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Diodes Incorporated AP64350QSP-13
- Part No.:
- AP64350QSP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP64350QSP-13.pdf
- Description:
- IC REG BUCK ADJ 3.5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,241
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Product details
Overview
AP64350QSP-13 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering 3.5A continuous output from 3.8V–40V input, featuring integrated 75mΩ high-side and 45mΩ low-side MOSFETs, 0.8V ±1% reference, and programmable 100kHz–2.2MHz switching frequency. It targets 12V/24V automotive power rails for infotainment, instrument clusters, and ADAS.
For engineers reviewing the AP64350QSP-13 datasheet, AP64350QSP-13 pinout, AP64350QSP-13 application, or AP64350QSP-13 equivalent, key selection criteria include EMI-reduction features (FSS ±6% jitter, ringing-free gate drive), precision enable threshold (1.18V), thermal shutdown at +160°C, and SO-8EP package compatibility with automotive PCB layout constraints.
Technical Context
The AP64350QSP-13 employs fixed-frequency peak current mode control with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its proprietary multi-level gate driver maintains fast MOSFET turn-on/turn-off slew rates while eliminating SW node ringing-critical for CISPR 25 Class 5 compliance.
Frequency Spread Spectrum (FSS) modulates switching frequency by ±6% to disperse radiated energy across a wider band, reducing peak EMI emissions. External clock synchronization (100kHz–2.2MHz) and resistor-programmable timing (RT pin) support system-level noise coordination and compact filter design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 40V DC - supports direct connection to automotive battery rails including cold-crank (4.5V) and load-dump (42V transient) conditions. |
| Output Current | 3.5A continuous - sustains full load at TA = +125°C in SO-8EP package with proper PCB copper area and thermal pad grounding. |
| Feedback Voltage | 0.800V ±1% - enables precise output regulation (e.g., 5.0V ±25mV using 115kΩ/22.1kΩ divider) across temperature and line/load variations. |
| Quiescent Current | 22μA typical in PFM mode - extends battery runtime in always-on automotive modules (e.g., telematics wake-up circuits). |
| Switching Frequency | Programmable 100kHz–2.2MHz - allows trade-off between inductor size (higher fSW → smaller L) and efficiency (lower fSW → lower switching loss). |
| Thermal Shutdown | +160°C with +25°C hysteresis - protects die during sustained overload or poor heatsinking; automatic recovery after cooldown. |
| EMI Features | FSS ±6% jitter + ringing-free gate drive - reduces peak radiated emissions without external snubbers or ferrite beads. |
Pinout & Package
AP64350QSP-13 is housed in an SO-8EP (exposed pad) package optimized for automotive thermal and EMI performance. The exposed thermal pad (Pin 9) must be soldered to a solid GND plane for junction-to-ambient θJA = 45°C/W and reliable operation at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | High-side gate drive bootstrap supply | Requires 100nF ceramic capacitor to SW to sustain high-side MOSFET conduction during duty cycles >50%. |
| VIN (Pin 2) | Main power input | Accepts 3.8V–40V; requires local bulk capacitance (≥2×10µF) to suppress switching transients and meet CISPR 25 conducted emission limits. |
| EN (Pin 3) | Enable control with UVLO programming | Logic-high threshold = 1.18V; internal 1.5µA pull-up enables auto-start; external resistor divider adjusts VIN UVLO thresholds. |
| RT/CLK (Pin 4) | Frequency programming/synchronization | Connect RT resistor to GND for internal oscillator; apply external 100kHz–2.2MHz clock for system-level timing alignment. |
| FB (Pin 5) | Output voltage feedback sensing | Compares resistive divider output against 0.8V reference; sets VOUT = 0.8V × (1 + R1/R2) with <±1% accuracy over temp. |
| COMP (Pin 6) | Loop compensation node | Connect RC network (e.g., 14kΩ + 3.3nF) to stabilize control loop; critical for transient response in ADAS camera power rails. |
| GND (Pin 7) | Power ground reference | Return path for VIN, SW, BST, EN, RT/CLK, FB, COMP; must tie directly to exposed pad for low-inductance return. |
| SW (Pin 8) | Power switch node | Drives external LC filter; high di/dt node requiring tight layout, short traces, and ground stitching vias to minimize EMI. |
| EXPOSED PAD (Pin 9) | Thermal and electrical ground | Must be soldered to ≥4 cm² internal/external GND plane; failure to connect causes thermal shutdown or parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C ambient operation with HBM ±2kV / CDM ±500V ESD robustness-meets automotive electronics reliability requirements. |
| Integrated 75mΩ/45mΩ MOSFETs | Eliminates external power switches and associated gate drivers; reduces BOM count and layout area while maintaining >85% efficiency at 5mA light load. |
| Proprietary ringing-free gate driver | Suppresses SW node oscillation without slowing edge rates-enables clean 100MHz+ spectral content for EMC testing without added snubbers. |
| Frequency Spread Spectrum (FSS) | ±6% frequency jitter spreads EMI energy across ~120kHz bandwidth at 2MHz fSW-reduces peak radiated emissions by up to 10dB per CISPR 25 measurements. |
| Precision enable threshold (1.18V) | Allows accurate sequencing of multiple rails via resistor-divider UVLO programming-critical for microcontroller boot order in instrument clusters. |
| Low-dropout (LDO) mode | Maintains regulation when VIN drops near VOUT (e.g., 5.5V input for 5V output), preventing brownout during automotive cranking events. |
Applications
| Automotive Infotainment Power Supply | Instrument Cluster Core Rail |
|---|---|
|
