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Diodes Incorporated AP1117D18G-13
- Part No.:
- AP1117D18G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AP1117D18G-13.pdf
- Description:
- IC REG LINEAR 1.8V 1A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,028
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Product details
Overview
AP1117D18G-13 from Diodes Incorporated is a 1A low-dropout linear regulator with fixed 1.8V output, TO252 (DPAK) surface-mount package, 1.4V max dropout at 1A, ±2% output voltage accuracy over temperature and load, and integrated thermal shutdown and current limiting. It delivers stable 1.8V supply for FPGA I/O banks and low-voltage microcontroller cores in industrial-grade embedded systems.
For engineers reviewing the AP1117D18G-13 datasheet, AP1117D18G-13 pinout, AP1117D18G-13 application, or AP1117D18G-13 equivalent, key selection criteria include dropout voltage at full load, thermal resistance (θJA = 73°C/W on 2oz FR-4), minimum required output capacitance (4.7µF ceramic), junction temperature range (–20°C to +125°C), and compatibility with MLCC decoupling.
Technical Context
The AP1117D18G-13 uses an internal NPN pass transistor with 1.25V reference and error amplifier to maintain regulation. Its feedback network is internal - no external resistors required for fixed 1.8V operation - simplifying layout and improving stability versus adjustable variants.
It features fast transient response due to optimized compensation for 4.7µF MLCC output capacitors, and its thermal shutdown activates at ~150°C junction temperature, cycling off/on until die cools. Dropout behavior is specified across –20°C to +125°C ambient, with guaranteed ≤1.4V at 1A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.800 V ±2% (1.764–1.836 V) at 10mA, 3.3V ≤ VIN ≤ 12V - ensures reliable core voltage for 1.8V logic families. |
| Dropout Voltage | ≤1.4 V at 1A, ΔVOUT = 1% - enables regulation from 3.2V input, critical for battery-backed or multi-rail systems. |
| Output Current | 1 A continuous - supports single-rail power for mid-complexity SoCs or dual-core MCUs. |
| Thermal Resistance θJA | 73 °C/W (TO252, 2oz Cu, 5mm × 5mm pad, no airflow) - defines maximum power dissipation (≈1.37W at ΔT = 100°C) before thermal foldback. |
| Input Voltage Range | 3.3 V to 18 V DC - accommodates unregulated 5V/12V rails and automotive transients up to ISO 7637-2 Pulse 5a. |
| Load Regulation | ≤18 mV (0–1A, VIN = 3.3V) - maintains tight voltage window under dynamic CPU/GPU load switching. |
| Stability Capacitor | 4.7 µF ceramic X7R (ESR ≤ 0.5Ω) - enables compact, low-ESR decoupling without tantalum or electrolytic bulk caps. |
Pinout & Package
AP1117D18G-13 is housed in a lead-free, halogen-free TO252-3 (DPAK) surface-mount package with exposed thermal tab connected internally to VOUT. The tab must be soldered to a ≥100 mm² copper pour for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Regulator input | Accepts 3.3–18V; requires ≥4.7µF low-ESR capacitor to ground within 10mm trace length to prevent input sag during load transients. |
| 2 (VOUT) | Regulated output | Delivers fixed 1.8V; connects directly to thermal tab - must be tied to large copper area for heat spreading and low-impedance return path. |
| 3 (Adj/GND) | Reference ground | Internal connection to error amplifier ground; must be routed with minimal impedance to system ground plane to avoid regulation drift. |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Stable with 4.7µF MLCC output cap - eliminates need for bulky tantalum, reducing board space and cost in high-density designs. |
| Industrial temperature grade | –20°C to +125°C operating junction range - qualified for extended-temperature industrial control and automotive infotainment modules. |
| Integrated protection | Current limiting + thermal shutdown - prevents catastrophic failure during short-circuit or PCB overheating without external circuitry. |
| Low-noise regulation | 70 dB ripple rejection at 180 Hz - suppresses switching noise from upstream DC/DC converters feeding sensitive analog or RF subsystems. |
| Green packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) - meets IPC-1752A Tier 1 environmental compliance requirements. |
Applications
| Industrial PLC I/O Modules | FPGA Configuration Power |
|---|---|
|
Use Scenario: Powering isolated digital I/O channels in programmable logic controllers operating in factory-floor environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying FPGA configuration banks and level-shifting buffers interfacing with 24V field sensors. Use Value: Guaranteed regulation down to –20°C and thermal robustness enable uninterrupted operation during cold-start conditions and sustained 1A loads without derating. |
Use Scenario: Providing clean, low-noise 1.8V supply to Spartan-7 or Artix-7 FPGA configuration memory and I/O banks during boot and reconfiguration. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable core voltage independent of upstream DC/DC switching noise. Use Value: 70 dB ripple rejection and fast transient response prevent bit errors in configuration SRAM and ensure reliable JTAG programming sequences. |
| Automotive Infotainment Head Units | Medical Diagnostic Sensor Interfaces |
|
Use Scenario: Supplying 1.8V to audio codec ICs and touch controller ASICs in dashboard head units exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Secondary LDO downstream of a 5V buck converter, filtering switching artifacts before analog signal chain inputs. Use Value: TO252 thermal performance (θJA = 73°C/W) and –20°C start-up capability support AEC-Q200-aligned reliability without heatsinks. |
