My Inquiry
My Account
Diodes Incorporated AP1501-33K5G-13
- Part No.:
- AP1501-33K5G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1501-33K5G-13.pdf
- Description:
- IC REG BUCK 3.3V 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,835
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP1501-33K5G-13 from Diodes Incorporated is a fixed-output 3.3V, 3A non-synchronous PWM buck DC/DC converter with 150kHz switching frequency, integrated power switch, thermal shutdown, and current-limit protection. It operates from 4.75V to 40V input, delivers ±4% output voltage tolerance at full load, and uses TO263-5 package for high-power density in industrial power rails.
For engineers reviewing the AP1501-33K5G-13 datasheet, AP1501-33K5G-13 pinout, AP1501-33K5G-13 application, or AP1501-33K5G-13 equivalent, key selection criteria include its fixed 3.3V output, 3A continuous load capability, 150kHz oscillator tolerance (±15%), ON/OFF logic control interface, and thermal performance in TO263-5 with θJA = 37°C/W under standard PCB layout.
Technical Context
The AP1501-33K5G-13 implements voltage-mode PWM control with internal 1.23V reference and compensation network, eliminating external loop components. Its non-synchronous architecture relies on an external Schottky catch diode (e.g., B340A) and requires only three external passive components: input capacitor, output capacitor, and power inductor.
It integrates a 3A DMOS power switch with 1.4V typical saturation voltage at full load, thermal shutdown triggered at TJ ≥ 150°C, and peak current limit of 4.0A (typ). The SD pin accepts logic-level shutdown (VIH ≥ 2.0V, VIL ≤ 0.6V), enabling low-quiescent standby mode (ISTBY = 250µA max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±4% over 0.2–3A load and 4.75–40V input - ensures stable core logic rail without feedback resistor tuning. |
| Switching Frequency | 150kHz ±15% - enables use of compact 33µH inductors and reduces EMI compared to higher-frequency alternatives. |
| Max Output Current | 3A continuous - supports single-rail conversion for microcontrollers, FPGAs, and peripheral ICs without external driver stages. |
| Input Voltage Range | 4.75V to 40V - accommodates wide-input industrial supplies including 12V, 24V, and 36V battery or adapter sources. |
| Efficiency | 73% at VIN=12V, IOUT=3A - balances thermal dissipation and board area vs. synchronous converters requiring dual MOSFETs. |
| Shutdown Quiescent Current | 250µA max at VIN=40V - enables low-power system sleep modes while retaining fast wake-up response. |
| Thermal Resistance | θJA = 37°C/W (TO263-5, 3in² copper) - defines minimum PCB copper area required to maintain TJ < 125°C at full load. |
Pinout & Package
AP1501-33K5G-13 is housed in a thermally enhanced TO263-5 surface-mount package with exposed metal tab connected to GND for heatsinking. The 5-pin top-view layout places VIN (1), Output (2), GND (3), FB (4), and SD (5); the metal tab serves as additional GND connection and primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Positive input supply | Accepts 4.75–40V DC; requires local ceramic bypass capacitor to handle high di/dt switching currents. |
| Output (Pin 2) | Internal power switch drain | Swings between ~0.5V (OFF) and VIN–1.4V (ON); connects directly to inductor and catch diode anode. |
| GND (Pin 3) | Power and signal ground | Reference for all internal circuits; must be tied to large copper pour and metal tab for thermal and noise control. |
| FB (Pin 4) | Feedback input | Monitors output via resistive divider (not used in fixed 3.3V version); internally tied to 1.23V reference. |
| SD (Pin 5) | Shutdown control | Logic-compatible input: ≤0.6V = ON, ≥2.0V = OFF; pulls regulator into 250µA standby state when high. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A power switch | Eliminates need for external MOSFET driver and gate resistor, reducing BOM count and layout complexity. |
| Internal compensation network | Enables stable regulation with no external compensation components-reduces design iteration time and footprint. |
| Thermal shutdown + current limit | Protects against sustained overload or poor heatsinking by disabling switching before junction exceeds 150°C or current hits 4A. |
| Logic-level ON/OFF control | Direct interface with MCU GPIO or system PMIC without level-shifting, supporting coordinated power sequencing. |
| TO263-5 thermally optimized package | Exposed GND tab soldered to PCB copper acts as primary heatsink-no separate heatsink required for ≤2A loads in still air. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Powering 3.3V microcontroller, CAN transceiver, and analog sensor interface in DIN-rail mounted PLC. IC Role / Device Role / Timing Role: Primary 3.3V step-down regulator converting 24V bus to logic rail; provides regulated supply independent of input ripple or load transients. Use Value: Delivers 3A continuously with 73% efficiency at 12V input, minimizing heat buildup in enclosed enclosures without forced airflow. |
Use Scenario: Generating 3.3V supply for automotive infotainment MCU and memory subsystem from 12V battery rail. IC Role / Device Role / Timing Role: Non-synchronous buck converter handling cold-crank (6.5V) to load-dump (40V) conditions with built-in overvoltage and thermal protection. Use Value: Withstands 40V absolute max input and includes shutdown control for ignition-synchronized power gating, meeting ISO 7637-2 pulse immunity requirements. |
| Point-of-Load Telecom Board | Medical Diagnostic Sensor Hub |
|
