My Inquiry
My Account
Diodes Incorporated AP66300QFVBW-13
- Part No.:
- AP66300QFVBW-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 16-UQFN Exposed Pad
- Datasheet:
-
AP66300QFVBW-13.pdf
- Description:
- IC REG BUCK ADJ 3A U-QFN4040-16
- Quantity:
- Payment:
- Shipping:
Inventory:2,254
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP66300QFVBW-13 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive synchronous buck converter with integrated 120mΩ high-side and 55mΩ low-side MOSFETs, 3.8–60V input range, 3A continuous output, and adjustable 300kHz–2.5MHz switching frequency (default 500kHz). It delivers up to 95% efficiency in enhanced bias mode and supports pre-biased start-up for infotainment power rails.
For engineers reviewing the AP66300QFVBW-13 datasheet, AP66300QFVBW-13 pinout, AP66300QFVBW-13 application, or AP66300QFVBW-13 equivalent, this device is selected for automotive DC/DC point-of-load conversion where wide VIN, low IQ (43µA typ), thermal robustness (−40°C to +125°C TA), and integrated power stage reduce BOM count and layout complexity.
Technical Context
The AP66300QFVBW-13 employs current-mode control with internal compensation, enabling stable regulation across 0.8V–50V output using a resistive divider on FB (0.8V reference) and supporting PFM/PWM modes via MSYNC. Its dual MOSFET integration eliminates external switch drivers and reduces conduction losses.
It features programmable soft-start (1.7ms internal or external capacitor-based), bias-sourcing capability (BIAS pin >4.5V), and comprehensive protection including hiccup-mode OCP, thermal shutdown (165°C), and ±5% power-good monitoring with 5MΩ internal pull-up. The functional block includes zero-cross detection, valley current limiting, and UVLO hysteresis (50mV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 60V - supports 12V/24V/48V automotive battery systems with transient tolerance up to 72V. |
| Output Current | 3A continuous - sustains full load without derating at +125°C ambient when properly heatsinked. |
| Switching Frequency | 300kHz–2.5MHz (FS-pin programmable); default 500kHz - balances EMI, efficiency, and inductor size. |
| Feedback Reference | 0.800V ±12mV - enables precise output regulation from 0.8V to 50V using standard resistor tolerances. |
| Quiescent Current | 43µA typical - minimizes standby power loss in always-on automotive modules (e.g., telematics, ADAS sensors). |
| Efficiency | Up to 95% at 3A, VOUT=5V, VIN=12V - achieved via low RDS(ON) MOSFETs (120mΩ HS / 55mΩ LS) and bias-assisted VCC regulation. |
| Thermal Rating | AEC-Q100 Grade 1 (−40°C to +125°C TA); TJ max = +150°C - qualified for under-hood and cabin applications. |
Pinout & Package
AP66300QFVBW-13 uses the Green U-QFN4040-16/SWP (Type UXB) package with 0.4mm pitch, 4.0mm × 4.0mm footprint, and exposed thermal pad (EPAD) for enhanced thermal dissipation. PGND pins (8,9) and EPAD must be connected via multiple vias to maximize thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS (1) | Bias supply input | Switches VCC regulator source from VIN to external rail ≥4.5V, reducing die heating in high-VIN operation. |
| VCC (2) | Internal LDO output | Provides 4.8V supply for gate drivers; requires 1µF ceramic bypass to PGND for transient current handling. |
| VIN (3,4) | Main power input | Accepts 3.8–60V; must be bypassed with bulk capacitance near pins to suppress ripple and EMI. |
| BST (5) | Bootstrap supply | Drives high-side MOSFET gate via 0.1µF+ capacitor from SW; critical for proper HS turn-on timing. |
| SW (6,7) | Power switching node | Connects to external LC filter; voltage swings between ~0V and VIN; requires tight layout to minimize ringing. |
| PGND (8,9) | Power ground return | Low-impedance path for high di/dt currents; must be tied directly to EPAD and separated from analog GND. |
| EN (10) | Enable control | Digital input (1.38–1.52V threshold); connect to VIN for automatic startup; 40MΩ input resistance enables simple RC delay. |
| FS (11) | Frequency select | Sets fSW via resistor to GND (300kHz–2.5MHz); tie to VCC for fixed 500kHz operation. |
| MSYNC (12) | Mode/sync control | Configures PFM/PWM mode or accepts external clock (300–2500kHz) for system-level synchronization. |
| PG (13) | Power-good open-drain | Asserts low when VOUT deviates >±5%; internal 5MΩ pull-up eliminates need for external resistor. |
| SS/TR (14) | Soft-start/tracking | Controls ramp rate (1.7ms internal or external cap); enables ratiometric sequencing with other regulators. |
| FB (15) | Feedback input | Senses output via resistive divider; 0.8V reference enables accurate VOUT setting independent of temperature drift. |
| GND (16) | Analog ground reference | Single-point connection to EPAD; separates signal integrity from noisy power ground paths. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with HBM ESD H1C and CDM C3B ratings - meets automotive reliability requirements. |
| Integrated power stage | 120mΩ HS + 55mΩ LS MOSFETs eliminate external switches and drivers, reducing board area by >30% vs discrete solutions. |
| Enhanced bias efficiency mode | BIAS pin sourcing reduces VCC regulator loading at VIN >12V, lowering junction temperature by up to 15°C in 48V systems. |
| Pre-biased output start-up | Enables safe turn-on into pre-charged outputs (e.g., hot-swap rails), preventing reverse current flow and system instability. |
| Programmable soft-start & tracking | External capacitor on SS/TR sets ramp time; identical capacitors enable ratiometric sequencing across multiple rails (e.g., 5V/3.3V). |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powering SoC, display interface, and audio codecs in head units with 12V battery input and strict EMI limits. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 5V/3.3V rails with PFM mode for low-noise standby and PWM for dynamic load response. Use Value: Integrated MOSFETs and 500kHz default frequency minimize filter component size while meeting CISPR-25 Class 5 emission standards. |
