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Diodes Incorporated AP63300WU-7
- Part No.:
- AP63300WU-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AP63300WU-7.pdf
- Description:
- IC REG BUCK ADJ 3A TSOT26
- Quantity:
- Payment:
- Shipping:
Inventory:2,746
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Product details
Overview
AP63300WU-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, 0.8V ±1% reference voltage, 22µA quiescent current in PFM mode, and 500kHz fixed switching frequency. It delivers regulated 5V/3.3V point-of-load power for FPGA, DSP, and consumer electronics with enhanced EMI reduction via ringing-free gate drive and ±6% frequency spread spectrum (FSS).
For engineers reviewing the AP63300WU-7 datasheet, AP63300WU-7 pinout, AP63300WU-7 application, or AP63300WU-7 equivalent, key selection criteria include its TSOT26 package footprint, EN pin programmable UVLO, 4ms soft-start, cycle-by-cycle current limiting, and thermal shutdown at 160°C - all critical for industrial and embedded power rail design.
Technical Context
The AP63300WU-7 employs peak current mode control with internal slope compensation to ensure stability at duty cycles >50%, and integrates loop compensation to eliminate external compensation components. Its proprietary multi-level gate driver suppresses SW node ringing without degrading rise/fall times, directly reducing high-frequency radiated EMI.
It operates in forced PWM under heavy load and transitions to PFM below ~930mA peak inductor current, clamping COMP voltage and enabling zero-cross detection at 60mA valley current to halt switching and achieve 88% efficiency at 5mA load - enabled by a dedicated 22µA quiescent current path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 32V DC - supports direct connection to 5V, 12V, and 24V distributed bus rails without pre-regulation. |
| Output Current | 3A continuous - sustains full load across -40°C to +85°C ambient with θJA = 89°C/W in TSOT26. |
| Feedback Reference | 0.800V ±1% - enables precise output setting (e.g., 5V via 158kΩ/30.1kΩ divider) with <±2mV drift over temperature. |
| Quiescent Current | 22µA typical in PFM no-load - minimizes standby power loss in battery-backed or always-on systems. |
| Switching Frequency | 500kHz ±10% - balances inductor size and EMI; FSS adds ±6% jitter to spread spectral energy and ease CISPR-22/32 compliance. |
| EMI Reduction | Ringing-free SW node + FSS - eliminates need for snubbers or additional shielding in noise-sensitive audio/video applications. |
| Protection Features | UVLO (3.5V rising), OVP (0.84V threshold), thermal shutdown (160°C), and cycle-by-cycle current limit (4.5A typical) - ensures robust operation during line transients and fault conditions. |
Pinout & Package
AP63300WU-7 is housed in a thermally enhanced TSOT26 package (2.9mm × 1.6mm × 0.7mm, 0.95mm pitch), optimized for high-power density and PCB heat dissipation via exposed pad (GND-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Feedback sensing input | Connects to resistor divider output; regulates VOUT by comparing against 0.8V internal reference - sets accuracy and transient response bandwidth. |
| EN (Pin 2) | Enable control with precision UVLO | Logic-high threshold = 1.18V; internal 1.5µA pull-up enables auto-start; external resistive divider programs custom VIN UVLO thresholds. |
| VIN (Pin 3) | Main power input | Supplies IC bias and high/low-side MOSFETs; requires ≥10µF ceramic bypass to GND near pin for stable switching and noise suppression. |
| GND (Pin 4) | Power ground reference | Common return for VIN, SW, BST, and FB; must be connected to large copper pour for thermal and EMI performance. |
| SW (Pin 5) | Switching node output | Drives external inductor; carries high di/dt; layout must minimize loop area to reduce EMI and voltage spikes. |
| BST (Pin 6) | Bootstrap supply for high-side gate | Requires 100nF ceramic capacitor from BST to SW to sustain gate drive voltage during HS conduction; critical for efficiency and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 75mΩ HS + 40mΩ LS MOSFETs - eliminates external switch losses and reduces BOM count; enables >90% efficiency at 1A–3A loads. |
| Frequency Spread Spectrum (FSS) | ±6% switching frequency jitter - spreads conducted/radiated EMI peaks across 450–550kHz band, easing EMC filter design and certification. |
| Pulse Frequency Modulation (PFM) | 22µA IQ with 88% efficiency at 5mA - extends battery life in always-on IoT sensors and remote controls without sacrificing light-load regulation. |
| Proprietary Gate Driver | Ringing-free SW node - suppresses MHz-range oscillations without slowing edge rates, reducing need for ferrite beads or RC snubbers. |
| Programmable UVLO | 1.18V EN threshold + 4µA hysteresis current source - allows precise adjustment of input turn-on/off voltages using two external resistors. |
Applications
| Industrial Motor Drives | FPGA Core Power |
|---|---|
Use Scenario: Powering gate drivers and logic in 24V servo amplifier modules where EMI must not interfere with encoder feedback signals. IC Role / Device Role / Timing Role: Primary 5V/3A buck regulator supplying isolated gate driver ICs and microcontroller I/O rails. Use Value: FSS and ringing-free SW node reduce radiated emissions below 30MHz, eliminating rework on motor control PCB layouts. | Use Scenario: Delivering clean, tightly regulated 1.2V core voltage to Xilinx Artix-7 FPGA in test equipment with strict ripple limits (<20mVpp). IC Role / Device Role / Timing Role: Point-of-load converter with fast load transient response (2A→3A step in <1ms) and 0.8V reference accuracy. Use Value: Integrated loop compensation and 4ms soft-start prevent FPGA configuration failure due to VCCINT overshoot or undershoot. |
