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Diodes Incorporated AP2205-18W5-7
- Part No.:
- AP2205-18W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2205-18W5-7.pdf
- Description:
- IC REG LINEAR 1.8V 250MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,395
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Product details
Overview
AP2205-18W5-7 from Diodes Incorporated is a fixed-output 1.8V ultra-low dropout (ULDO) linear regulator in SOT25 package, delivering up to 200mA output current with 100mV dropout at 100µA load. It features 2.3V–24V wide input range, ±2% output voltage accuracy, 60dB PSRR at 1kHz, and integrated thermal shutdown, overcurrent, and reverse-current protection-designed for USB-powered portable devices and battery-operated systems requiring stable low-voltage rail generation.
For engineers reviewing the AP2205-18W5-7 datasheet, AP2205-18W5-7 pinout, AP2205-18W5-7 application, or AP2205-18W5-7 equivalent, key selection considerations include its 1.8V fixed output, SOT25 footprint compatibility, ultra-low quiescent current (36µA at 100µA load), enable-controlled low-power shutdown mode, and ceramic-capacitor compatibility without ESR requirements.
Technical Context
The AP2205-18W5-7 implements a high-voltage EPNP-based LDO architecture with internal 1.24V reference, error amplifier, and precision resistor network for fixed 1.8V output. Its control loop maintains regulation across –40°C to +125°C junction temperature with ±100ppm/°C output voltage drift.
Functional integration includes active-high enable (EN) with 2.0V logic-high threshold, thermal shutdown activation at +150°C, current-limit protection limiting IOUT to ≥200mA, and reverse-current blocking preventing VOUT→VIN backfeed during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% - ensures stable core/logic rail for 1.8V microcontrollers and memory interfaces |
| Input Voltage Range | 2.3V to 24V - supports single-cell Li-ion, multi-cell alkaline, and industrial 12V/24V supply inputs |
| Max Output Current | 200mA at VOUT > 1.8V - sufficient for low-power MCU subsystems and sensor interfaces |
| Dropout Voltage | 100mV @ 100µA load - enables operation down to 1.9V input for extended battery runtime |
| PSRR | 60dB @ 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO |
| Quiescent Current | 36µA @ 100µA load - minimizes standby power loss in always-on battery applications |
| Enable Threshold | VEN(HI) = 2.0V, VEN(LO) = 0.4V - compatible with 1.8V/3.3V GPIO without level-shifting |
Pinout & Package
SOT25 (SC-74A) package: 5-pin surface-mount, 1.6mm × 2.9mm footprint, lead-free matte tin plating, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 2.3V–24V unregulated input; requires 1.0µF ceramic decoupling capacitor |
| 2 (GND) | Ground reference | Common return path for input/output currents and internal circuitry; must be low-impedance |
| 3 (EN) | Enable control input | Active-high logic input; pulls regulator into ultra-low-IQ shutdown (<1µA) when low |
| 4 (ADJ/NC) | Adjust/No-connect terminal | No-connect for fixed 1.8V version; left floating or grounded per layout best practice |
| 5 (VOUT) | Regulated output | Delivers stable 1.8V ±2%; requires 2.2µF ceramic output capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range | 2.3V–24V operation eliminates need for pre-regulation in multi-battery or industrial supply designs |
| Ultra-low dropout | 100mV dropout at light load extends usable battery voltage range by ~200mV in 1.8V systems |
| Ceramic capacitor compatible | Stable with 2.2µF X5R/X7R ceramics - reduces BOM cost and board area vs. tantalum alternatives |
| Reverse current protection | Blocks VOUT→VIN current flow during shutdown - prevents backfeeding in multi-rail systems |
| Thermal & overcurrent protection | Auto-recovery shutdown at +150°C junction temp and >250mA short-circuit current - ensures robust field reliability |
Applications
| USB-Powered Peripherals | Portable Medical Sensors |
|---|---|
|
Use Scenario: Powering BLE modules, USB-C audio adapters, and HID peripherals from 5V USB bus or 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying RF transceiver core voltage and digital logic rails. Use Value: 60dB PSRR rejects USB switcher noise; 36µA quiescent current extends battery life beyond 12 months in sleep mode. |
Use Scenario: Regulating power for wearable ECG/SpO₂ sensors operating on coin-cell or rechargeable batteries. IC Role / Device Role / Timing Role: Low-noise 1.8V supply for analog front-end amplifiers and ADC reference circuits. Use Value: 30µVRMS output noise avoids signal degradation; ±2% accuracy ensures consistent sensor calibration across temperature. |
| Industrial IoT Edge Nodes | Low-Power Microcontroller Systems |
|
Use Scenario: Powering ARM Cortex-M0+ nodes in wireless sensor networks deployed in remote locations with 12V/24V field wiring. IC Role / Device Role / Timing Role: Secondary LDO generating clean 1.8V for MCU I/O banks and external flash memory interface. Use Value: 24V max input withstands industrial transients; thermal shutdown prevents latch-up in enclosed enclosures. |