Use Scenario: Providing stable 1.8V/3.3V supplies to image sensors and ISP processors in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: Point-of-load converter with pre-biased start-up and thermal protection, ensuring reliable boot during cold cranking (VIN down to 3.8V). Use Value: 95% peak efficiency and 43µA IQ extend battery runtime in always-on vision systems; AEC-Q100 qualification ensures field reliability. |
| Industrial Telematics Gateway | Commercial Vehicle Telematics |
|
Use Scenario: Converting 24V truck battery to 5V for LTE/Wi-Fi modems, GPS receivers, and CAN controllers in fleet management units. IC Role / Device Role / Timing Role: High-input-voltage buck regulator with hiccup-mode OCP and 60V absolute max rating to survive load-dump transients. Use Value: 120mΩ/55mΩ RDS(ON) MOSFETs maintain >90% efficiency at full 3A load across −40°C to +85°C, reducing heatsink requirements. |
Use Scenario: Powering microcontrollers and cellular modems in heavy-duty vehicle telematics boxes exposed to wide temperature swings and vibration. IC Role / Device Role / Timing Role: Automotive-grade DC/DC converter with EN-controlled sequencing and PG status signaling for system-level fault reporting. Use Value: Power-good output with ±5% accuracy and 1.5ms rise delay enables precise power-rail coordination with host MCU reset logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4333-AEC1 (Monolithic Power) | 4A rated, 3.8–60V, fixed 500kHz, no BIAS pin, higher IQ (65µA) | Lacks bias-assisted efficiency mode; less optimal for high-VIN (>24V) thermal management | Choose when higher current headroom is needed and thermal margin is sufficient. |
| TPS54360B-Q1 (TI) | 3.5A rated, 3.5–60V, adjustable 100kHz–2.5MHz, external compensation, no integrated low-side FET | Requires external sync FET and compensation network; larger solution size | Choose when design flexibility (e.g., custom loop tuning or higher VIN transient tolerance) outweighs BOM simplicity. |
Compared with MPQ4333-AEC1 and TPS54360B-Q1, the AP66300QFVBW-13 uniquely combines AEC-Q100 Grade 1 qualification, bias-assisted efficiency, and fully integrated power stage in a 4×4mm QFN - offering the smallest footprint and lowest thermal resistance for 3A automotive buck applications.
Availability
AP66300QFVBW-13 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial telematics requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for AP66300QFVBW-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 company specializing in discrete, analog, and mixed-signal ICs for automotive, industrial, and consumer markets, with IATF 16949-certified manufacturing.
The AP66300Q belongs to Diodes' automotive-grade power management portfolio, designed specifically for robust, high-efficiency DC/DC conversion in harsh environments where reliability, thermal performance, and qualification compliance are mandatory.
FAQ
What is the minimum recommended input capacitance for AP66300QFVBW-13?
The datasheet specifies a minimum 10µF ceramic input capacitor placed close to VIN and PGND pins. For 48V systems or high-ripple environments, a 22µF X7R 100V MLCC in parallel with a 100µF low-ESR tantalum is recommended to suppress transients and ensure stable operation during load dumps.
Can AP66300QFVBW-13 operate with an output voltage below 0.8V?
No. The internal feedback reference is fixed at 0.800V ±12mV, and the device is not designed for sub-0.8V regulation. Output voltages lower than 0.8V cannot be achieved using the standard FB divider configuration and are outside the validated operating range per the datasheet.
How does the BIAS pin improve thermal performance?
When BIAS is connected to a ≥4.5V rail (e.g., VOUT), the internal VCC regulator draws current from BIAS instead of VIN, reducing power dissipation in the high-side driver circuitry. This lowers junction temperature by up to 15°C in 48V applications, improving reliability and enabling higher ambient temperature operation.
Is the EPAD electrically connected to PGND internally?
Yes. The exposed thermal pad (EPAD) is internally connected to PGND and must be soldered to a dedicated PGND copper plane with ≥6 thermal vias (0.3mm diameter) to achieve the specified θJC = 5°C/W and ensure safe 3A operation at +125°C ambient.
AP66300QFVBW-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):
- 60V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 50V
- Current - Output:
- 3A
- Frequency - Switching:
- 300kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- U-QFN4040-16/SWP (Type UXB)
AP66300QFVBW-13 FAQ
1.How can I place an order for AP66300QFVBW-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP66300QFVBW-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 AP66300QFVBW-13 reliable?
The price and inventory of AP66300QFVBW-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP66300QFVBW-13 is usually 5 days.
3.What payment methods are accepted for AP66300QFVBW-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP66300QFVBW-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP66300QFVBW-13?
AP66300QFVBW-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP66300QFVBW-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 AP66300QFVBW-13?
For technical support, including AP66300QFVBW-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP66300QFVBW-13 requirements.
6.How does Aetrix verify that AP66300QFVBW-13 is sourced from the original manufacturer or authorized distributors?
All AP66300QFVBW-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 AP66300QFVBW-13 meets industry standards.
7.What is the process for return or replacement of AP66300QFVBW-13?
All AP66300QFVBW-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP66300QFVBW-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 AP66300QFVBW-13 part is unused and in its original packaging.
Return procedure for AP66300QFVBW-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP66300QFVBW-13 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
