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Diodes Incorporated AP1501A-33K5L-13
- Part No.:
- AP1501A-33K5L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- -
- Datasheet:
-
AP1501A-33K5L-13.pdf
- Description:
- IC REG BUCK 3.3V 5A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:800
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Product details
Overview
AP1501A-33K5L-13 from Diodes Incorporated is a fixed-output 3.3V, 5A non-synchronous PWM buck DC/DC converter IC in TO263-5 package, operating at 150kHz switching frequency with ±4% output voltage tolerance, thermal shutdown and current-limit protection, and logic-controlled ON/OFF shutdown - used in high-efficiency on-card step-down regulators for industrial power supplies.
For engineers reviewing the AP1501A-33K5L-13 datasheet, AP1501A-33K5L-13 pinout, AP1501A-33K5L-13 application, or AP1501A-33K5L-13 equivalent, key selection criteria include its integrated 5A switch, 4.5–40V input range, 3.3V ±4% output accuracy, TO263-5 thermal performance (θJA = 37°C/W), and feedback pin bias current of 40–60nA under adjustable-mode conditions.
Technical Context
The AP1501A-33K5L-13 implements voltage-mode PWM control with an internal 1.23V reference and fixed 150kHz oscillator (±15%), enabling stable regulation without external compensation components. Its non-synchronous architecture uses an internal N-channel MOSFET switch and requires an external Schottky catch diode.
It integrates thermal shutdown triggered above +125°C junction temperature and cycle-by-cycle current limiting at 5.5–6.5A peak, with shutdown controlled via the SD pin (logic-low = ON, logic-high ≥2.0V = OFF). The FB pin is unused in fixed 3.3V versions but internally tied to the error amplifier for regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±4% (3.168–3.432V) across 0.2–5A load and 5.5–40V input |
| Switching Frequency | 150kHz ±15% - enables compact 18µH inductor and low-ESR output capacitor selection |
| Max Output Current | 5A DC - delivered via integrated N-MOSFET switch with 1.5–1.6V saturation voltage at 5A |
| Input Voltage Range | 4.5V to 40V - supports wide-input industrial and automotive battery-supplied systems |
| Efficiency | 71% typical at VIN=12V, VOUT=3.3V, IOUT=5A - optimized for mid-power buck conversion |
| Shutdown Quiescent Current | 150–250µA at VIN=40V, SD=5V - enables ultra-low-power standby in battery-backed systems |
| Thermal Protection | Junction shutdown at +125°C - prevents permanent damage during overload or poor heatsinking |
Pinout & Package
AP1501A-33K5L-13 is housed in a thermally enhanced TO263-5 (D²PAK) surface-mount package with exposed metal tab electrically connected to GND. The tab must be soldered to ≥0.8 in² PCB copper area for effective heat dissipation (θJA = 37°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power input | Accepts 4.5–40V DC; requires local 100µF+ low-ESR input capacitor to handle pulsed switch current |
| 2 - Output | Switch node | Drives external Schottky diode and LC filter; voltage swings between (VIN – 1.6V) and ~–0.5V |
| 3 - GND | Ground reference | Common return for power, feedback, and shutdown; connects to exposed tab for thermal path |
| 4 - FB | Feedback input | Internally tied to 3.3V divider; not user-accessible in fixed-output version |
| 5 - SD | Shutdown control | Logic-compatible input: <1.3V = ON, >2.0V = OFF; sinks ≤25µA when pulled high |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A Power Switch | Eliminates external MOSFET, reducing BOM count and layout complexity in 3.3V/5A designs |
| Internal Compensation | Enables stable regulation with no external compensation network - simplifies design validation |
| Logic-Level Shutdown | SD pin accepts standard 3.3V/5V logic signals, enabling microcontroller-controlled power sequencing |
| Robust Protection Suite | Combines thermal shutdown, cycle-by-cycle current limit, and undervoltage lockout (4.5V min) |
| Lead-Free & Green Compliance | Meets RoHS 3 (2015/863/EU), halogen-free (<900ppm Br/Cl, <1000ppm Sb), and IATF 16949 manufacturing |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Provides clean 3.3V rail for microcontrollers and CAN transceivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24V DC bus to isolated 3.3V logic supply. Use Value: Delivers 5A continuous current with 71% efficiency at 12V input, minimizing thermal stress in enclosed enclosures. |
Use Scenario: Powers 3.3V domain in vehicle body electronics including door modules and lighting controllers. IC Role / Device Role / Timing Role: Input-stage buck converter accepting 9–16V battery input and rejecting load-dump transients up to 40V. Use Value: Withstands automotive cold-crank (4.5V min) and load-dump (40V max), ensuring system uptime during battery fluctuations. |
| Point-of-Load Telecom Board | Medical Diagnostic Equipment |
|
