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Diodes Incorporated AP63301WU-7
- Part No.:
- AP63301WU-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AP63301WU-7.pdf
- Description:
- IC REG BUCK ADJ 3A TSOT26
- Quantity:
- Payment:
- Shipping:
Inventory:10,144
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Product details
Overview
AP63301WU-7 from Diodes Incorporated is a 3A synchronous buck DC-DC converter with 3.8V–32V input range, integrated 75mΩ high-side and 40mΩ low-side MOSFETs, fixed 500kHz switching frequency, and PWM-only operation across all load conditions. It delivers precise 0.8V ±1% feedback reference and supports industrial point-of-load regulation in FPGA/DSP power supplies and network systems.
For engineers reviewing the AP63301WU-7 datasheet, AP63301WU-7 pinout, AP63301WU-7 application, or AP63301WU-7 equivalent, key selection criteria include its 280μA quiescent current (vs. AP63300's 22μA), absence of Frequency Spread Spectrum, EMI-optimized gate driver, and TSOT26 package compatibility with space-constrained PCB layouts.
Technical Context
The AP63301WU-7 employs fixed-frequency peak current mode control with internal 500kHz oscillator and slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its error amplifier compares FB voltage against a 0.8V reference to regulate output via COMP node modulation.
It operates exclusively in forced PWM mode regardless of load - unlike the AP63300 variant - eliminating PFM transitions and ensuring consistent switching behavior, predictable EMI profile, and stable light-load transient response without discontinuous conduction mode artifacts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 32V DC - supports direct connection to 5V/12V/24V industrial bus rails without pre-regulation. |
| Output Current | 3A continuous - sustains full-rated load at +85°C ambient with recommended PCB thermal layout. |
| Feedback Voltage | 0.800V ±1% - enables accurate output setting (e.g., 5V via 158kΩ/30.1kΩ divider) with <±2mV drift over –40°C to +125°C junction range. |
| Quiescent Current | 280μA typical - optimized for always-on systems where ultra-low IQ is secondary to PWM stability. |
| Switching Frequency | 500kHz ±10% - balances inductor size (e.g., 6.8μH for 5V/3A) and EMI filter complexity. |
| RDS(ON) HS / LS | 75mΩ / 40mΩ - minimizes conduction loss at 3A, enabling >90% efficiency at mid-load with proper thermal design. |
| Protection Features | UVLO (3.5V rising), OVP (0.88V FB threshold), cycle-by-cycle current limit (4.1–4.9A), thermal shutdown (160°C) - ensures robust fault recovery in unattended equipment. |
Pinout & Package
AP63301WU-7 is housed in a thermally enhanced TSOT26 package (2.9mm × 1.6mm × 0.6mm, 0.95mm pitch), with exposed pad for improved heat dissipation (θJA = 89°C/W on 2oz FR-4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Feedback sensing input | Connects to resistor divider midpoint; regulates output by comparing against 0.8V reference - accuracy directly determines VOUT tolerance. |
| EN (Pin 2) | Enable control input | Logic-high (>1.18V) initiates 4ms soft-start; internal 1.5μA pull-up allows auto-start when floating; precision threshold enables UVLO programming. |
| VIN (Pin 3) | Main power input | Supplies IC bias and drives integrated MOSFETs; requires local 10μF ceramic bypass to suppress switching noise and stabilize input rail. |
| GND (Pin 4) | Power ground reference | Common return for VIN, SW, BST, and internal regulators - must be low-impedance path to minimize ground bounce and EMI. |
| SW (Pin 5) | Switching node output | Drives external inductor; high di/dt node requiring tight loop layout and minimized trace area to reduce radiated EMI. |
| BST (Pin 6) | Bootstrap supply for HS gate | Requires 100nF ceramic capacitor to SW to sustain high-side MOSFET drive during 100% duty cycle; critical for startup and dropout operation. |
Key Features
| Feature | Design Value |
|---|---|
| PWM-only operation | Eliminates PFM mode transitions, ensuring constant switching frequency and predictable EMI spectrum - essential for noise-sensitive audio and communication systems. |
| Proprietary gate driver | Dampens SW node ringing without degrading rise/fall times, reducing high-frequency radiated EMI while preserving efficiency and thermal performance. |
| Integrated loop compensation | Removes need for external compensation network - reduces BOM count and layout sensitivity while maintaining phase margin >45° across operating conditions. |
| Low-dropout (LDO) mode | Enables regulation down to VOUT = VIN − 0.5V (typical), supporting applications with tight input-output differentials like 5V-to-3.3V conversion. |
| Precision enable threshold | 1.18V ±70mV logic-high threshold allows accurate UVLO programming using external resistive divider - critical for multi-rail sequencing in embedded systems. |
Applications
| FPGA Core Supply | Network Router PoL |
|---|---|
Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V FPGA core rails requiring tightly regulated 1.2V/1.0V at up to 3A with fast load transient response. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering core voltage; operates in forced PWM to avoid frequency modulation-induced jitter on sensitive clock domains. Use Value: 0.8V ±1% reference and 4ms soft-start ensure ±2% output accuracy and controlled ramp-up, preventing FPGA configuration failure during power-on. | Use Scenario: Point-of-load conversion for 12V backplane to 3.3V/2.5V for Ethernet PHYs and packet processors in enterprise routers. IC Role / Device Role / Timing Role: Secondary DC-DC stage providing isolated, low-noise supply; TSOT26 footprint enables dense placement near ASICs to minimize IR drop and EMI coupling. Use Value: Integrated 75mΩ/40mΩ MOSFETs and proprietary gate driver achieve <15mVpp output ripple at 3A, meeting IEEE 802.3 compliance for PHY power integrity. |
| Industrial HMI Display | Gaming Console AV Subsystem |
