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Diodes Incorporated AP6502SP-13
- Part No.:
- AP6502SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP6502SP-13.pdf
- Description:
- IC REG BUCK ADJ 2A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,426
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Product details
Overview
AP6502SP-13 from Diodes Incorporated is a 340 kHz, 4.7–18 V input, synchronous step-down DC/DC converter with integrated 130 mΩ high- and low-side MOSFETs, delivering up to 2 A continuous output current at 3.3 V (95% peak efficiency), featuring current-mode control, programmable soft-start, and overcurrent/thermal shutdown protection - used in FPGA/DSP power supplies and flat-panel TV main rails.
For engineers reviewing the AP6502SP-13 datasheet, AP6502SP-13 pinout, AP6502SP-13 application, or AP6502SP-13 equivalent, key selection criteria include its 0.925 V feedback reference, 340 kHz fixed switching frequency, SO-8EP thermal pad layout, and compatibility with standard 10 µH inductors and dual 22 µF output capacitors in consumer-grade distributed power systems.
Technical Context
The AP6502SP-13 implements current-mode control with internal slope compensation to suppress subharmonic oscillation at half-switching frequency (170 kHz), enabling stable operation across wide VIN/VOUT ranges. Its error amplifier features 800 V/V gain and 1000 µA/V transconductance, interfacing directly with an external RC network on the COMP pin for loop stabilization.
Protection architecture includes cycle-by-cycle overcurrent detection via high-side RDS(ON) sensing (4.4 A limit), thermal shutdown at +160°C with +40°C hysteresis, input UVLO with 4.05 V rising threshold and 250 mV hysteresis, and FB overvoltage lockout at 1.1 V - all implemented without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.7 V to 18 V - supports 5 V, 12 V, and 15 V intermediate bus rails without pre-regulation. |
| Output Current | 2 A continuous (3 A peak) - sustains full load at 3.3 V out with 12 V in and 10 µH inductor per typical application. |
| Feedback Reference | 0.925 V ±25 mV - sets output voltage via resistor divider; enables 1.2 V to 16 V adjustable range with <1% line/load regulation. |
| Switching Frequency | 340 kHz (±12%) - balances EMI performance and inductor size; fold-back mode reduces to 102 kHz under overcurrent. |
| RDS(ON) HS/LS | 130 mΩ each - minimizes conduction loss; enables >90% efficiency at 1 A load with 12 V → 3.3 V conversion. |
| Soft-Start Time | 15 ms with 0.1 µF SS-to-GND capacitor - controls inrush current during power-up; resets on EN toggle or thermal fault. |
| Thermal Resistance | θJA = 74 °C/W (SO-8EP) - requires exposed pad soldered to PCB ground plane for safe 2 A operation at +85°C ambient. |
Pinout & Package
AP6502SP-13 uses a Green SO-8EP package (5.0 mm × 6.0 mm × 1.75 mm) with exposed thermal pad connected to Pin 4 (GND) for enhanced heat dissipation. The EP pad must be soldered to a minimum 1" × 1" 2 oz copper ground plane with ≥4 thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | Bootstrap supply for high-side gate driver | Requires ≥0.01 µF ceramic capacitor from BST to SW to sustain 100% duty cycle capability and prevent high-side FET dropout. |
| IN (Pin 2) | Main power input | Accepts 4.7–18 V; must be bypassed with ≥10 µF low-ESR capacitor close to pin to suppress switching noise and UVLO false triggers. |
| SW (Pin 3) | Switching node | Connects to inductor input; carries high di/dt; layout must minimize loop area to reduce EMI and voltage ringing. |
| GND (Pin 4) | Power and signal ground reference | Shared return for power path and analog circuitry; exposed pad must be tied directly to this pin and large ground plane. |
| FB (Pin 5) | Output voltage feedback input | Senses resistive divider output; 0.925 V reference enables precise regulation; sensitive to noise - route away from SW and IN traces. |
| COMP (Pin 6) | Loop compensation node | Output of internal transconductance amplifier; connects to RC network (e.g., 6.8 kΩ + 6.8 nF) to set crossover <34 kHz and phase margin >45°. |
| EN (Pin 7) | Enable control input | Logic-compatible; 0.7–0.9 V turn-on threshold with 220 mV hysteresis; 100 kΩ pull-up to IN ensures automatic startup. |
| SS (Pin 8) | Soft-start timing control | 6 µA internal current source charges external capacitor; floating disables soft-start; 0.1 µF yields 15 ms ramp time. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Matched 130 mΩ HS/LS MOSFETs eliminate external switch selection and gate drive design effort. |
| Current-Mode Control | Enables fast transient response (<10 µs recovery from 1 A → 2 A load step) and inherent cycle-by-cycle current limiting. |
| Programmable Soft-Start | External capacitor sets ramp time (e.g., 0.1 µF = 15 ms), preventing output overshoot and inrush stress on input capacitors. |
| Comprehensive Protection | Includes UVLO (4.05 V), OCP (4.4 A HS limit), thermal shutdown (+160°C), and FB overvoltage lockout (1.1 V). |
| SO-8EP Thermal Design | Exposed pad + θJC = 16 °C/W enables 2 A operation at +85°C ambient when properly mounted on 2 oz copper with thermal vias. |
Applications
| Gaming Console Core Rails | FPGA/DSP Point-of-Load Supply |
|---|---|
|
Use Scenario: Powers GPU and CPU core logic in compact gaming consoles where board space and thermal density are constrained. IC Role / Device Role / Timing Role: Primary synchronous buck regulator generating 1.2 V/1.8 V core voltages from 12 V intermediate bus. Use Value: 95% peak efficiency and SO-8EP thermal pad reduce heatsink requirements; 340 kHz switching avoids audible noise in consumer audio bands. |