Use Scenario: Generates 3.3V for FPGA I/O banks and ADC drivers on high-density telecom line cards. IC Role / Device Role / Timing Role: Compact, high-current POL regulator placed adjacent to load to minimize IR drop and noise coupling. Use Value: TO263-5 package with GND-tab soldering enables 37°C/W θJA, supporting 5A loads without external heatsink in still-air environments. |
Use Scenario: Supplies regulated 3.3V to patient-monitoring sensors and low-power microcontrollers in portable diagnostic tools. IC Role / Device Role / Timing Role: Safety-isolated secondary-side regulator after AC/DC front-end, delivering low-noise, low-quiescent power. Use Value: 150µA standby current extends battery life; ±4% output tolerance ensures sensor ADC reference stability. |
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-3.3/NOPB | 3.3V fixed, 3A rated, 150kHz, TO263-5 - lower current rating, no SD pin, higher dropout | Suitable only for ≤3A loads; lacks logic shutdown and tighter output tolerance (±2%) | Select if cost-sensitive and load current ≤3A; avoid for 5A thermal or sequencing-critical designs |
| MP1584EN-LF-Z | 3.3V adjustable (via FB), 4A, 1.5MHz, SOIC-8 - higher frequency, smaller passives, no integrated switch thermal pad | Requires external feedback resistors; limited thermal performance (θJA ≈ 60°C/W) at 4A | Prefer for space-constrained boards needing 1.5MHz operation; not drop-in for 5A/TO263 thermal requirements |
Compared with LM2596S-3.3/NOPB and MP1584EN-LF-Z, AP1501A-33K5L-13 uniquely delivers 5A continuous current in TO263-5 with integrated thermal pad, logic shutdown, and guaranteed 3.3V ±4% accuracy - making it optimal for industrial 24V-to-3.3V conversion where reliability and thermal headroom are critical.
Availability
AP1501A-33K5L-13 is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, point-of-load telecom boards, and medical diagnostic equipment requiring stable component supply and long-term manufacturability.
Supply support for AP1501A-33K5L-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for industrial, automotive, computing, and consumer markets.
The AP1501A series belongs to Diodes' high-current monolithic buck converter product line, designed specifically for cost-sensitive, thermally demanding 3.3V/5V/12V step-down applications where external MOSFETs and compensation networks must be eliminated.
FAQ
What is the maximum recommended input voltage for AP1501A-33K5L-13?
The absolute maximum input voltage is +45V, but the recommended operating range is 4.5V to 40V. Operation above 40V risks exceeding internal transistor breakdown limits and reduces long-term reliability - sustained use at 40V requires careful thermal design due to increased power dissipation.
Can AP1501A-33K5L-13 be used in adjustable-output configurations?
No - AP1501A-33K5L-13 is factory-trimmed for fixed 3.3V output. The FB pin is internally connected and not accessible; attempting external feedback will not alter regulation. For adjustable operation, select AP1501A-K5G-13 (ADJ version) instead.
Is the metal tab on the TO263-5 package electrically isolated?
No - the metal tab is internally connected to Pin 3 (GND) and must be soldered to a GND plane. Using it as a thermal path without electrical connection violates the device's internal construction and may cause short circuits or thermal runaway.
Does AP1501A-33K5L-13 require an external Schottky diode?
Yes - it is a non-synchronous buck controller with an integrated high-side switch only. A Schottky diode (e.g., SB560, 60V/5A) must be placed between Output and GND to provide the freewheeling path; omission causes catastrophic failure during switch-off transitions.
AP1501A-33K5L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AP1501A-33K5L-13 FAQ
1.How can I place an order for AP1501A-33K5L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501A-33K5L-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 AP1501A-33K5L-13 reliable?
The price and inventory of AP1501A-33K5L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1501A-33K5L-13 is usually 5 days.
3.What payment methods are accepted for AP1501A-33K5L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501A-33K5L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501A-33K5L-13?
AP1501A-33K5L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501A-33K5L-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 AP1501A-33K5L-13?
For technical support, including AP1501A-33K5L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501A-33K5L-13 requirements.
6.How does Aetrix verify that AP1501A-33K5L-13 is sourced from the original manufacturer or authorized distributors?
All AP1501A-33K5L-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 AP1501A-33K5L-13 meets industry standards.
7.What is the process for return or replacement of AP1501A-33K5L-13?
All AP1501A-33K5L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1501A-33K5L-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 AP1501A-33K5L-13 part is unused and in its original packaging.
Return procedure for AP1501A-33K5L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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