My Inquiry
My Account
Diodes Incorporated AP3003S-ADJTRG1
- Part No.:
- AP3003S-ADJTRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP3003S-ADJTRG1.pdf
- Description:
- IC REG BUCK ADJ 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,568
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP3003S-ADJTRG1 from BCD Semiconductor is an adjustable-output, 150kHz fixed-frequency PWM buck DC-DC converter in TO-263-5 package, delivering up to 3A load current with ±3% output voltage tolerance. It operates from 4.5V–32V input, integrates internal frequency compensation and thermal shutdown, and supports TTL-compatible ON/OFF control - used in LCD TV power rails requiring stable 2.5V–12V regulation.
For engineers reviewing the AP3003S-ADJTRG1 datasheet, AP3003S-ADJTRG1 pinout, AP3003S-ADJTRG1 application, or AP3003S-ADJTRG1 equivalent, key selection criteria include feedback reference accuracy (1.23V), standby quiescent current (80µA typ), saturation voltage (1.5V max at 3A), and compatibility with standard 22µH inductors for minimal external component count.
Technical Context
The AP3003S-ADJTRG1 implements a current-mode PWM control architecture with a built-in 150kHz oscillator, error amplifier, and 1.23V precision reference. Its internal driver stage delivers up to 3A peak switch current with 100% maximum duty cycle capability and automatic thermal shutdown activation above 150°C junction temperature.
Feedback is implemented via resistive divider connected to the FEEDBACK pin, enabling output voltage programming from 2.5V to 12V. The ON/OFF pin provides TTL-level enable/disable control with 0.6V low threshold and 2.0V high threshold, while standby mode reduces IQ to 80µA typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Guaranteed 3A continuous load current - enables single-chip supply for high-current digital logic or display bias rails. |
| Switching Frequency | Fixed 150kHz (typ) - balances EMI control and inductor size; frequency shift occurs only under second-stage current limit. |
| Feedback Reference | 1.23V ±2% (1.18–1.28V) - sets output voltage via R1/R2 divider; enables precise 2.5V–12V programmability. |
| Input Voltage Range | 4.5V to 32V - supports wide-input industrial and consumer DC sources including 12V/24V battery or adapter inputs. |
| Efficiency | 73% (typ) at VIN=12V, VOUT=2.5V, IOUT=3A - reflects real-world conversion loss with standard external components. |
| Quiescent Current | 10mA (typ) active, 80µA (typ) standby - ensures low no-load power draw in always-on systems. |
| Thermal Shutdown | Activates at TJ ≥150°C - protects device during overload or poor heatsinking; auto-recovery on cooldown. |
Pinout & Package
AP3003S-ADJTRG1 uses the TO-263-5 surface-mount package with exposed metal tab (internally connected to GND) for enhanced thermal dissipation. Package dimensions: 15.14 × 10.18 × 4.67 mm (L×W×H), lead pitch 2.54 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Unregulated input supply | Accepts 4.5–32V DC; requires 470µF bulk capacitance for stability and ripple suppression. |
| 2 OUTPUT | Switch node output | Drives external inductor; connects to cathode of catch diode and inductor input; high dv/dt node. |
| 3 GND | Power and signal ground | Common return for IC internals, feedback network, and output capacitor; tied to exposed metal tab. |
| 4 FEEDBACK | Voltage sense input | Monitors divided output voltage; 1.23V reference sets regulation point; bias current ≤100nA minimizes divider error. |
| 5 ON/OFF | TTL-compatible enable control | Logic-low (≤0.6V) disables regulator and enters 80µA standby; logic-high (≥2.0V) enables full operation. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | Programmable 2.5V–12V via external resistor divider - eliminates need for multiple fixed-voltage SKUs. |
| Integrated Compensation | Internal frequency compensation - removes requirement for external compensation network, reducing design cycle time. |
| Low Standby IQ | 80µA typical quiescent current in shutdown - extends battery life in portable or standby-power-sensitive applications. |
| Built-in Protection | Current limit (3.4–4.5A peak) + thermal shutdown - prevents damage during short-circuit or overheating without external circuitry. |
| Minimal External Parts | Only 4 components required: inductor, output capacitor, input capacitor, catch diode - accelerates layout and validation. |
Applications
| LCD Monitor Power Rail | DVD Recorder Main Supply |
|---|---|
|
Use Scenario: Generating stable 3.3V or 5V rail for LCD panel timing controller and interface logic. IC Role / Device Role / Timing Role: Primary step-down regulator converting 12V unregulated input to regulated low-noise logic supply. Use Value: High line/load regulation (<±0.2%) maintains display timing integrity across varying input and load conditions. |
Use Scenario: Providing 5V/3A main system supply for DVD servo motor drivers and MPEG decoder ICs. IC Role / Device Role / Timing Role: High-current DC-DC converter replacing linear regulators to reduce heat and improve efficiency. Use Value: 80% efficiency at 3A load cuts power dissipation by >50% versus linear solution, easing thermal design. |
| PDP Display Subsystem | On-Card DC-DC Converter |
|
