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Diodes Incorporated AP2120N-1.8TRG1
- Part No.:
- AP2120N-1.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2120N-1.8TRG1.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:7,657
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Product details
Overview
AP2120N-1.8TRG1 from Diodes Incorporated is a high-speed, extremely low-noise CMOS-based positive LDO regulator delivering 1.8V output at up to 150mA, with 200mV typical dropout at 100mA, 25µA quiescent current, and 30µVrms output noise (10Hz–100kHz). It serves as a precision local power supply for RF analog circuitry, low-voltage microcontrollers, and sensor signal chains in portable battery-powered systems.
For engineers reviewing the AP2120N-1.8TRG1 datasheet, AP2120N-1.8TRG1 pinout, AP2120N-1.8TRG1 application, or AP2120N-1.8TRG1 equivalent, key selection criteria include dropout voltage under load, PSRR at 1kHz (65dB typ), output voltage accuracy (±2%), thermal performance in SOT-23, and compatibility with 1µF ceramic output capacitors.
Technical Context
The AP2120N-1.8TRG1 integrates a precision voltage reference, error amplifier, resistor feedback network, and current-limit protection circuit in a single CMOS die. Its architecture enables fast line and load transient response while maintaining stability with low-ESR ceramic capacitors down to 1µF.
It operates across an input range of 2.0V to 6.0V and delivers regulated 1.8V output with ±2% initial accuracy, ±100ppm/°C temperature coefficient, and 4mV typical line regulation over VIN = 2.3V–6.0V. The device is rated for –40°C to +85°C junction operation and features 250°C/W θJA in SOT-23.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V ±2% - Ensures stable core/sensor bias within tight tolerance across temperature and load. |
| Max Output Current | 150mA continuous - Supports moderate-power digital logic or analog front-ends without thermal shutdown. |
| Dropout Voltage | 200mV typ @ 100mA - Enables operation from 2.0V input (e.g., single Li-ion cell post-discharge) while sustaining 1.8V output. |
| PSRR | 65dB typ @ 1kHz - Suppresses switching noise from upstream DC/DC converters feeding sensitive RF or ADC stages. |
| Output Noise | 30µVrms (10Hz–100kHz) - Minimizes jitter and SNR degradation in clock buffers, PLLs, and audio codecs. |
| Quiescent Current | 25µA typ - Extends battery life in always-on sensor nodes and standby modes of portable devices. |
| Input Voltage Range | 2.0V to 6.0V - Compatible with single-cell Li-ion (2.7–4.2V), 3.3V rails, and 5V systems with margin. |
Pinout & Package
SOT-23 (N package), 3-pin surface-mount, moisture sensitivity level 1 per J-STD-020, lead-free and RoHS compliant, 0.009g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Low-impedance return path for output current and internal bias; must be connected directly to system ground plane. |
| 2 VOUT | Regulated output | Delivers stable 1.8V to load; requires ≥1µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| 3 VIN | Input supply | Accepts 2.0–6.0V unregulated input; requires ≥1µF ceramic decoupling capacitor close to pin to suppress high-frequency ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVrms output noise enables clean power for RF transceivers and precision ADCs without additional filtering. |
| Ultra-low quiescent current | 25µA typical draw allows >1-year battery life in coin-cell-powered IoT sensors operating intermittently. |
| Ceramic capacitor compatibility | Stable with ≥1µF X5R/X7R ceramics (ESR 0.01–100Ω), eliminating need for bulkier tantalum or electrolytic capacitors. |
| High PSRR at audio frequencies | 65dB rejection at 1kHz prevents audible noise coupling into audio amplifiers or DAC output stages. |
| Precision output accuracy | ±2% initial tolerance ensures reliable startup and operation of 1.8V I/O domains in FPGAs and microcontrollers. |
Applications
| RF Front-End Power | Low-Voltage Microcontroller Core |
|---|---|
|
Use Scenario: Powering LNA, mixer, and VCO bias circuits in Bluetooth/Wi-Fi modules. IC Role / Device Role / Timing Role: Local ultra-low-noise LDO supplying clean 1.8V to analog RF blocks. Use Value: 30µVrms noise and 65dB PSRR prevent phase noise degradation and spurious emissions. |
Use Scenario: Supplying core voltage to ARM Cortex-M0+/M3 microcontrollers in wearables. IC Role / Device Role / Timing Role: Primary 1.8V core regulator enabling sub-100µA sleep current and fast wake-up. Use Value: 25µA quiescent current and 200mV dropout extend runtime on single-cell lithium batteries. |
| Portable Sensor Signal Chain | Camera Module Bias Supply |
|