Use Scenario: Supplies configurable logic and DSP cores in embedded vision or edge AI modules requiring clean, stable low-voltage rails. IC Role / Device Role / Timing Role: Adjustable-output buck converter delivering 1.2 V or 1.8 V with tight regulation (<±1%) under dynamic load steps. Use Value: Current-mode control provides <10 µs transient response to 50% load steps; FB accuracy (±25 mV) ensures compliance with FPGA VCCINT tolerances. |
| Flat-Panel TV Main Logic Rail | Distributed Home Audio Power |
|
Use Scenario: Generates 3.3 V system rail for SoC, memory, and interface ICs in LED/LCD TV main boards operating at ambient up to +85°C. IC Role / Device Role / Timing Role: High-current (2 A) buck converter with integrated MOSFETs replacing discrete controller + external switches. Use Value: SO-8EP package simplifies thermal management; 4.7–18 V input range accommodates varying front-end DC/DC outputs across TV models. |
Use Scenario: Powers digital signal processors and DACs in multi-channel home audio receivers where EMI must meet CISPR-22 Class B limits. IC Role / Device Role / Timing Role: Low-noise synchronous buck regulator with fixed 340 kHz frequency and optimized layout for minimal conducted emissions. Use Value: Integrated power stage eliminates gate-drive loop radiation; soft-start prevents pop-noise during system power-up sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 36 V max VIN, 0.8 A output, 2 MHz switching, no BST pin - requires external bootstrap diode/capacitor. | Targeted at higher-input industrial sensors; lacks 2 A capability and SO-8EP thermal performance for consumer power rails. | Select only if input exceeds 18 V or board space demands 2 MHz operation; verify thermal derating at 2 A. |
| LSP5527W5-13 | Direct Diodes replacement: 18 V VIN, 2.5 A, 500 kHz, same SO-8EP footprint, improved 0.8 V reference and lower RDS(ON). | Drop-in upgrade path with identical pinout and layout compatibility; supports higher load margins and tighter regulation. | Preferred for new designs - matches AP6502SP-13 mechanicals while improving efficiency and thermal headroom. |
Compared with MP2451DT-LF-Z, AP6502SP-13 delivers 2.5× higher output current and superior thermal performance in SO-8EP; versus LSP5527W5-13, it offers legacy design continuity but lacks the newer part's lower quiescent current and tighter FB tolerance.
Availability
AP6502SP-13 is available at Aetrix Electronics and suitable for gaming console power subsystems, flat-panel TV main logic rails, and FPGA point-of-load supplies requiring stable component supply through extended production cycles.
Supply support for AP6502SP-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 power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP6502SP-13 belongs to Diodes' AP6xxx series of integrated synchronous buck converters, designed specifically for cost-sensitive, space-constrained consumer electronics requiring high efficiency and simplified layout.
FAQ
What is the recommended input capacitor for AP6502SP-13?
A minimum 10 µF low-ESR ceramic capacitor placed within 3 mm of the IN and GND pins is required to suppress high-frequency switching noise and prevent UVLO false triggering. For 12 V input, use X5R/X7R 1206 or larger with ≤10 mΩ ESR; add bulk electrolytic (e.g., 47 µF) if input source impedance exceeds 100 mΩ.
Can AP6502SP-13 operate at 100% duty cycle?
No - AP6502SP-13 cannot sustain 100% duty cycle due to bootstrap capacitor recharge requirement. The BST-to-SW capacitor must be periodically recharged during low-side conduction; minimum off-time limits maximum duty cycle to ~90% at 340 kHz. For 100% DCM operation, consider a controller with external gate drivers or integrated charge pump.
How does the AP6502SP-13 handle overcurrent conditions?
It implements cycle-by-cycle overcurrent protection by sensing high-side MOSFET RDS(ON) voltage drop ~30 ns after turn-on. When peak inductor current exceeds 4.4 A, the COMP pin discharges and switching frequency folds back to 102 kHz, reducing current limit to 70% and preventing thermal runaway while maintaining regulated output.
Is AP6502SP-13 pin-compatible with LSP5527W5-13?
Yes - LSP5527W5-13 shares identical SO-8EP package dimensions, pin numbering, and functional pin assignments (BST, IN, SW, GND, FB, COMP, EN, SS). Layout reuse is possible; however, LSP5527W5-13 features updated internal compensation and tighter FB tolerance (±15 mV), requiring verification of loop stability with existing RC network.
AP6502SP-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):
- 4.7V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.925V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 2A
- Frequency - Switching:
- 340kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP6502SP-13 FAQ
1.How can I place an order for AP6502SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP6502SP-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 AP6502SP-13 reliable?
The price and inventory of AP6502SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP6502SP-13 is usually 5 days.
3.What payment methods are accepted for AP6502SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP6502SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP6502SP-13?
AP6502SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP6502SP-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 AP6502SP-13?
For technical support, including AP6502SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP6502SP-13 requirements.
6.How does Aetrix verify that AP6502SP-13 is sourced from the original manufacturer or authorized distributors?
All AP6502SP-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 AP6502SP-13 meets industry standards.
7.What is the process for return or replacement of AP6502SP-13?
All AP6502SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP6502SP-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 AP6502SP-13 part is unused and in its original packaging.
Return procedure for AP6502SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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