Use Scenario: Delivering 12V bias for plasma display sustain circuits with tight transient response. IC Role / Device Role / Timing Role: High-input-voltage buck regulator accepting 24V bus and regulating to 12V with fast load-step recovery. Use Value: 150kHz switching enables compact 22µH inductor and fast loop response to sustain pulse current demands. |
Use Scenario: Local 2.5V supply for FPGA I/O banks or DDR memory termination on dense PCBs. IC Role / Device Role / Timing Role: Compact, self-contained buck converter minimizing board area and routing complexity. Use Value: TO-263-5 package with GND-tab thermal path achieves 60°C/W θJA - supports 3A operation without heatsink. |
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 | 380kHz switching, 4A rated, requires external compensation, 2.5V–28V input | Better transient response but higher EMI; needs careful layout for stability | Preferred when higher efficiency at light loads or faster regulation is critical |
| LM2596S-ADJ | 150kHz, 3A, 4.5V–40V input, no integrated thermal shutdown, larger TO-220-5 footprint | Lacks standby mode (IQ = 5mA); less robust protection set | Suitable for cost-sensitive designs where thermal margin is ample and standby not required |
Compared with MP1584EN-LF-Z and LM2596S-ADJ, AP3003S-ADJTRG1 offers integrated thermal protection and ultra-low 80µA standby IQ - making it optimal for thermally constrained or battery-backed LCD and PDP subsystems where reliability and quiescent power are prioritized over peak efficiency.
Availability
AP3003S-ADJTRG1 is available at Aetrix Electronics and suitable for LCD monitor power rails, DVD recorder main supplies, PDP display subsystems, and on-card DC-DC converters requiring stable component supply across industrial temperature range (−40°C to +85°C).
Supply support for AP3003S-ADJTRG1 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-reliability, cost-optimized power management solutions for consumer and industrial markets.
The AP3003 series belongs to BCD's standard buck converter product line, engineered for minimal external component count and robust operation in space-constrained, thermally demanding applications like flat-panel displays and optical storage devices.
FAQ
What output voltage range can be programmed with AP3003S-ADJTRG1?
The AP3003S-ADJTRG1 supports output voltages from 2.5V to 12V using an external resistor divider on the FEEDBACK pin. The internal 1.23V reference (±2%) sets the regulation point: VOUT = 1.23V × (1 + R2/R1). Typical configurations include 2.5V (R1=2.49kΩ, R2=1.58kΩ), 3.3V (R1=2.49kΩ, R2=4.18kΩ), and 5.0V (R1=2.49kΩ, R2=7.57kΩ), all verified per datasheet Figure 3.
Does AP3003S-ADJTRG1 require an external compensation network?
No. AP3003S-ADJTRG1 integrates full frequency compensation internally, eliminating the need for external compensation components. This simplifies design and reduces bill-of-materials count - only four external parts (inductor, input/output capacitors, and catch diode) are required for basic operation, as confirmed in the General Description and Figure 19–20 typical applications.
What is the thermal performance of the TO-263-5 package under 3A load?
In free-air conditions without heatsink, the TO-263-5 package has a junction-to-ambient thermal resistance (θJA) of 60°C/W. At 3A output with 85% efficiency and 12V input, power dissipation is ~0.6W, resulting in ~36°C junction rise above ambient - well within the −40°C to +125°C operating range. The exposed GND tab enhances conduction cooling when soldered to large copper areas.
Can AP3003S-ADJTRG1 operate with input voltage below 4.5V?
No. The absolute minimum recommended input voltage is 4.5V, as specified in the Recommended Operating Conditions table (page 5). Operation below this level risks failure to start or unstable regulation due to insufficient headroom for the internal bias regulator and driver stage. The 32V maximum input and 40V absolute maximum rating apply only at the upper end.
AP3003S-ADJTRG1 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-ADJTRG1 FAQ
1.How can I place an order for AP3003S-ADJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3003S-ADJTRG1 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-ADJTRG1 reliable?
The price and inventory of AP3003S-ADJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3003S-ADJTRG1 is usually 5 days.
3.What payment methods are accepted for AP3003S-ADJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3003S-ADJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3003S-ADJTRG1?
AP3003S-ADJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3003S-ADJTRG1 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-ADJTRG1?
For technical support, including AP3003S-ADJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3003S-ADJTRG1 requirements.
6.How does Aetrix verify that AP3003S-ADJTRG1 is sourced from the original manufacturer or authorized distributors?
All AP3003S-ADJTRG1 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-ADJTRG1 meets industry standards.
7.What is the process for return or replacement of AP3003S-ADJTRG1?
All AP3003S-ADJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3003S-ADJTRG1, 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-ADJTRG1 part is unused and in its original packaging.
Return procedure for AP3003S-ADJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP3003S-ADJTRG1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
