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Diodes Incorporated AP65500SP-13
- Part No.:
- AP65500SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP65500SP-13.pdf
- Description:
- IC REG BUCK ADJ 5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,084
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Product details
Overview
AP65500SP-13 from Diodes Incorporated is a 340kHz external-compensated synchronous buck DC/DC converter with integrated high- and low-side MOSFETs (RDS(ON) = 80 mΩ / 32 mΩ), delivering up to 5A continuous output current at up to 96% efficiency, featuring automated light-load efficiency improvement and 0.8V–16V adjustable VOUT, used in FPGA/DSP power supplies and flat-panel TV main rails.
For engineers reviewing the AP65500SP-13 datasheet, AP65500SP-13 pinout, AP65500SP-13 application, or AP65500SP-13 equivalent, key selection criteria include VIN range (4.75–18V), current-mode control for fast transient response, thermal shutdown at 160°C, and SO-8EP package compatibility with distributed power architectures.
Technical Context
The AP65500SP-13 implements current-mode control with internal slope compensation to suppress subharmonic oscillation at half-switching frequency (170kHz), enabling stable loop operation across wide load and input ranges. Its error amplifier features 800 V/V gain and 1000 µA/V transconductance, interfacing directly with the COMP pin for external RC network tuning.
It integrates cycle-by-cycle overcurrent protection with hiccup-mode recovery, UVLO (4.05V rising threshold, 250mV hysteresis), and overvoltage lockout triggered at 1.0V FB (125% of 0.8V reference). Thermal shutdown activates at 160°C with 40°C hysteresis, ensuring safe restart at ~120°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.75V to 18V - supports 5V, 12V, and 15V intermediate bus rails without pre-regulation. |
| Continuous Output Current | 5A - sustains full-rated load without derating at +85°C ambient with SO-8EP on 2s2p PCB. |
| Switching Frequency | 340kHz (±12%) - balances EMI performance and inductor size; fold-back to 102kHz during overload. |
| Feedback Reference Voltage | 0.800V ±1% - enables precise output regulation from 0.8V to 16V via resistor divider. |
| RDS(ON) (HS / LS) | 80 mΩ / 32 mΩ - minimizes conduction loss; enables >94% efficiency at 3.3V/5A with 12V input. |
| Thermal Resistance θJA | 43°C/W - validated on FR-4 2"x2" board with 2oz copper and thermal vias; supports 5A continuous operation. |
| Soft-Start Time | 13ms (with 0.1µF SS-to-GND capacitor) - prevents inrush current and output overshoot during power-up. |
Pinout & Package
The AP65500SP-13 is housed in a Green SO-8EP (exposed pad) package compliant with RoHS, halogen-free, and antimony-free standards. The exposed pad (EP) must be soldered to a PCB ground plane for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BS (Pin 1) | Bootstrap Supply Input | Provides gate drive voltage for high-side MOSFET; requires ≥0.01µF capacitor from BS to SW. |
| IN (Pin 2) | Main Power Input | Accepts 4.75–18V supply; bypassed to GND with bulk ceramic capacitor to suppress switching noise. |
| SW (Pin 3) | Switch Node | Connects to inductor input; carries high di/dt; critical for layout-keep trace short and wide. |
| GND (Pin 4) | Power & Signal Ground | Common return for power paths and analog circuitry; tied to EP for thermal and noise integrity. |
| FB (Pin 5) | Feedback Input | Senses output voltage via resistive divider; regulated to 0.800V; high-impedance input (bias <100nA). |
| COMP (Pin 6) | Compensation Node | Output of internal transconductance error amplifier; connects to external RC network for loop stability. |
| EN (Pin 7) | Enable Control | Active-high digital input; 0.8V rising threshold, 2.5V lockout; 100kΩ pull-up enables auto-start. |
| SS (Pin 8) | Soft-Start Timing | Controls ramp rate of internal reference; 6µA current source charges external capacitor to set startup time. |
Key Features
| Feature | Design Value |
|---|---|
| Automated Light-Load Efficiency Mode | Reduces quiescent current to ≤3.0 µA in shutdown and dynamically switches to PFM-like operation below ~0.5A load. |
| Integrated Power Stage | Monolithic high- and low-side N-MOSFETs eliminate external driver complexity and reduce BOM count by ≥4 components. |
| Robust Protection Suite | Includes hiccup-mode OCP (7A peak), thermal shutdown (160°C), UVLO (4.05V), and FB overvoltage (1.0V) with automatic discharge. |
| External Compensation Flexibility | COMP pin allows full control over loop bandwidth and phase margin-enables optimization for diverse output capacitors and loads. |
| Green SO-8EP Packaging | RoHS-compliant, halogen- and antimony-free construction with θJA = 43°C/W-supports industrial temperature range (-40°C to +85°C). |
Applications
| Gaming Console Core Power | FPGA & ASIC Core Rails |
|---|---|
|
Use Scenario: Powers GPU and CPU cores in compact gaming consoles requiring tight voltage tolerance and rapid load-step response. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 1.2V/5A with ±1% regulation under dynamic 0–5A load steps. Use Value: Current-mode control ensures <50µs recovery from 5A→2.5A transients; light-load mode extends standby battery life. |
Use Scenario: Supplies configurable logic and hardened IP blocks in Xilinx/Intel FPGAs where rail sequencing and low noise are critical. IC Role / Device Role / Timing Role: Adjustable 0.8–1.8V output regulator with soft-start and enable sequencing for multi-rail power domains. Use Value: External COMP pin enables fine-tuning for low-ESR ceramic output caps; SS pin supports controlled power-up timing. |
