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Diodes Incorporated AP63203WU-7
- Part No.:
- AP63203WU-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AP63203WU-7.pdf
- Description:
- IC REG BUCK 3.3V 2A TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:11,974
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Product details
Overview
AP63203WU-7 from Diodes Incorporated is a 3.8V–32V input, 2A synchronous buck converter with fixed 3.3V output, integrated 125mΩ high-side and 68mΩ low-side MOSFETs, 1.1MHz switching frequency, ±6% frequency spread spectrum (FSS), and 22µA quiescent current. It delivers high-efficiency DC/DC conversion for industrial power rails and consumer electronics requiring low EMI and stable light-load performance.
For engineers reviewing the AP63203WU-7 datasheet, AP63203WU-7 pinout, AP63203WU-7 application, or AP63203WU-7 equivalent, this device supports fixed-output 3.3V regulation in TSOT26 packaging, features precision enable threshold (1.18V), hiccup-mode overcurrent protection, thermal shutdown at +160°C, and optimized EMI reduction via proprietary gate drive and FSS-critical for noise-sensitive 12V/24V distributed supplies.
Technical Context
The AP63203WU-7 implements peak current mode control with internal slope compensation and a fixed 1.1MHz oscillator, enabling stable regulation across 3.8V–32V input while maintaining CCM down to full 2A load. Its feedback loop references a precise 3.30V ±1% internal voltage, eliminating external resistor networks.
EMI suppression is achieved through dual mechanisms: ±6% frequency jitter spreads spectral energy, and a multi-level gate driver eliminates SW node ringing without degrading rise/fall times-verified in Figure 23 of DS41326 Rev. 3-2. The device enters PFM below ~450mA peak inductor current, sustaining up to 88% efficiency at 5mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 32V DC - supports wide-input industrial and automotive-derived bus voltages without pre-regulation. |
| Output Voltage | Fixed 3.30V ±1% - eliminates external feedback resistors and ensures tight regulation for MCU/FPGA I/O rails. |
| Switching Frequency | 1.1MHz - enables compact LC filter design with ≤4.7µH inductors and reduces audible noise vs. 500kHz variants. |
| Quiescent Current | 22µA typical - extends battery life in always-on systems and enables >10-year shelf-life in low-power IoT nodes. |
| RDS(ON) HS / LS | 125mΩ / 68mΩ - minimizes conduction loss at 2A, supporting >90% efficiency at mid-load under 12V input. |
| FSS Jitter | ±6% - spreads conducted/radiated emissions across ~66kHz bandwidth, easing CISPR 32 Class B compliance. |
| Thermal Shutdown | +160°C with +25°C hysteresis - protects silicon during sustained overload while allowing recovery at +135°C junction. |
Pinout & Package
AP63203WU-7 is housed in a thermally enhanced, RoHS-compliant TSOT26 package (2.9mm × 1.6mm × 0.6mm), optimized for high-power density PCB layouts with minimal thermal pad area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback sensing input | Monitors regulated 3.3V output directly-no external divider required; connects to output capacitor node for stability. |
| 2 EN | Enable control input | Digital on/off control with 1.18V rising threshold; internal 1.5µA pull-up enables auto-start when tied to VIN. |
| 3 VIN | Main power input | Accepts 3.8V–32V; requires local 10µF ceramic bypass to GND to suppress switching transients. |
| 4 GND | Power ground reference | Common return for VIN, SW, BST, and FB; must be low-impedance copper pour connected to thermal pad. |
| 5 SW | Switching node output | Drives external inductor; exhibits ringing-free waveform in PFM mode per Figure 23-reduces radiated EMI. |
| 6 BST | Bootstrap supply for HS gate | Requires 100nF capacitor from SW to BST to sustain high-side MOSFET drive during 100% duty cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 125mΩ HS + 68mΩ LS MOSFETs - eliminates discrete switch selection, layout complexity, and gate driver design. |
| EMI-Optimized Switching | FSS ±6% + ringing-free SW node - achieves CISPR 32 margin without added ferrites or shielding in typical 4-layer boards. |
| Light-Load Efficiency | 88% at 5mA in PFM mode - sustains ultra-low standby power for always-on audio, sensor, and remote-control subsystems. |
| Robust Protection Suite | Cycle-by-cycle OCP (2.8A typ), UVLO (3.5V), and thermal shutdown (+160°C) - prevents damage during input dips, shorts, or airflow loss. |
| Soft-Start Control | 4ms internal ramp - limits inrush current into output capacitors, avoiding input rail collapse during cold start. |
Applications
| Flat Screen TV & Monitor Power | Industrial 24V Distributed Bus |
|---|---|
|
Use Scenario: Generating clean 3.3V for HDMI interface ICs, display controllers, and touch panel MCUs from noisy 12V/24V main rails. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated, low-noise 3.3V with fast transient response to handle burst data traffic. Use Value: Fixed 3.3V output eliminates calibration drift; FSS and ringing-free SW reduce pixel noise and EMI-induced video artifacts. |
Use Scenario: Powering PLC I/O modules, fieldbus transceivers, and sensor signal conditioners from unregulated 24V factory wiring. IC Role / Device Role / Timing Role: High-reliability buck converter operating continuously across -40°C to +85°C ambient with no derating below 1.8A at 50°C. Use Value: 125mΩ/68mΩ RDS(ON) and 89°C/W θJA enable full 2A output without heatsink in confined enclosures. |
