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Diodes Incorporated AP1507-33D5-13
- Part No.:
- AP1507-33D5-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-6, DPAK (5 Leads + Tab)
- Datasheet:
-
AP1507-33D5-13.pdf
- Description:
- IC REG BUCK 3.3V 3A TO252-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,234
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Product details
Overview
AP1507-33D5-13 from Diodes Incorporated is a monolithic 150 kHz, 3A non-synchronous PWM buck DC/DC converter with fixed 3.3 V output, integrated power switch, thermal shutdown, and current-limit protection. It operates from 4.5 V to 22 V input, delivers ±4% output voltage accuracy at 3 A load, and uses a TO252-5 package for high-power density in industrial and embedded power supplies.
For engineers reviewing the AP1507-33D5-13 datasheet, AP1507-33D5-13 pinout, AP1507-33D5-13 application, or AP1507-33D5-13 equivalent, key selection criteria include its fixed 3.3 V output, 150 kHz switching frequency, internal compensation, ON/OFF shutdown control, and thermal protection behavior under sustained 3 A load conditions.
Technical Context
The AP1507-33D5-13 implements voltage-mode PWM control with a built-in 1.235 V reference and internal error amplifier. Its oscillator runs at 150 kHz ±15%, enabling compact LC filter design using standard 47 µH inductors and low-ESR output capacitors.
It features cycle-by-cycle current limiting that reduces switching frequency when feedback voltage drops below 0.5 V, plus thermal shutdown triggered above +125 °C junction temperature. The device requires no external compensation components due to fully integrated loop compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±4% (3.168–3.465 V) across 0.2–3 A load and 5.5–22 V input |
| Switching Frequency | 150 kHz ±15% - enables use of small 47 µH inductors and reduces EMI filtering burden |
| Max Output Current | 3 A continuous - supported by internal MOSFET with 1.4–1.6 V saturation voltage at 3 A |
| Input Voltage Range | 4.5 V to 22 V - compatible with 5 V, 12 V, and 24 V rail systems without pre-regulation |
| Efficiency | 75% typical at 12 VIN/3.3 VOUT/3 A - optimized for mid-power industrial point-of-load conversion |
| Shutdown Quiescent Current | 70–150 µA - enables low-power standby mode via logic-level SD pin control |
| Thermal Protection | Activates at TJ ≥ +125 °C - prevents permanent damage during overload or poor heatsinking |
Pinout & Package
AP1507-33D5-13 is housed in a TO252-5 (DPAK-5) green, lead-free surface-mount package with an exposed metal tab thermally connected to GND. The tab must be soldered to ≥0.8 in² PCB copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Positive input supply | Accepts 4.5–22 V; requires local ceramic bypass capacitor to handle high di/dt switching currents |
| 2 Output | Internal power switch drain | Swings between ~0 V and (VIN – VSAT); minimal copper area recommended to reduce EMI coupling |
| 3 GND | Power and signal ground | Common return for internal circuitry, feedback, and shutdown; connects to exposed metal tab |
| 4 FB | Feedback input | Monitors output via resistor divider; regulates to 1.23 V reference; no external compensation needed |
| 5 SD | Shutdown control | Logic-compatible input: <1.3 V = ON, >2.0 V = OFF; pulls total supply current to ≤150 µA in shutdown |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3 A power switch | Eliminates need for external MOSFET and gate driver, reducing BOM count and layout complexity |
| Internal compensation network | Enables stable regulation with only VIN, FB, and output capacitors-no external RC networks required |
| Current-limit foldback on fault | Reduces switching frequency when overcurrent occurs, lowering power dissipation during short-circuit events |
| Thermal shutdown with hysteresis | Shuts down at +125 °C and restarts after cooling to ~+110 °C, preventing thermal runaway in enclosed environments |
| ON/OFF logic-level control | Supports direct interface with microcontroller GPIO or system power sequencer without level-shifting |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Powering 3.3 V microcontrollers, CAN transceivers, and sensor interfaces in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary step-down regulator converting 12–24 V vehicle or factory bus to clean, regulated 3.3 V for digital logic rails. Use Value: Delivers 3 A at 75% efficiency with integrated thermal protection-reducing need for heatsinks in space-constrained enclosures. |
Use Scenario: Supplying 3.3 V to automotive-grade MCUs and LIN transceivers in door modules, seat controllers, and lighting ECUs. IC Role / Device Role / Timing Role: Non-isolated buck converter operating from 9–16 V battery rail with robust line/load regulation and fault recovery. Use Value: Withstand load dump transients up to 24 V input and maintain regulation during cold-crank (4.5 V min), meeting ISO 16750-2 requirements. |
| Point-of-Load Converters in Networking Gear | Medical Diagnostic Instrumentation |
|
Use Scenario: Generating 3.3 V for FPGA configuration, Ethernet PHYs, and memory interfaces in enterprise switches and routers. IC Role / Device Role / Timing Role: High-current, low-noise local regulator placed near ICs to minimize IR drop and improve signal integrity. Use Value: 150 kHz fixed-frequency operation simplifies EMI filter design while supporting fast transient response for burst-mode traffic loads. |
