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Diodes Incorporated AP1115BY33G-13
- Part No.:
- AP1115BY33G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115BY33G-13.pdf
- Description:
- IC REG LINEAR 3.3V 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,652
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Product details
Overview
AP1115BY33G-13 from Diodes Incorporated is a 0.6A low-dropout positive fixed-mode voltage regulator delivering 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-current 3.3V logic supply and high-speed bus termination in PC peripherals and VGA cards.
For engineers reviewing the AP1115BY33G-13 datasheet, AP1115BY33G-13 pinout, AP1115BY33G-13 application, or AP1115BY33G-13 equivalent, key selection criteria include guaranteed 3.3V ±1% output accuracy at 10mA, 26–33mV load regulation across 0–0.6A, SOT89-3L package thermal resistance (θJA = 164°C/W), and compatibility with 0.15–20Ω ESR output capacitors.
Technical Context
The AP1115BY33G-13 implements a fixed-output LDO architecture with internal reference (1.25V typ), PNP pass transistor, and integrated current limiting and thermal shutdown circuitry. Its fast transient response is enabled by low output impedance and optimized internal compensation.
It requires no external feedback resistors-output is factory-set to 3.3V-and mandates ≥10µF output capacitance with ESR between 0.15Ω and 20Ω for stability. Input must remain ≥1.3V above VOUT under all operating conditions to maintain regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±1% at 10mA (ensures stable 3.3V logic rail within JEDEC tolerance) |
| Max Dropout Voltage | 1.3V at 0.6A load (enables regulation from 4.8V input down to 3.3V output) |
| Ripple Rejection | 60–70dB at 120Hz with 25µF tantalum output cap (suppresses AC noise on supply rail) |
| Load Regulation | 26–33mV over 0–0.6A (limits output shift during dynamic current draw) |
| Thermal Resistance θJA | 164°C/W (no heatsink; FR-4, 2oz Cu; defines max power dissipation before thermal shutdown) |
| Output Capacitor ESR Range | 0.15Ω to 20Ω (critical for phase margin and transient stability) |
| Quiescent Current | 5–10mA minimum load required (prevents regulation loss at light loads) |
Pinout & Package
SOT89-3L package: 3-pin surface-mount, lead-free and halogen-free "Green" compound, tab connected to VIN (Pin 2 per AP1115B configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: Adj (GND) | Ground reference / adjust node | Internally tied to GND for fixed 3.3V mode; unused externally but must be connected to system ground |
| Pin 2: VIN | Regulator input | Accepts 4.8–12V DC; must be ≥1.3V above VOUT; connects to thermal pad for heat dissipation |
| Pin 3: VOUT | Regulated output | Delivers 3.3V ±1%; requires ≥10µF capacitor (0.15–20Ω ESR) to ground for stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V output | No external resistor network needed-reduces BOM count and layout area |
| Built-in thermal shutdown | Triggers at TJ = +150°C to prevent damage during overload or poor heatsinking |
| Current limiting | Guaranteed >0.7A foldback limit protects against short-circuit faults |
| Fast transient response | Sub-100µs recovery from 100mA ↔ 600mA load steps (per typical performance curves) |
| Low-noise operation | 60–70dB ripple rejection enables clean supply for noise-sensitive analog/RF circuits |
Applications
| PC Peripheral Power | VGA Card Logic Supply |
|---|---|
Use Scenario: Providing regulated 3.3V to USB controller ICs, SATA bridge chips, and PCIe endpoint logic in add-in cards and docking stations. IC Role / Device Role / Timing Role: Primary local LDO supplying core logic voltage; replaces switching converter where low noise and simplicity are prioritized. Use Value: Eliminates need for external feedback components and reduces EMI vs. switching regulators-critical in compact peripheral enclosures. |
Use Scenario: Delivering stable 3.3V to GPU interface buffers, memory controllers, and display timing ICs on discrete graphics cards. IC Role / Device Role / Timing Role: Point-of-load regulator for high-speed digital interfaces (e.g., TMDS, DVI, LVDS transmitters) requiring low ripple and fast load step response. Use Value: Maintains <±1% output accuracy across temperature and load, ensuring signal integrity in video data paths up to 165MHz. |
| High-Speed Bus Termination | Low-Power Embedded Logic Rail |
Use Scenario: Biasing parallel termination networks for PCI Express, DDR memory buses, or legacy PCI slots requiring precise 3.3V reference. IC Role / Device Role / Timing Role: Precision voltage source for active termination resistors-directly sets termination voltage level and stability. Use Value: 26–33mV load regulation ensures termination voltage stays within ±1% across full 0–0.6A current range, minimizing signal reflection. |
Use Scenario: Powering microcontroller I/O banks, sensor interface ASICs, and low-power FPGA configuration logic in industrial control modules. IC Role / Device Role / Timing Role: Standby-capable LDO supplying always-on logic domains with minimal quiescent current impact. Use Value: Operates reliably down to 5mA minimum load-supports partial-sleep modes without regulation loss or brownout. |
Availability
AP1115BY33G-13 is available at Aetrix Electronics and suitable for PC peripheral design, VGA card manufacturing, high-speed bus termination, and low-power embedded logic rail applications requiring stable component supply despite end-of-life status.
Supply support for AP1115BY33G-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, computing, and consumer markets.
The AP1115 series belongs to Diodes' precision LDO regulator product line, engineered for low-noise, low-dropout operation in space-constrained board-level applications demanding tight output tolerance and robust thermal behavior.
FAQ
Is AP1115BY33G-13 still in production?
No-AP1115BY33G-13 is officially obsolete and discontinued by Diodes Incorporated as of April 2016. Aetrix Electronics maintains limited legacy stock with full traceability and offers lifecycle coordination support for existing designs transitioning to alternatives.
What is the correct pinout configuration for AP1115BY33G-13?
AP1115BY33G-13 uses the AP1115B pinout: Pin 1 = Adj (GND), Pin 2 = VIN (connected to thermal tab), Pin 3 = VOUT. This differs from AP1115A (Pin 1 = VOUT, Pin 2 = Adj/GND, Pin 3 = VIN); using incorrect PCB layout causes functional failure.
Can AP1115BY33G-13 replace AP1117-3.3?
No-AP1115BY33G-13 is not a drop-in replacement for AP1117-3.3. It has higher dropout (1.3V vs. 1.15V), different pinout (B vs. A), and stricter ESR requirements (0.15–20Ω vs. 15–100mΩ). Layout and capacitor selection must be revalidated.
What output capacitor is required for stability?
A minimum 10µF tantalum or aluminum electrolytic capacitor with ESR between 0.15Ω and 20Ω must be placed directly between VOUT and GND. Ceramic capacitors alone are insufficient due to near-zero ESR causing phase-margin loss and potential oscillation.
AP1115BY33G-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
AP1115BY33G-13 FAQ
1.How can I place an order for AP1115BY33G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115BY33G-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 AP1115BY33G-13 reliable?
The price and inventory of AP1115BY33G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115BY33G-13 is usually 5 days.
3.What payment methods are accepted for AP1115BY33G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115BY33G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115BY33G-13?
AP1115BY33G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115BY33G-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 AP1115BY33G-13?
For technical support, including AP1115BY33G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115BY33G-13 requirements.
6.How does Aetrix verify that AP1115BY33G-13 is sourced from the original manufacturer or authorized distributors?
All AP1115BY33G-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 AP1115BY33G-13 meets industry standards.
7.What is the process for return or replacement of AP1115BY33G-13?
All AP1115BY33G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115BY33G-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 AP1115BY33G-13 part is unused and in its original packaging.
Return procedure for AP1115BY33G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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