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Diodes Incorporated AP3003S-ADJTRE1
- Part No.:
- AP3003S-ADJTRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP3003S-ADJTRE1.pdf
- Description:
- IC REG BUCK ADJ 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,375
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Product details
Overview
AP3003S-ADJTRE1 from BCD Semiconductor is an adjustable-output, 150 kHz fixed-frequency PWM buck DC-DC converter in TO-263-5 package, delivering up to 3 A load current with ±3% output voltage tolerance, 32 V max input, and integrated thermal shutdown. It serves as the main step-down regulator in compact, high-current embedded power rails such as LCD TV mainboard supplies.
For engineers reviewing the AP3003S-ADJTRE1 datasheet, AP3003S-ADJTRE1 pinout, AP3003S-ADJTRE1 application, or AP3003S-ADJTRE1 equivalent, key selection criteria include feedback reference voltage (1.23 V), standby quiescent current (80 µA typ), saturation voltage (1.5 V at 3 A), and compatibility with standard 22 µH power inductors.
Technical Context
The AP3003S-ADJTRE1 implements a current-mode PWM control architecture with internal 150 kHz oscillator and error amplifier referenced to a precision 1.23 V bandgap. Its feedback loop accepts external resistor dividers to program output voltages from 1.23 V to 32 V, while the ON/OFF pin provides TTL-compatible enable/disable control.
Thermal shutdown activates at 150 °C junction temperature, and cycle-by-cycle current limiting protects against overload with peak current threshold of 3.4–4.5 A. The device operates across –40 °C to +125 °C junction range and supports input voltages up to 32 V with no external compensation required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Guaranteed 3 A continuous load capability without derating at 25 °C ambient with heatsink. |
| Switching Frequency | Fixed 150 kHz (±23 kHz) enables predictable EMI filtering and compact magnetics design. |
| Feedback Reference | 1.23 V ±0.05 V internal reference sets output accuracy and stability for adjustable configurations. |
| Input Voltage Range | 4 V to 32 V operation supports wide-input industrial and consumer DC bus applications. |
| Quiescent Current | 10 µA typical operating IQ ensures low no-load power loss in battery-backed systems. |
| Standby Current | 80 µA typical ISTBY enables ultra-low-power sleep mode when ON/OFF pin is high. |
| Saturation Voltage | 1.5 V typical VSAT at 3 A defines minimum dropout and impacts efficiency at high load. |
| Efficiency | 73% typ at 2.5 V/3 A (VIN=12 V), rising to 88% at 12 V/3 A (VIN=24 V), enabling thermally constrained layouts. |
Pinout & Package
AP3003S-ADJTRE1 uses the TO-263-5 surface-mount package with exposed metal tab tied to GND for thermal dissipation. 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 4–32 V DC; requires local 470 µF bulk capacitance for ripple suppression. |
| 2 OUTPUT | Switch node output | Drives external Schottky diode and LC filter; connects directly to inductor and catch diode anode. |
| 3 GND | Power and signal ground | Common return for all internal circuits; metal tab is electrically connected to this pin. |
| 4 FEEDBACK | Voltage sense input | Monitors output via resistor divider; 1.23 V threshold triggers regulation loop correction. |
| 5 ON/OFF | TTL-compatible enable | Logic low (<0.6 V) disables switching; logic high (>2.0 V) enables operation with 5 µA input current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current limit | 3.4–4.5 A peak threshold prevents MOSFET overstress during short-circuit events. |
| Thermal shutdown | Activates at 150 °C junction temperature and auto-recovers after cooldown. |
| No external compensation | Internal frequency compensation eliminates need for external RC network on EA pin. |
| Low standby IQ | 80 µA typical current draw in shutdown reduces system-level standby power by >90% vs active mode. |
| Standard inductor support | Optimized for 22 µH shielded power inductors (e.g., Sumida CDRH127/LDNP-220MC). |
| TTL-compatible enable | Direct interface with microcontroller GPIO without level-shifting circuitry. |
Applications
| LCD TV Mainboard Power | DVD Recorder System Rail |
|---|---|
Use Scenario: Generating stable 2.5 V or 3.3 V for video processing SoC and memory on LCD TV mainboards with 12 V or 24 V DC input. IC Role / Device Role / Timing Role: Primary step-down regulator providing regulated core and I/O rail with tight load regulation (<±0.2%) under dynamic video load changes. Use Value: Eliminates need for external compensation and reduces BOM count to only four passive components, accelerating layout and validation. | Use Scenario: Supplying 5 V at 3 A to DVD drive motor controller, MPEG decoder, and front-panel MCU in DVD recorders. IC Role / Device Role / Timing Role: High-current buck converter managing transient loads from spindle motor startup and laser diode pulsing. Use Value: 150 kHz fixed frequency simplifies EMI filter design, and thermal shutdown prevents latch-up during mechanical jams. |
| PDP Display Logic Supply | On-Card Industrial DC-DC |
