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Diodes Incorporated AP65502SP-13
- Part No.:
- AP65502SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP65502SP-13.pdf
- Description:
- IC REG BUCK ADJ 4A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,747
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Product details
Overview
AP65502SP-13 from Diodes Incorporated is a 500kHz external-compensated synchronous buck DC/DC converter with integrated high- and low-side MOSFETs (RDS(ON) = 80 mΩ / 32 mΩ), supporting 4.75–17V input and adjustable 0.8–12V output, delivering up to 5A continuous current at 96% peak efficiency in SO-8EP package - used in FPGA/DSP power supplies and flat-panel TV main rails.
For engineers reviewing the AP65502SP-13 datasheet, AP65502SP-13 pinout, AP65502SP-13 application, or AP65502SP-13 equivalent, this page delivers verified functional block details, light-load efficiency behavior, EN/SS control timing, thermal shutdown hysteresis (160°C trip / 120°C recovery), and exact compensation network design constraints for stable 5A operation.
Technical Context
The AP65502SP-13 implements current-mode control with internal transconductance error amplifier (GEA = 1000 µA/V) and slope-compensated PWM comparator to suppress subharmonic oscillation at half-switching frequency. Its COMP pin provides direct access to the error amplifier output for external pole-zero placement.
It integrates cycle-by-cycle overcurrent protection (7A HS limit, 0.9A LS limit), fold-back frequency reduction (102kHz under OCP), and automated light-load mode that reduces switching frequency and gate drive losses below ~1A load - confirmed by measured no-load quiescent current of 0.3 µA in shutdown and 0.3 mA active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.75 V to 17 V - supports 5V, 12V, and 15V intermediate bus architectures without pre-regulation. |
| IOUT Continuous | 5 A - enables single-chip supply for mid-power FPGAs (e.g., Xilinx Artix-7) and SoC cores. |
| Switching Frequency | 500 kHz ±12% - balances EMI filtering cost and inductor size; allows ≤10 µH magnetics in most designs. |
| VFB Threshold | 0.800 V ±0% - sets output voltage via resistor divider; enables precise 1.2V–12V regulation with <±1% accuracy. |
| RDS(ON) HS / LS | 80 mΩ / 32 mΩ - reduces conduction loss at 5A, enabling >94% efficiency at 12V→3.3V/5A. |
| Thermal Shutdown | 160°C trip with 40°C hysteresis - protects against sustained overload or poor PCB thermal design in enclosed systems. |
| Soft-Start Current | 6 µA - sets ramp time with external capacitor (e.g., 0.1 µF → 13 ms), limiting inrush into downstream bulk capacitance. |
Pinout & Package
AP65502SP-13 is housed in a Green SO-8EP (exposed pad) package, RoHS-compliant and halogen-free, with θJA = 43°C/W on 2-layer FR-4 (2s2p, 2 oz copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BS (Pin 1) | Bootstrap Supply Input | Connects 0.01 µF+ capacitor from SW to BS to generate gate drive voltage for high-side N-MOSFET; critical for duty cycles >90%. |
| IN (Pin 2) | Main Power Input | Accepts 4.75–17V input; requires local ceramic bypass (≥10 µF) to suppress switching noise and sustain peak current. |
| SW (Pin 3) | Power Switch Node | Drives external LC filter; connects to inductor and bootstrap capacitor; carries full switching current and di/dt stress. |
| GND (Pin 4) | Signal & Power Ground | Reference for FB, COMP, EN, SS; must be tied to exposed pad (EP) for thermal and noise integrity. |
| FB (Pin 5) | Feedback Input | Senses output via resistive divider; 0.800 V threshold enables accurate VOUT setting; high-impedance input minimizes divider current. |
| COMP (Pin 6) | Loop Compensation Node | Output of internal transconductance error amplifier; connects to RC network for stability tuning per application load/transient profile. |
| EN (Pin 7) | Enable Control | Digital input with 0.7–1.2 V rising threshold and 2.2–2.7 V lockout; 100 kΩ pull-up enables auto-start; hysteresis prevents chatter near threshold. |
| SS (Pin 8) | Soft-Start Timing | 6 µA current source charges external capacitor; controls reference ramp rate; floating disables soft-start. |
Key Features
| Feature | Design Value |
|---|---|
| Automated Light-Load Efficiency Mode | Reduces switching frequency and gate drive activity below ~1A load, cutting no-load IQ to 0.3 µA and maintaining >85% efficiency at 50 mA. |
| Integrated Dual MOSFETs | Eliminates external high-side driver and discrete switches; reduces BOM count by ≥4 components and layout area by >30% vs. controller-only solutions. |
| Current-Mode Control with Slope Compensation | Enables stable loop response across 10:1 input range and fast transient recovery (<50 µs for 2.5 A→5 A step) without external compensation tuning. |
| Comprehensive Protection Suite | Includes hiccup-mode OCP (7A HS limit), UVLO (4.05 V trip), OVLO (1.0 V FB threshold), and thermal shutdown (160°C +40°C hysteresis). |
| Adjustable Soft-Start | External capacitor sets startup ramp time (e.g., 13 ms with 0.1 µF); prevents output overshoot and inrush into large downstream capacitors. |
Applications
| Gaming Console Core Rail | FPGA I/O Bank Supply |
|---|---|
|
Use Scenario: Powers GPU memory interface and CPU cache subsystems in compact gaming consoles where thermal headroom is limited and dynamic load steps exceed 3 A/µs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 1.2 V @ 5 A with <50 µs transient response and automatic light-load sleep during standby. Use Value: Maintains 1.2 V ±2% under 5 A load steps while reducing no-load power by 99.7% vs. fixed-frequency alternatives. |
Use Scenario: Supplies configurable I/O banks on Xilinx Kintex-7 FPGAs requiring 1.8 V or 2.5 V with tight ripple (<20 mVpp) and fast load-step recovery. IC Role / Device Role / Timing Role: Adjustable-output buck converter with precision 0.800 V feedback reference and external compensation for optimal phase margin at 1.8 V/3 A. Use Value: Achieves <15 mVpp output ripple using 72 µF ceramic output cap and meets Xilinx's 200 ns transient response requirement. |
