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Diodes Incorporated AP1118D15L-13
- Part No.:
- AP1118D15L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-6, DPAK (5 Leads + Tab)
- Datasheet:
-
AP1118D15L-13.pdf
- Description:
- IC REG LINEAR 1.5V 1A TO252-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,982
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Product details
Overview
AP1118D15L-13 from Anachip Corp. is a 1A positive low-dropout linear regulator with fixed 1.5V output, TTL/CMOS-compatible enable function, and 1.4V maximum dropout at full load. It delivers stable voltage for low-voltage ICs including high-speed bus termination and 3.3V logic supply, and is packaged in lead-free TO252-5L. Designed for PC peripherals and communication modules requiring compact, thermally robust regulation.
For engineers reviewing the AP1118D15L-13 datasheet, AP1118D15L-13 pinout, AP1118D15L-13 application, or AP1118D15L-13 equivalent, this page provides verified electrical specs, thermal resistance data, EN logic behavior, dropout performance across temperature, and real-world use cases in VGA cards and CD-ROM power rails - all derived from Anachip's Rev. 1.1 datasheet.
Technical Context
The AP1118D15L-13 integrates internal current limiting and thermal shutdown circuitry to protect against overcurrent and junction overheating up to +150°C. Its enable input features an internal ~100 kΩ pull-down resistor, ensuring default-on operation when left floating or driven low.
It maintains regulation with input voltages as low as VOUT + 1.3V (i.e., ≥2.8V for 1.5V output), supports 100 µA typical enable current at 2.0V, and achieves 60–70 dB ripple rejection at 120 Hz with 25 µF tantalum output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.500 V ±2% (1.47–1.53 V) at 10 mA, 25°C - ensures compatibility with 1.5V core logic and DDR termination rails. |
| Dropout Voltage | ≤1.4 V at 1 A load - enables stable 1.5V output from as low as 2.9V input, critical for battery-backed or low-headroom systems. |
| Load Regulation | 12–15 mV (0–1 A load change) - minimizes output sag during dynamic current steps in peripheral controllers. |
| Ripple Rejection | 60–70 dB at 120 Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Resistance θJA | 102 °C/W (TO252-5L, no heatsink, no airflow) - defines safe continuous power dissipation limit (~1.47 W at ΔT = 150°C). |
| Enable Logic Threshold | Logic Low ≤0.8 V (enable), Logic High ≥1.6 V (disable) - compatible with 3.3V and 5V GPIO without level-shifting. |
| Quiescent Current | ~100 µA at VEN = 2.0 V - reduces standby power in always-on subsystems like USB host controllers. |
Pinout & Package
AP1118D15L-13 uses the TO252-5L (DPAK) surface-mount package with exposed thermal pad (Tab = VOUT). Pin 1 is Vin, Pin 2 is GND, Pin 3 is EN, Pin 4 is NC (not connected), and Pin 5 is VOUT - with the metal tab electrically tied to VOUT for enhanced thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Vin) | Input supply connection | Must be ≥2.8V (VOUT + 1.3V) to maintain regulation; requires bulk capacitor (≥100 µF) to prevent sag during transients. |
| Pin 2 (GND) | Ground reference | Common return path for load, feedback, and enable circuitry; must be low-impedance to minimize noise coupling. |
| Pin 3 (EN) | Enable control input | TTL/CMOS-compatible; internal 100 kΩ pull-down ensures default-on if unconnected; open-circuit = enabled. |
| Pin 4 (NC) | No connection | Not internally bonded; must remain unconnected per datasheet - routing to ground or signal violates specification. |
| Pin 5 (VOUT) | Regulated output | Delivers 1.5V @ up to 1A; requires ≥10 µF ceramic/tantalum capacitor to ground for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 1.4 V max at 1 A - enables operation from single-cell LiFePO₄ (3.2V) or dual-cell NiMH (2.4V nominal) inputs. |
| Fast transient response | ≤100 µs recovery from 100 mA → 1 A load step - maintains voltage within ±33 mV for VGA memory interface timing margins. |
| Built-in protection | Current limiting (≥1.1 A) and thermal shutdown (150°C junction) - eliminates need for external foldback or thermal sensors. |
| Good noise rejection | 70 dB at 120 Hz with 25 µF tantalum - isolates sensitive analog sections (e.g., CD-ROM laser drivers) from digital supply noise. |
| Lead-free & RoHS-compliant | "L" suffix denotes lead-free TO252-5L package - meets IPC/JEDEC J-STD-020D reflow profile requirements. |
Applications
| PC Peripheral Power | VGA Card Core Supply |
|---|---|
Use Scenario: Providing clean 1.5V bias to USB 3.0 hub controllers and SATA bridge ICs on add-in cards. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering stable core voltage downstream of a buck converter. Use Value: 12 mV load regulation prevents USB packet corruption during hot-plug detection bursts. |
Use Scenario: Powering DDR SDRAM termination and GPU I/O buffers on legacy VGA expansion cards. IC Role / Device Role / Timing Role: Fixed-output LDO supplying 1.5V VTT rail with fast transient response for memory bus signaling. Use Value: 100 µs load-step recovery ensures setup/hold timing compliance under GPU memory access spikes. |
| CD-ROM Drive Logic | Communication Module Bias |
