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Diodes Incorporated AP3003S-12TRE1
- Part No.:
- AP3003S-12TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP3003S-12TRE1.pdf
- Description:
- IC REG BUCK 12V 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,100
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Product details
Overview
AP3003S-12TRE1 from BCD Semiconductor is a fixed-frequency PWM buck DC-DC converter delivering 12V ±4% output at up to 3A load current, with 150kHz internal oscillator, 4–32V input range, and TO-263-5 package. It integrates current limit protection, thermal shutdown, TTL-compatible ON/OFF control, and operates in LCD TV power rails and on-card DC-DC conversion.
For engineers reviewing the AP3003S-12TRE1 datasheet, AP3003S-12TRE1 pinout, AP3003S-12TRE1 application, or AP3003S-12TRE1 equivalent, key selection criteria include guaranteed 3A output capability, fixed 12V regulation tolerance, thermal performance in TO-263-5, standby IQ of 80µA, and compatibility with standard 22µH inductors.
Technical Context
The AP3003S-12TRE1 implements a voltage-mode PWM controller with internal 1.23V reference, error amplifier, 150kHz oscillator, and driver stage driving an integrated N-channel MOSFET switch. Feedback is taken directly from output for fixed versions, enabling minimal external component count.
It features cycle-by-cycle current limiting (typ. 4.5A peak), thermal shutdown at 150°C junction temperature, and logic-level ON/OFF control with 0.6V low threshold and 2.0V high threshold. The device maintains stable regulation across –40°C to +125°C operating junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12.0V ±4% - tightly regulated fixed output suitable for powering logic rails and display bias supplies without external feedback resistors. |
| Max Output Current | 3A continuous - supports high-current loads such as LCD backlight drivers or PDP sustain circuits without external current boosting. |
| Switching Frequency | 150kHz (typ.) - enables use of compact, low-cost 22µH inductors and reduces EMI filtering complexity compared to higher-frequency alternatives. |
| Input Voltage Range | 4V to 32V - accommodates wide-input industrial and consumer DC sources including 12V/24V battery or adapter inputs. |
| Efficiency | 88% at VIN=24V, IOUT=3A - minimizes thermal dissipation in space-constrained TO-263-5 packages, reducing heatsink requirements. |
| Quiescent Current | 80µA in standby - enables low-power system sleep modes while retaining fast wake-up response via TTL ON/OFF pin. |
| Thermal Shutdown | 150°C junction - protects against sustained overload or poor PCB thermal design without external sensing circuitry. |
Pinout & Package
AP3003S-12TRE1 uses the TO-263-5 surface-mount package with exposed metal tab tied to GND for enhanced thermal conduction. The package measures 15.14 × 10.18 mm and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Unregulated input supply | Accepts 4–32V DC; requires local 470µF bulk capacitance to suppress input ripple and support peak current demands. |
| 2 OUTPUT | Switch node output | Drives external catch diode and LC filter; connects directly to inductor; carries high di/dt switching current. |
| 3 GND | Power and signal ground | Common return for internal circuitry, thermal pad connection point, and low-impedance path for switch current return. |
| 4 FEEDBACK | Regulation sense input | Internally connected to 12V output divider; no external components required for fixed 12V version. |
| 5 ON/OFF | TTL-compatible enable/disable control | Logic-low (≤0.6V) disables regulator and reduces IQ to 80µA; logic-high (≥2.0V) enables full operation. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12V output | Eliminates external resistor network, reducing BOM count and layout sensitivity for dedicated 12V rail generation. |
| Integrated current limit | 4.5A typical peak current limit prevents destructive overloads during short-circuit or startup without external sensing. |
| Thermal shutdown | Self-protecting operation at 150°C junction ensures reliability under sustained overload or inadequate heatsinking. |
| Low standby IQ | 80µA quiescent current in shutdown mode extends battery life in portable or always-on auxiliary power applications. |
| Minimal external parts | Only four components required: input cap, output cap, inductor, and catch diode - accelerates design cycle and improves yield. |
Applications
| LCD Monitor Power Supply | On-Card DC-DC Converter |
|---|---|
Use Scenario: Generating stable 12V bias for TFT panel gate drivers and source drivers in desktop LCD monitors. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24V board supply to isolated 12V rail with tight line/load regulation. Use Value: Delivers 3A continuous current with ≤0.2% output voltage deviation across 0.2–3A load range and 15–32V input variation. |
Use Scenario: Local 12V power domain on embedded video processing cards requiring high-current, low-noise supply. IC Role / Device Role / Timing Role: Compact, thermally robust buck converter mounted directly on application PCB near load. Use Value: TO-263-5 package enables direct thermal coupling to copper pour, sustaining 3A output without external heatsink at 50°C ambient. |
| DVD Recorder Main Rail | PDP Sustain Circuit Supply |
