My Inquiry
My Account
Diodes Incorporated AP1501-50T5G-U
- Part No.:
- AP1501-50T5G-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-5
- Datasheet:
-
AP1501-50T5G-U.pdf
- Description:
- IC REG BUCK 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,871
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP1501-50T5G-U from Diodes Incorporated is a fixed 5.0V, 3A non-synchronous PWM buck DC/DC converter in TO220-5(R) package, operating at 150kHz ±15%, with integrated switch, thermal shutdown, current limit, and ON/OFF control. It delivers regulated 5V output across 7–40V input range for industrial power rails and embedded system supplies.
For engineers reviewing the AP1501-50T5G-U datasheet, AP1501-50T5G-U pinout, AP1501-50T5G-U application, or AP1501-50T5G-U equivalent, key selection considerations include its 5V fixed output tolerance (±4%), 3A continuous load capability, 31°C/W junction-to-ambient thermal resistance in TO220-5(R), and compatibility with standard external catch diodes and 47µH inductors in buck topology designs.
Technical Context
The AP1501-50T5G-U implements voltage-mode PWM control with internal 1.235V reference and feedback amplifier, enabling stable regulation without external compensation. Its oscillator sets a fixed 150kHz switching frequency to minimize filter component size while balancing efficiency and EMI.
It integrates a 3A N-channel MOSFET switch, thermal shutdown (trip at +150°C), cycle-by-cycle current limiting (4.0A typ.), and logic-level ON/OFF control with 0.6V low-threshold and 2.0V high-threshold. The device operates up to 40V input and supports standby quiescent current of 250µA max.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over 0.2–3A load and -20°C to +85°C ambient |
| Switching Frequency | 150kHz ±15%; enables use of compact 47µH inductor and low-ESR output capacitor |
| Max Output Current | 3A continuous; limited by internal current sense and thermal design in TO220-5(R) |
| Input Voltage Range | 7V to 40V; supports wide industrial input rails including 12V, 24V, and 36V systems |
| Efficiency | 80% at VIN=12V, VOUT=5V, IOUT=3A; optimized for mid-load efficiency in linear-regulator replacement |
| Thermal Resistance | θJA = 31°C/W (TO220-5R); requires heatsink for >1.5A at high VIN/VOUT differentials |
| Shutdown Quiescent Current | 250µA max at VIN=40V; enables low-power standby mode via logic-level SD pin |
Pinout & Package
AP1501-50T5G-U uses the TO220-5(R) package - a 5-lead through-hole thermally enhanced variant with metal tab connected to GND. The package features RoHS-compliant, halogen- and antimony-free "Green" construction and is rated for 150°C max junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN | Positive input supply | Accepts 7–40V DC; requires local 100µF+ low-ESR input capacitor to handle pulsed switch current |
| 2: Output | Internal power switch drain | Swings between ~VIN–1.4V (ON) and ~–0.5V (OFF); connects to inductor and catch diode anode |
| 3: Gnd | Power and signal ground | Common return for VIN, FB, SD, and metal tab; must be low-impedance connection to minimize noise |
| 4: FB | Feedback input | Internally referenced to 1.23V; unused in fixed-5V version but tied internally to set output |
| 5: SD | Shutdown control | Active-low logic input; <0.6V enables regulator, >2.0V disables it; 25µA max input current |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A Power Switch | Eliminates need for external MOSFET driver; reduces BOM count and layout complexity in buck converters |
| Fixed 5.0V Output | Guaranteed ±4% accuracy across full load and temperature range; no external resistor divider required |
| Thermal Shutdown + Current Limit | Protects against sustained overload and PCB overheating; auto-recovery after fault removal |
| Logic-Level ON/OFF Control | Compatible with 3.3V/5V microcontrollers; enables system-level power sequencing and sleep mode entry |
| 150kHz Fixed Frequency | Enables predictable EMI filtering and consistent inductor sizing; avoids audible noise in most applications |
Applications
| Industrial PLC Power Supply | Embedded System Core Rail |
|---|---|
|
Use Scenario: Providing clean 5V rail for PLC I/O modules powered from 24V DC bus. IC Role / Device Role / Timing Role: Primary step-down regulator converting unregulated 24V to stable 5V for logic and interface ICs. Use Value: Delivers 3A continuous current with 80% efficiency and built-in thermal protection under variable load transients. |
Use Scenario: Generating 5V core supply for ARM-based industrial gateways operating in extended temperature environments. IC Role / Device Role / Timing Role: Non-synchronous buck controller managing power delivery to SoC, memory, and peripherals. Use Value: Supports -20°C to +85°C operation with fixed output accuracy and logic-controlled shutdown for low-power states. |
| Point-of-Load Converter | Legacy Equipment Retrofit |
|
