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Diodes Incorporated AP1115AY33G-13
- Part No.:
- AP1115AY33G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115AY33G-13.pdf
- Description:
- IC REG LINEAR 3.3V 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,147
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Product details
Overview
AP1115AY33G-13 from Diodes Incorporated is a 0.6A low-dropout positive fixed-mode voltage regulator delivering a stable 3.3V output with ≤1.3V dropout at full load, 60–70dB ripple rejection at 120Hz, and thermal shutdown protection. It operates from 4.8V to 12V input and targets low-voltage IC power rails including high-speed bus termination and VGA card logic supplies.
For engineers reviewing the AP1115AY33G-13 datasheet, AP1115AY33G-13 pinout, AP1115AY33G-13 application, or AP1115AY33G-13 equivalent, key selection criteria include guaranteed 3.3V ±1% output accuracy at 10mA, 26–33mV load regulation over 0–0.6A, SOT89-3L thermal resistance (θJA = 164°C/W), and compatibility with 100µF output capacitors (ESR 0.15–20Ω).
Technical Context
The AP1115AY33G-13 implements a fixed-output linear regulation architecture with internal reference (1.25V typ), error amplifier, and PNP pass transistor. Its control loop ensures fast transient response-demonstrated by <100µs recovery in load step tests-and maintains regulation down to 5mA minimum load current.
It features built-in current limiting (≥0.7A) and thermal shutdown triggered at +150°C junction temperature. The device requires no external compensation and achieves 0.6–0.8% temperature stability over 0–125°C operating range, validated under pulsed test conditions to isolate heating effects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±1% at 10mA, 4.8–12V input; enables precise 3.3V logic rail without external resistors |
| Dropout Voltage | 1.1V typ / 1.3V max at 0.6A; allows operation with only 4.6V input for regulated 3.3V output |
| Ripple Rejection | 60–70dB at 120Hz with 25µF tantalum output cap; suppresses AC noise from upstream switching supplies |
| Load Regulation | 26–33mV over 0–0.6A load; ensures stable voltage across dynamic current demands in peripheral circuits |
| Thermal Resistance | θJA = 164°C/W (SOT89-3L, FR-4, 2oz Cu); limits junction rise to ~100°C at 0.6A with 25°C ambient |
| Quiescent Current | 5–10mA minimum load required; defines lowest usable current before regulation loss |
| Line Regulation | 0.2% max over VIN range; rejects input supply variations without affecting output accuracy |
Pinout & Package
SOT89-3L package with exposed tab (Pin 3) electrically connected to VIN; thermally enhanced for PCB heat dissipation. Pin 1 is Adj (GND), Pin 2 is VOUT, Pin 3 is VIN - matching AP1115A configuration per datasheet top-view diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: Adj (GND) | Ground reference terminal | Internal ground node; must be connected directly to system GND plane for stable regulation |
| Pin 2: VOUT | Regulated output terminal | Delivers 3.3V; requires ≥10µF capacitor (0.15–20Ω ESR) to ground for loop stability |
| Pin 3: VIN | Input supply terminal | Accepts 4.8–12V; must remain ≥1.3V above VOUT during transients; tab connection improves thermal path |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V output | Eliminates external resistor network; reduces BOM count and layout area for standard logic rail |
| Fast transient response | Sub-100µs recovery from 0.1–0.6A load steps; maintains signal integrity in burst-mode peripherals |
| Built-in thermal shutdown | Activates at +150°C junction temperature; prevents catastrophic failure during sustained overload or poor heatsinking |
| Lead-free & halogen-free | RoHS 2 compliant (2011/65/EU); Br/Cl <1500ppm total, Sb <1000ppm; meets green electronics requirements |
| Low-noise regulation | 60–70dB ripple rejection enables clean power for noise-sensitive analog interfaces on same board |
Applications
| PC Peripheral Power | VGA Card Logic Supply |
|---|---|
|
Use Scenario: Powering USB hubs, card readers, and SATA controllers requiring stable 3.3V at up to 0.6A. IC Role / Device Role / Timing Role: Primary LDO regulator supplying core logic voltage for interface ICs. Use Value: Maintains regulation during hot-plug transients and ensures compliance with USB 2.0/3.0 power sequencing specs. |
Use Scenario: Delivering 3.3V to VGA controller ASICs and level-shifting buffers on graphics add-in cards. IC Role / Device Role / Timing Role: Fixed-output voltage source for digital video timing circuitry and I²C configuration buses. Use Value: Low dropout enables use of 5V rail as input; fast transient response prevents display flicker during mode switching. |
| High-Speed Bus Termination | Industrial I/O Module Rail |
|
