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Diodes Incorporated AP64501SP-13
- Part No.:
- AP64501SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP64501SP-13.pdf
- Description:
- IC REG BUCK ADJ 5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:44,818
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Product details
Overview
AP64501SP-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, 570kHz fixed-frequency peak-current-mode control, programmable soft-start (via external capacitor), and 0.8V ±1% reference voltage. It delivers regulated 5V/12V/24V point-of-load power in industrial power tools, home audio systems, and network equipment.
For engineers reviewing the AP64501SP-13 datasheet, AP64501SP-13 pinout, AP64501SP-13 application, or AP64501SP-13 equivalent, key selection considerations include EMI-reduction features (ringing-free gate drive + ±6% FSS), precision enable threshold (1.18V), light-load PFM efficiency (85% at 5mA), thermal shutdown (160°C), and SO-8EP package thermal performance (θJA = 45°C/W).
Technical Context
The AP64501SP-13 employs fixed-frequency peak current mode control with internal 570kHz oscillator and slope compensation to ensure stability at >50% duty cycle. Its proprietary multi-level gate driver eliminates switching-node ringing while preserving fast rise/fall times for minimal EMI without efficiency penalty.
It supports dual operating modes: forced PWM under heavy load and PFM at light load (COMP clamped at 950mA peak inductor current), achieving 25μA quiescent current and 85% efficiency at 5mA. Output regulation uses a 0.8V reference with ±1% tolerance over temperature and line.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 40V DC - supports direct connection to 5V/12V/24V/36V industrial buses without pre-regulation. |
| Output Current | 5A continuous - enables single-chip 5V/3.3V PoL conversion for microcontrollers, FPGAs, and interface ICs. |
| Feedback Reference | 0.8V ±1% - ensures output voltage accuracy of ±1% across -40°C to +85°C ambient. |
| Quiescent Current | 25μA typical (PFM mode) - extends battery life in always-on subsystems like sensor nodes or standby rails. |
| Switching Frequency | 570kHz nominal (±6% FSS) - balances inductor size, EMI spread, and efficiency for compact 4-layer PCB designs. |
| Thermal Shutdown | 160°C junction with 25°C hysteresis - provides robust overtemperature protection while enabling high-power density layout. |
| EMI Reduction | Ringing-free SW node + ±6% frequency spread spectrum - meets CISPR 22 Class B conducted/radiated limits without shielding or ferrites. |
Pinout & Package
AP64501SP-13 is housed in an SO-8EP (exposed pad) package optimized for thermal dissipation (θJC = 5°C/W) and EMI control. The exposed thermal pad must be soldered to a solid GND plane for safe operation at full 5A load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | High-side gate drive bootstrap supply | Requires 100nF ceramic capacitor to SW to sustain gate drive during high-duty-cycle operation. |
| VIN (Pin 2) | Main power input | Accepts 3.8V–40V; requires bulk capacitance ≥10µF near pin to suppress switching transients. |
| EN (Pin 3) | Enable control with UVLO programming | Logic-high threshold = 1.18V; internal 1.5µA pullup enables auto-start when left floating. |
| SS (Pin 4) | Soft-start timing node | 4µA internal current source charges external capacitor (e.g., 10nF → 4ms ramp) to limit inrush current. |
| FB (Pin 5) | Output voltage feedback sensing | Connects to resistive divider; regulates output using 0.8V internal reference with ±1% tolerance. |
| COMP (Pin 6) | Loop compensation node | External RC network sets phase margin and transient response; critical for stability with 3.6µH inductors. |
| GND (Pin 7) | Power ground reference | Primary return path for high-current switching; must be low-impedance and tied to exposed pad. |
| SW (Pin 8) | Power switch node | Drives external LC filter; high di/dt node requiring tight layout and Kelvin connection to minimize EMI. |
| Exposed Pad | Thermal and electrical ground | Must be soldered to ≥2cm² internal/external GND copper area; failure causes thermal shutdown or damage. |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary ringing-free gate driver | Eliminates >100MHz SW node oscillation without slowing edge rates, reducing radiated EMI by >10dB at 30–1000MHz. |
| Frequency Spread Spectrum (FSS) | ±6% jitter spreads switching energy across ~68kHz bandwidth, lowering peak conducted emissions by up to 15dB. |
| Low-dropout (LDO) mode | Enables regulation down to VOUT = VIN − 0.3V during startup or overload, preventing brownout in wide-input applications. |
| Precision enable threshold | 1.18V rising threshold with 400mV hysteresis allows accurate UVLO configuration via external resistor divider on EN pin. |
| Cycle-by-cycle OCP + hiccup mode | Detects >6.8A peak HS current; after 512 consecutive trips, enters 8192-cycle hiccup recovery to limit power dissipation during short-circuit. |
Applications
| Power Tools | Home Audio Systems |
|---|---|
|
Use Scenario: Cordless drill with 18V Li-ion battery powering MCU, motor driver, and display. IC Role / Device Role / Timing Role: Primary 5V/3.3V PoL regulator converting 18V battery to stable logic rail; handles 0–5A dynamic load steps during trigger actuation. Use Value: 85% efficiency at 5mA idle current extends runtime; FSS + ringing-free SW meets IEC 62368-1 EMC requirements without added filters. |
