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Diodes Incorporated AP65552SP-13
- Part No.:
- AP65552SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP65552SP-13.pdf
- Description:
- IC REG BUCK ADJ 5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,477
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Product details
Overview
AP65552SP-13 from Diodes Incorporated is a synchronous step-down DC-DC converter IC delivering 5A continuous output current, operating from 4.5V–18V input and supporting adjustable 0.76V–6V output via resistor divider feedback. It employs adaptive constant-on-time (COT) control with 650kHz pseudo-fixed switching frequency, integrated 65mΩ high-side and 36mΩ low-side MOSFETs, and is optimized for digital TV and monitor power rails.
For engineers reviewing the AP65552SP-13 datasheet, AP65552SP-13 pinout, AP65552SP-13 application, or AP65552SP-13 equivalent, key selection criteria include its SO-8EP thermal performance (θJA = 39.4°C/W), programmable soft-start timing, adaptive COT transient response, and compatibility with low-ESR ceramic/POSCAP output capacitors.
Technical Context
The AP65552SP-13 implements adaptive constant-on-time control where on-time is inversely proportional to VIN and proportional to VOUT, enabling stable operation across wide input/output voltage ratios without external compensation. Its internal error amplifier compares FB voltage (0.765V typical) against a precision reference and drives the gate drivers through a proprietary timing circuit.
It integrates dual N-channel MOSFETs with RDS(ON) of 65mΩ (HS) and 36mΩ (LS), supports pre-biased startup, and features cycle-by-cycle overcurrent protection with hysteresis-triggered OCL threshold reduction after 16 consecutive faults. Thermal shutdown activates at TJ = +160°C with +30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 18V - Supports 5V, 12V, and 15V intermediate bus architectures without derating. |
| Output Voltage Range | 0.76V to 6V - Programmable via external resistor divider; 0.765V FB reference enables sub-1V core rail generation. |
| Continuous Output Current | 5A - Delivers full rated load in SO-8EP package with proper PCB thermal vias and 2oz copper. |
| Switching Frequency | 650kHz - Pseudo-constant frequency set by adaptive on-time; enables compact LC filter design (e.g., 1.5µH + 44µF). |
| High-Side RDS(ON) | 65mΩ - Limits conduction loss at 5A to ~1.6W max under worst-case conditions. |
| Low-Side RDS(ON) | 36mΩ - Reduces synchronous rectification loss and improves light-load efficiency vs. diode-based buck. |
| Soft-Start Control | Current-source based (6µA typ) - Enables precise ramp time setting via external SS-to-GND capacitor. |
Pinout & Package
AP65552SP-13 is housed in an SO-8EP (exposed pad) thermally enhanced package with 8 leads and an exposed thermal pad connected to GND for improved heat dissipation (θJC = 8.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Digital logic-level input; ≥1.9V enables regulator; pull-up to VIN ensures automatic startup. |
| FB (Pin 2) | Feedback sensing node | Monitors output voltage via resistive divider; regulates to 0.765V reference with ±12mV tolerance. |
| VREG5 (Pin 3) | Internal LDO output | Supplies 5V (4.7–5.5V) bias for internal circuitry; requires 1µF ceramic capacitor to GND. |
| SS (Pin 4) | Soft-start timing node | Charged by 6µA internal current source; capacitor value sets output voltage ramp time. |
| GND (Pin 5) | Main power ground | Reference for all analog and switching circuits; must be low-impedance connection to thermal pad. |
| SW (Pin 6) | Power switch node | Connects to inductor and bootstrap capacitor; carries high dI/dt switching current (5A peak). |
| BS (Pin 7) | Bootstrap supply terminal | Forms floating gate drive for high-side MOSFET; requires 0.1µF ceramic capacitor to SW. |
| VIN (Pin 8) | Main input supply | Accepts 4.5–18V; requires local 10µF+ ceramic capacitor to suppress high-frequency ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT control | Eliminates need for external loop compensation while maintaining stability with ceramic, SP-CAP, or POSCAP output capacitors. |
| Synchronous rectification | Integrated 65mΩ HS / 36mΩ LS MOSFETs reduce conduction loss and improve full-load efficiency >92% at 12V→1.05V/5A. |
| Programmable soft-start | 6µA internal current source allows precise control of output voltage ramp time using external SS capacitor. |
| Pre-biased startup support | Enables safe turn-on into pre-charged output rails without reverse current flow or output voltage undershoot. |
| Robust protection suite | Includes UVLO (3.45V trip, 320mV hysteresis), cycle-by-cycle OCP, thermal shutdown (160°C), and overtemperature hysteresis (30°C). |
Applications
| Flat Screen TV Power Rails | FPGA Core Supply |
|---|---|
|
Use Scenario: Regulating 1.05V/5A core voltage for SoC in 4K UHD television main board. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing dynamic load transients during video decoding bursts. Use Value: Adaptive COT delivers <10µs recovery from 0→5A load step, minimizing output droop below ±30mV. |
Use Scenario: Providing clean 1.2V/4A supply to Xilinx Artix-7 FPGA I/O bank with tight regulation tolerance. IC Role / Device Role / Timing Role: Point-of-load (POL) regulator with programmable soft-start to prevent inrush-induced system reset. Use Value: Pre-biased startup and 0.765V FB reference enable accurate tracking of FPGA VCCO requirements without rail collapse. |
