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Diodes Incorporated AP1118S50L-13
- Part No.:
- AP1118S50L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP1118S50L-13.pdf
- Description:
- IC REG LINEAR 5V 1A 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,002
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Product details
Overview
AP1118S50L-13 from Anachip Corp. is a 1A, 5.0V fixed-output positive low dropout linear regulator in SOP-8L package with TTL/CMOS-compatible enable (EN) function, 1.4V max dropout at full load, ±2% output voltage accuracy, and built-in thermal shutdown - designed for stable 3.3V/5V logic supply in PC peripherals and communication modules.
For engineers reviewing the AP1118S50L-13 datasheet, AP1118S50L-13 pinout, AP1118S50L-13 application, or AP1118S50L-13 equivalent, key selection criteria include dropout voltage under 1A load, EN logic polarity (low-enable), thermal resistance (θJA = 150°C/W), output stability with ≥10µF capacitor, and lead-free SOP-8L packaging compliance.
Technical Context
The AP1118S50L-13 implements a PNP-based LDO architecture with internal current limiting and thermal foldback, supporting input voltages up to 18V while regulating 5.0V ±2% across 0–1A load range. Its EN pin features an internal ~100kΩ pull-down resistor, enabling default-on operation when left floating.
Designed for low-noise, high-transient-response applications, it delivers 70dB ripple rejection at 120Hz with 25µF tantalum output capacitance and maintains regulation down to 5mA minimum load current across –25°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±2% (guaranteed over 10mA–1A, 25°C) |
| Max Dropout Voltage | 1.4 V at 1A load (enables regulation with VIN ≥ 6.4V) |
| Line Regulation | 0.2% (ensures <10mV output shift over VIN range) |
| Load Regulation | 33 mV (max deviation from 0–1A load change) |
| Ripple Rejection | 70 dB at 120Hz (suppresses input ripple for clean digital supply) |
| Thermal Resistance θJA | 150 °C/W (SOP-8L, no heatsink; limits power dissipation to ~0.6W at 50°C ambient) |
| Enable Threshold | Logic Low ≤0.8V enables output; Logic High ≥1.6V disables output |
Pinout & Package
SOP-8L package: 8-pin surface-mount, exposed pad not electrically connected, RoHS-compliant lead-free finish. Tab is not used as thermal pad or electrical terminal in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vout | Main regulated 5.0V output; requires ≥10µF capacitor to ground for stability |
| 2 | GND | Power ground reference; connects to PCB ground plane for noise control |
| 3 | EN | Enable input: TTL/CMOS-compatible; internal 100kΩ pull-down ensures default-on |
| 4 | Vin | Input supply (up to 18V); must exceed Vout by ≥1.3V for regulation |
| 5 | Vout | Redundant output pin; paralleled with Pin 1 for current sharing and lower impedance |
| 6 | Vout | Redundant output pin; paralleled with Pins 1 & 5 to reduce trace IR drop |
| 7 | Vout | Redundant output pin; provides additional current path and thermal relief |
| 8 | Vout | Redundant output pin; improves load transient response via distributed capacitance |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 1.4V max dropout enables 5V output from 6.4V input - critical for battery-powered or multi-rail systems |
| Fast transient response | ≤100µs recovery from 100mA→1A load step - sustains logic rail integrity during burst-mode operation |
| Built-in protection | Current limit (1.1A min) + thermal shutdown - eliminates need for external foldback circuitry |
| Noise-sensitive operation | 70dB ripple rejection + <2% output tolerance - meets tight margin requirements of 3.3V/5V FPGA I/O banks |
| Logic-compatible enable | EN pin accepts standard 0–3.3V/5V logic levels without level-shifting - simplifies host MCU interface |
Applications
| PC Peripheral Power | Communication Module Supply |
|---|---|
Use Scenario: Powering USB hub controller and PHY ICs on add-in cards requiring clean, sequenced 5V rail. IC Role / Device Role / Timing Role: Primary 5V LDO supplying VCC_IO and VDDA rails with fast load-step response. Use Value: 1.4V dropout allows direct use of 7V–12V ATX standby or adapter input; EN pin enables firmware-controlled power gating. |
Use Scenario: Regulating 5V for RS-485 transceivers and Ethernet PHYs in industrial gateways. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling noisy DC/DC converter outputs. Use Value: 70dB ripple rejection prevents data corruption on differential bus lines; thermal shutdown protects against field-replaceable module overheating. |
| VGA Card Core Logic | CD-ROM Drive Controller |
Use Scenario: Delivering stable 5V to VGA DAC and timing controller ICs in legacy graphics cards. IC Role / Device Role / Timing Role: Fixed-output LDO replacing older 7805 designs where space and thermal headroom are constrained. Use Value: SOP-8L footprint reduces PCB area vs TO-220; 150°C/W θJA supports convection-cooled layouts without heatsinks. |