Use Scenario: Multi-channel amplifier with digital signal processor and DAC requiring clean 3.3V and 5V supplies. IC Role / Device Role / Timing Role: Low-noise buck converter supplying DSP core voltage; operates in PFM during audio pause to minimize background noise coupling. Use Value: 25μA IQ prevents audible hiss in analog stages; ±1% FB reference ensures consistent DAC reference accuracy across temperature. |
| Network Routers | White Goods Control Boards |
|
Use Scenario: Gigabit Ethernet router with 12V input powering PHY, switch IC, and Wi-Fi SoC. IC Role / Device Role / Timing Role: Secondary 3.3V regulator for Ethernet PHY; withstands 40V surge transients on 12V bus per IEEE 802.3af. Use Value: 40V absolute max VIN rating and 160°C TSD protect against field-induced overvoltage events; SO-8EP enables compact 2-layer layout. |
Use Scenario: Smart refrigerator control board with 24V supply powering MCU, touch panel, and sensor hub. IC Role / Device Role / Timing Role: Main 5V system rail generator; soft-start (programmable via SS pin) prevents inrush tripping of upstream 24V fuse. Use Value: Programmable 4ms soft-start eliminates cold-start NTC thermistor; precision EN threshold enables reliable power sequencing with other rails. |
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/2A, 2.2MHz, no FSS, 30μA IQ, QFN-10 package | Limited to 2A output; higher fSW reduces inductor size but increases EMI risk without FSS | Choose for space-constrained 2A designs where EMI filtering is already implemented externally. |
| TPS54560BQPWPRQ1 | 60V/5A, 100–2500kHz adjustable fSW, no integrated FSS, 14μA IQ, HTSSOP-20 package | Higher VIN rating but larger footprint; lacks proprietary ringing suppression and FSS | Prefer for automotive 60V transient environments where AEC-Q100 qualification is mandatory. |
Compared with MPQ4420AGL-A-Z and TPS54560BQPWPRQ1, the AP64501SP-13 uniquely combines 5A capability, SO-8EP thermal performance, integrated FSS, and ringing-free gate drive-enabling lower-system-cost, EMC-compliant 5V/12V/24V PoL designs without external EMI mitigation.
Availability
AP64501SP-13 is available at Aetrix Electronics and suitable for industrial power tools, home audio amplifiers, and network infrastructure equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for AP64501SP-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 AP64501SP-13 belongs to Diodes' high-efficiency DC-DC converter product line, engineered specifically for EMI-sensitive industrial and consumer applications requiring wide-input, low-IQ, and robust protection features.
FAQ
What is the minimum recommended input voltage for reliable startup?
The AP64501SP-13 has a guaranteed undervoltage lockout (UVLO) rising threshold of 3.5V and hysteresis of 400mV. Reliable startup occurs at VIN ≥ 3.7V, with full 5A operation supported from 3.8V. Below 3.5V, the device remains disabled to prevent unstable regulation or excessive MOSFET conduction losses.
Can the soft-start time be adjusted, and how is it calculated?
Yes, soft-start time is set by an external capacitor (Css) from SS pin to GND. An internal 4μA current source charges Css, yielding tSS ≈ (Css × 0.8V) / 4μA. For example, a 10nF capacitor produces ~2ms ramp; 22nF yields ~4.4ms. This linear ramp prevents output overshoot and inrush current during power-up.
How does the AP64501SP-13 achieve EMI reduction without external components?
It integrates two EMI-reduction techniques: a proprietary multi-level gate driver that damps SW node ringing while preserving fast edge rates, and frequency spread spectrum (FSS) with ±6% switching frequency jitter. Together, they reduce peak radiated emissions by >10dB in the 30–1000MHz band, eliminating need for snubbers or shielded inductors.
Is the SO-8EP package compatible with standard SO-8 reflow profiles?
Yes-the SO-8EP footprint matches JEDEC MS-012AC, and its thermal pad design complies with IPC-7351B. Standard lead-free reflow profiles (peak 260°C, 60s above 217°C) are supported. However, the exposed pad must be fully soldered to a ≥2cm² GND plane; insufficient thermal relief causes premature thermal shutdown at >3A load.
AP64501SP-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:
- 570kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP64501SP-13 FAQ
1.How can I place an order for AP64501SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP64501SP-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 AP64501SP-13 reliable?
The price and inventory of AP64501SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP64501SP-13 is usually 5 days.
3.What payment methods are accepted for AP64501SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP64501SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP64501SP-13?
AP64501SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP64501SP-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 AP64501SP-13?
For technical support, including AP64501SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP64501SP-13 requirements.
6.How does Aetrix verify that AP64501SP-13 is sourced from the original manufacturer or authorized distributors?
All AP64501SP-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 AP64501SP-13 meets industry standards.
7.What is the process for return or replacement of AP64501SP-13?
All AP64501SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP64501SP-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 AP64501SP-13 part is unused and in its original packaging.
Return procedure for AP64501SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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