Use Scenario: Providing bias voltage for RS-485/RS-422 termination networks in communication backplanes. IC Role / Device Role / Timing Role: Precision voltage reference for active termination resistors in differential signaling paths. Use Value: Tight 3.3V tolerance (±1%) ensures consistent common-mode voltage and signal integrity across multi-drop buses. |
Use Scenario: Powering isolated digital I/O drivers and status LEDs in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Secondary local regulator deriving 3.3V from 5V or 12V system rail in harsh industrial environments. Use Value: Thermal shutdown and current limiting protect against field wiring faults; wide input range accommodates unregulated DC inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2112K-3.3TRG1 | 0.6A rated, 300mV typical dropout, SOT-23-5 package, higher quiescent current (60µA vs 10mA) | Lower thermal mass; unsuitable for >0.3A continuous loads without heatsinking | Select when board space is constrained and peak load <0.4A; verify θJA derating at target ambient |
| MCP1700T-3302E/TT | 250mA rated, 175mV dropout, SOT-23-3, no thermal shutdown, 1.5% output tolerance | Limited current capacity; lacks overtemperature protection for sustained fault conditions | Use only in low-power sensor nodes where 250mA suffices and thermal risk is mitigated externally |
Compared with AP1115AY33G-13, AP2112K-3.3TRG1 trades thermal robustness for footprint reduction, while MCP1700T-3302E/TT sacrifices safety features and current capability for ultra-low IQ-neither matches the 0.6A/1.3V-dropout/thermal-shutdown combination in SOT89-3L.
Availability
AP1115AY33G-13 is available at Aetrix Electronics and suitable for PC peripheral power, VGA card logic supply, and high-speed bus termination requiring stable component supply despite its obsolete status and limited remaining stock.
Supply support for AP1115AY33G-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 and manufacturing operations across Asia and the Americas.
The AP1115 series belongs to Diodes' precision linear regulator product line, engineered specifically for low-noise, low-dropout power delivery in space-constrained computing and communications hardware.
FAQ
Is AP1115AY33G-13 still in production?
No. Diodes Incorporated discontinued the AP1115 series in April 2016, as confirmed in DS31026 Rev. 6-4. AP1115AY33G-13 is obsolete with no second-source or replacement part issued by the manufacturer. Aetrix Electronics offers remaining genuine stock with full traceability.
What is the correct pin configuration for AP1115AY33G-13?
AP1115AY33G-13 uses the AP1115A pinout: Pin 1 = Adj (GND), Pin 2 = VOUT, Pin 3 = VIN. The metal tab is internally connected to VIN, not GND-this is critical for thermal and electrical layout. Confirmed via top-view diagram in DS31026 page 1.
Can AP1115AY33G-13 replace adjustable AP1115 variants?
No. AP1115AY33G-13 is factory-trimmed for fixed 3.3V output and lacks the ADJ pin functionality. Its internal feedback network is hardwired; connecting external resistors will not adjust voltage and may disrupt regulation or trigger current limiting.
What output capacitor is required for stability?
A minimum 10µF capacitor with ESR between 0.15Ω and 20Ω must be placed from VOUT to GND. Diodes recommends 100µF tantalum (as shown in typical application circuits) to ensure phase margin and dampen load transients-ceramic caps alone may cause oscillation due to low ESR.
AP1115AY33G-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 600mA
- Current - Output:
- 600mA
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
AP1115AY33G-13 FAQ
1.How can I place an order for AP1115AY33G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115AY33G-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 AP1115AY33G-13 reliable?
The price and inventory of AP1115AY33G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115AY33G-13 is usually 5 days.
3.What payment methods are accepted for AP1115AY33G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115AY33G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115AY33G-13?
AP1115AY33G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115AY33G-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 AP1115AY33G-13?
For technical support, including AP1115AY33G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115AY33G-13 requirements.
6.How does Aetrix verify that AP1115AY33G-13 is sourced from the original manufacturer or authorized distributors?
All AP1115AY33G-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 AP1115AY33G-13 meets industry standards.
7.What is the process for return or replacement of AP1115AY33G-13?
All AP1115AY33G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115AY33G-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 AP1115AY33G-13 part is unused and in its original packaging.
Return procedure for AP1115AY33G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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