Use Scenario: Supplying 1.8V core voltage to RISC-V or ARM microcontrollers in battery-backed smart meters and asset trackers. IC Role / Device Role / Timing Role: Enable-controlled power domain regulator enabling deep-sleep modes with <1µA system standby current. Use Value: EN pin allows precise sequencing; 100mV dropout enables operation until battery reaches 1.9V, maximizing energy extraction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 1.8V fixed, 250mA max, 1.6V–6.0V input, 175mV dropout @ 250mA | Limited to ≤6V input - unsuitable for 12V/24V industrial or multi-cell battery use | Select when input is strictly ≤6V and higher output current is required; not drop-in for AP2205's wide-input use cases |
| Torex XC6206P182MR-G | 1.8V fixed, 250mA max, 2.0V–6.0V input, 120mV dropout @ 100mA | Narrower 2.0V–6.0V input range and no enable pin - lacks shutdown control and wide-supply flexibility | Choose only for cost-sensitive ≤6V applications where enable functionality and 24V tolerance are unnecessary |
Compared with MCP1700-1802E/TO and XC6206P182MR-G, the AP2205-18W5-7 uniquely combines 24V input tolerance, enable control, reverse-current blocking, and sub-100mV dropout at microamp loads-making it the sole fit for battery-to-24V universal LDO applications demanding both wide input and ultra-low IQ.
Availability
AP2205-18W5-7 is available at Aetrix Electronics and suitable for USB-powered peripherals, portable medical sensors, and industrial IoT edge nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for AP2205-18W5-7 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 ICs, with design centers across Asia, Europe, and the US, and ISO/TS 16949-certified manufacturing facilities.
The AP2205 series belongs to Diodes' high-voltage LDO product line, engineered specifically for battery-powered and wide-input industrial applications where ultra-low dropout, low noise, and robust protection features are critical.
FAQ
What is the minimum input voltage required for AP2205-18W5-7 to regulate at 1.8V?
The AP2205-18W5-7 requires VIN ≥ 1.9V to maintain regulation at 1.8V output under light load (100µA), based on its 100mV dropout specification. At 200mA load, dropout rises to 460mV, requiring VIN ≥ 2.26V. The absolute minimum VIN is 2.3V per recommended operating conditions, ensuring reliable startup and full-spec performance across temperature and process variation.
Can AP2205-18W5-7 be used with ceramic output capacitors smaller than 2.2µF?
No-Diodes specifies a minimum 2.2µF X5R/X7R ceramic capacitor at VOUT for stability across all operating conditions. Using smaller values risks oscillation or poor transient response, especially under load steps. The device is not compensated for lower capacitance; layout parasitics and capacitor ESR variations further reduce margin below 2.2µF.
Does AP2205-18W5-7 require an input capacitor, and what value is recommended?
Yes-an input capacitor is mandatory. Diodes recommends a minimum 1.0µF X5R/X7R ceramic capacitor placed within 2mm of the VIN and GND pins. This stabilizes the input source impedance, suppresses high-frequency noise, and prevents oscillation during fast load transients. Larger values (e.g., 4.7µF) improve ripple rejection but are not required for basic stability.
Is AP2205-18W5-7 qualified for automotive applications per AEC-Q100?
No-the AP2205-18W5-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP2205xxQ series) with PPAP capability, IATF 16949 manufacturing, and extended temperature screening. This part is rated for industrial temperature range (–40°C to +125°C) but lacks automotive change control, qualification testing, and certified lot traceability required for automotive deployment.
AP2205-18W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 60dB (100Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP2205-18W5-7 FAQ
1.How can I place an order for AP2205-18W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2205-18W5-7 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 AP2205-18W5-7 reliable?
The price and inventory of AP2205-18W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2205-18W5-7 is usually 5 days.
3.What payment methods are accepted for AP2205-18W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2205-18W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2205-18W5-7?
AP2205-18W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2205-18W5-7 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 AP2205-18W5-7?
For technical support, including AP2205-18W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2205-18W5-7 requirements.
6.How does Aetrix verify that AP2205-18W5-7 is sourced from the original manufacturer or authorized distributors?
All AP2205-18W5-7 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 AP2205-18W5-7 meets industry standards.
7.What is the process for return or replacement of AP2205-18W5-7?
All AP2205-18W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2205-18W5-7, 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 AP2205-18W5-7 part is unused and in its original packaging.
Return procedure for AP2205-18W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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