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Diodes Incorporated AP64352QSP-13
- Part No.:
- AP64352QSP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP64352QSP-13.pdf
- Description:
- IC REG BUCK ADJ 3.5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,298
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Product details
Overview
AP64352QSP-13 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive synchronous buck converter with 3.8V–40V input, 3.5A continuous output, integrated 75mΩ/45mΩ MOSFETs, and internal loop compensation. It delivers regulated 5V/3.3V outputs for infotainment and instrument cluster power rails with ±1% feedback accuracy and 22μA quiescent current in PFM mode.
For engineers reviewing the AP64352QSP-13 datasheet, AP64352QSP-13 pinout, AP64352QSP-13 application, or AP64352QSP-13 equivalent, key selection criteria include EMI-reduction features (FSS ±6% jitter, ringing-free gate drive), programmable soft-start, precision enable threshold (1.18V), and thermal shutdown at +160°C - all validated for automotive-grade reliability across –40°C to +125°C ambient.
Technical Context
The AP64352QSP-13 employs fixed-frequency peak current mode control with integrated slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its proprietary multi-level gate driver maintains fast MOSFET switching edges while eliminating SW node ringing - directly reducing high-frequency radiated EMI without efficiency penalty.
It supports dual frequency programming: resistor-timed (100kHz–2.2MHz via RT/CLK-to-GND) or external clock synchronization (100kHz–2.2MHz), enabling layout-optimized noise management. The device transitions seamlessly between forced PWM (heavy load) and PFM (light load), achieving up to 85% efficiency at 5mA with zero-cross detection disabling low-side conduction during discontinuous conduction mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 40V DC - supports direct connection to 12V/24V automotive battery rails with cold-crank margin down to 3.8V. |
| Output Current | 3.5A continuous - sustains full load under worst-case thermal conditions (θJA = 45°C/W, SO-8EP package). |
| Feedback Voltage | 0.800V ±1% - enables precise output regulation (e.g., 5.00V ±50mV with 115kΩ/22.1kΩ divider) across temperature. |
| Quiescent Current | 22μA typical in PFM no-load - minimizes standby power draw in always-on vehicle modules. |
| Switching Frequency | Programmable 100kHz–2.2MHz - allows trade-off between inductor size (higher fSW → smaller L) and conduction loss (lower fSW → higher efficiency at mid-load). |
| EMI Reduction | FSS ±6% jitter + ringing-free gate drive - reduces peak conducted/radiated emissions without external snubbers or shielding. |
| Thermal Shutdown | +160°C with +25°C hysteresis - protects die during sustained overload or poor PCB thermal design while allowing recovery after cooling. |
Pinout & Package
AP64352QSP-13 is housed in an SO-8EP (exposed pad) thermally enhanced package with 9 terminals (8 leads + exposed thermal pad). The exposed pad must be soldered to a PCB ground plane for optimal thermal performance (θJC = 5°C/W) and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | High-side gate drive boost supply | Requires 100nF ceramic capacitor to SW to sustain gate voltage for 75mΩ high-side MOSFET during 100% duty cycle. |
| VIN | Main power input | Accepts 3.8V–40V; must be bypassed with ≥2×10μF low-ESR capacitors near IC to suppress switching transients. |
| EN | Enable control with UVLO programming | Logic-high threshold = 1.18V; internal 1.5μA pull-up enables auto-start when floating; external resistive divider adjusts VIN UVLO. |
| RT/CLK | Frequency programming/synchronization | Connect resistor to GND for internal oscillator; accept external clock 100kHz–2.2MHz - PLL locks and recovers automatically if clock stops. |
| FB | Output voltage feedback sensing | Compares divided output against 0.8V reference; error amplifier drives COMP node to regulate average inductor current. |
| SS | Soft-start timing control | 4μA internal current charges external capacitor (e.g., 10nF → 2ms soft-start) to limit inrush current and output overshoot. |
| GND | Power ground reference | Common return for VIN, SW, BST, FB, SS, EN, RT/CLK; must connect to exposed pad for low-impedance path. |
| SW | Switching node output | Drives external LC filter; connects to inductor input; voltage swings from GND to VIN during operation. |
| EXPOSED PAD | Thermal and electrical ground | Must be soldered to ≥4-layer PCB ground plane; provides primary heat dissipation path and reduces EMI coupling. |
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 change control and PPAP requirements. |
| Integrated MOSFETs | 75mΩ high-side + 45mΩ low-side RDS(ON) - eliminates external FETs and drivers, reducing BOM count and layout area while maintaining >90% efficiency at 1A. |
| Internal loop compensation | No external compensation components required - simplifies design validation and eliminates tuning errors in production. |
| Low-dropout (LDO) mode | Maintains regulation during ultra-low duty cycles (e.g., VOUT = 3.3V from 4.2V VIN) by extending minimum on-time control. |
| Cycle-by-cycle OCP | 4.2A–6.5A programmable peak current limit - protects against short-circuit and overload without latch-up, supporting auto-recovery. |
Applications
| Automotive Infotainment Power Supply | Instrument Cluster Core Rail |
|---|---|
Use Scenario: Powering SoC, display drivers, and audio codecs in head units with wide battery voltage swing (6V–16V) and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5V/3.3V synchronous buck regulator delivering stable core voltage with <50mV ripple under dynamic load steps. Use Value: FSS ±6% jitter and ringing-free SW node meet CISPR 25 Class 5 radiated emissions without added filtering - reducing system cost and board space. | Use Scenario: Generating 5V rail for microcontroller, CAN transceivers, and TFT backlight drivers in digital dashboards. IC Role / Device Role / Timing Role: High-reliability DC-DC converter operating continuously at –40°C to +125°C ambient with guaranteed startup at 3.8V cold-crank. Use Value: 22μA PFM quiescent current extends battery life during vehicle sleep mode; AEC-Q100 qualification ensures long-term field reliability. |
