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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Diodes Incorporated AP1507-50D5L-U

Name: AP1507-50D5L-U
Brand: Diodes Incorporated
SKU: AP1507-50D5L-U
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP1507-50D5L-U

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: TO-252-6, DPAK (5 Leads + Tab)

Datasheet:: AP1507-50D5L-U.pdf

Description:: IC REG BUCK 5V 3A TO252-5

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Product details

Overview

AP1507-50D5L-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, and ON/OFF shutdown control. It delivers regulated 5V at up to 3A from 8–22V input, achieves 80% efficiency at 12V_IN/3A, and includes thermal shutdown and current-limit protection for industrial power rails.

For engineers reviewing the AP1507-50D5L-U datasheet, AP1507-50D5L-U pinout, AP1507-50D5L-U application, or AP1507-50D5L-U equivalent, key selection criteria include its fixed 5V output tolerance (±4%), 150 kHz switching frequency tolerance (±15%), internal compensation, and thermal performance in TO-252-5L with 50°C/W θ_JA.

Technical Context

The AP1507-50D5L-U implements voltage-mode PWM control with a built-in 1.235V reference and 150 kHz oscillator. Its feedback loop uses an internal error amplifier and compensation network, eliminating external compensation components. The device operates in continuous conduction mode with duty cycle controlled by V_FB regulation.

Protection functions include cycle-by-cycle current limiting (4.5A typical peak) and thermal shutdown (T_J > 125°C). When current limit activates and V_FB drops below 0.5V, 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% over 0.2–3A load and 8–22V input - ensures stable logic rail without external resistor divider.
Switching Frequency	150 kHz ±15% - enables use of compact 47 µH inductors and reduces EMI compared to lower-frequency buck converters.
Max Output Current	3A continuous - supports mid-power applications like FPGA I/O banks or microcontroller subsystems without external MOSFET.
Input Voltage Range	4.5V to 22V - accommodates 5V, 12V, and 24V industrial bus inputs with margin for ripple and dropout.
Efficiency	80% at V_IN = 12V, V_OUT = 5V, I_OUT = 3A - minimizes thermal load on PCB copper area in space-constrained designs.
Shutdown Quiescent Current	70–200 µA - enables low-power standby in battery-backed or energy-sensitive systems.
Thermal Resistance	θ_JA = 50°C/W (TO-252-5L, 2 cm² copper) - requires ≥2 in² 2 oz. copper pour for full 3A operation at +85°C ambient.

Pinout & Package

AP1507-50D5L-U is housed in a lead-free, RoHS-compliant TO-252-5L (DPAK) surface-mount package with exposed metal tab electrically connected to GND for thermal and electrical grounding. The package measures 6.10 mm × 6.58 mm × 2.29 mm and requires Diodes Inc. recommended pad layout AP02001.

Pin/Terminal	Circuit Role	Design Meaning
1 VIN	Positive input supply	Accepts 4.5–22V; requires local 100 µF+ low-ESR input capacitor to handle pulsed 3A switch current.
2 Output	Internal power switch drain	Swings between ~0.5V (low-side) and (VIN – 1.6V) (high-side); minimal copper area advised to reduce EMI coupling.
3 GND	Power and signal ground	Common return for IC bias, feedback, and shutdown; must connect directly to large ground plane under exposed tab.
4 FB	Feedback sense input	Monitors output via resistive divider (not used in fixed 5V version); 1.23V reference sets regulation point.
5 SD	Shutdown control	Logic-level input: <1.3V = ON, >2.0V = OFF; draws <1 µA; can be tied to GND if shutdown not required.

Key Features

Feature	Design Value
Integrated 3A power switch	Eliminates external MOSFET and gate driver, reducing BOM count and layout complexity for compact 5V supplies.
Internal compensation	Enables stable regulation with no external compensation components - simplifies design validation and reduces footprint.
Thermal shutdown + current limit	Protects against sustained overload and PCB overheating; frequency foldback during current limit prevents thermal runaway.
ON/OFF logic control	Supports system-level power sequencing and low-power sleep modes with sub-200 µA quiescent current in shutdown.
Fixed 5V output version	Guaranteed ±4% output tolerance across temperature and load - suitable for powering 5V microcontrollers, sensors, and interface ICs.

Applications

Industrial PLC I/O Module Power

Embedded Microcontroller Core Supply

Use Scenario: Providing clean 5V power to digital I/O channels in DIN-rail mounted programmable logic controllers.

IC Role / Device Role / Timing Role: Primary step-down regulator converting 24V field bus to isolated 5V logic rail.

Use Value: Delivers 3A continuously with 80% efficiency and thermal shutdown, enabling convection-cooled enclosure design without heatsinks.

Use Scenario: Generating 5V core voltage for ARM Cortex-M7-based edge gateway processors operating in fanless enclosures.

IC Role / Device Role / Timing Role: Main DC/DC converter supplying processor subsystem, peripherals, and USB PHY.

