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Diodes Incorporated AP2204K-1.8TRG1
- Part No.:
- AP2204K-1.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2204K-1.8TRG1.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,915
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Product details
Overview
AP2204K-1.8TRG1 from Diodes Incorporated is a 1.8V fixed-output, 150mA ultra-low dropout (ULDO) linear regulator in SOT-23-5 package. It operates across 2.6V–24V input, delivers ±2% output voltage accuracy, achieves 100mV dropout at 100µA load, and maintains 60dB PSRR at 1kHz-enabling stable power for USB peripherals and portable battery-powered systems.
For engineers reviewing the AP2204K-1.8TRG1 datasheet, AP2204K-1.8TRG1 pinout, AP2204K-1.8TRG1 application, or AP2204K-1.8TRG1 equivalent, key selection criteria include its wide VIN range, low quiescent current (20µA no-load), thermal shutdown protection, compatibility with ceramic output capacitors, and enable-controlled power sequencing in space-constrained designs.
Technical Context
The AP2204K-1.8TRG1 integrates a precision 1.24V bandgap reference, error amplifier, resistor network for fixed 1.8V output, current-limit circuitry, and chip-enable logic. Its EPNP process enables high-voltage tolerance while maintaining low ground current across load conditions.
It features internal thermal shutdown and uses an adjustable feedback path only in ADJ variants; the -1.8TRG1 version has ADJ/NC internally tied, requiring external NC connection to GND for optimal thermal dissipation via PCB copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% - ensures stable core voltage for 1.8V I/O or low-power microcontrollers without external resistors. |
| Input Voltage Range | 2.6V to 24V - supports single-cell LiFePO₄ up to 24V industrial rails without pre-regulation. |
| Dropout Voltage | 100mV @ 100µA - enables regulation down to VIN = 1.9V, critical for battery end-of-life operation. |
| PSRR | 60dB @ 1kHz - suppresses switching noise from upstream DC-DC converters feeding sensitive analog or RF circuitry. |
| Quiescent Current | 20µA @ no load - extends runtime in always-on sensor nodes and standby modes. |
| Enable Threshold | VEN(HI) ≥ 2.0V, VEN(LO) ≤ 0.4V - compatible with 1.8V/3.3V GPIOs for precise power gating control. |
| Thermal Shutdown | Active at TJ > +150°C - protects against sustained overload or poor PCB heatsinking in enclosed enclosures. |
Pinout & Package
SOT-23-5 package: 2.9mm × 1.6mm footprint with exposed pad thermally connected to GND; optimized for manual assembly and reflow-compatible PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply rail; must be decoupled with ≥1.0µF ceramic capacitor close to pin. |
| 2 | GND | Analog/digital ground reference; connects to PCB thermal pad for heat dissipation. |
| 3 | EN | Active-high enable input; pulled low disables regulator and reduces IQ to 0.01µA. |
| 4 | ADJ/NC | No-connect for fixed 1.8V version; tie to GND to maximize thermal copper area on PCB. |
| 5 | VOUT | Regulated 1.8V output; requires ≥2.2µF low-ESR ceramic capacitor for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (2.6–24V) | Eliminates need for intermediate buck stages when powering from diverse sources like automotive, industrial, or multi-cell batteries. |
| Ultra-low quiescent current (20µA) | Reduces standby power loss by >90% vs. standard LDOs, extending shelf life of battery-backed IoT sensors. |
| Low-noise 30µVRMS output | Meets noise-sensitive requirements for ADC references, RF synthesizers, and precision analog front-ends. |
| Ceramic-capacitor compatible | Enables use of small, reliable, low-ESR 0603/0805 MLCCs instead of larger, aging-prone tantalum or aluminum electrolytics. |
| Thermal shutdown + current limit | Provides autonomous fault containment during short-circuit events or ambient temperature excursions without external circuitry. |
Applications
| USB Peripheral Power | Portable Medical Sensor |
|---|---|
|
Use Scenario: Powering USB HID devices (keyboards, mice) from 5V USB bus or 3.7V Li-ion battery. IC Role / Device Role / Timing Role: ULDO regulator providing clean 1.8V for MCU I/O and USB transceiver logic. Use Value: Maintains regulation down to 1.9V input, enabling full battery discharge while preserving USB enumeration integrity. |
Use Scenario: Battery-powered wearable ECG patch with low-power MCU and analog signal chain. IC Role / Device Role / Timing Role: Primary 1.8V supply for ADC reference and digital core, enabled only during measurement bursts. Use Value: 20µA quiescent current minimizes idle drain; 60dB PSRR isolates analog section from digital switching noise. |
| Laptop Subsystem Rail | Industrial PLC I/O Module |
|
Use Scenario: Providing 1.8V bias for PCIe Gen3 SerDes termination or eMMC interface logic. IC Role / Device Role / Timing Role: Point-of-load regulator delivering low-noise, fast-transient 1.8V from 3.3V or 5V motherboard rail. Use Value: 100µA–150mA load capability covers both idle and burst data transfer; 30µVRMS noise prevents bit errors. |
