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Diodes Incorporated AP65454SP-13
- Part No.:
- AP65454SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP65454SP-13.pdf
- Description:
- IC REG BUCK ADJ 4A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,902
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Product details
Overview
AP65454SP-13 from Diodes Incorporated is a synchronous step-down DC-DC converter with adaptive constant-on-time (COT) control, delivering 4A continuous output current at 0.76V–6V adjustable output voltage from a 4.5V–18V input. It integrates 90mΩ high-side and 57mΩ low-side NMOS switches, operates at 650kHz pseudo-fixed frequency, and supports ceramic, SP-CAP, and POSCAP output capacitors. Used in flat-panel TV power rails and FPGA core supplies.
For engineers reviewing the AP65454SP-13 datasheet, AP65454SP-13 pinout, AP65454SP-13 application, or AP65454SP-13 equivalent, key selection criteria include CCM operation at light load for EMI control, programmable soft-start via external capacitor, pre-biased startup capability, and thermal shutdown at +160°C with +25°C hysteresis.
Technical Context
The AP65454SP-13 employs adaptive COT control: on-time is dynamically adjusted based on VIN and VOUT to maintain ~650kHz switching across input/output ratios, eliminating need for external compensation. Its internal error amplifier compares FB voltage (0.765V nominal) against a precision reference and drives the high-side switch via a one-shot timer.
It operates in continuous conduction mode (CCM) even at light loads-unlike typical DCM buck converters-reducing EMI emissions. Overcurrent protection uses valley-current sensing during low-side conduction, with 16-cycle fault accumulation and temperature-compensated trip threshold to accommodate RDS(on) drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 18V - supports 5V, 12V, and 15V intermediate bus systems without external regulators. |
| Output Voltage Range | 0.76V to 6V - adjustable via resistive divider; 0.765V FB reference enables precise core voltage regulation for ASICs/FPGAs. |
| Continuous Output Current | 4A - sufficient for mid-power SoC cores, DDR memory termination, and display logic rails. |
| Switching Frequency | 650kHz - balances inductor size, efficiency, and EMI filtering requirements in consumer power designs. |
| High-Side RDS(on) | 90mΩ - limits conduction loss at 4A (0.36W), enabling SO-8EP thermal performance up to +125°C ambient. |
| Low-Side RDS(on) | 57mΩ - reduces freewheeling loss and improves light-load efficiency versus discrete solutions. |
| Soft-Start Control | Current-source-based (6μA typ.) - allows precise ramp time setting with external SS-to-GND capacitor. |
| Thermal Shutdown | +160°C with +25°C hysteresis - ensures safe recovery after overload without manual reset. |
Pinout & Package
AP65454SP-13 is housed in an SO-8EP (exposed pad) package, optimized for thermal dissipation with θJA = 38.56°C/W under standard 2"×2" 2oz copper PCB layout. The exposed pad (Pin 9, EP) must be soldered to a GND plane with ≥6 thermal vias for reliable 4A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Digital logic-level enable; connects directly to VIN for automatic startup; thresholds: VENH ≥ 1.25V, VENL ≤ 0.85V. |
| FB (Pin 2) | Feedback voltage sense | Monitors output via resistor divider; internal 0.765V reference sets regulation accuracy ±1.5% over temp. |
| VREG5 (Pin 3) | Internal LDO output | Supplies 5.1V (±3%) for gate drive; requires 1µF ceramic capacitor to GND; inactive when EN = low. |
| SS (Pin 4) | Soft-start timing node | Charged by 6μA current source; external capacitor sets output ramp time (e.g., 100nF → ~17ms). |
| GND (Pin 5) | Main power ground | Reference for SW, BS, and feedback circuitry; must be low-impedance connection to PCB GND plane. |
| SW (Pin 6) | Power switch node | Connects to inductor; carries full switching current; requires low-ESR input/output capacitors and tight layout. |
| BS (Pin 7) | Bootstrap supply | Drives high-side gate via 0.1µF capacitor to SW; external 5V bootstrap diode recommended below 5.5V VIN. |
| VIN (Pin 8) | Main input supply | Accepts 4.5–18V; requires ≥10µF low-ESR ceramic capacitor placed adjacent to pin for ripple suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 90mΩ/57mΩ MOSFETs eliminate external diode losses and improve full-load efficiency >92% at 12V→1.05V/4A. |
| Adaptive COT control | Self-adjusting on-time eliminates loop compensation components and ensures stable operation with ceramic, SP-CAP, or POSCAP outputs. |
| Pre-biased startup | Allows safe power-up into pre-charged output rails without reverse current flow-critical for multi-rail systems with sequencing constraints. |
| CCM at light load | Maintains continuous inductor current down to zero load, reducing EMI noise peaks compared to DCM-mode competitors. |
| Programmable OCP with hysteresis | 16-cycle fault counter and temperature-compensated trip level prevent false triggering during transient surges while protecting against sustained overloads. |
Applications
| Flat Panel TV Power Rails | FPGA Core Supply |
|---|---|
|
Use Scenario: Regulating 1.05V/4A for LCD controller SoC in 4K UHD television main board. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated core voltage with fast transient response to video processing load changes. Use Value: Adaptive COT control delivers <10µs recovery from 0→4A load step, minimizing voltage droop below ±3% spec. |