Use Scenario: Powering LCD bias, LED backlight drivers, and touch controller in factory-floor HMIs exposed to 24V DC field wiring. IC Role / Device Role / Timing Role: Main 24V-to-5V converter supplying system logic and interface ICs; UVLO programmability prevents brownout resets during line fluctuations. Use Value: 32V absolute max VIN rating and 3.5V UVLO threshold tolerate 24V ±20% transients per IEC 61000-4-5, ensuring uninterrupted operation in harsh environments. | Use Scenario: Regulating 12V supply to 1.8V/1.1V for GPU memory and audio codec in compact gaming console designs. IC Role / Device Role / Timing Role: High-efficiency, low-profile buck converter placed under metal shield; PWM-only mode avoids audible switching noise in audio signal paths. Use Value: 280μA IQ enables standby power <10mW while maintaining instant wake-up - critical for quick-resume features without compromising thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP63300WU-7 | Includes Frequency Spread Spectrum (±6% fSW jitter) and PFM mode; IQ = 22μA vs. 280μA | Better suited for EMI-critical consumer audio/video where spectral spreading is mandatory; lower IQ benefits battery-backed systems | Select AP63300WU-7 if EMI certification (CISPR 32 Class B) is required and light-load efficiency dominates design priority |
| MP2451DT-LF-Z | 36V max VIN, 2A output, no integrated BST capacitor requirement, 2.2MHz fSW | Higher switching frequency enables smaller magnetics but increases switching loss; lacks precision EN threshold and UVLO programmability | Choose MP2451DT-LF-Z only when board space is severely constrained and 2A output suffices - not a drop-in replacement due to pinout and control differences |
Compared with AP63300WU-7, AP63301WU-7 trades EMI reduction and ultra-low IQ for deterministic PWM timing and higher light-load stability; versus MP2451DT-LF-Z, it offers superior thermal performance in TSOT26, programmable UVLO, and integrated gate drive optimization - making it preferred for industrial and compute applications demanding reliability over miniaturization.
Availability
AP63301WU-7 is available at Aetrix Electronics and suitable for FPGA power supplies, network router point-of-load conversion, industrial HMI displays, and gaming console AV subsystems requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for AP63301WU-7 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 solutions for industrial, computing, and consumer markets, with emphasis on power efficiency and reliability.
The AP6330x series belongs to Diodes' high-voltage synchronous buck converter product line, designed specifically for EMI-sensitive, wide-input industrial and embedded power applications where integration, thermal robustness, and precise enable control are critical.
FAQ
What is the maximum output current capability of AP63301WU-7 under continuous operation?
The AP63301WU-7 delivers 3A continuous output current across the full –40°C to +85°C ambient temperature range when mounted on a 2oz copper FR-4 PCB with minimum recommended thermal pad layout. Derating begins above +85°C ambient, with thermal shutdown activating at +125°C junction temperature to protect the device.
Does AP63301WU-7 support adjustable output voltage, and how is it configured?
Yes - output voltage is set externally via a resistive divider from VOUT to GND, connected to the FB pin. Using the 0.800V ±1% internal reference, a standard 5V output is achieved with R1 = 158kΩ and R2 = 30.1kΩ. The divider ratio must maintain FB = 0.8V; tolerance stack-up of resistors directly impacts final VOUT accuracy.
How does the EN pin function, and can it be used for power sequencing?
The EN pin enables the device when driven above 1.18V (typical); an internal 1.5μA pull-up allows automatic startup when left floating. Adding a capacitor from EN to GND delays activation, enabling controlled power-up sequencing with other rails. External resistor dividers also allow programmable UVLO thresholds for multi-supply coordination.
What thermal considerations apply to AP63301WU-7 in high-power applications?
With θJA = 89°C/W on standard FR-4, the AP63301WU-7 requires careful thermal design: the exposed pad must be soldered to a large copper pour connected to internal ground planes. At 3A and 12V input, power dissipation is ~0.6W - limiting junction rise to ~53°C above ambient with adequate copper area, well below the 160°C thermal shutdown threshold.
AP63301WU-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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):
- 32V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 31V
- Current - Output:
- 3A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-26
AP63301WU-7 FAQ
1.How can I place an order for AP63301WU-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP63301WU-7 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 AP63301WU-7 reliable?
The price and inventory of AP63301WU-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP63301WU-7 is usually 5 days.
3.What payment methods are accepted for AP63301WU-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP63301WU-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP63301WU-7?
AP63301WU-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP63301WU-7 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 AP63301WU-7?
For technical support, including AP63301WU-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP63301WU-7 requirements.
6.How does Aetrix verify that AP63301WU-7 is sourced from the original manufacturer or authorized distributors?
All AP63301WU-7 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 AP63301WU-7 meets industry standards.
7.What is the process for return or replacement of AP63301WU-7?
All AP63301WU-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP63301WU-7, 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 AP63301WU-7 part is unused and in its original packaging.
Return procedure for AP63301WU-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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