| Set-Top Box Main Processor | Home Audio DSP Supply |
|
Use Scenario: Generating 1.8V/3A for ARM Cortex-A53 application processor in streaming media box. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping down from 12V to 1.8V with minimal thermal footprint. Use Value: SO-8EP package with exposed pad achieves ≤45°C rise at 3A with 2oz copper PCB, eliminating need for heatsink. |
Use Scenario: Delivering low-noise 3.3V/2A supply to TI C5000-series audio DSP in premium soundbar. IC Role / Device Role / Timing Role: Low-ripple POL regulator with fast transient response to handle real-time audio processing load spikes. Use Value: 650kHz switching and ceramic output capacitor support <15mVpp output ripple at 2A, meeting audio SNR requirements. |
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) | Fixed 500kHz frequency, 3.5A rating, no adaptive COT - uses voltage-mode control with external compensation. | Limited to ≤3.5A loads; requires additional compensation network; less effective for wide VIN/VOUT ratios. | Select when lower cost and simpler layout outweigh need for 5A capability and adaptive transient response. |
| TPS54560BQDDARQ1 (TI) | Adjustable frequency (100kHz–2.5MHz), 5A rating, Eco-mode for light-load efficiency, but larger SO-PowerPAD-8 package. | Higher quiescent current (146µA vs. 900µA); automotive-grade AEC-Q100 qualification; no pre-biased startup. | Select for automotive environments requiring AEC-Q100 or when programmable frequency tuning is critical for EMI compliance. |
Compared with MP2315DJ-LF-Z and TPS54560BQDDARQ1, the AP65552SP-13 uniquely combines 5A capability, adaptive COT control for zero-compensation design, pre-biased startup, and SO-8EP thermal performance - making it optimal for space-constrained consumer electronics with dynamic load profiles.
Availability
AP65552SP-13 is available at Aetrix Electronics and suitable for flat screen TV sets, gaming consoles, and FPGA/DSP power supplies requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for AP65552SP-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-performance power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.
The AP65552 belongs to Diodes' high-current synchronous buck converter product line, engineered specifically for low-voltage, high-transient digital TV, monitor, and set-top box power rails where compact size, thermal efficiency, and rapid load-step response are critical.
FAQ
What is the minimum recommended output capacitance for stable operation?
The AP65552SP-13 is designed to operate stably with ceramic output capacitors as low as 22µF, provided they exhibit ≤10mΩ ESR. The datasheet specifies 44µF (C2) in the typical application circuit for 1.05V/5A operation, and confirms stability with POSCAP/SP-CAP types due to its adaptive COT architecture's ESR independence.
Does AP65552SP-13 support forced PWM mode or only auto-skip mode?
The AP65552SP-13 operates exclusively in adaptive constant-on-time (COT) mode and does not offer a forced PWM or auto-skip mode selection. Its control scheme inherently adjusts off-time dynamically based on FB voltage and maintains pseudo-constant 650kHz frequency across load and input conditions without mode switching.
Can the AP65552SP-13 be used with an input voltage below 4.5V?
No - the absolute minimum input voltage is 4.5V per the Recommended Operating Conditions table. Operation below this violates specification: UVLO disables the device below 3.45V, and internal bias circuitry (e.g., VREG5) is not guaranteed functional below 4.5V VIN, risking undefined behavior or failure to regulate.
How is thermal performance affected if the exposed pad is not soldered to PCB ground?
Omitting thermal pad connection increases θJA from 39.4°C/W to >70°C/W, causing junction temperature to exceed 125°C at just 2.5A load - triggering thermal shutdown. The datasheet mandates soldering the EP to a GND plane with ≥6 thermal vias (0.3mm diameter) to achieve rated 5A performance and reliability.
AP65552SP-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):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 5A
- Frequency - Switching:
- 650kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP65552SP-13 FAQ
1.How can I place an order for AP65552SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP65552SP-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 AP65552SP-13 reliable?
The price and inventory of AP65552SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP65552SP-13 is usually 5 days.
3.What payment methods are accepted for AP65552SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP65552SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP65552SP-13?
AP65552SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP65552SP-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 AP65552SP-13?
For technical support, including AP65552SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP65552SP-13 requirements.
6.How does Aetrix verify that AP65552SP-13 is sourced from the original manufacturer or authorized distributors?
All AP65552SP-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 AP65552SP-13 meets industry standards.
7.What is the process for return or replacement of AP65552SP-13?
All AP65552SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP65552SP-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 AP65552SP-13 part is unused and in its original packaging.
Return procedure for AP65552SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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