Use Scenario: Delivering 3.3 V to PDP display timing controllers and address drivers from unregulated 15–24 V board supply. IC Role / Device Role / Timing Role: Compact, heatsink-free power stage replacing linear regulators to reduce thermal density on display sub-boards. Use Value: TO-263-5 package with GND-tab mounting achieves 60 °C/W θJA without external heatsink, saving board space. | Use Scenario: Providing isolated 1.2–12 V programmable output for FPGA I/O banks or sensor signal chains on industrial PCBs. IC Role / Device Role / Timing Role: Adjustable buck regulator enabling single-BOM flexibility across multiple product variants with different voltage requirements. Use Value: ±3% output tolerance and 1.23 V reference allow precise rail tuning without trimming resistors or post-assembly calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1584EN-LF-Z | Higher 1.5 MHz switching frequency; lower 2 A rated output; requires external compensation. | Better suited for space-constrained designs needing smaller inductors, but less robust for sustained 3 A loads. | Select MP1584EN-LF-Z only if board area is critical and peak load ≤2 A; verify thermal performance under full load. |
| LM2596S-ADJ/NOPB | 150 kHz same frequency; 3 A rating; requires external compensation; higher 3.5 V min VIN. | Compatible pinout for drop-in replacement in legacy LM2596 layouts, but lacks TTL shutdown and has higher IQ (5 mA). | Choose LM2596S-ADJ/NOPB for direct upgrade paths where ON/OFF control and ultra-low standby IQ are not required. |
Compared with MP1584EN-LF-Z and LM2596S-ADJ/NOPB, AP3003S-ADJTRE1 uniquely combines 3 A guaranteed output, integrated compensation, TTL shutdown, and 80 µA standby IQ in a single TO-263-5 package-making it optimal for cost-sensitive, thermally constrained, and low-power-standby industrial power rails.
Availability
AP3003S-ADJTRE1 is available at Aetrix Electronics and suitable for LCD TV mainboard power, DVD recorder system rails, and PDP display logic supplies requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AP3003S-ADJTRE1 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, and mixed-signal process technologies for consumer and industrial applications.
The AP3003 series belongs to BCD's standard buck regulator product line, designed specifically for cost-effective, high-reliability DC-DC conversion in mainstream consumer electronics with minimal external component count.
FAQ
What is the minimum input voltage required for AP3003S-ADJTRE1 to regulate a 2.5 V output?
The datasheet specifies a minimum input voltage of 4 V for the adjustable version. For reliable regulation at 2.5 V output, VIN must exceed the sum of VOUT plus saturation voltage (VSAT ≈ 1.5 V) and diode forward drop (~0.4 V), yielding ~4.4 V practical minimum. Operation below 4 V risks dropout and loss of regulation.
Can AP3003S-ADJTRE1 be used without an external catch diode?
No. The AP3003S-ADJTRE1 is a non-synchronous buck controller with an internal N-channel MOSFET switch but no integrated synchronous rectifier. An external Schottky diode (e.g., 1N5822) is mandatory for flyback path conduction and energy transfer during switch-off periods.
How does the FEEDBACK pin function in adjustable mode?
In adjustable mode, the FEEDBACK pin senses output voltage via a resistor divider (R1–R2). The internal 1.23 V reference compares against the divided voltage; deviation adjusts PWM duty cycle to maintain regulation. Typical design uses R1 = 2.49 kΩ and R2 selected per VOUT = 1.23 × (1 + R2/R1).
Is the metal tab on the TO-263-5 package electrically connected?
Yes. The metal tab on AP3003S-ADJTRE1's TO-263-5 package is internally bonded to Pin 3 (GND). It must be soldered to a large copper pour tied to system ground to ensure effective thermal dissipation and electrical safety-no isolation or insulation is required beneath the tab.
AP3003S-ADJTRE1 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 25V
- 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-ADJTRE1 FAQ
1.How can I place an order for AP3003S-ADJTRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3003S-ADJTRE1 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-ADJTRE1 reliable?
The price and inventory of AP3003S-ADJTRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3003S-ADJTRE1 is usually 5 days.
3.What payment methods are accepted for AP3003S-ADJTRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3003S-ADJTRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3003S-ADJTRE1?
AP3003S-ADJTRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3003S-ADJTRE1 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-ADJTRE1?
For technical support, including AP3003S-ADJTRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3003S-ADJTRE1 requirements.
6.How does Aetrix verify that AP3003S-ADJTRE1 is sourced from the original manufacturer or authorized distributors?
All AP3003S-ADJTRE1 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-ADJTRE1 meets industry standards.
7.What is the process for return or replacement of AP3003S-ADJTRE1?
All AP3003S-ADJTRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3003S-ADJTRE1, 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-ADJTRE1 part is unused and in its original packaging.
Return procedure for AP3003S-ADJTRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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