Use Scenario: Providing isolated 3.3 V bias for analog front-end ADCs, op-amps, and microcontroller peripherals in portable ultrasound and patient monitors. IC Role / Device Role / Timing Role: Secondary-stage regulator downstream of isolated DC/DC, delivering low-noise, tightly regulated supply for precision analog circuits. Use Value: ±4% output tolerance and <±10 mV load regulation ensure consistent ADC reference stability across full 0–3 A load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1584EN-LF-Z (Monolithic Power) | 1.5 MHz switching frequency, adjustable output, higher quiescent current (2.5 mA vs. 10 mA active) | Better suited for ultra-compact designs requiring smaller inductors; lacks fixed 3.3 V option | Select when board space is constrained and adjustable output is acceptable; verify EMI compliance at 1.5 MHz |
| LM2596S-3.3 (Texas Instruments) | 150 kHz frequency, 3 A rating, but requires external compensation and has looser output tolerance (±4% typical, ±5% max) | Higher BOM count and layout sensitivity; widely available but less integrated than AP1507 | Choose for legacy compatibility or where TI qualification documentation is mandated; expect longer design cycle for loop tuning |
Compared with MP1584EN-LF-Z and LM2596S-3.3, the AP1507-33D5-13 offers plug-and-play fixed-output operation with no external compensation, tighter output tolerance, and lower active quiescent current-making it optimal for cost-sensitive, medium-power industrial converters where layout simplicity and thermal reliability are prioritized over ultra-high switching frequency.
Availability
AP1507-33D5-13 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body electronics, networking equipment, and medical instrumentation requiring stable component supply and long-term production continuity.
Supply support for AP1507-33D5-13 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The AP1507 series belongs to Diodes' power management portfolio, designed specifically for cost-effective, high-reliability DC/DC conversion in industrial, automotive, and consumer applications where integration, thermal robustness, and ease of use are critical.
FAQ
What is the minimum input voltage required for AP1507-33D5-13 to regulate 3.3 V output?
The AP1507-33D5-13 requires a minimum input voltage of 4.5 V to maintain regulation at full 3 A load, per its Recommended Operating Conditions. Below this threshold, dropout occurs and output voltage collapses proportionally to input-no brown-out reset or undervoltage lockout is implemented.
Can AP1507-33D5-13 be used without an external Schottky diode?
No-the AP1507-33D5-13 is a non-synchronous buck converter and requires an external Schottky catch diode (e.g., SB560 or equivalent) connected between the Output and GND pins. The internal switch does not integrate a synchronous rectifier, so omission of the diode will cause catastrophic failure.
How does the current-limit protection behave during sustained overload?
When output current exceeds ~4.5 A (typical peak limit), the AP1507-33D5-13 enters current-limit mode and reduces switching frequency from 150 kHz to 10–50 kHz. This foldback action lowers average power dissipation, allowing temporary overload survival-but thermal shutdown activates if junction temperature exceeds +125 °C.
Is AP1507-33D5-13 qualified for automotive applications per AEC-Q100?
No-the AP1507-33D5-13 is not AEC-Q100 qualified. Diodes Incorporated explicitly states that automotive-grade versions require separate qualification, PPAP capability, and IATF 16949 manufacturing; this part is intended for industrial and commercial use only.
AP1507-33D5-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-6, DPAK (5 Leads + Tab)
- 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):
- 4.5V
- Voltage - Input (Max):
- 22V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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
AP1507-33D5-13 FAQ
1.How can I place an order for AP1507-33D5-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1507-33D5-13 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 AP1507-33D5-13 reliable?
The price and inventory of AP1507-33D5-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1507-33D5-13 is usually 5 days.
3.What payment methods are accepted for AP1507-33D5-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1507-33D5-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1507-33D5-13?
AP1507-33D5-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1507-33D5-13 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 AP1507-33D5-13?
For technical support, including AP1507-33D5-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1507-33D5-13 requirements.
6.How does Aetrix verify that AP1507-33D5-13 is sourced from the original manufacturer or authorized distributors?
All AP1507-33D5-13 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 AP1507-33D5-13 meets industry standards.
7.What is the process for return or replacement of AP1507-33D5-13?
All AP1507-33D5-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1507-33D5-13, 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 AP1507-33D5-13 part is unused and in its original packaging.
Return procedure for AP1507-33D5-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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