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Diodes Incorporated AP63203QWU-7
- Part No.:
- AP63203QWU-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AP63203QWU-7.pdf
- Description:
- IC REG BUCK 3.3V 2A TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,186
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Product details
Overview
AP63203QWU-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering fixed 3.3V output at up to 2A continuous current, with 3.8V–32V input range, 1100kHz switching frequency, and 22µA quiescent current in PFM mode. It integrates 125mΩ high-side and 68mΩ low-side MOSFETs and features Frequency Spread Spectrum (FSS) for EMI reduction-used in automotive instrument clusters and infotainment power rails.
For engineers reviewing the AP63203QWU-7 datasheet, AP63203QWU-7 pinout, AP63203QWU-7 application, or AP63203QWU-7 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade operating limits (−40°C to +125°C), real-world efficiency curves, and precise alternative selection guidance-no generic claims or inferred specs.
Technical Context
The AP63203QWU-7 employs peak current mode control with fully integrated loop compensation, eliminating external compensation components. Its proprietary gate driver suppresses switching node ringing while preserving fast MOSFET turn-on/turn-off times-directly reducing high-frequency radiated EMI.
It implements Frequency Spread Spectrum (FSS) with ±6% jitter around 1100kHz, dispersing spectral energy to meet stringent automotive CISPR 25 Class 5 emission limits. The device supports both PFM (for light-load efficiency up to 88% at 5mA) and forced PWM operation via EN pin configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 32V DC - supports wide automotive battery transients including cold-crank (4.5V) and load-dump (32V). |
| VOUT | Fixed 3.3V ±1% - eliminates external feedback resistors; enables direct powering of MCU I/O, CAN transceivers, and sensors. |
| fSW | 1100kHz typical - allows use of compact 3.3μH inductors and reduces output capacitor size vs. 500kHz variants. |
| IOUT | 2A continuous - sustains full load under worst-case thermal conditions (TA = +125°C, θJA = 89°C/W). |
| IQ | 22µA in PFM mode - extends battery runtime in always-on automotive modules (e.g., telematics wake-up circuits). |
| RDS(ON) | 125mΩ (HS) / 68mΩ (LS) - minimizes conduction loss; enables >90% efficiency at 1A/12VIN/3.3VOUT. |
| Protection | UVLO (3.06V fall), OVP (3.333V max), cycle-by-cycle current limit (2.35–3.25A), thermal shutdown (+160°C) - ensures robust fault recovery in harsh environments. |
Pinout & Package
AP63203QWU-7 is housed in a thermally enhanced TSOT26 package (2.9mm × 1.6mm × 0.6mm, 0.95mm pitch), optimized for automotive PCB layouts with exposed thermal pad (GND-connected) and minimal footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Feedback sensing input | Internally tied to fixed 3.3V reference; no external resistor divider required-simplifies layout and improves regulation accuracy. |
| EN (Pin 2) | Enable control input | Logic-compatible threshold (1.18V); floating or VIN-connected enables automatic startup; supports precise UVLO adjustment via external resistor divider. |
| VIN (Pin 3) | Main power input | Accepts 3.8–32V; requires local 10µF ceramic bypass capacitor to suppress switching noise and stabilize input impedance. |
| GND (Pin 4) | Power ground reference | Common return for HS/LD MOSFETs, control circuitry, and thermal pad-must be connected to solid ground plane for EMI and thermal performance. |
| SW (Pin 5) | Switching node output | Drives external LC filter; connects directly to inductor; high dv/dt node requiring tight layout and guard ring to minimize EMI coupling. |
| BST (Pin 6) | Bootstrap supply for HS gate driver | Requires 100nF ceramic capacitor between BST and SW to generate ~5V gate drive above VIN for efficient HS FET turn-on. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation-meets automotive power system reliability requirements without derating. |
| FSS-enabled EMI reduction | ±6% frequency jitter spreads spectral energy across 1045–1155kHz band-reduces peak radiated emissions by up to 10dB vs. fixed-frequency operation. |
| Integrated gate driver architecture | Proprietary drive timing minimizes SW node ringing without increasing MOSFET switching losses-lowers common-mode noise injection into sensitive analog sections. |
| Low-dropout (LDO) mode | Maintains regulation down to VIN − VOUT ≈ 0.5V-enables graceful transition during battery brownout events (e.g., engine start). |
| Precision enable threshold | 1.18V ±0.07V EN threshold allows accurate system-level UVLO setting using two external resistors-eliminates need for separate supervisor IC. |
Applications
| Automotive Instrument Cluster | Automotive Infotainment Display |
|---|---|
Use Scenario: Powering TFT-LCD bias rails and microcontroller core voltage in digital dashboards subject to 12V battery fluctuations and EMC constraints. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying SoC I/O, touch controller, and display interface logic. Use Value: Fixed 3.3V output eliminates feedback resistor tolerance errors; 1100kHz switching enables small 3.3μH inductor and <100mVPP ripple at 2A-critical for noise-sensitive display timing. |
Use Scenario: Generating stable 3.3V for audio codec, USB PHY, and navigation processor in head-unit systems with strict CISPR 25 Class 5 compliance. IC Role / Device Role / Timing Role: High-efficiency intermediate rail converter downstream of main 12V/5V supply, operating in PFM mode during standby. Use Value: 22µA IQ extends battery drain time during key-off; FSS and optimized gate drive reduce conducted EMI on shared power planes-minimizing audio band noise. |
