible switching artifacts. |
Use Scenario: Supplying 5V logic power to MCU, display, and sensor interfaces in washing machines and refrigerators with wide input variation (battery + rectified AC). IC Role / Device Role / Timing Role: Robust primary regulator handling 3.8V–40V input transients, including cold-crank dips and load-dump spikes in appliance power domains. Use Value: Built-in UVLO hysteresis (400mV), thermal shutdown, and OVP protect against real-world appliance faults-reducing field failure rate without external supervision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4420AGL-A-Z | 40V max VIN, 2A output, no FSS, 30μA IQ, QFN-10 package | Limited to lower current; lacks EMI features critical for Class B compliance | Select only for cost-sensitive, low-power (<2A), non-EMI-constrained designs where SO-8EP footprint is not required. |
| TPS54560BQPWPRQ1 | 60V max VIN, 5A, no integrated low-side MOSFET, requires external FET, larger solution size | Higher voltage capability but adds complexity and BOM count; no FSS or ringing suppression | Choose only when input exceeds 40V or when discrete FET selection is needed for thermal partitioning in high-ambient environments. |
Compared with MPQ4420AGL-A-Z and TPS54560BQPWPRQ1, AP64500SP-13 uniquely integrates both MOSFETs, FSS, and ringing-free switching in an SO-8EP package-delivering best-in-class EMI performance and smallest PCB footprint for 5A, 40V-rated applications.
Availability
AP64500SP-13 is available at Aetrix Electronics and suitable for 5V distributed power bus supplies, network system power supplies, and white goods control boards requiring stable component supply, long-term lifecycle assurance, and full RoHS/Green compliance.
Supply support for AP64500SP-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The AP64500 belongs to Diodes' high-efficiency, EMI-optimized buck converter product line-designed specifically for industrial, consumer, and networking equipment needing compact, robust, and certification-ready DC-DC solutions.
FAQ
What is the minimum input voltage required for AP64500SP-13 startup?
The AP64500SP-13 has a guaranteed undervoltage lockout (UVLO) rising threshold of 3.5V and a hysteresis of 400mV, meaning it starts switching once VIN reaches ≥3.5V and remains active down to ≥3.1V. Startup occurs automatically when EN is floating or tied to VIN due to the internal 1.5µA pull-up current source that drives EN above its 1.18V threshold as VIN rises.
Can AP64500SP-13 synchronize to an external clock, and what frequency range is supported?
Yes, AP64500SP-13 supports external clock synchronization via the RT/CLK pin across 100kHz–2.2MHz. When an external clock signal is applied, the internal PLL locks to it; if the clock stops, the device automatically reverts to resistor-programmed frequency mode. The input clock must be CMOS-compatible with rail-to-rail swing and ≤10ns rise/fall times for reliable locking.
How does the AP64500SP-13 achieve EMI reduction without sacrificing efficiency?
It combines two hardware-level techniques: a proprietary multi-level gate driver that damps SW node ringing while preserving fast MOSFET switching edges, and Frequency Spread Spectrum (FSS) with ±6% jitter that disperses spectral energy. These features reduce peak radiated emissions by >10dB without increasing conduction or switching losses-verified in typical application circuits per Figure 4–5 and EMI test reports.
Is the exposed thermal pad of AP64500SP-13 electrically connected, and how must it be handled on the PCB?
Yes, the exposed pad is internally connected to GND and must be soldered to a dedicated PCB ground plane with ≥4 thermal vias (0.3mm diameter) connecting to inner ground layers. Per Diodes' layout guidelines, the pad area must match the SO-8EP footprint (3.0mm × 2.5mm), and insufficient grounding causes junction temperature to exceed +160°C, triggering thermal shutdown and reducing reliability.
AP64500SP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.8V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 5A
- Frequency - Switching:
- 100kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP64500SP-13 FAQ
1.How can I place an order for AP64500SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP64500SP-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AP64500SP-13 reliable?
The price and inventory of AP64500SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP64500SP-13 is usually 5 days.
3.What payment methods are accepted for AP64500SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP64500SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP64500SP-13?
AP64500SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP64500SP-13 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AP64500SP-13?
For technical support, including AP64500SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP64500SP-13 requirements.
6.How does Aetrix verify that AP64500SP-13 is sourced from the original manufacturer or authorized distributors?
All AP64500SP-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP64500SP-13 meets industry standards.
7.What is the process for return or replacement of AP64500SP-13?
All AP64500SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP64500SP-13, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AP64500SP-13 part is unused and in its original packaging.
Return procedure for AP64500SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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