Use Scenario: Powering precision ADC front-ends and low-power microcontrollers in portable ultrasound or ECG sensor modules requiring ultra-low noise and long battery life. IC Role / Device Role / Timing Role: Low-dropout regulator enabling direct battery-to-1.8V conversion from partially discharged Li-ion cells (≥3.2V). Use Value: 1.4V dropout at 1A extends usable battery runtime by >12% compared to standard 1117 variants, while maintaining ±2% accuracy over medical-grade temperature range. |
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 |
|---|---|---|---|
| MIC29302WU-1.8 | Higher dropout (1.6V @ 1A), higher quiescent current (45mA vs. 10mA), TO263 package | Less suitable for low-input-voltage battery systems; better thermal margin (θJA = 60°C/W) only with large heatsink | Select if board-level heatsinking is available and input voltage ≥4.5V; avoid for 3.3V rail-derived supplies. |
| TLV1117-18CDR | Lower max current (800mA), wider output tolerance (±3%), SOT223 package, θJA = 107°C/W | Limited to lower-power MCU applications; requires larger copper area for same thermal performance | Choose for cost-sensitive consumer designs where 800mA suffices and thermal budget allows 107°C/W derating. |
Compared with MIC29302WU-1.8 and TLV1117-18CDR, AP1117D18G-13 offers the lowest dropout (1.4V) and best thermal efficiency (73°C/W) in TO252 among 1.8V 1A LDOs, making it optimal for space-constrained industrial and automotive boards where input headroom and thermal management are critical.
Availability
AP1117D18G-13 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA configuration power supplies, and automotive infotainment head units requiring stable component supply with guaranteed long-term manufacturability and RoHS/Green compliance.
Supply support for AP1117D18G-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions, with design centers in Asia, Europe, and the US, serving industrial, computing, and automotive markets.
The AP1117 series belongs to Diodes' high-reliability linear regulator product line, engineered specifically for low-noise, low-dropout power delivery in space-constrained industrial and communications equipment where thermal resilience and fixed-voltage simplicity are prioritized.
FAQ
What is the minimum input voltage required for AP1117D18G-13 to regulate at full 1A load?
The device requires VIN ≥ VOUT + dropout voltage. With a guaranteed max dropout of 1.4V at 1A and 1.8V output, the minimum input is 3.2V. At lower inputs, regulation fails and VOUT drops linearly with VIN. Input must also exceed absolute max rating limits (–0.3V to +18V) and maintain ≥1.3V differential for proper biasing per datasheet Section 3.
Can AP1117D18G-13 be used with ceramic capacitors only, and what ESR range is acceptable?
Yes - it is explicitly qualified for MLCC output capacitors. The datasheet specifies a minimum 4.7µF X7R ceramic capacitor with ESR between 0.15Ω and 0.5Ω. Y5V dielectrics are prohibited due to capacitance drift; aluminum electrolytics require ≥47µF and benefit from parallel 1µF MLCC. Input capacitor must also meet the same ESR limit.
How does thermal shutdown behave, and is it latch-off or auto-recover?
Thermal shutdown is auto-recovering: when junction temperature reaches ~150°C, the output disables; once the die cools below ~135°C (typical hysteresis), regulation resumes automatically. This cycle prevents permanent damage but causes output voltage interruption - system-level brown-out detection is recommended for critical loads.
Is AP1117D18G-13 pin-compatible with other '1117-family regulators in TO252?
Yes - it shares identical TO252-3 pinout (VIN-VOUT-GND) and footprint with industry-standard 1117 regulators including LM1117, LD1117, and RT9193. However, differences in dropout, thermal resistance, and MLCC compatibility mean electrical performance may vary; always validate transient response and thermal rise in final layout.
AP1117D18G-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (180Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
AP1117D18G-13 FAQ
1.How can I place an order for AP1117D18G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117D18G-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 AP1117D18G-13 reliable?
The price and inventory of AP1117D18G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117D18G-13 is usually 5 days.
3.What payment methods are accepted for AP1117D18G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117D18G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117D18G-13?
AP1117D18G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117D18G-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 AP1117D18G-13?
For technical support, including AP1117D18G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117D18G-13 requirements.
6.How does Aetrix verify that AP1117D18G-13 is sourced from the original manufacturer or authorized distributors?
All AP1117D18G-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 AP1117D18G-13 meets industry standards.
7.What is the process for return or replacement of AP1117D18G-13?
All AP1117D18G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117D18G-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 AP1117D18G-13 part is unused and in its original packaging.
Return procedure for AP1117D18G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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