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Diodes Incorporated AP65453SP-13
- Part No.:
- AP65453SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP65453SP-13.pdf
- Description:
- IC REG BUCK ADJ 4A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,576
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Product details
Overview
AP65453SP-13 from Diodes Incorporated is a synchronous step-down DC-DC converter IC delivering 4A continuous output current, operating from 4.5V to 18V input, with adaptive constant-on-time (COT) control, 650kHz pseudo-fixed switching frequency, and 0.765V ±1.5% feedback reference voltage-designed for stable low-voltage regulation in flat-panel TV power rails.
For engineers reviewing the AP65453SP-13 datasheet, AP65453SP-13 pinout, AP65453SP-13 application, or AP65453SP-13 equivalent, key selection considerations include its seamless CCM-to-DCM transition at light load, internal 90mΩ high-side/57mΩ low-side MOSFETs, programmable soft-start via external capacitor, and compatibility with both ceramic and polymer output capacitors without ESR dependency.
Technical Context
The AP65453SP-13 implements adaptive COT control-on-time inversely proportional to VIN and proportional to VOUT-to maintain ~650kHz operation across input/output ratios while eliminating need for external compensation. Its internal error amplifier compares FB voltage against 0.765V reference and triggers on-time pulses when VFB drops below threshold.
It supports pre-biased start-up and transitions automatically between continuous conduction mode (CCM) above ~1.2A and discontinuous conduction mode (DCM) below that threshold, sustaining >85% efficiency at 10mA load. Overcurrent protection uses valley-current sensing during low-side conduction, with 16-cycle fault accumulation and temperature-compensated trip level.
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 Current | 4A continuous - enables single-regulator supply for FPGA core, SoC I/O, or DDR memory rails. |
| Feedback Reference | 0.765V ±1.5% - sets output accuracy to ±1% over line/load/temperature with standard resistor divider. |
| Switching Frequency | ~650kHz - balances EMI filtering cost and inductor size; fixed by adaptive on-time, not oscillator. |
| HS/LS RDS(on) | 90mΩ / 57mΩ - reduces conduction loss; enables >92% peak efficiency at 12VIN/1.05VOUT/3A. |
| Soft-Start Control | Current-source ramp (6μA) into external SS capacitor - allows precise 1–20ms startup time tuning. |
| Thermal Shutdown | 150°C trip with 25°C hysteresis - protects SO-8EP package under sustained overload or poor PCB thermal design. |
Pinout & Package
The AP65453SP-13 is housed in an SO-8EP (exposed pad) thermally enhanced package, with the EP soldered to PCB ground plane for optimal thermal dissipation (θJA = 38.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Digital logic-level input; high ≥1.25V enables regulator; direct connection to VIN enables automatic startup. |
| FB (Pin 2) | Feedback sensing node | High-impedance input monitoring output voltage via resistive divider; regulates to 0.765V reference. |
| VREG5 (Pin 3) | Internal LDO output | 5.1V ±3% regulated supply for gate drivers; requires 1μF ceramic decoupling to GND. |
| SS (Pin 4) | Soft-start timing node | Accepts external capacitor to set linear output voltage ramp time; discharges during shutdown. |
| GND (Pin 5) | Power ground reference | Main return path for switch current and control circuitry; must be low-inductance connection to EP. |
| SW (Pin 6) | Power switching node | Drives external LC filter; connects to inductor and bootstrap capacitor; swings from GND to VIN. |
| BS (Pin 7) | Bootstrap supply terminal | Connects to SW via 0.1μF ceramic capacitor to generate gate drive voltage for high-side NMOS. |
| VIN (Pin 8) | Main input supply | Accepts 4.5–18V DC; requires local 10μF+ ceramic input capacitor for ripple suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT Control | Enables stable loop response with no external compensation required, even with ultra-low-ESR ceramic output caps. |
| Synchronous Rectification | Integrated 90mΩ/57mΩ MOSFETs eliminate external diode, reducing conduction loss and board area. |
| Light-Load DCM Mode | Automatically enters discontinuous conduction mode below ~1.2A, maintaining >85% efficiency at 10mA. |
| Programmable Soft-Start | 6μA internal current source charges external SS capacitor, enabling adjustable 1–20ms output ramp to prevent inrush. |
| Pre-Biased Start-Up | Allows safe startup into pre-charged output rail-critical for hot-swap and multi-rail sequencing applications. |
Applications
| Gaming Console Core Supply | FPGA/ASIC Core Rail |
|---|---|
Use Scenario: Powers GPU or CPU core voltage (e.g., 1.05V/3A) in compact gaming consoles where thermal headroom is limited. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated core voltage with fast transient response to dynamic load steps. Use Value: Adaptive COT control delivers <50µs recovery from 0→4A load step, minimizing output droop and eliminating need for large bulk capacitance. | Use Scenario: Supplies configurable logic core voltage (e.g., 1.2V/2.5A) in Xilinx Artix-7 or Intel Cyclone V FPGA designs. IC Role / Device Role / Timing Role: High-accuracy DC-DC converter with 0.765V reference and ±1% total output tolerance over temperature and line variation. Use Value: Internal 90mΩ/57mΩ MOSFETs achieve >91% efficiency at 12VIN/1.2VOUT, reducing heat sink requirements in dense PCB layouts. |
