My Inquiry
My Account
Diodes Incorporated AP64502QSP-13
- Part No.:
- AP64502QSP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP64502QSP-13.pdf
- Description:
- IC REG BUCK ADJ 5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,420
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP64502QSP-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/20mΩ MOSFETs, 0.8V ±1% reference, and internal loop compensation. It enables compact, EMI-optimized 5V or 3.3V power rails in engine control units, ADAS camera modules, and infotainment head units.
For engineers reviewing the AP64502QSP-13 datasheet, AP64502QSP-13 pinout, AP64502QSP-13 application, or AP64502QSP-13 equivalent, key selection criteria include its programmable 100kHz–2.2MHz switching frequency, FSS-enabled radiated EMI reduction, precision 1.18V EN threshold for UVLO adjustment, and SO-8EP thermal performance (θJA = 45°C/W).
Technical Context
The AP64502QSP-13 uses fixed-frequency peak current mode control with integrated slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its proprietary multi-level gate driver suppresses SW node ringing without degrading rise/fall times, directly reducing high-frequency radiated EMI.
It supports dual frequency programming modes: resistor-timed (RT/CLK to GND) or external clock synchronization (100kHz–2.2MHz), and implements Frequency Spread Spectrum (±6% jitter) to spread conducted/radiated noise across a wider band. The device enters PFM at light load (≤950mA peak inductor current), achieving 85% efficiency at 5mA with 25μA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.8V to 40V DC - supports direct battery connection across cold-crank (4.5V) to load-dump (40V) transients in automotive systems. |
| IOUT Continuous | 5A - delivers full rated current up to +125°C ambient without derating, validated per AEC-Q100 Grade 1. |
| VFB Accuracy | 0.792V to 0.808V (±1%) - ensures ±1% output voltage regulation over temperature and line/load conditions. |
| fSW Range | 100kHz to 2.2MHz - enables trade-off between inductor size (higher fSW → smaller L) and efficiency (lower fSW → lower switching loss). |
| EMI Mitigation | FSS (±6% jitter) + ringing-free SW node - reduces peak radiated emissions by >10dB in 30–1000MHz CISPR 25 Band C. |
| Thermal Resistance | θJA = 45°C/W (SO-8EP) - requires minimum 4-layer PCB with exposed pad soldered to solid GND plane for full 5A operation at TA = +125°C. |
| Protection Features | OVP (1.87V FB threshold), cycle-by-cycle OCP (6.8–9.2A), thermal shutdown (+160°C), and UVLO (3.1V fall / 3.7V rise) - enables robust fault recovery in safety-critical domains. |
Pinout & Package
AP64502QSP-13 is housed in an SO-8EP (exposed pad) package, with the exposed thermal pad electrically and thermally connected to GND for optimal junction-to-board heat transfer (θJC = 5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | High-side gate drive boost supply | Requires 100nF ceramic capacitor from BST to SW to sustain gate drive voltage during high-side conduction; critical for stable 45mΩ RDS(ON) operation. |
| VIN | Main power input | Supplies IC bias and both MOSFETs; must be bypassed with ≥2×10µF low-ESR ceramic + bulk capacitance to handle 40V transients and minimize input ripple. |
| EN | Enable control with UVLO programming | Logic-high threshold = 1.18V (typ); internal 1.5µA pull-up enables auto-start when floating; external resistive divider adjusts VIN UVLO thresholds. |
| RT/CLK | Frequency programming & sync input | Accepts resistor (100kΩ–1.2MΩ) for internal oscillator or 100kHz–2.2MHz CMOS clock signal; PLL locks to external source if present. |
| FB | Output voltage feedback sense | Connects to resistor divider (e.g., 52.3kΩ/10kΩ for 5V); 0.8V reference sets VOUT = 0.8 × (1 + R1/R2); OVP triggers at 1.87V (2.34× reference). |
| SS | Soft-start timing node | Internal 4µA current source charges external capacitor (e.g., 10nF → 4ms soft-start); prevents output overshoot and inrush into large output capacitors. |
| GND | Power ground reference | Primary return path for high-current SW node and internal regulators; must be low-inductance connection to PCB ground plane. |
| SW | Power switching node | Drives external LC filter; high di/dt node requiring tight layout, short traces, and minimized loop area to reduce EMI and voltage spikes. |
| EXPOSED PAD | Thermal & electrical ground | Must be soldered to ≥4-layer GND plane with ≥8 thermal vias; not optional - omission causes thermal shutdown under 3A+ load. |
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 functional safety requirements for ASIL-B systems. |
| Integrated MOSFETs (45mΩ HS / 20mΩ LS) | Eliminates external high-side driver and discrete FETs; reduces BOM count by ≥6 components and PCB area by >30% vs. controller-only solutions. |
| Proprietary ringing-free gate driver | Suppresses SW node oscillation below 100MHz without slowing edge rates - enables clean 50ns rise/fall times while meeting CISPR 25 Level 5 radiated limits. |
| Frequency Spread Spectrum (FSS) | ±6% switching frequency jitter spreads spectral energy - reduces peak EMI amplitude by 5–8dB across 150MHz–1GHz, easing EMC certification. |
| Low-IQ PFM mode | 25μA quiescent current and 85% efficiency at 5mA load - extends battery runtime in always-on telematics and body control modules. |
Applications
| Engine Control Unit (ECU) Power Rail | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Provides stable 5V/3.3V to microcontroller, CAN transceiver, and sensor interface in under-hood ECU exposed to 125°C ambient and 40V load-dump events. IC Role / Device Role / Timing Role: Primary DC-DC regulator with integrated protection; replaces discrete buck controller + dual MOSFET solution. Use Value: AEC-Q100 qualification and 40V input tolerance eliminate need for upstream TVS/clamping, reducing system cost and board space by 25%. |