| Smart TV Backlight Control | Network Router PoL |
Use Scenario: Generating 3.3V/2A for LED driver ICs and HDMI interface circuitry in 4K UHD flat-panel TVs subject to CISPR-32 Class B limits. IC Role / Device Role / Timing Role: Secondary buck stage downstream of main 12V bus; operates in PWM mode for constant ripple control. Use Value: ±6% FSS shifts EMI energy away from narrowband RF bands used by Wi-Fi/Bluetooth coexistence testing. | Use Scenario: Providing 5V/3A to Ethernet PHYs and packet processors in enterprise-grade routers requiring high reliability and thermal margin. IC Role / Device Role / Timing Role: Main system rail regulator with thermal shutdown (160°C) and cycle-by-cycle current limiting for sustained 100% load at 70°C ambient. Use Value: TSOT26 package with exposed GND pad achieves 89°C/W θJA, enabling fanless operation in compact 1U chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 36V max input, 2A output, no FSS, 300kHz fixed frequency, 2.5µA IQ in shutdown only | Lacks EMI-reduction features; suitable for cost-sensitive non-EMI-critical industrial supplies | Select when EMI certification is not required and input voltage exceeds 32V. |
| TPS563201DDFR | 17V max input, 3A output, 500kHz, 19µA IQ in Eco-mode, no FSS, smaller SOT563 package | Lower VIN range limits use to 12V systems; lacks programmable UVLO and ringing suppression | Prefer for space-constrained 12V designs where thermal performance is less critical than footprint. |
Compared with MP2451DT-LF-Z and TPS563201DDFR, AP63300WU-7 uniquely combines 32V input capability, integrated EMI mitigation (FSS + ringing-free drive), and 22µA PFM IQ - making it optimal for 24V consumer/industrial systems needing certified low-noise operation without external filtering.
Availability
AP63300WU-7 is available at Aetrix Electronics and suitable for FPGA power delivery, smart TV subsystems, and industrial motor drives requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AP63300WU-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and protection applications.
The AP63300WU-7 belongs to Diodes' high-efficiency, EMI-optimized buck converter product line, designed specifically for noise-sensitive consumer, computing, and industrial point-of-load applications demanding wide VIN range and ultra-low quiescent current.
FAQ
What is the minimum input voltage required for AP63300WU-7 to start up?
The AP63300WU-7 has a guaranteed undervoltage lockout (UVLO) rising threshold of 3.5V, with typical activation at 3.7V. Startup occurs when VIN exceeds this threshold and the EN pin voltage rises above 1.18V. If EN is left floating, the internal 1.5µA pull-up ensures automatic enable once VIN reaches the UVLO threshold.
Can AP63300WU-7 operate in forced PWM mode at all load levels?
No - AP63300WU-7 is the PFM-optimized variant and automatically transitions from PWM to PFM below ~930mA peak inductor current. For forced PWM across all loads, the AP63301WU-7 variant must be used; it maintains constant 500kHz switching regardless of output current.
How is the output voltage set, and what tolerance does the feedback reference have?
Output voltage is set using a resistive divider from VOUT to GND, connected to the FB pin. The internal reference is 0.800V ±1% (792–808mV) over -40°C to +85°C, ensuring ±1.25% total output tolerance with standard 1% resistors. Typical application uses 158kΩ (R1) and 30.1kΩ (R2) for 5.0V output.
Does AP63300WU-7 require an external bootstrap capacitor, and what value is recommended?
Yes - a 100nF ceramic capacitor (X7R, 10V rating) is required between BST and SW pins to charge the high-side gate driver. This capacitor must be placed as close as possible to the BST/SW pins with short, low-inductance traces to maintain gate drive strength and prevent shoot-through during switching transitions.
AP63300WU-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
AP63300WU-7 FAQ
1.How can I place an order for AP63300WU-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP63300WU-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 AP63300WU-7 reliable?
The price and inventory of AP63300WU-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP63300WU-7 is usually 5 days.
3.What payment methods are accepted for AP63300WU-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP63300WU-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP63300WU-7?
AP63300WU-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP63300WU-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 AP63300WU-7?
For technical support, including AP63300WU-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP63300WU-7 requirements.
6.How does Aetrix verify that AP63300WU-7 is sourced from the original manufacturer or authorized distributors?
All AP63300WU-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 AP63300WU-7 meets industry standards.
7.What is the process for return or replacement of AP63300WU-7?
All AP63300WU-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP63300WU-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 AP63300WU-7 part is unused and in its original packaging.
Return procedure for AP63300WU-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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