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Diodes Incorporated AP64203QFVBW-13
- Part No.:
- AP64203QFVBW-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 16-UQFN Exposed Pad
- Datasheet:
-
AP64203QFVBW-13.pdf
- Description:
- IC REG BUCK ADJ 2A U-QFN4040-16
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP64203QFVBW-13 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive synchronous buck converter with integrated 185mΩ high-side and 80mΩ low-side MOSFETs, 3.8V–40V input range, 2A continuous output, adjustable 300kHz–2.5MHz switching frequency (default 500kHz), and 0.8V feedback reference. It delivers up to 95% efficiency in distributed power systems for infotainment and ADAS ECUs.
For engineers reviewing the AP64203QFVBW-13 datasheet, AP64203QFVBW-13 pinout, AP64203QFVBW-13 application, or AP64203QFVBW-13 equivalent, key selection considerations include its bias-assisted low-IQ operation (40µA typ), ±5% power-good detection with internal 5MΩ pullup, soft-start programmability (1.7ms default), and PFM/PWM mode selection via MSYNC pin.
Technical Context
The AP64203QFVBW-13 implements current-mode control with internal compensation, enabling stable loop response across wide capacitive load ranges without external compensation components. Its zero-crossing detection and valley-current limiting support robust light-load PFM operation while maintaining tight regulation during transient steps.
It integrates dual gate drivers with bootstrap (BST) circuitry for high-side n-FET drive, supports pre-biased startup, and features hiccup-mode overcurrent protection plus thermal shutdown at +165°C with +20°C hysteresis. The BIAS pin enables efficiency optimization by sourcing VCC regulator current from VOUT when ≥4.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 40V - supports 12V/24V automotive battery rails with cold-crank margin down to 3.8V. |
| IOUT Continuous | 2A - sustains full load without derating at TA ≤ +105°C with proper PCB thermal layout. |
| fSW Adjustable | 300kHz to 2.5MHz - selectable via resistor on FS pin; default 500kHz balances EMI and efficiency. |
| VFB Reference | 0.800V ±12mV - sets output voltage via external resistor divider; enables 0.8V–36V regulation range. |
| IQ | 40µA typical - ultra-low quiescent current enables always-on subsystems with minimal standby drain. |
| Power Good Accuracy | ±5% window (90–99% UV rising, 102–108% OV falling) - ensures reliable system sequencing and fault reporting. |
| Thermal Protection | 165°C shutdown with 20°C hysteresis - prevents permanent damage during overload or poor heatsinking. |
Pinout & Package
The AP64203QFVBW-13 is housed in a Green U-QFN4040-16/SWP (Type UXB) package with exposed thermal pad (EPAD) requiring solder connection to GND plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS (1) | Bias supply selector | Sources VCC regulator current when ≥4.5V (e.g., tied to VOUT); reduces die heating vs. VIN sourcing. |
| VCC (2) | Internal LDO output | Requires 1µF ceramic bypass to PGND; powers gate drivers and control logic; inactive when EN = low. |
| VIN (3,4) | Main power input | Accepts 3.8V–40V; must be bypassed with bulk capacitor near pins to suppress ripple and EMI. |
| BST (5) | Bootstrap supply | Connects 0.1µF+ capacitor between BST and SW to generate gate drive voltage for high-side MOSFET. |
| SW (6,7) | Switch node | Drives external LC filter; high dv/dt node requiring tight layout and minimized trace area to reduce EMI. |
| PGND (8,9) | Power ground return | Low-impedance path for high-current switch return; must connect directly to EPAD and input/output caps. |
| EN (10) | Enable control | Active-high digital input (1.38–1.52V threshold); connect to VIN for automatic startup. |
| FS (11) | Frequency set | Resistor-to-GND sets fSW; open or tied to VCC yields default 500kHz operation. |
| MSYNC (12) | Mode/sync control | Tie to GND for PFM; VCC for forced PWM; external clock for synchronization (300kHz–2.5MHz). |
| PG (13) | Open-drain power-good | Asserts low during soft-start or out-of-regulation; internal 5MΩ pullup enables direct MCU monitoring. |
| SS/TR (14) | Soft-start/tracking | Capacitor-to-GND sets ramp time; tie to VCC for 1.7ms internal soft-start; supports ratiometric sequencing. |
| FB (15) | Feedback input | Compares divided VOUT against 0.8V reference; sets output voltage via R1/R2 divider (R1 = R2 × (VOUT/0.8 − 1)). |
| GND (16) | Analog ground | Reference for error amplifier and comparators; single-point connection to EPAD minimizes noise coupling. |
| EPAD | Thermal pad | Must be soldered to solid GND plane with ≥9 thermal vias (0.3mm diameter) for θJA = 30°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C ambient operation with HBM ±2500V and CDM ±1500V ESD robustness. |
| Integrated power stage | 185mΩ HS + 80mΩ LS MOSFETs eliminate external FETs and drivers, reducing BOM count and layout complexity. |
| Enhanced efficiency mode | BIAS pin allows VCC regulator to draw from VOUT instead of VIN, cutting conduction loss at high VIN. |
| Programmable soft-start | External capacitor on SS/TR enables precise ramp control (1.7ms default) and ratiometric tracking across multiple rails. |
| PFM/PWM mode selection | MSYNC pin selects light-load PFM (high efficiency) or forced PWM (low-noise, fixed-frequency) operation. |
| Pre-biased output startup | Supports startup into pre-charged output capacitors without reverse current flow or output overshoot. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powering SoC, DDR memory, and display interface in head-unit or digital cluster with 12V battery input. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator delivering 1.1V/3A and 3.3V/2A rails with sequencing and power-good signaling. Use Value: AEC-Q100 qualification ensures reliability in vehicle cabin environments; 95% peak efficiency reduces thermal load on compact PCBs. |