Use Scenario: Providing main 12V rail for servo motors, spindle drivers, and digital signal processors in DVD recorders. IC Role / Device Role / Timing Role: High-efficiency (88%) primary DC-DC stage minimizing heat buildup inside enclosed chassis. Use Value: 150kHz switching frequency balances EMI compliance and inductor size, allowing use of off-the-shelf 22µH Sumida CDRH127 series. |
Use Scenario: Supplying pulsed 12V sustain voltage to plasma display panel electrodes during active display periods. IC Role / Device Role / Timing Role: Robust power stage handling repetitive 3A load transients with built-in current limiting and thermal foldback. Use Value: Cycle-by-cycle current limit (4.5A peak) prevents latch-up during electrode arcing events, ensuring system-level fault resilience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-12 | 5V to 40V input, 150kHz, 3A, but requires external compensation and has higher dropout (1.5V vs. AP3003's 1.2V saturation). | Wider input range suits 36V industrial systems; lower efficiency (83% typ.) increases thermal load in TO-263. | Select when input exceeds 32V or when legacy LM2596 footprint compatibility is required. |
| MP1584EN-LF-Z | 4.5–28V input, 1.5MHz, 3A, adjustable only; needs external feedback resistors even for 12V setup. | Higher frequency allows smaller inductors but increases EMI filtering burden and reduces light-load efficiency. | Prefer for space-constrained designs where 2.2µH inductors are acceptable and 12V tolerance >±4% is tolerable. |
Compared with LM2596S-12 and MP1584EN-LF-Z, AP3003S-12TRE1 offers tighter 12V tolerance (±4%), lower minimum input (4V), integrated fixed-feedback, and optimized thermal performance in TO-263-5 - making it superior for cost-sensitive, thermally constrained 12V consumer electronics rails.
Availability
AP3003S-12TRE1 is available at Aetrix Electronics and suitable for LCD monitor power supplies, on-card DC-DC converters, DVD recorder main rails, and PDP sustain circuit supplies requiring stable component supply, RoHS-compliant packaging, and tape-and-reel delivery for automated assembly.
Supply support for AP3003S-12TRE1 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
BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and power IC designer specializing in high-voltage, high-current monolithic solutions for consumer, industrial, and computing markets.
The AP3003 series was developed to simplify high-current buck conversion in cost-sensitive displays and optical storage devices, emphasizing minimal external components, thermal robustness, and drop-in replacement capability for legacy linear regulators.
FAQ
What is the maximum recommended input voltage for AP3003S-12TRE1?
The absolute maximum input voltage is 40V, but the recommended operating maximum is 32V per datasheet Section 5. Exceeding 32V risks premature thermal shutdown or reduced long-term reliability, especially at high ambient temperatures or full 3A load. For 12V output, typical input is 24V to maintain ≥88% efficiency.
Does AP3003S-12TRE1 require an external feedback resistor network?
No. The "12" in the part number denotes fixed 12V output; the FEEDBACK pin is internally connected to the output divider. External resistors are only needed for the adjustable (ADJ) version. This eliminates tuning errors and improves production consistency for dedicated 12V applications.
How does the ON/OFF pin behave during shutdown?
When the ON/OFF pin is pulled below 0.6V (TTL low), the internal driver disables, output drops to zero, and quiescent current falls to 80µA typical. The device retains full functionality upon rising edge - no reset or soft-start delay is introduced, enabling fast system-level power sequencing.
Can AP3003S-12TRE1 be used without a heatsink in TO-263-5 package?
Yes, under defined conditions: at 3A load, 24V input, and 50°C ambient, the TO-263-5 package achieves ~115°C junction temperature using 1-in² 2-oz copper thermal pad - within the 125°C max operating limit. Larger copper areas or forced airflow further improve margin.
AP3003S-12TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 15V
- Voltage - Input (Max):
- 32V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-5
AP3003S-12TRE1 FAQ
1.How can I place an order for AP3003S-12TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3003S-12TRE1 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 AP3003S-12TRE1 reliable?
The price and inventory of AP3003S-12TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3003S-12TRE1 is usually 5 days.
3.What payment methods are accepted for AP3003S-12TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3003S-12TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3003S-12TRE1?
AP3003S-12TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3003S-12TRE1 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 AP3003S-12TRE1?
For technical support, including AP3003S-12TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3003S-12TRE1 requirements.
6.How does Aetrix verify that AP3003S-12TRE1 is sourced from the original manufacturer or authorized distributors?
All AP3003S-12TRE1 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 AP3003S-12TRE1 meets industry standards.
7.What is the process for return or replacement of AP3003S-12TRE1?
All AP3003S-12TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3003S-12TRE1, 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 AP3003S-12TRE1 part is unused and in its original packaging.
Return procedure for AP3003S-12TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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