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Diodes Incorporated AP64500QSP-13
- Part No.:
- AP64500QSP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP64500QSP-13.pdf
- Description:
- IC REG BUCK ADJ 5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,760
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Product details
Overview
AP64500QSP-13 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering 5A continuous output from a 3.8V–40V input, featuring integrated 45mΩ high-side and 20mΩ low-side MOSFETs, 0.8V ±1% reference voltage, programmable 100kHz–2.2MHz switching frequency, and proprietary EMI-reduction gate driver architecture. It powers infotainment systems, instrument clusters, and ADAS ECUs requiring stable 5V/3.3V rails in harsh automotive environments.
For engineers reviewing the AP64500QSP-13 datasheet, AP64500QSP-13 pinout, AP64500QSP-13 application, or AP64500QSP-13 equivalent, key selection criteria include its AEC-Q100 qualification, SO-8EP thermal performance (θJA = 45°C/W), Frequency Spread Spectrum (±6% jitter), precision enable threshold (1.18V), and cycle-by-cycle current limiting for robust load transient response in 12V/24V vehicle architectures.
Technical Context
The AP64500QSP-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 eliminates switching node ringing while preserving fast rise/fall times, directly reducing high-frequency radiated EMI without efficiency penalty.
It supports dual frequency programming: resistor-timed (RT/CLK to GND) or external clock synchronization (100kHz–2.2MHz), enabling system-level EMI alignment. The device integrates soft-start (4ms), precision UVLO adjustment via EN pin biasing, and PFM operation with 950mA peak inductor current limit and 60mA zero-cross detection for >85% light-load efficiency at 5mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 40V DC - supports full automotive battery range including cold-crank (≥4.5V) and load-dump (≤42V) transients. |
| Output Current | 5A continuous - enables single-chip power supply for multi-rail automotive subsystems without external current boosting. |
| Reference Voltage | 0.800V ±1% - ensures ±1% output regulation accuracy across temperature and line/load conditions for 3.3V/5V rails. |
| Switching Frequency | 100kHz to 2.2MHz - allows optimization of inductor size (e.g., 4.7µH @ 500kHz) or EMI compliance via spread spectrum (±6% jitter). |
| RDS(ON) HS / LS | 45mΩ / 20mΩ - minimizes conduction loss at 5A, enabling >90% efficiency at mid-load (e.g., 12V→5V @ 2A). |
| Quiescent Current | 25µA typical (PFM mode) - extends battery life in always-on modules such as telematics and body control units. |
| Thermal Shutdown | +160°C with +25°C hysteresis - provides fail-safe protection during sustained overload or poor PCB heatsinking. |
Pinout & Package
AP64500QSP-13 is housed in an SO-8EP (exposed pad) package optimized for automotive thermal reliability, with the exposed pad electrically connected to GND and requiring direct PCB ground plane connection for θJA = 45°C/W performance.
| 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 turn-on; critical for stable 100% duty cycle capability. |
| VIN (Pin 2) | Main power input | Accepts 3.8V–40V; must be bypassed with ≥20µF low-ESR capacitor to suppress switching noise and support load dump immunity. |
| EN (Pin 3) | Enable control with UVLO programming | Logic-high threshold = 1.18V; internal 1.5µA pull-up enables auto-start; external resistive divider adjusts VIN UVLO thresholds. |
| RT/CLK (Pin 4) | Frequency programming/synchronization | Connect RT resistor to GND for internal oscillator; apply external clock (100kHz–2.2MHz) for system-level timing alignment and EMI reduction. |
| FB (Pin 5) | Output voltage feedback | Compares resistive divider output against 0.8V reference; sets VOUT = 0.8V × (1 + R1/R2); tolerance directly impacts rail accuracy. |
| COMP (Pin 6) | Loop compensation node | Connects external RC network to stabilize control loop; design determines phase margin and transient response to load steps. |
| GND (Pin 7) | Power ground reference | Primary return path for high-current switching; must be low-inductance connection to minimize noise coupling into FB/COMP. |
| SW (Pin 8) | Power switch node | Drives external inductor; high dv/dt node requiring tight layout; connects to BST capacitor and LC filter input. |
| EXPOSED PAD | Thermal and electrical ground | Must be soldered to ≥4-layer PCB ground plane; sole path for die heat dissipation; omission causes thermal shutdown at <3A. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C ambient operation with HBM ±2kV / CDM ±1kV ESD robustness - meets automotive electronics reliability requirements. |
| Proprietary ringing-free gate driver | Eliminates SW node oscillation without slowing edge rates - reduces radiated EMI peaks by >10dB in 30–100MHz band versus standard buck controllers. |
| Frequency Spread Spectrum (FSS) | ±6% switching frequency jitter spreads energy across bandwidth - lowers peak conducted EMI by up to 15dB and simplifies EMC filter design. |
| Low-dropout (LDO) mode | Enables regulation down to VIN – VOUT ≈ 0.5V - supports high-duty-cycle operation during cold-crank when VIN drops to 6V with 5V output. |
| Cycle-by-cycle overcurrent protection | Monitors high-side current with 6.8A–9.2A trip window - prevents MOSFET failure during short-circuit or startup into heavy capacitive loads. |
Applications
| Automotive Infotainment Power Supply | Instrument Cluster DC-DC Conversion |
|---|---|
|
Use Scenario: Powers SoC, display drivers, and audio codecs in head units with wide input voltage variation (6V–16V) and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5V/3.3V synchronous buck regulator with FSS and ringing-free switching to meet CISPR 25 Class 5 radiated emissions. Use Value: Eliminates need for external EMI filters and ferrite beads, reducing BOM cost and PCB area by >30% versus non-EMI-optimized controllers. |
Use Scenario: Supplies microcontroller, CAN transceivers, and TFT backlight drivers in digital dashboards exposed to engine bay temperatures. IC Role / Device Role / Timing Role: High-efficiency, thermally robust buck converter operating continuously at TA = +105°C with 5A peak load pulses. Use Value: Maintains >88% efficiency at 3A/12V→5V while staying within junction temperature limit (TJ ≤ +150°C) using standard SO-8EP layout. |