| Telematics Control Unit (TCU) Input Stage | ADAS Camera Module Power |
Use Scenario: Stepping down 12V/24V vehicle bus to 5V for LTE modem, GNSS receiver, and MCU in connected vehicle gateways. IC Role / Device Role / Timing Role: Input-stage buck converter with programmable soft-start (2ms typical) to coordinate power sequencing with baseband processor. Use Value: Precision EN threshold (1.18V) and external UVLO resistor network enable controlled power-up during battery voltage ramp - preventing brown-out resets. | Use Scenario: Providing clean, low-noise 3.3V supply to image sensor and ISP in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: EMI-optimized regulator minimizing switching noise coupling into analog video signal paths. Use Value: Proprietary gate driver eliminates SW node ringing that would otherwise modulate sensor pixel clocks - preserving image SNR. |
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-P | 40V/2A, 200kHz–2.5MHz fSW, no FSS, requires external compensation | Lacks automotive qualification and EMI-specific features; lower current rating limits use in high-power infotainment. | Select only for non-automotive industrial applications where EMI is less constrained and 2A output suffices. |
| TPS54340QDGQRQ1 | 40V/3.5A, 100kHz–2.5MHz, no integrated FSS or ringing suppression, external compensation required | Higher IQ (145μA vs. 22μA) increases standby power; lacks proprietary gate drive for SW node control. | Prefer when TI ecosystem support (WEBENCH, reference designs) outweighs EMI and quiescent current advantages of AP64352QSP-13. |
Compared with MPQ4420AGL-A-P and TPS54340QDGQRQ1, the AP64352QSP-13 uniquely combines AEC-Q100 Grade 1 compliance, integrated EMI reduction (FSS + ringing-free drive), internal compensation, and 22μA PFM IQ - making it the only option qualified for demanding automotive power rails requiring both low standby power and certified EMC performance.
Availability
AP64352QSP-13 is available at Aetrix Electronics and suitable for automotive infotainment systems, instrument clusters, and telematics control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AP64352QSP-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, computing, and consumer markets.
The AP64352QSP-13 belongs to Diodes' automotive-qualified power management portfolio, designed specifically for high-reliability DC-DC conversion in 12V/24V vehicle subsystems where EMI, thermal robustness, and AEC-Q100 compliance are mandatory.
FAQ
What is the minimum input voltage required for reliable startup?
The AP64352QSP-13 has a nominal VIN undervoltage lockout (UVLO) rising threshold of 3.7V and falling threshold of 3.1V. Reliable startup occurs when VIN exceeds 3.7V, accommodating automotive cold-crank events down to 3.8V. The EN pin's 1.18V logic-high threshold allows external resistor networks to raise the effective UVLO point for systems requiring higher turn-on voltage.
How does the Frequency Spread Spectrum (FSS) function impact EMC testing?
FSS introduces ±6% switching frequency jitter, spreading energy across a 12% bandwidth instead of concentrating it at a single fundamental and harmonics. This reduces peak radiated emissions by 5–10dB in CISPR 25 narrowband scans, often eliminating the need for ferrite beads or shielded inductors in pre-compliance testing - verified in Diodes' application note AN-42747.
Can the AP64352QSP-13 operate with a 2.2MHz switching frequency?
Yes - the AP64352QSP-13 supports 100kHz to 2.2MHz via RT/CLK pin configuration. At 2.2MHz, use a 47kΩ ±1% resistor from RT/CLK to GND (per DS42747 Figure 11). Ensure external components (inductor DCR, capacitor ESR) are rated for high-frequency operation to maintain efficiency and thermal performance.
What thermal derating applies when using the SO-8EP package on a 2-layer PCB?
On a standard 2-layer FR-4 board without thermal vias or copper pour, θJA degrades from the datasheet's 45°C/W (4-layer, 2oz Cu) to ~75°C/W. At 3.5A output and 12V input, junction temperature rise exceeds safe limits; reduce load to ≤2.2A or implement ≥6 thermal vias under the exposed pad connected to inner ground planes to restore full-rated current capability.
AP64352QSP-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
AP64352QSP-13 FAQ
1.How can I place an order for AP64352QSP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP64352QSP-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 AP64352QSP-13 reliable?
The price and inventory of AP64352QSP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP64352QSP-13 is usually 5 days.
3.What payment methods are accepted for AP64352QSP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP64352QSP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP64352QSP-13?
AP64352QSP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP64352QSP-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 AP64352QSP-13?
For technical support, including AP64352QSP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP64352QSP-13 requirements.
6.How does Aetrix verify that AP64352QSP-13 is sourced from the original manufacturer or authorized distributors?
All AP64352QSP-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 AP64352QSP-13 meets industry standards.
7.What is the process for return or replacement of AP64352QSP-13?
All AP64352QSP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP64352QSP-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 AP64352QSP-13 part is unused and in its original packaging.
Return procedure for AP64352QSP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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