Use Scenario: Powering MEMS accelerometers, gyroscopes, and analog front-end ICs in handheld devices. IC Role / Device Role / Timing Role: Low-drift, low-noise 1.8V rail for precision sensor excitation and ADC reference. Use Value: ±2% accuracy and ±100ppm/°C tempco ensure consistent sensor calibration across operating temperature. |
Use Scenario: Providing stable 1.8V to image sensor I/O and timing controller logic in smartphone cameras. IC Role / Device Role / Timing Role: Dedicated LDO for noise-sensitive camera interface (MIPI D-PHY, CSI-2). Use Value: Fast load transient response prevents frame corruption during burst capture and auto-focus sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 250mV dropout @ 100mA; 1.8V ±1%; 3.5µVrms noise (lower than AP2120N-1.8TRG1) | Optimized for ultra-low-noise analog; lacks current limit circuitry found in AP2120 | Prefer when noise is critical and external current limiting is acceptable. |
| Torex XC6206P182MR-G | 200mV dropout @ 100mA; 1.8V ±2%; 40µVrms noise; 1.5µA quiescent current (lower IQ) | Better IQ for long-term battery use but higher noise and no short-circuit protection | Prefer for ultra-low-power sensor nodes where noise <40µVrms is acceptable. |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the AP2120N-1.8TRG1 offers integrated current limiting and balanced performance across noise (30µVrms), dropout (200mV), and IQ (25µA), making it suitable for robust, general-purpose 1.8V LDO applications requiring fault protection.
Availability
AP2120N-1.8TRG1 is available at Aetrix Electronics and suitable for portable medical monitors, wireless sensor networks, and industrial handheld terminals requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for AP2120N-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP2120 series belongs to Diodes' high-performance LDO portfolio, designed specifically for battery-powered and noise-sensitive applications demanding low dropout, ultra-low noise, and ceramic-capacitor stability.
FAQ
What is the minimum input voltage required for AP2120N-1.8TRG1 to maintain regulation?
The AP2120N-1.8TRG1 maintains regulation down to 2.0V input, as specified in Recommended Operating Conditions. At 100mA load, its typical dropout is 200mV, so VIN ≥ 2.0V ensures VOUT remains within ±2% of 1.8V across –40°C to +85°C.
Can AP2120N-1.8TRG1 be used with a 0.47µF output capacitor?
No - the datasheet specifies a minimum output capacitance of 1µF with ESR between 0.01Ω and 100Ω for guaranteed stability. Using 0.47µF risks oscillation or poor transient response; 1µF X5R ceramic is the validated minimum.
Does AP2120N-1.8TRG1 include thermal shutdown protection?
Yes - the device incorporates thermal foldback and shutdown circuitry. When junction temperature exceeds +150°C (Absolute Maximum Rating), output current is reduced to prevent damage; recovery occurs automatically upon cooling below the thermal threshold.
Is AP2120N-1.8TRG1 qualified for automotive applications?
No - AP2120N-1.8TRG1 is rated for –40°C to +85°C operation and is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP2120Q series) with PPAP capability and IATF 16949 manufacturing, but this part is intended for commercial/industrial use only.
AP2120N-1.8TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- 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):
- -
- PSRR:
- 65dB (1kHz)
- Control Features:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP2120N-1.8TRG1 FAQ
1.How can I place an order for AP2120N-1.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2120N-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 AP2120N-1.8TRG1 reliable?
The price and inventory of AP2120N-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 AP2120N-1.8TRG1 is usually 5 days.
3.What payment methods are accepted for AP2120N-1.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2120N-1.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2120N-1.8TRG1?
AP2120N-1.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2120N-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 AP2120N-1.8TRG1?
For technical support, including AP2120N-1.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2120N-1.8TRG1 requirements.
6.How does Aetrix verify that AP2120N-1.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2120N-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 AP2120N-1.8TRG1 meets industry standards.
7.What is the process for return or replacement of AP2120N-1.8TRG1?
All AP2120N-1.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2120N-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 AP2120N-1.8TRG1 part is unused and in its original packaging.
Return procedure for AP2120N-1.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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