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Diodes Incorporated AP1507-D5L-U
- Part No.:
- AP1507-D5L-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-6, DPAK (5 Leads + Tab)
- Datasheet:
-
AP1507-D5L-U.pdf
- Description:
- IC REG BUCK ADJ 3A TO252-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,330
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Product details
Overview
AP1507-D5L-U from Diodes Incorporated is a monolithic 150 kHz, 3A non-synchronous PWM buck DC/DC converter with integrated power switch, fixed 5V output, TO-252-5L package, thermal shutdown, and current-limit protection-designed for high-efficiency step-down regulation in industrial power supplies and embedded systems.
For engineers reviewing the AP1507-D5L-U datasheet, AP1507-D5L-U pinout, AP1507-D5L-U application, or AP1507-D5L-U equivalent, this device delivers stable 5V/3A output with ±4% voltage tolerance, 80% efficiency at 12VIN/3A, ON/OFF logic control, internal compensation, and RoHS-compliant lead-free packaging.
Technical Context
The AP1507-D5L-U implements voltage-mode PWM control with a fixed 150 kHz oscillator (±15%), enabling compact LC filter design. Its internal 3A N-channel DMOS switch eliminates external transistor requirements, while the 1.23V reference and feedback amplifier enable precise output regulation without external compensation components.
Thermal shutdown activates above +125°C junction temperature, and cycle-by-cycle current limiting triggers at 3.6–5.5A peak switch current. When VFB drops below 0.5V during overcurrent, switching frequency reduces to 10–50 kHz to limit power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% (4.8–5.25V) under 8–22V input and 0.2–3A load |
| Switching Frequency | 150 kHz ±15% (127–173 kHz); enables use of smaller 47 µH inductors and low-ESR output capacitors |
| Max Output Current | 3A continuous; limited by internal switch saturation voltage (1.4–1.7V @ 3A) and thermal design |
| Input Voltage Range | 4.5V to 22V; supports 5V, 12V, and 24V rail inputs with margin for transients |
| Efficiency | 80% typical at VIN = 12V, VOUT = 5V, IOUT = 3A; optimized for mid-power industrial loads |
| Shutdown Quiescent Current | 70–200 µA at VIN = 22V; enables low-power standby mode via logic-level SD pin |
| Feedback Reference | 1.23V internal reference; used only in adjustable versions-this part is fixed 5V, no external resistor divider required |
Pinout & Package
AP1507-D5L-U uses the TO-252-5L (DPAK-5) surface-mount package with exposed metal tab for thermal conduction. The tab is electrically connected to GND and must be soldered to ≥2 cm² of 2 oz. copper for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Positive input supply | Accepts 4.5–22V DC; requires local 100 µF low-ESR input capacitor to suppress switching transients |
| 2 Output | Internal power switch drain | Swings between ~0.5V (off) and (VIN – 1.6V) (on); connects to inductor and Schottky catch diode anode |
| 3 GND | Ground reference | Common return for internal circuitry, feedback, and shutdown; tied to exposed metal tab |
| 4 FB | Feedback input | Internally connected to 5V output divider; not accessible on fixed-output variants-pin is NC but must be left unconnected |
| 5 SD | Shutdown control | Logic-compatible input: <1.3V = ON, >2.0V = OFF; draws <1 µA; pull to GND if unused |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A power switch | Eliminates external MOSFET and gate driver, reducing BOM count and PCB area by >30% vs discrete buck designs |
| Internal compensation network | Enables stable regulation with only input/output capacitors and inductor-no external compensation components required |
| Thermal shutdown + current limit | Protects against sustained overload and ambient overheating; self-recovering after fault removal |
| ON/OFF logic control | SD pin accepts standard CMOS/TTL levels; reduces total input current to <200 µA in shutdown |
| Lead-free & green compliant | TO-252-5L package meets RoHS 2 (2011/65/EU), halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Industrial PLC Power Rails | Embedded System Core Supply |
|---|---|
|
Use Scenario: Providing regulated 5V power to microcontroller, FPGA I/O banks, and peripheral ICs on programmable logic controller mainboards. IC Role / Device Role / Timing Role: Primary non-isolated DC/DC step-down regulator converting 12V or 24V backplane to clean 5V system rail. Use Value: Delivers 3A continuous current with 80% efficiency and built-in thermal protection-reducing heatsink requirements and improving field reliability. |
Use Scenario: Powering ARM Cortex-M7-based edge computing modules requiring stable 5V at up to 2.5A with fast transient response. IC Role / Device Role / Timing Role: Fixed-output buck converter operating at 150 kHz to minimize EMI and simplify filter design near sensitive analog sections. Use Value: Internal compensation and 1.6V saturation voltage ensure tight line/load regulation (<±2%) across -20°C to +85°C ambient range. |
| Point-of-Load Telecom Module | Automotive Body Control Unit |
|
Use Scenario: Generating 5V for Ethernet PHYs, USB hubs, and management controllers in telecom access equipment with 48V input. IC Role / Device Role / Timing Role: Secondary buck stage downstream of isolated 48V-to-12V converter; handles dynamic load steps up to 2A/µs. Use Value: 150 kHz switching allows small 47 µH shielded inductor and ceramic output caps-enabling compact 15 mm × 15 mm layout footprint. |