| Flat-Panel TV Main Logic Rail | Distributed Network System PSU |
|
Use Scenario: Generates 3.3V/5A main logic rail in LED-backlit TVs, operating from 12V intermediate bus with minimal heatsinking. IC Role / Device Role / Timing Role: High-efficiency buck converter replacing discrete controllers + MOSFETs in space-constrained front-end designs. Use Value: 96% peak efficiency reduces thermal load; SO-8EP footprint fits narrow board margins; EN pin enables system-level power gating. |
Use Scenario: Powers PoE-powered switches, routers, and edge compute nodes requiring reliable 5V/5A conversion from 12–15V backplane rails. IC Role / Device Role / Timing Role: Distributed point-of-load regulator with hiccup-mode OCP to prevent cascading failures in multi-node systems. Use Value: Thermal shutdown with 40°C hysteresis ensures graceful degradation; RoHS/Green compliance meets global telecom sourcing mandates. |
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 (Monolithic Power) | 36V max VIN, 0.8A output, fixed 330kHz fSW; no light-load optimization or external COMP. | Limited to low-current auxiliary rails; lacks programmable soft-start and thermal hysteresis. | Choose only for <1A, high-VIN (>24V) auxiliary supplies where cost outweighs performance. |
| TPS54560BQPWPRQ1 (TI) | 60V max VIN, 5A output, integrated compensation, but no light-load algorithm; larger HTSSOP-20 package. | Requires more PCB area; fixed internal loop compensation limits flexibility with ceramic output caps. | Select when automotive AEC-Q100 qualification is mandatory and design prioritizes simplified layout over light-load efficiency. |
Compared with MP2451DT-LF-Z and TPS54560BQPWPRQ1, the AP65500SP-13 uniquely combines 5A capability, light-load efficiency enhancement, external loop compensation, and SO-8EP compactness-making it optimal for consumer and industrial distributed power where thermal headroom and standby power matter.
Availability
AP65500SP-13 is available at Aetrix Electronics and suitable for FPGA core power, flat-panel TV logic rails, and distributed network system point-of-load conversion requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.
Supply support for AP65500SP-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 AP65500 belongs to Diodes' high-current synchronous buck converter product line, designed specifically for space-constrained, thermally sensitive applications needing >5A output with minimal external components and robust protection.
FAQ
What is the minimum recommended input capacitance for AP65500SP-13?
The datasheet specifies a 44µF ceramic input capacitor as sufficient for most applications. This value is selected to handle RMS ripple current exceeding half the 5A load and to minimize voltage droop during high di/dt switching events. Use X5R/X7R dielectrics rated for ≥16V with low ESR; parallel smaller ceramics may be added for HF noise suppression.
Can AP65500SP-13 operate without an external soft-start capacitor?
Yes-leaving the SS pin floating disables soft-start, causing immediate full-reference startup. However, this risks output overshoot and inrush current spikes into downstream capacitors. For reliable operation, especially with large output capacitance (>100µF), a 0.1µF capacitor (13ms ramp) is strongly recommended per the datasheet's typical application circuit.
How does the AP65500SP-13 implement light-load efficiency improvement?
It automatically transitions from continuous PWM mode to a discontinuous, pulse-skipping mode below ~0.5A load. This reduces switching losses and gate drive consumption while maintaining regulation. Quiescent current drops to ≤3.0 µA in shutdown, and light-load operation preserves >85% efficiency at 10mA output-verified in Figure 12 of DS36112 Rev. 1-2.
Is the SO-8EP exposed pad electrically isolated or grounded?
The exposed pad (EP) is internally connected to GND and must be soldered to a PCB ground plane. It serves dual roles: thermal conduction (reducing θJA by ~30%) and low-inductance grounding for high-frequency return currents. No isolation or thermal compound is required-standard reflow soldering to a solid GND copper area with ≥4 thermal vias is mandatory.
AP65500SP-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):
- 18V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 5A
- 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
AP65500SP-13 FAQ
1.How can I place an order for AP65500SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP65500SP-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 AP65500SP-13 reliable?
The price and inventory of AP65500SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP65500SP-13 is usually 5 days.
3.What payment methods are accepted for AP65500SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP65500SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP65500SP-13?
AP65500SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP65500SP-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 AP65500SP-13?
For technical support, including AP65500SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP65500SP-13 requirements.
6.How does Aetrix verify that AP65500SP-13 is sourced from the original manufacturer or authorized distributors?
All AP65500SP-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 AP65500SP-13 meets industry standards.
7.What is the process for return or replacement of AP65500SP-13?
All AP65500SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP65500SP-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 AP65500SP-13 part is unused and in its original packaging.
Return procedure for AP65500SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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