Use Scenario: Powers SoC, display controller, and audio codec in head-unit systems operating from 12V battery with load-dump transients. IC Role / Device Role / Timing Role: Primary 5V/3.3V step-down regulator with programmable fSW to avoid AM radio band interference (530–1710kHz). Use Value: FSS and ringing-free SW node ensure CISPR 25 Class 5 radiated emissions compliance without shielding or additional filters. |
Use Scenario: Supplies MCU, CAN transceiver, and TFT backlight driver in digital dashboards requiring stable voltage during cold-crank (-40°C startup). IC Role / Device Role / Timing Role: High-efficiency buck converter with 22μA quiescent current enabling always-on monitoring during vehicle sleep mode. Use Value: AEC-Q100 Grade 1 rating and thermal shutdown guarantee uninterrupted operation across full automotive temperature range. |
| ADAS Camera Module Power | Telematics Control Unit (TCU) Input Stage |
|
Use Scenario: Generates clean 1.2V/1.8V core supplies for image signal processors in forward-facing cameras with strict EMI limits. IC Role / Device Role / Timing Role: Synchronous buck with low-output-ripple design and soft-start to prevent image sensor reset during power-up. Use Value: 0.8V ±1% reference and external loop compensation enable <±10mV output regulation under dynamic imaging loads. |
Use Scenario: Steps down 12V vehicle power to 5V for LTE modem, GNSS receiver, and eSIM subsystems in connected car platforms. IC Role / Device Role / Timing Role: Input-stage regulator with wide VIN range handling battery fluctuations during engine start-stop cycles. Use Value: LDO mode sustains 5V output down to VIN = 5.5V, preventing TCU brownout during 6V cranking events. |
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 | Higher 4A output, 2.5MHz max fSW, but no FSS; requires external compensation. | Lacks integrated EMI reduction features-requires additional filtering for CISPR 25 Class 5. | Choose when higher current headroom is needed and board space allows external compensation components. |
| TPS543B20QRGZTQ1 | 3.5A, 2.2MHz, integrated FSS, but larger 16-pin QFN package and higher IQ (45μA). | Greater thermal margin at high ambient but consumes more PCB area and increases standby power. | Prefer when system-level thermal management is constrained and footprint is not limiting. |
Compared with MPQ4333-AEC1 and TPS543B20QRGZTQ1, AP64350QSP-13 delivers best-in-class EMI performance in minimal SO-8EP footprint with lowest quiescent current-ideal for space-constrained, always-on automotive modules where radiated emissions and battery drain are critical.
Availability
AP64350QSP-13 is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and ADAS applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for AP64350QSP-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 manufacturer of discrete semiconductors and ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.
The AP64350QSP-13 belongs to Diodes' automotive-grade power conversion portfolio, designed specifically to meet stringent AEC-Q100 requirements and simplify EMI-compliant DC-DC design in 12V/24V vehicle architectures.
FAQ
What is the minimum input voltage required for AP64350QSP-13 to start switching?
The AP64350QSP-13 has a power-on reset (POR) threshold of 3.5V (typical) and undervoltage lockout (UVLO) falling threshold of 3.1V. It begins switching once VIN rises above 3.5V and remains active until VIN falls below 3.1V. The EN pin can be used to adjust these thresholds via external resistor dividers.
Can AP64350QSP-13 operate in forced PWM mode at all load levels?
No. AP64350QSP-13 defaults to forced PWM under heavy load but automatically transitions to PFM mode below ~100mA to reduce quiescent current to 22μA. Forced PWM is not user-selectable; the device uses valley-current detection and zero-cross sensing to determine mode automatically.
How is the exposed thermal pad on the SO-8EP package connected electrically?
The exposed pad (Pin 9) is internally connected to GND and must be soldered to a dedicated PCB ground plane with ≥4 thermal vias (0.3mm diameter) to achieve θJA = 45°C/W. It is not isolated and must not be left floating or connected to any other net.
Does AP64350QSP-13 support output overvoltage protection (OVP)?
Yes. AP64350QSP-13 includes internal OVP that triggers when output exceeds target by 5%. Upon detection, the high-side MOSFET turns off and low-side MOSFET turns on to clamp the output, preventing damage to downstream 3.3V/5V logic circuits during load-dump or transient events.
AP64350QSP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) 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):
- 0.8V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 100kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP64350QSP-13 FAQ
1.How can I place an order for AP64350QSP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP64350QSP-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 AP64350QSP-13 reliable?
The price and inventory of AP64350QSP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP64350QSP-13 is usually 5 days.
3.What payment methods are accepted for AP64350QSP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP64350QSP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP64350QSP-13?
AP64350QSP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP64350QSP-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 AP64350QSP-13?
For technical support, including AP64350QSP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP64350QSP-13 requirements.
6.How does Aetrix verify that AP64350QSP-13 is sourced from the original manufacturer or authorized distributors?
All AP64350QSP-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 AP64350QSP-13 meets industry standards.
7.What is the process for return or replacement of AP64350QSP-13?
All AP64350QSP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP64350QSP-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 AP64350QSP-13 part is unused and in its original packaging.
Return procedure for AP64350QSP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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