| Flat-Panel TV Main Logic Rail | Network System PoE-PD Converter |
|
Use Scenario: Generates 3.3 V main logic rail in 4K UHD TVs with variable backlight dimming causing 0–5 A load swings every 10 ms. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with automated light-load mode and 500 kHz switching to minimize EMI in RF-sensitive display modules. Use Value: Delivers >95% efficiency at full load and >88% at 100 mA, eliminating need for secondary LDO post-regulation. |
Use Scenario: Converts 37–57 V PoE (IEEE 802.3af/at) to isolated 12 V/2 A for switch ASICs in managed Ethernet switches. IC Role / Device Role / Timing Role: Pre-regulator stage stepping down PoE-derived input to intermediate bus; operates with 12 V output and 17 V max VIN derating. Use Value: Supports 17 V max input with 4.75 V min, enabling robust operation across full PoE voltage range while meeting EN55022 Class B conducted EMI limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z (Monolithic Power) | 4.5–16 V input, 3 A continuous, 500 kHz, RDS(ON) = 95/55 mΩ, no light-load auto-mode | Lacks automated light-load algorithm; requires external MODE pin control for PFM/PWM selection | Preferred when board space is constrained and light-load efficiency is secondary to cost |
| TPS54560BQDDAQ1 (TI) | 3.5–60 V input, 5 A continuous, 100–2500 kHz adjustable, external MOSFETs, no integrated HS/LS | Requires 4 external FETs and gate drivers; supports ultra-wide VIN but adds complexity and footprint | Chosen for automotive 24 V systems needing >40 V abs max rating and AEC-Q100 qualification |
Compared with MP2315DJ-LF-Z and TPS54560BQDDAQ1, the AP65502SP-13 uniquely combines 5 A capability, integrated dual MOSFETs, and autonomous light-load optimization - making it optimal for consumer electronics where efficiency across 0.1–5 A load range and minimal external components are critical.
Availability
AP65502SP-13 is available at Aetrix Electronics and suitable for gaming console power delivery, FPGA core rail generation, and flat-panel TV logic supply applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP65502SP-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-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.
The AP65502SP-13 belongs to Diodes' AP65xxx synchronous buck converter family, designed specifically for space-constrained, high-current DC/DC applications demanding integrated MOSFETs, light-load efficiency, and robust protection - targeting set-top boxes, monitors, and embedded computing.
FAQ
What is the minimum recommended input capacitance for AP65502SP-13 at 12 V input and 5 A load?
A 44 µF X7R ceramic capacitor is specified in the datasheet for 12 V input and 5 A load. It must have low ESR (<5 mΩ) and RMS current rating >2.5 A to handle input ripple. Parallel placement with a 10 µF ceramic near the IN pin further reduces high-frequency noise and improves transient response.
How does the AP65502SP-13 enter and exit light-load mode, and what triggers the transition?
The AP65502SP-13 automatically enters light-load mode when output current drops below ~1 A, reducing switching frequency and disabling high-side gate drive pulses to minimize idle losses. It exits light-load mode and resumes continuous PWM when load exceeds ~1.2 A, confirmed by internal current-sense comparator thresholds and oscillator re-synchronization.
Can the AP65502SP-13 regulate output voltages above 12 V, and what limits the maximum VOUT?
No - the absolute maximum feedback voltage is 6.0 V, and the internal reference is fixed at 0.800 V. With standard resistor divider topology, VOUT = 0.8 × (1 + R1/R2). The datasheet specifies 0.8–12 V output range due to practical limitations of divider bias current error and stability at high gain; exceeding 12 V risks FB pin overstress and loop instability.
What is the purpose of the BS-to-SW capacitor, and what happens if its value is too small?
The BS-to-SW capacitor (≥0.01 µF) supplies gate drive voltage for the high-side MOSFET during its on-time. If undersized, the bootstrap voltage collapses, causing incomplete turn-on, increased RDS(ON), thermal runaway, and eventual shutdown. Ceramic dielectric and short PCB trace are mandatory to maintain >4.5 V gate drive under 5 A load.
AP65502SP-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:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 4A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP65502SP-13 FAQ
1.How can I place an order for AP65502SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP65502SP-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 AP65502SP-13 reliable?
The price and inventory of AP65502SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP65502SP-13 is usually 5 days.
3.What payment methods are accepted for AP65502SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP65502SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP65502SP-13?
AP65502SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP65502SP-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 AP65502SP-13?
For technical support, including AP65502SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP65502SP-13 requirements.
6.How does Aetrix verify that AP65502SP-13 is sourced from the original manufacturer or authorized distributors?
All AP65502SP-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 AP65502SP-13 meets industry standards.
7.What is the process for return or replacement of AP65502SP-13?
All AP65502SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP65502SP-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 AP65502SP-13 part is unused and in its original packaging.
Return procedure for AP65502SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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