Use Scenario: Powering isolated 1.8V logic in DIN-rail mounted I/O modules operating from 24V DC field supply. IC Role / Device Role / Timing Role: Input-tolerant LDO converting unregulated 24V to stable 1.8V for FPGA configuration memory and level-shifters. Use Value: 24V max input rating avoids need for external TVS or Zener clamping; thermal shutdown prevents failure under overtemperature faults. |
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 |
|---|---|---|---|
| AP2210K-1.8TRG1 | Higher IOUT (250mA), higher dropout (150mV @ 100mA), same SOT-23-5 package. | Better suited for higher-current loads like FPGAs or multi-core MCUs where 150mA margin is insufficient. | Select when peak load exceeds 150mA but board space prohibits larger packages. |
| MCP1700T-1802E/TT | Lower IOUT (250mA), lower IQ (1.6µA), wider temp range (−40°C to +125°C), same 1.8V output. | Preferred for ultra-low-power, extended-temperature industrial deployments where <2µA standby is mandatory. | Choose when sub-2µA quiescent current outweighs need for 24V input capability. |
Compared with AP2204K-1.8TRG1, AP2210K-1.8TRG1 trades lower dropout for higher current drive, while MCP1700T-1802E/TT sacrifices 24V input headroom for nanoamp-level standby-making each optimal for distinct power budget and voltage rail constraints.
Availability
AP2204K-1.8TRG1 is available at Aetrix Electronics and suitable for USB peripheral power, portable medical sensors, laptop subsystem rails, and industrial PLC I/O modules requiring stable component supply with RoHS/Green compliance and tape-and-reel packaging.
Supply support for AP2204K-1.8TRG1 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 emphasis on power management, signal integrity, and protection solutions.
The AP2204 series belongs to Diodes' high-voltage ULDO regulator product line, engineered for battery-powered and wide-input industrial applications demanding low noise, high PSRR, and robust thermal protection.
FAQ
What is the minimum input voltage required for regulation at 1.8V output?
The minimum recommended input is the greater of 2.6V or VOUT + 1V - so 2.8V. Below this, the device enters dropout and cannot maintain 1.8V output accuracy. At 2.7V input, output may sag to ~1.7V depending on load and temperature.
Can AP2204K-1.8TRG1 be used with a 10µF tantalum output capacitor?
Yes, but not recommended. The datasheet specifies stability with low-ESR ceramic capacitors (≥2.2µF). Tantalum caps have higher ESR and risk oscillation or poor transient response; ceramic MLCCs ensure guaranteed phase margin and 30µVRMS noise performance.
Is the EN pin internally pulled down?
No. The EN pin has no internal pull-down; it must be actively driven high (≥2.0V) to enable regulation or pulled low (≤0.4V) to disable. Leaving it floating risks undefined operation and potential shoot-through or leakage paths.
Does AP2204K-1.8TRG1 support reverse polarity protection?
No. The device lacks integrated reverse-voltage blocking. Applying reversed input can damage the EPNP structure. External protection - such as a series Schottky diode or ideal diode controller - is required in systems with possible polarity reversal.
AP2204K-1.8TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 0.5V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- 2.5 mA
- PSRR:
- 60dB (100Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AP2204K-1.8TRG1 FAQ
1.How can I place an order for AP2204K-1.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2204K-1.8TRG1 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 AP2204K-1.8TRG1 reliable?
The price and inventory of AP2204K-1.8TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2204K-1.8TRG1 is usually 5 days.
3.What payment methods are accepted for AP2204K-1.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2204K-1.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2204K-1.8TRG1?
AP2204K-1.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2204K-1.8TRG1 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 AP2204K-1.8TRG1?
For technical support, including AP2204K-1.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2204K-1.8TRG1 requirements.
6.How does Aetrix verify that AP2204K-1.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2204K-1.8TRG1 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 AP2204K-1.8TRG1 meets industry standards.
7.What is the process for return or replacement of AP2204K-1.8TRG1?
All AP2204K-1.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2204K-1.8TRG1, 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 AP2204K-1.8TRG1 part is unused and in its original packaging.
Return procedure for AP2204K-1.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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