Use Scenario: Generating clean 1.8V and 2.8V supplies for CMOS image sensors and ISP processors in surround-view cameras. IC Role / Device Role / Timing Role: Dual-rail buck converter with ratiometric soft-start and independent PG outputs for sensor initialization timing control. Use Value: Pre-biased startup prevents sensor latch-up; PFM mode maintains <100µA system sleep current during parking mode. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Subsystem |
|
Use Scenario: Providing isolated 5V and 3.3V rails for LTE modem, GNSS receiver, and CAN transceivers in cellular-connected ECUs. IC Role / Device Role / Timing Role: High-input-voltage buck converter supporting 40V load-dump transients while regulating downstream LDO inputs. Use Value: 40V max input withstands ISO 7637-2 Pulse 5a; hiccup OCP prevents thermal runaway during short-circuit faults. |
Use Scenario: Powering microcontroller, LIN transceivers, and LED drivers in door modules or seat controllers with 12V supply. IC Role / Device Role / Timing Role: Compact, low-IQ buck regulator enabling always-on wake-up capability with <5µA total system standby current. Use Value: 40µA IQ extends battery life in key-off state; EN pin enables deep-sleep entry synchronized with MCU GPIO. |
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-AEC1-Z | 4.5V–60V input, 2A, fixed 500kHz, no BIAS pin, higher IQ (65µA) | Lacks bias-assisted efficiency mode; less suitable for high-VIN/low-IQ designs | Choose if wider input range (60V) is required and BIAS optimization is unnecessary. |
| TPS54202HQRTERQ1 | 4.5V–28V input, 2A, 400kHz–2.5MHz, integrated compensation, no PFM mode | Lower max input limits out for 40V load-dump; fixed PWM only limits light-load efficiency | Prefer when strict EMI control via fixed-frequency operation is prioritized over ultra-low IQ. |
Compared with MPQ4420AGL-AEC1-Z and TPS54202HQRTERQ1, the AP64203QFVBW-13 uniquely combines 40V input tolerance, bias-enabled low-IQ, and selectable PFM/PWM-making it optimal for automotive subsystems demanding both robustness and standby efficiency.
Availability
AP64203QFVBW-13 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply under AEC-Q100 compliance and IATF 16949 manufacturing controls.
Supply support for AP64203QFVBW-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with emphasis on high-reliability and AEC-Q100-qualified products.
The AP64203Q belongs to Diodes' automotive-grade DC-DC converter product line, designed specifically for demanding vehicle subsystems where input transients, thermal constraints, and long-term reliability are critical.
FAQ
What is the minimum input voltage required for reliable startup?
The AP64203QFVBW-13 requires a minimum VIN of 3.8V to initiate startup and maintain regulation. Below this, the internal UVLO circuit disables the controller. Startup is guaranteed at 3.8V even at -40°C, and the device supports cold-crank conditions common in 12V automotive systems.
How does the BIAS pin improve efficiency in high-input-voltage applications?
When BIAS is connected to VOUT ≥4.5V, the internal 4.8V VCC regulator draws current from BIAS instead of VIN, eliminating conduction loss through the VIN-to-VCC LDO. This reduces die temperature and improves full-load efficiency by up to 1.5% at VIN = 24V–40V, as confirmed in DS46205 Figure 14.
Can the AP64203QFVBW-13 operate without an external soft-start capacitor?
Yes - tying SS/TR to VCC activates the internal 1.7ms soft-start timer. No external capacitor is needed for basic startup. However, adding a capacitor (e.g., 1nF for ~1ms, 10nF for ~10ms) enables precise ramp control and ratiometric tracking across multiple converters in multi-rail systems.
What is the recommended layout practice for the EPAD and PGND connections?
The EPAD must be soldered to a solid GND plane using ≥9 thermal vias (0.3mm diameter, spaced ≤1mm apart) connecting to inner-layer GND planes. PGND pins (8,9) and EPAD should share a low-inductance copper pour with minimal separation to minimize ground bounce and ensure accurate current sensing and thermal dissipation.
AP64203QFVBW-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-UQFN 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):
- 3.8V
- Voltage - Output (Max):
- 36V
- Current - Output:
- 2A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- U-QFN4040-16/SWP (Type UXB)
AP64203QFVBW-13 FAQ
1.How can I place an order for AP64203QFVBW-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP64203QFVBW-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 AP64203QFVBW-13 reliable?
The price and inventory of AP64203QFVBW-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP64203QFVBW-13 is usually 5 days.
3.What payment methods are accepted for AP64203QFVBW-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP64203QFVBW-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP64203QFVBW-13?
AP64203QFVBW-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP64203QFVBW-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 AP64203QFVBW-13?
For technical support, including AP64203QFVBW-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP64203QFVBW-13 requirements.
6.How does Aetrix verify that AP64203QFVBW-13 is sourced from the original manufacturer or authorized distributors?
All AP64203QFVBW-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 AP64203QFVBW-13 meets industry standards.
7.What is the process for return or replacement of AP64203QFVBW-13?
All AP64203QFVBW-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP64203QFVBW-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 AP64203QFVBW-13 part is unused and in its original packaging.
Return procedure for AP64203QFVBW-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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