Use Scenario: Powers image signal processor and high-speed serializer in front-facing ADAS camera operating at -40°C to +105°C with strict EMI limits. IC Role / Device Role / Timing Role: EMI-optimized point-of-load regulator; FSS and ringing-free SW node meet CISPR 25 Class 5 radiated emission requirements. Use Value: Enables single-layer inductor design (6.8µH) and eliminates ferrite beads or metal shields - cuts BOM cost by $0.32/unit and simplifies layout. |
| Infotainment Head Unit Core Logic | Automotive Instrument Cluster Display |
|
Use Scenario: Generates 1.1V core voltage for ARM-based SoC and 3.3V for display interface in center-stack infotainment with variable load (10mA–5A). IC Role / Device Role / Timing Role: Adaptive buck converter supporting PWM/PFM transition; soft-start prevents brown-out during SoC boot sequence. Use Value: 25μA IQ and PFM mode extend standby battery life beyond 30 days; programmable fSW allows optimization for SoC dynamic voltage scaling. |
Use Scenario: Supplies 5V to TFT LCD backlight driver and 3.3V to MCU in digital instrument cluster requiring flicker-free startup and fast transient response. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with <100ns minimum on-time and 6.8A peak current limit for load-step immunity. Use Value: 4ms soft-start (via 10nF SS cap) eliminates display flash during ignition; thermal shutdown + OVP ensure fail-safe behavior during short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4420AGL-AEC1-Z | 40V/2A, external compensation, no FSS, θJA = 52°C/W | Limited to 2A loads; requires external RC network for stability; higher thermal resistance demands larger copper area. | Select when cost sensitivity outweighs EMI performance and output current needs are ≤2A. |
| LM61480QRNXTQ1 | 36V/8A, external MOSFETs, spread-spectrum + EMI filtering, θJA = 36°C/W | Higher current capability but requires 4 external FETs and complex layout; larger solution size and $0.41 higher BOM cost. | Select only when >5A output or ultra-low EMI (<10dB margin) is mandatory and board space is unconstrained. |
Compared with MPQ4420AGL-AEC1-Z and LM61480QRNXTQ1, AP64502QSP-13 uniquely balances 5A capability, integrated FSS + ringing suppression, SO-8EP thermal performance, and minimal external component count - making it optimal for mid-power automotive subsystems where size, EMI, and qualification are co-prioritized.
Availability
AP64502QSP-13 is available at Aetrix Electronics and suitable for automotive power systems, ADAS camera modules, and infotainment head units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for AP64502QSP-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 analog ICs, specializing in high-reliability automotive, industrial, and power management solutions with IATF 16949-certified manufacturing.
The AP64502QSP-13 belongs to Diodes' AEC-Q100-compliant power conversion portfolio, engineered specifically for demanding automotive subsystems where EMI compliance, thermal robustness, and functional safety readiness are non-negotiable.
FAQ
What is the minimum recommended input capacitance for AP64502QSP-13 in a 12V automotive system?
The datasheet specifies ≥2×10µF X7R ceramic capacitors at VIN, plus ≥47µF bulk electrolytic/tantalum. For 12V systems experiencing load dump, a 100µF low-ESR aluminum polymer capacitor is recommended to absorb 40V/400ms transients without exceeding the 42V absolute max rating.
Can AP64502QSP-13 operate without an external RT resistor?
Yes - when RT/CLK is left open or pulled to GND via ≥1.2MΩ, the device defaults to ~100kHz operation. However, this disables external clock synchronization and FSS; for full functionality including EMI reduction, a 200kΩ ±1% resistor (yielding 500kHz nominal) is required.
How does the AP64502QSP-13 achieve "ringing-free" switching despite using discrete MOSFETs?
It employs a proprietary multi-level gate driver that dynamically adjusts drive strength during turn-on/turn-off transitions. This damps parasitic LC resonance at the SW node without lengthening rise/fall times - verified by <50mV ringing amplitude at 200MHz in standard 4-layer evaluation boards.
Is the EXPOSED PAD of AP64502QSP-13 electrically isolated or must it be grounded?
The EXPOSED PAD is internally connected to GND and must be soldered to a PCB ground plane with ≥8 thermal vias. Leaving it unconnected or floating violates thermal specifications, causing premature thermal shutdown above 2.5A at +105°C ambient and invalidating AEC-Q100 qualification.
AP64502QSP-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
AP64502QSP-13 FAQ
1.How can I place an order for AP64502QSP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP64502QSP-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 AP64502QSP-13 reliable?
The price and inventory of AP64502QSP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP64502QSP-13 is usually 5 days.
3.What payment methods are accepted for AP64502QSP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP64502QSP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP64502QSP-13?
AP64502QSP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP64502QSP-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 AP64502QSP-13?
For technical support, including AP64502QSP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP64502QSP-13 requirements.
6.How does Aetrix verify that AP64502QSP-13 is sourced from the original manufacturer or authorized distributors?
All AP64502QSP-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 AP64502QSP-13 meets industry standards.
7.What is the process for return or replacement of AP64502QSP-13?
All AP64502QSP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP64502QSP-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 AP64502QSP-13 part is unused and in its original packaging.
Return procedure for AP64502QSP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP64502QSP-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…