Use Scenario: Replacing aging 7805 linear regulators on legacy PCBs where heat dissipation is constrained. IC Role / Device Role / Timing Role: High-efficiency drop-in buck replacement delivering same 5V output with lower thermal load. Use Value: Reduces board temperature rise by >40°C vs. linear regulator at 3A, enabling reuse of existing TO220 footprint. |
Use Scenario: Upgrading obsolete 5V power stages in medical diagnostic equipment requiring long-term component availability. IC Role / Device Role / Timing Role: Regulated DC/DC source powering analog front-end and digital control circuitry. Use Value: RoHS-compliant, green construction meets modern compliance requirements while maintaining mechanical compatibility. |
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 |
|---|---|---|---|
| AP1501-50K5G-13 | Same IC die, TO263-5 surface-mount package; θJA = 37°C/W; no heatsink mounting option | Better suited for space-constrained PCBs; requires larger copper pour for thermal management | Select when automated assembly and smaller footprint outweigh thermal performance needs |
| LM2576-5.0 | 150kHz fixed-frequency buck; 3A rating; external switch; requires external diode and compensation | Higher external component count; less integrated but widely supported with mature reference designs | Choose when design reuse of LM2576 ecosystem is prioritized over integration and footprint reduction |
Compared with AP1501-50K5G-13, the AP1501-50T5G-U offers superior thermal performance in forced-air or heatsink-equipped systems, while the LM2576-5.0 trades integration for broader design flexibility and longer industry support history.
Availability
AP1501-50T5G-U is available at Aetrix Electronics and suitable for industrial PLC power supplies, embedded system core rails, point-of-load converters, and legacy equipment retrofits requiring stable component supply and long-lifecycle support.
Supply support for AP1501-50T5G-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 ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP1501 product line delivers fully integrated, cost-optimized buck converters targeting high-volume industrial and embedded applications where simplicity, reliability, and thermal robustness are critical.
FAQ
Is AP1501-50T5G-U pin-compatible with other AP1501 variants?
Yes - all AP1501 versions share identical TO220-5(R) pinout (VIN, Output, GND, FB, SD). The fixed 5V version internally connects FB to the 1.23V reference, so external feedback resistors are not used. Pin compatibility enables direct substitution within the same package family, provided thermal and layout constraints are met.
What external components are required for basic operation?
A minimum of three external components: an input capacitor (≥100µF, low-ESR), a catch diode (e.g., B340A Schottky), and an inductor (47µH, ≥4A saturation current). No compensation network is needed due to internal compensation. Layout must provide low-inductance GND paths and thermal relief for the metal tab.
Can AP1501-50T5G-U operate without a heatsink?
At ≤1.5A load and VIN ≤24V with 25°C ambient and still air, the TO220-5(R) package may operate without a heatsink. However, at 3A and VIN=40V, junction temperature exceeds safe limits without heatsinking. Thermal simulation using θJA=31°C/W and expected power loss (≈3W) is recommended before final layout.
Why is AP1501-50T5G-U marked NRND?
Diodes Incorporated classifies AP1501-50T5G-U as Not Recommended for New Design (NRND) due to migration toward tape-and-reel packaging (e.g., AP1501-50K5G-13) and surface-mount adoption. Existing designs may continue using it, but new projects should evaluate TO263-5 alternatives for improved manufacturability and thermal scalability.
AP1501-50T5G-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-5
AP1501-50T5G-U FAQ
1.How can I place an order for AP1501-50T5G-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501-50T5G-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 AP1501-50T5G-U reliable?
The price and inventory of AP1501-50T5G-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1501-50T5G-U is usually 5 days.
3.What payment methods are accepted for AP1501-50T5G-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501-50T5G-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501-50T5G-U?
AP1501-50T5G-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501-50T5G-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 AP1501-50T5G-U?
For technical support, including AP1501-50T5G-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501-50T5G-U requirements.
6.How does Aetrix verify that AP1501-50T5G-U is sourced from the original manufacturer or authorized distributors?
All AP1501-50T5G-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 AP1501-50T5G-U meets industry standards.
7.What is the process for return or replacement of AP1501-50T5G-U?
All AP1501-50T5G-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1501-50T5G-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 AP1501-50T5G-U part is unused and in its original packaging.
Return procedure for AP1501-50T5G-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP1501-50T5G-U 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…