| Home Audio Amplifier Logic Rails | Gaming Console Peripheral Supplies |
|
Use Scenario: Supplying 3.3V to DSPs, DACs, and USB audio controllers in smart speakers and soundbars with strict acoustic noise limits. IC Role / Device Role / Timing Role: Low-IQ, low-ripple regulator minimizing ground bounce and coupling into analog audio paths. Use Value: 22µA IQ and PFM operation eliminate switching noise in standby; 1.1MHz frequency avoids audible band interference. |
Use Scenario: Providing 3.3V to USB-C PD controllers, RGB lighting ICs, and wireless module logic in gamepad and headset subsystems. IC Role / Device Role / Timing Role: Compact, efficient step-down stage supporting rapid power-state transitions between active/idle modes. Use Value: TSOT26 footprint saves board space; hiccup-mode OCP prevents thermal runaway during accidental short-circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3.3V fixed output, 2A, 2MHz switching, 30µA IQ, no FSS, 150mΩ/85mΩ MOSFETs | Lacks EMI-optimized gate drive and FSS; higher RDS(ON) increases conduction loss above 1A | Prefer AP63203WU-7 where CISPR 32 compliance or thermal headroom at 2A is critical |
| TPS562201DDCR | 3.3V fixed output, 2A, 650kHz, 19µA IQ, integrated compensation, no FSS | Lower switching frequency requires larger inductor; no EMI spread spectrum or ringing suppression | Choose AP63203WU-7 for designs needing 1.1MHz size reduction and certified low-radiation performance |
Compared with MP2451DT-LF-Z and TPS562201DDCR, AP63203WU-7 uniquely combines 1.1MHz operation, ±6% FSS, and a proprietary gate driver to achieve lower radiated emissions without sacrificing efficiency or thermal performance-making it optimal for space-constrained, noise-sensitive applications.
Availability
AP63203WU-7 is available at Aetrix Electronics and suitable for flat screen TV sets, industrial 24V distributed power buses, and home audio systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for AP63203WU-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, with core expertise in power management, signal integrity, and protection devices.
AP63203WU-7 belongs to the AP632xx family of EMI-optimized synchronous buck converters, designed specifically for noise-sensitive consumer, industrial, and computing applications demanding high efficiency, small footprint, and robust reliability across wide input ranges.
FAQ
What is the recommended input capacitor for AP63203WU-7?
A minimum 10µF X5R/X7R ceramic capacitor placed within 3mm of the VIN and GND pins is required to suppress high-frequency switching noise. For improved ripple rejection and hold-up time, pair it with a 22µF–47µF bulk capacitor. The datasheet specifies low-ESR ceramics only-aluminum or tantalum caps are not recommended due to instability risks under peak current stress.
Does AP63203WU-7 require an external soft-start capacitor?
No. AP63203WU-7 integrates a 4ms internal soft-start timer that ramps the COMP voltage linearly, eliminating inrush current and output overshoot without external components. Adding an external capacitor to the EN pin can delay startup timing for power sequencing, but it does not alter the internal soft-start profile or duration.
Can AP63203WU-7 operate with zero load current?
Yes. In PFM mode, AP63203WU-7 automatically discontinues switching when output current drops below ~100µA, reducing IQ to 22µA and preventing reverse current flow. The device maintains regulation and resumes PWM seamlessly upon load step-up, with no minimum load requirement or external bias needed.
How is overvoltage protection implemented in AP63203WU-7?
OVP triggers if FB voltage exceeds 110% of nominal (3.63V), disabling both MOSFETs and holding SW at GND until the fault clears. Recovery is automatic after VFB falls below 3.47V. This protection operates independently of the error amplifier and remains active in all modes-including PFM and shutdown-ensuring safety during feedback network failure or output capacitor disconnection.
AP63203WU-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.8V
- Voltage - Input (Max):
- 32V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 1.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
AP63203WU-7 FAQ
1.How can I place an order for AP63203WU-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP63203WU-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 AP63203WU-7 reliable?
The price and inventory of AP63203WU-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP63203WU-7 is usually 5 days.
3.What payment methods are accepted for AP63203WU-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP63203WU-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP63203WU-7?
AP63203WU-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP63203WU-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 AP63203WU-7?
For technical support, including AP63203WU-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP63203WU-7 requirements.
6.How does Aetrix verify that AP63203WU-7 is sourced from the original manufacturer or authorized distributors?
All AP63203WU-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 AP63203WU-7 meets industry standards.
7.What is the process for return or replacement of AP63203WU-7?
All AP63203WU-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP63203WU-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 AP63203WU-7 part is unused and in its original packaging.
Return procedure for AP63203WU-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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