Use Scenario: Generating 1.5V for servo control ASICs and spindle motor driver logic in optical drives. IC Role / Device Role / Timing Role: Dedicated low-dropout regulator for real-time motion control subsystems. Use Value: 1.4V dropout allows direct regulation from 3.3V main rail, reducing component count vs. cascaded conversion. |
Use Scenario: Supplying 1.5V to RS-485 transceiver bias circuits and UART interface logic in industrial modems. IC Role / Device Role / Timing Role: Enable-controlled auxiliary regulator enabling/disabling comms channel power during sleep cycles. Use Value: EN pin logic compatibility with 3.3V microcontrollers enables precise power sequencing without external MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout fixed-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29150-1.5WU | 1.5A rated, 0.4V dropout at 1.5A, higher quiescent current (40 mA), TO263-5 package | Higher current headroom but larger footprint and worse thermal resistance (θJA = 90°C/W) than AP1118D15L-13's 102°C/W | Select when >1A peak load or lower dropout is required; avoid if board space or thermal budget is constrained. |
| LD1117S15TR | 800 mA rated, 1.1V dropout at 800 mA, SO-8 package, no enable pin | Lacks EN function and 1A capability; requires external logic for power sequencing | Choose only for cost-sensitive, non-sequenced 1.5V rails where 800 mA suffices and enable control is unnecessary. |
Compared with MIC29150-1.5WU and LD1117S15TR, AP1118D15L-13 uniquely balances 1A delivery, 1.4V dropout, integrated enable, and TO252-5L thermal performance - making it optimal for space-constrained, sequenced peripheral supplies where reliability and simplicity are prioritized over ultra-low dropout or ultra-high current.
Availability
AP1118D15L-13 is available at Aetrix Electronics and suitable for PC peripheral design, optical drive power management, VGA card development, and industrial communication module production requiring stable component supply and long-term manufacturability.
Supply support for AP1118D15L-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
Anachip Corp. is a Taiwan-based semiconductor company specializing in analog and power management ICs, founded in 1996 and focused on cost-effective, high-reliability solutions for consumer and industrial markets.
The AP1118 series belongs to Anachip's low-dropout linear regulator product line, engineered specifically for stable, low-noise, enable-controlled voltage regulation in PC peripherals, optical storage, and graphics subsystems.
FAQ
What is the minimum input voltage required for AP1118D15L-13 to regulate 1.5V output?
The device requires VIN ≥ VOUT + 1.3V to maintain regulation, so minimum input is 2.8V. At 1A load, dropout is guaranteed ≤1.4V, meaning 2.9V input sustains 1.5V output. Below 2.8V, output collapses linearly with input.
Can the NC pin (Pin 4) be grounded or used for thermal relief?
No - Pin 4 is explicitly marked "NC" (no connection) and not internally bonded. Grounding or routing it violates the datasheet. Thermal relief must be achieved via the exposed VOUT-connected tab, not Pin 4.
Does AP1118D15L-13 require an output capacitor, and what type is recommended?
Yes - a minimum 10 µF capacitor is mandatory from VOUT to GND for stability. The datasheet specifies good performance with 100 µF tantalum or low-ESR ceramic capacitors; insufficient capacitance causes oscillation or poor transient response.
How does the enable pin behave when left unconnected?
Pin 3 (EN) has an internal ~100 kΩ pull-down resistor, so an open or floating EN pin defaults to logic low (≤0.8 V), enabling the output. No external pull-down is needed unless active-high enable logic is implemented elsewhere.
AP1118D15L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-6, DPAK (5 Leads + Tab)
- 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-5
AP1118D15L-13 FAQ
1.How can I place an order for AP1118D15L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1118D15L-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 AP1118D15L-13 reliable?
The price and inventory of AP1118D15L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1118D15L-13 is usually 5 days.
3.What payment methods are accepted for AP1118D15L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1118D15L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1118D15L-13?
AP1118D15L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1118D15L-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 AP1118D15L-13?
For technical support, including AP1118D15L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1118D15L-13 requirements.
6.How does Aetrix verify that AP1118D15L-13 is sourced from the original manufacturer or authorized distributors?
All AP1118D15L-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 AP1118D15L-13 meets industry standards.
7.What is the process for return or replacement of AP1118D15L-13?
All AP1118D15L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1118D15L-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 AP1118D15L-13 part is unused and in its original packaging.
Return procedure for AP1118D15L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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