| ADAS Camera Module Power | Telematics Control Unit (TCU) Rail Generation |
|
Use Scenario: Provides clean, low-noise 3.3V rail for image sensors and ISP processors in forward-facing cameras requiring minimal switching ripple. IC Role / Device Role / Timing Role: Low-ripple buck regulator with PFM mode (25µA IQ) and soft-start to avoid sensor reset during ignition cycles. Use Value: Achieves <20mVpp output ripple at 5A load and enables >10-year battery-backed operation in parking mode via ultra-low quiescent current. |
Use Scenario: Generates 5V and 3.3V rails for LTE modem, GNSS receiver, and secure MCU in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: AEC-Q100 qualified primary DC-DC with EN-controlled sequencing and OVP to protect sensitive communication ICs. Use Value: Prevents system latch-up during load dump events via integrated OVP and thermal shutdown, eliminating need for external crowbar circuits. |
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-A-Z | 40V/2A, no FSS, no programmable frequency, QFN-11 package | Lacks automotive qualification (only industrial temp), lower current rating limits use in multi-rail systems | Select only for non-automotive 2A applications where EMI is not constrained and cost is prioritized over qualification. |
| TPS54560QDGQRQ1 | 60V/5A, external MOSFETs required, no integrated low-side FET, SOIC-8 package | Higher VIN max but requires 2 external MOSFETs and gate drivers - increases layout complexity and BOM count | Choose when input exceeds 40V (e.g., 48V hybrid systems) and board space allows discrete FET placement with thermal management. |
Compared with MPQ4420AGL-A-Z and TPS54560QDGQRQ1, the AP64500QSP-13 uniquely combines AEC-Q100 Grade 1 qualification, fully integrated 5A power stage, SO-8EP thermal performance, and dual EMI mitigation (ringing-free driver + FSS) in a single compact package - making it optimal for cost-sensitive, space-constrained automotive modules requiring zero external power switches.
Availability
AP64500QSP-13 is available at Aetrix Electronics and suitable for automotive infotainment systems, instrument clusters, and ADAS camera modules requiring stable component supply under IATF 16949 production controls.
Supply support for AP64500QSP-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 solutions for automotive, industrial, and consumer markets, with manufacturing certified to IATF 16949 and AEC-Q100 standards.
The AP64500QSP-13 belongs to Diodes' automotive-grade power management product line, engineered specifically for high-reliability DC-DC conversion in 12V/24V vehicle networks - emphasizing EMI robustness, thermal resilience, and functional safety readiness.
FAQ
What is the minimum input voltage required for AP64500QSP-13 to start switching?
The AP64500QSP-13 has a power-on reset (POR) threshold of 3.5V–3.7V (rising). Below 3.5V, the device remains in shutdown with 1μA ISHDN. At VIN ≥3.5V, internal LDO powers up control circuitry, and if EN ≥1.18V, soft-start initiates. This ensures reliable startup during automotive cold-crank events where battery voltage may dip to 6V but never below 3.8V nominal operation range.
How does the AP64500QSP-13 achieve EMI reduction without sacrificing efficiency?
It uses two independent mechanisms: a proprietary multi-level gate driver that damps SW node ringing while maintaining fast MOSFET edge rates (preserving <100ns turn-on/off), and Frequency Spread Spectrum with ±6% jitter that disperses spectral energy - both verified in CISPR 25 testing to reduce peak radiated emissions by >10dB without increasing conduction losses or thermal stress.
Can AP64500QSP-13 operate in dropout mode, and what is the minimum VIN–VOUT differential?
Yes - it supports low-dropout (LDO) mode when duty cycle approaches 100%. With RDS(ON)HS = 45mΩ and 5A load, minimum VIN–VOUT = IOUT × RDS(ON)HS ≈ 225mV, enabling regulation down to VIN = VOUT + 0.25V. This allows stable 5V output even when VIN sags to 5.25V during cranking, avoiding brownout resets in critical ECUs.
What is the recommended PCB layout practice for the EXPOSED PAD on AP64500QSP-13?
The exposed pad must be soldered to a solid, unbroken 4-layer PCB ground plane with ≥4 thermal vias (0.3mm diameter, spaced ≤2mm apart) connecting directly to inner ground layers. Pad area must match datasheet mechanical drawing (SO-8EP), and no signal traces or split planes may intersect beneath the pad - violating this causes thermal shutdown at <3A due to θJA degradation from 45°C/W to >80°C/W.
AP64500QSP-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:
- 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
AP64500QSP-13 FAQ
1.How can I place an order for AP64500QSP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP64500QSP-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 AP64500QSP-13 reliable?
The price and inventory of AP64500QSP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP64500QSP-13 is usually 5 days.
3.What payment methods are accepted for AP64500QSP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP64500QSP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP64500QSP-13?
AP64500QSP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP64500QSP-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 AP64500QSP-13?
For technical support, including AP64500QSP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP64500QSP-13 requirements.
6.How does Aetrix verify that AP64500QSP-13 is sourced from the original manufacturer or authorized distributors?
All AP64500QSP-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 AP64500QSP-13 meets industry standards.
7.What is the process for return or replacement of AP64500QSP-13?
All AP64500QSP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP64500QSP-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 AP64500QSP-13 part is unused and in its original packaging.
Return procedure for AP64500QSP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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