Use Scenario: Local 3.3V regulation for FPGA configuration and SerDes PHY on telecom line card with shared 12V backplane. IC Role / Device Role / Timing Role: Compact, low-noise buck stage placed near load to minimize IR drop and improve transient response. Use Value: TO263-5 package allows direct mounting adjacent to FPGA BGA, achieving <10mV output ripple with standard 33µH/220µF LC filter. |
Use Scenario: Powering precision ADC, temperature sensor array, and low-power wireless MCU in portable diagnostic device. IC Role / Device Role / Timing Role: Primary DC/DC regulator supplying clean 3.3V rail with low quiescent current during sleep cycles. Use Value: 250µA standby current extends battery life; ±4% output tolerance ensures consistent ADC reference accuracy across temperature and load. |
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-3.3/NOPB | 3.3V fixed, 3A, 150kHz, TO263-5 - identical switching frequency and package but requires external compensation and has wider VOUT tolerance (±5%). | Lacks integrated thermal shutdown; relies on external thermal pad monitoring or system-level protection. | Prefer AP1501-33K5G-13 where internal protection and guaranteed ±4% tolerance are required for safety-critical or high-reliability designs. |
| MP1584EN-LF-Z | 3.3V fixed, 4A, 1.5MHz, SOIC-8 - higher frequency enables smaller magnetics but increases EMI sensitivity and reduces efficiency at 3A load (≈68% @12V→3.3V). | SOIC-8 package offers lower thermal performance (θJA ≈ 60°C/W) - requires careful layout or derating for 3A continuous operation. | Choose AP1501-33K5G-13 for thermally constrained industrial boards needing proven 3A capability without complex layout optimization. |
Compared with LM2596S-3.3/NOPB and MP1584EN-LF-Z, AP1501-33K5G-13 provides tighter output regulation, integrated thermal/current protection, and superior thermal management in TO263-5 - making it optimal for ruggedized, long-lifecycle industrial power rails where reliability outweighs ultra-compact size.
Availability
AP1501-33K5G-13 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, and medical sensor hubs requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AP1501-33K5G-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, specializing in power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.
The AP1501 series belongs to Diodes' high-current DC/DC converter product line, designed specifically for cost-sensitive, thermally demanding applications where integration, reliability, and ease of design outweigh the need for synchronous efficiency gains.
FAQ
What is the maximum input voltage the AP1501-33K5G-13 can withstand?
The AP1501-33K5G-13 has an absolute maximum input voltage rating of +45V, with recommended operating range up to 40V. It maintains regulation and protection functions across this range, including during automotive load-dump events. Exceeding 45V risks permanent damage to the internal power switch and control circuitry.
Does the AP1501-33K5G-13 require external compensation components?
No. The AP1501-33K5G-13 features fully internal compensation, meaning no external capacitors or resistors are needed for loop stability. This simplifies design, reduces bill-of-materials count, and eliminates tuning iterations - confirmed in the functional block diagram and electrical characteristics section of DS31014 Rev. 14-2.
Can the AP1501-33K5G-13 be used with a synchronous rectifier?
No. The AP1501-33K5G-13 is a non-synchronous buck controller with a single internal N-channel DMOS switch; it requires an external Schottky catch diode (e.g., B340A) on the output node. It lacks gate drive outputs or timing control for a synchronous MOSFET, and substituting one would cause shoot-through or improper conduction timing.
Is the AP1501-33K5G-13 qualified for automotive applications?
The AP1501-33K5G-13 itself is not AEC-Q100 qualified; Diodes states that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing - which this part does not carry per ordering information (NRND status, no AEC suffix). For automotive use, contact Diodes directly for qualified alternatives.
AP1501-33K5G-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- 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):
- 40V
- 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-263-5
AP1501-33K5G-13 FAQ
1.How can I place an order for AP1501-33K5G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501-33K5G-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 AP1501-33K5G-13 reliable?
The price and inventory of AP1501-33K5G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1501-33K5G-13 is usually 5 days.
3.What payment methods are accepted for AP1501-33K5G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501-33K5G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501-33K5G-13?
AP1501-33K5G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501-33K5G-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 AP1501-33K5G-13?
For technical support, including AP1501-33K5G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501-33K5G-13 requirements.
6.How does Aetrix verify that AP1501-33K5G-13 is sourced from the original manufacturer or authorized distributors?
All AP1501-33K5G-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 AP1501-33K5G-13 meets industry standards.
7.What is the process for return or replacement of AP1501-33K5G-13?
All AP1501-33K5G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1501-33K5G-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 AP1501-33K5G-13 part is unused and in its original packaging.
Return procedure for AP1501-33K5G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP1501-33K5G-13 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…