Use Scenario: Delivering 1.2V/3.5A to Xilinx Artix-7 FPGA core in broadcast equipment. IC Role / Device Role / Timing Role: Core voltage regulator with pre-biased startup supporting hot-swap and rail sequencing requirements. Use Value: Enables safe power-up into pre-charged 1.2V rail without reverse current, satisfying FPGA vendor sequencing specs. |
| Set-Top Box SoC Supply | Home Audio DSP Rail |
|
Use Scenario: Generating 1.8V/2.5A for ARM-based media processor in streaming device. IC Role / Device Role / Timing Role: Intermediate bus converter stepping 12V down to SoC I/O and memory interface voltage. Use Value: 650kHz switching allows compact 1.5µH inductor and 22µF ceramic output cap, reducing board area by 35% vs. 300kHz alternatives. |
Use Scenario: Providing low-noise 3.3V/1.2A supply to TI C5000-series audio DSP in smart speaker design. IC Role / Device Role / Timing Role: Low-EMI power stage operating in CCM to avoid audible switching noise coupling into analog audio paths. Use Value: Continuous conduction mode eliminates sub-harmonic tones in 20Hz–20kHz band, meeting IEC 60268-16 audio noise 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 |
|---|---|---|---|
| AP65450SP-13 | Same SO-8EP package, identical pinout, but fixed 1.05V output (non-adjustable); lacks FB pin and external divider. | Targeted at cost-sensitive, single-output applications where voltage flexibility is unnecessary. | Select when system requires only 1.05V and board space for feedback resistors must be minimized. |
| RT7272BGJ6F | Fixed 600kHz frequency (not adaptive COT); higher quiescent current (1.2mA vs. 0.6mA); no pre-biased startup support. | Better suited for industrial systems requiring deterministic frequency for EMI filtering, not consumer transient-heavy loads. | Choose when strict EMI compliance mandates fixed-frequency operation and light-load efficiency is secondary. |
Compared with AP65450SP-13, the AP65454SP-13 adds output adjustability and feedback control at minor BOM cost; versus RT7272BGJ6F, it trades deterministic frequency for superior transient response and lower IQ-making it preferable for digital TV and gaming console power rails.
Availability
AP65454SP-13 is available at Aetrix Electronics and suitable for flat-panel TV power rails, FPGA core supplies, and set-top box SoC regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP65454SP-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs, with emphasis on power management, signal integrity, and protection devices for consumer, industrial, and computing markets.
The AP65454SP-13 belongs to Diodes' AP65xxx adaptive COT buck converter family, designed specifically for high-efficiency, low-noise, and fast-transient-response DC-DC conversion in digital TV, monitor, and multimedia SoC power systems.
FAQ
What is the minimum recommended output capacitance for stable operation?
The AP65454SP-13 supports ultra-low-ESR ceramic, SP-CAP, and POSCAP capacitors. For 4A operation at 1.05V, Diodes recommends ≥22µF total output capacitance with ≤5mΩ ESR. Using two 10µF/0805 X7R ceramics in parallel meets both capacitance and ESR targets while improving thermal derating.
Does AP65454SP-13 support forced PWM mode or only CCM/DCM auto-transition?
The AP65454SP-13 operates exclusively in adaptive COT mode and does not offer forced PWM or selectable DCM mode. It maintains continuous conduction mode (CCM) across all load conditions-including zero load-to ensure consistent EMI profile and eliminate sub-harmonic noise, per its design specification.
Can the SS pin be left floating or must it be tied to GND if soft-start is not required?
The SS pin must never be left floating. If soft-start is not required, connect SS directly to GND to force immediate startup. Leaving it unconnected risks undefined biasing of the internal error amplifier's non-inverting input, potentially causing erratic regulation or failure to start.
Is the exposed thermal pad (EP) electrically connected to GND internally?
Yes-the exposed pad (Pin 9) is internally connected to the GND terminal. It must be soldered to a PCB GND plane using ≥6 thermal vias (0.3mm diameter) to achieve specified θJA = 38.56°C/W and sustain 4A continuous operation at +85°C ambient.
AP65454SP-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):
- 0.765V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 4A
- 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
AP65454SP-13 FAQ
1.How can I place an order for AP65454SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP65454SP-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 AP65454SP-13 reliable?
The price and inventory of AP65454SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP65454SP-13 is usually 5 days.
3.What payment methods are accepted for AP65454SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP65454SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP65454SP-13?
AP65454SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP65454SP-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 AP65454SP-13?
For technical support, including AP65454SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP65454SP-13 requirements.
6.How does Aetrix verify that AP65454SP-13 is sourced from the original manufacturer or authorized distributors?
All AP65454SP-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 AP65454SP-13 meets industry standards.
7.What is the process for return or replacement of AP65454SP-13?
All AP65454SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP65454SP-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 AP65454SP-13 part is unused and in its original packaging.
Return procedure for AP65454SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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