Use Scenario: Supplying 5V to spindle motor driver and ATAPI interface logic in optical drives. IC Role / Device Role / Timing Role: Secondary regulator downstream of main DC/DC, providing isolated, low-noise logic power. Use Value: Load regulation ≤33mV ensures consistent timing margin for ATA command decoding; EN pin allows sleep-mode current reduction. |
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 |
|---|---|---|---|
| AP1117K50L-13 | 0.8A max output, TO-252-3 package, no EN pin, 1.25V dropout | Lacks enable control and 1A capability; limited to lower-power logic rails | Select only if board space permits DPAK and enable functionality is unnecessary |
| MIC29302WU | 3A output, TO-263-5 package, 0.4V dropout, adjustable or fixed 5V option | Higher current and lower dropout but larger footprint and higher quiescent current (10mA vs 80µA) | Prefer for high-current loads >1.2A or where input headroom is <6.4V |
Compared with AP1118S50L-13, AP1117K50L-13 trades enable control and current rating for smaller thermal footprint, while MIC29302WU offers higher drive capacity and lower dropout at the cost of size and static power - making AP1118S50L-13 optimal for compact, enable-aware 1A 5V applications.
Availability
AP1118S50L-13 is available at Aetrix Electronics and suitable for PC peripheral power, communication module supply, VGA card core logic, and CD-ROM drive controller applications requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for AP1118S50L-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 analog and power management IC designer founded in 1996, specializing in LDOs, DC/DC converters, and LED drivers for consumer and industrial markets.
The AP1118 product line targets cost-sensitive, high-volume applications needing reliable fixed-output LDOs with enable control and robust thermal protection - especially in PC add-in cards and optical storage subsystems.
FAQ
What is the minimum input voltage required for AP1118S50L-13 to regulate 5.0V?
The device requires Vin ≥ Vout + 1.3V to maintain regulation, so minimum valid input is 6.3V. At 1A load, dropout rises to 1.4V - meaning 6.4V is the practical minimum for full-load operation. Below this, output voltage sags proportionally to (Vin – Vout).
Can the EN pin be left unconnected?
Yes - the EN pin has an internal ~100kΩ pull-down resistor, so an open or floating EN pin defaults to logic low and enables the output. However, for noise immunity in high-EMI environments, tying EN to GND via a 10kΩ resistor is recommended.
Is an output capacitor mandatory, and what type is specified?
Yes - a minimum 10µF capacitor is required from Vout to GND for stability. The datasheet specifies tantalum or aluminum electrolytic types; ceramic capacitors may cause oscillation unless ESR is ≥30mΩ. For best transient response, 100µF tantalum is recommended.
Does AP1118S50L-13 support reverse-voltage or reverse-current protection?
No - the device lacks integrated reverse-voltage or reverse-current protection. If input can be disconnected while output remains biased (e.g., back-driving from downstream circuitry), an external series Schottky diode on Vin is required to prevent damage.
AP1118S50L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 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:
- 8-SOP
AP1118S50L-13 FAQ
1.How can I place an order for AP1118S50L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1118S50L-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 AP1118S50L-13 reliable?
The price and inventory of AP1118S50L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1118S50L-13 is usually 5 days.
3.What payment methods are accepted for AP1118S50L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1118S50L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1118S50L-13?
AP1118S50L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1118S50L-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 AP1118S50L-13?
For technical support, including AP1118S50L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1118S50L-13 requirements.
6.How does Aetrix verify that AP1118S50L-13 is sourced from the original manufacturer or authorized distributors?
All AP1118S50L-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 AP1118S50L-13 meets industry standards.
7.What is the process for return or replacement of AP1118S50L-13?
All AP1118S50L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1118S50L-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 AP1118S50L-13 part is unused and in its original packaging.
Return procedure for AP1118S50L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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