Use Value: Fixed 5V output eliminates feedback resistor errors; internal compensation accelerates layout validation for time-to-market-critical designs.

Point-of-Load Converter for FPGA Boards

Smart Sensor Node Power Management

Use Scenario: Local 5V supply for FPGA configuration and I/O banks on high-density carrier boards with tight thermal budgets.

IC Role / Device Role / Timing Role: Non-isolated buck regulator placed adjacent to FPGA BGA package.

Use Value: TO-252-5L package allows direct thermal coupling to 2 oz. copper plane, maintaining junction temperature <105°C at full 3A load.

Use Scenario: Powering ultra-low-power wireless sensor nodes with intermittent 5V actuation (e.g., solenoid drivers, display backlights).

IC Role / Device Role / Timing Role: Primary regulator enabling deep-sleep mode via SD pin control.

Use Value: 70–200 µA shutdown current extends battery life; 150 kHz switching avoids interference with 2.4 GHz RF bands.

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-5.0/NOPB	150 kHz fixed-frequency, 3A, but requires external compensation and has ±2% output tolerance.	Larger solution size due to external RC compensation network; higher board cost.	Prefer when tighter output tolerance (±2%) and adjustable versions are needed across multiple voltages.
MP1584EN-LF-Z	1.5 MHz switching, 3A, adjustable-only, no fixed 5V variant; requires external feedback resistors.	Enables smaller inductors/capacitors but increases EMI filtering complexity and layout sensitivity.	Choose for space-constrained designs where 1.5 MHz allows <10 µH inductors, accepting added design effort.

Compared with LM2596S-5.0/NOPB and MP1584EN-LF-Z, AP1507-50D5L-U offers plug-and-play 5V regulation with zero external compensation, making it optimal for rapid prototyping and cost-sensitive industrial power rails where 150 kHz EMI profile is acceptable.

Availability

AP1507-50D5L-U is available at Aetrix Electronics and suitable for industrial PLCs, embedded microcontroller power supplies, FPGA point-of-load conversion, and smart sensor node designs requiring stable component supply and long-term manufacturability.

Supply support for AP1507-50D5L-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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP1507 series belongs to Diodes' standard buck converter product line, designed specifically for cost-effective, board-space-efficient 3A step-down regulation in industrial and embedded applications where simplicity and reliability are prioritized over ultra-high frequency or digital control.

FAQ

What is the minimum input voltage required for AP1507-50D5L-U to regulate 5V output?

The AP1507-50D5L-U requires a minimum input voltage of 4.5V to maintain regulation, per its Recommended Operating Conditions. At 5V input, the internal switch saturation voltage (~1.6V) leaves insufficient headroom for stable 5V output; practical minimum is 7–8V for reliable 3A operation. Datasheet specifies 8V min for 5V version under full load.

Can AP1507-50D5L-U be used in adjustable-output configurations?

No - AP1507-50D5L-U is factory-trimmed for fixed 5.0V output only. The FB pin is internally connected to the 1.235V reference and not accessible for external resistor programming. For adjustable operation, select AP1507-ADJD5L-U or AP1507-ADJD5-U instead.

How does thermal performance change with PCB copper area?

θ_JA improves from 50°C/W (2 cm² copper) to ~35°C/W with ≥6 in² (38.7 cm²) of 2 oz. copper. However, gains diminish beyond 6 in²; doubling copper area yields only ~5°C/W improvement. Thermal relief vias under the exposed tab and double-sided copper significantly enhance heat spreading.

Is AP1507-50D5L-U compatible with ceramic output capacitors?

Yes - the AP1507's internal compensation is optimized for use with low-ESR ceramic output capacitors (e.g., 100 µF X5R/X7R). Unlike some older buck controllers, it does not require high-ESR electrolytics for stability; ceramic caps improve transient response and reduce board area.

AP1507-50D5L-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:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 4.5V

Voltage - Input (Max):: 22V

Voltage - Output (Min/Fixed):: 5V

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

AP1507-50D5L-U FAQ

1.How can I place an order for AP1507-50D5L-U through Aetrix?

Please submit a Request for Quotation (RFQ) for AP1507-50D5L-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 AP1507-50D5L-U reliable?

The price and inventory of AP1507-50D5L-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1507-50D5L-U is usually 5 days.

3.What payment methods are accepted for AP1507-50D5L-U?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1507-50D5L-U transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP1507-50D5L-U?

AP1507-50D5L-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP1507-50D5L-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 AP1507-50D5L-U?

For technical support, including AP1507-50D5L-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1507-50D5L-U requirements.

6.How does Aetrix verify that AP1507-50D5L-U is sourced from the original manufacturer or authorized distributors?

All AP1507-50D5L-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 AP1507-50D5L-U meets industry standards.

7.What is the process for return or replacement of AP1507-50D5L-U?

All AP1507-50D5L-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1507-50D5L-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 AP1507-50D5L-U part is unused and in its original packaging.

Return procedure for AP1507-50D5L-U:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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