| Flat Panel TV Main Logic Rail | Set-Top Box SoC Power |
Use Scenario: Generates 3.3V/2A main logic supply for TV mainboard MCU, video processor, and interface controllers. IC Role / Device Role / Timing Role: Primary intermediate bus regulator converting 12V system rail to clean, low-noise 3.3V domain. Use Value: SO-8EP package with exposed pad ensures reliable thermal performance in enclosed TV chassis with minimal airflow. | Use Scenario: Provides 1.8V/2A power to ARM-based SoC (e.g., Broadcom BCM72xx) in cable/satellite STB designs. IC Role / Device Role / Timing Role: Efficient, low-ripple buck converter supporting dynamic DVFS voltage scaling during channel change or streaming. Use Value: Seamless CCM-to-DCM transition maintains >87% efficiency from full load down to 50mA, extending standby battery life in remote-powered units. |
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 | Fixed 650kHz frequency (non-adaptive), 3.5A rating, 4.5–28V input, no pre-bias start-up | Lacks adaptive COT and pre-biased start-up; less suitable for FPGA hot-swap or multi-rail sequencing | Choose when wider input range (up to 28V) is needed and light-load efficiency is secondary. |
| TPS54332DR | Voltage-mode control, 3.5A, 3.5–28V input, external compensation required, no DCM mode | Requires loop compensation network; higher BOM count and layout sensitivity than AP65453SP-13 | Prefer when strict EMI profile control via fixed-frequency PWM is mandatory and thermal constraints allow larger solution size. |
Compared with MP2315DJ-LF-Z and TPS54332DR, the AP65453SP-13 offers superior light-load efficiency via DCM, eliminates compensation components, and supports pre-biased start-up-making it optimal for space-constrained, multi-rail consumer electronics where rapid transient response and thermal reliability are critical.
Availability
AP65453SP-13 is available at Aetrix Electronics and suitable for flat-panel TV power supplies, gaming console core rails, and set-top box SoC regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP65453SP-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 high-volume consumer and industrial markets.
The AP65453SP-13 belongs to Diodes' high-efficiency synchronous buck converter product line, engineered specifically for low-voltage, high-current digital loads in TVs, monitors, and multimedia devices where thermal density and transient performance are critical.
FAQ
What is the minimum recommended output capacitor value and ESR for stable operation?
The AP65453SP-13 is stable with ceramic output capacitors as low as 22µF and ESR <5mΩ. Typical designs use 22–68µF X7R/X5R ceramics; ESR directly impacts output ripple magnitude (ΔVOUT ≈ ESR × ΔIL). Polymer or SP-CAPs with ESR <10mΩ are also supported due to COT's ESR independence.
Does the AP65453SP-13 support forced PWM mode, or is DCM automatic?
The AP65453SP-13 operates exclusively in automatic mode: CCM at loads >~1.2A and DCM below that threshold. There is no pin or register to force continuous PWM; DCM activation is inherent to the adaptive COT architecture and improves light-load efficiency without external control.
Can the AP65453SP-13 be used with an input voltage below 4.5V?
No-4.5V is the absolute minimum input voltage per datasheet specifications. Below this, UVLO disables operation (trip point = 3.45V with 320mV hysteresis). Attempting operation at 4.2V will result in intermittent or no regulation; for sub-4.5V inputs, consider the AP65300 series or similar 2.5–18V-input alternatives.
How is thermal performance affected if the exposed pad (EP) is not soldered to PCB ground?
Leaving the EP unsoldered increases θJA from 38.6°C/W to >80°C/W, risking thermal shutdown at ≤2A load. The EP is electrically GND and thermally critical: it must be soldered to a minimum 100mm² copper pour tied to internal GND planes via ≥4 thermal vias (0.3mm diameter) for rated 4A operation.
AP65453SP-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
AP65453SP-13 FAQ
1.How can I place an order for AP65453SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP65453SP-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 AP65453SP-13 reliable?
The price and inventory of AP65453SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP65453SP-13 is usually 5 days.
3.What payment methods are accepted for AP65453SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP65453SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP65453SP-13?
AP65453SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP65453SP-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 AP65453SP-13?
For technical support, including AP65453SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP65453SP-13 requirements.
6.How does Aetrix verify that AP65453SP-13 is sourced from the original manufacturer or authorized distributors?
All AP65453SP-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 AP65453SP-13 meets industry standards.
7.What is the process for return or replacement of AP65453SP-13?
All AP65453SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP65453SP-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 AP65453SP-13 part is unused and in its original packaging.
Return procedure for AP65453SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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