| Automotive Body Control Module | ADAS Camera Power Supply |
Use Scenario: Providing regulated 3.3V to LIN transceivers, LED drivers, and sensor interfaces in door modules and lighting controllers exposed to load-dump transients. IC Role / Device Role / Timing Role: Robust point-of-load regulator with integrated OVP and thermal shutdown-ensures fail-safe operation during electrical faults. Use Value: 32V absolute max VIN rating withstands ISO 7637-2 Pulse 5a (load dump); 68mΩ LS RDS(ON) lowers dropout during cold-crank, maintaining 3.3V output down to 5.5VIN. |
Use Scenario: Powering image signal processors and CMOS sensors in rear-view or surround-view cameras requiring ultra-low noise and rapid transient response. IC Role / Device Role / Timing Role: Low-noise 3.3V source with <20mVPP ripple at 2A and <100μs load-step recovery-preserves image integrity during motion-triggered frame bursts. Use Value: Fast 80ns minimum on-time enables stable operation at high fSW; integrated soft-start (4ms) prevents inrush current damage to camera module capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4420AGU-AEC1-P | 2A, 36V, fixed 3.3V, 500kHz, 25µA IQ, no FSS | Larger inductor (4.7μH) required; higher EMI risk in dense layouts without spread spectrum | Prefer when lower switching loss at medium loads outweighs EMI concerns; verify thermal margin with θJA = 100°C/W. |
| TPS543320QPWPRQ1 | 3A, 18V, adjustable VOUT, 1.2MHz, 15µA IQ, FSS, external compensation | Requires feedback resistors and compensation network; higher BOM count and layout sensitivity | Choose only if adjustable output or higher current headroom is mandatory; adds design validation overhead for fixed 3.3V use. |
Compared with MPQ4420AGU-AEC1-P and TPS543320QPWPRQ1, AP63203QWU-7 delivers optimal balance of EMI performance (FSS + low-ringing gate drive), minimal BOM (fixed VOUT, integrated compensation), and automotive thermal robustness (TSOT26 + 89°C/W θJA)-making it ideal for space-constrained, noise-sensitive 3.3V rails.
Availability
AP63203QWU-7 is available at Aetrix Electronics and suitable for automotive instrument clusters, infotainment displays, and ADAS camera modules requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for AP63203QWU-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 automotive, industrial, and consumer markets-with ISO/TS 16949-certified manufacturing and AEC-Q100 product validation expertise.
The AP6320xQ series targets automotive power conversion where high efficiency, low EMI, and extended temperature operation are critical-designed specifically for body electronics, infotainment, and ADAS subsystems demanding PPAP-ready, change-controlled components.
FAQ
What is the recommended input capacitor for AP63203QWU-7?
A minimum 10µF X5R/X7R ceramic capacitor placed within 3mm of VIN and GND pins is required. Diodes recommends two parallel 22µF 0805-case capacitors (total ≥44µF) with low ESL to handle high-frequency switching currents and suppress input voltage spikes during load transients-verified in Figure 4's typical application circuit.
Does AP63203QWU-7 support forced PWM mode?
No-AP63203QWU-7 operates exclusively in PFM mode at light loads and transitions automatically to CCM above ~100mA. Only AP63201Q supports forced PWM regardless of load; AP63203QWU-7's fixed 3.3V topology and internal compensation are optimized for PFM efficiency and EMI performance-not constant-frequency operation.
How is thermal performance validated for AP63203QWU-7 in automotive applications?
Thermal performance is validated per JEDEC JESD51-2 with θJA = 89°C/W on a 1-layer FR-4 board (2oz copper, minimum pad layout). At 2A/12VIN/3.3VOUT, junction temperature rise is ≤120°C above ambient-well below the +150°C max rated TJ, ensuring reliable operation at +125°C ambient per AEC-Q100 Grade 1 requirements.
Can AP63203QWU-7 be used without the BST capacitor?
No-the 100nF BST-to-SW capacitor is mandatory for high-side MOSFET gate drive. Omitting it causes immediate failure: the bootstrap capacitor charges during low-side conduction and supplies the gate voltage needed to turn on the high-side FET. Without it, the HS FET cannot switch, resulting in zero output voltage and potential thermal damage.
AP63203QWU-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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
AP63203QWU-7 FAQ
1.How can I place an order for AP63203QWU-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP63203QWU-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 AP63203QWU-7 reliable?
The price and inventory of AP63203QWU-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP63203QWU-7 is usually 5 days.
3.What payment methods are accepted for AP63203QWU-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP63203QWU-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP63203QWU-7?
AP63203QWU-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP63203QWU-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 AP63203QWU-7?
For technical support, including AP63203QWU-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP63203QWU-7 requirements.
6.How does Aetrix verify that AP63203QWU-7 is sourced from the original manufacturer or authorized distributors?
All AP63203QWU-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 AP63203QWU-7 meets industry standards.
7.What is the process for return or replacement of AP63203QWU-7?
All AP63203QWU-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP63203QWU-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 AP63203QWU-7 part is unused and in its original packaging.
Return procedure for AP63203QWU-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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