Use Scenario: Supplying 5V to CAN transceivers, LIN interface ICs, and sensor signal conditioners in 12V automotive body electronics. IC Role / Device Role / Timing Role: Input-supervised buck regulator accepting 6–18V battery range with shutdown controlled by MCU GPIO. Use Value: Withstands cold-crank (6V) and load-dump (22V) conditions; SD pin enables MCU-controlled power sequencing and sleep-mode current reduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-5.0/NOPB | 3A, 150 kHz, fixed 5V; requires external compensation; higher quiescent current (5 mA vs 10 µA in shutdown) | Larger solution size due to external compensation network; less suitable for space-constrained layouts | Preferred when legacy LM2596 footprint compatibility is required and thermal derating margin is available |
| MP1584EN-LF-Z | 3A, 1.5 MHz, adjustable/fixed 5V; synchronous rectification; 90%+ efficiency; smaller inductor (2.2 µH) | Higher-frequency operation reduces EMI filtering burden but increases sensitivity to layout parasitics | Chosen for higher efficiency and miniaturization where board space is premium and 1.5 MHz noise can be managed |
Compared with LM2596S-5.0/NOPB, AP1507-D5L-U offers simpler layout and lower shutdown current; versus MP1584EN-LF-Z, it trades efficiency and size for robustness at lower frequency and reduced EMI susceptibility in noisy industrial environments.
Availability
AP1507-D5L-U is available at Aetrix Electronics and suitable for industrial PLC power rails, embedded system core supplies, point-of-load telecom modules, and automotive body control units requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for AP1507-D5L-U 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 high-reliability power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.
The AP1507 series belongs to Diodes' monolithic DC/DC converter product line, engineered for cost-sensitive, medium-current step-down applications where simplicity, thermal resilience, and proven field reliability outweigh ultra-high efficiency or ultra-small footprint requirements.
FAQ
What is the maximum recommended input voltage for AP1507-D5L-U?
The absolute maximum input voltage is +24V, but the recommended operating range is 4.5V to 22V per datasheet specifications. Operation at 22V is validated for full 3A output with proper thermal design; exceeding 22V risks permanent damage even briefly due to internal clamp limitations and junction temperature rise.
Can AP1507-D5L-U be used in adjustable-output configurations?
No-AP1507-D5L-U is a fixed 5.0V output variant. The FB pin is internally connected to the 5V divider and not accessible; attempting external resistor networks will not alter output voltage. For adjustable operation, select AP1507-ADJD5L-U (adjustable version) instead.
How does thermal performance depend on PCB layout?
Thermal resistance θJA drops from 50°C/W (minimal copper) to ~25°C/W with ≥2 in² (12.9 cm²) of 2 oz. copper connected to the exposed GND tab. Without adequate copper area, junction temperature exceeds +125°C at 3A/12VIN, triggering thermal shutdown. Layout must avoid large copper on the Output pin to prevent EMI coupling.
Is an external Schottky diode required, and what specifications apply?
Yes-a Schottky diode is mandatory for flyback path conduction. Diodes Incorporated recommends DFLS160 (60V, 1A) or SB560 (60V, 5A) depending on peak current. Reverse voltage rating must exceed VIN (min 24V), forward voltage ≤0.5V at 3A, and thermal mass sufficient to dissipate ~1.5W under worst-case duty cycle.
AP1507-D5L-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-6, DPAK (5 Leads + Tab)
- Packaging:
- Tube
- 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):
- 22V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 3A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-5
AP1507-D5L-U FAQ
1.How can I place an order for AP1507-D5L-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1507-D5L-U 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 AP1507-D5L-U reliable?
The price and inventory of AP1507-D5L-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1507-D5L-U is usually 5 days.
3.What payment methods are accepted for AP1507-D5L-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1507-D5L-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1507-D5L-U?
AP1507-D5L-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1507-D5L-U 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 AP1507-D5L-U?
For technical support, including AP1507-D5L-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1507-D5L-U requirements.
6.How does Aetrix verify that AP1507-D5L-U is sourced from the original manufacturer or authorized distributors?
All AP1507-D5L-U 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 AP1507-D5L-U meets industry standards.
7.What is the process for return or replacement of AP1507-D5L-U?
All AP1507-D5L-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1507-D5L-U, 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 AP1507-D5L-U part is unused and in its original packaging.
Return procedure for AP1507-D5L-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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