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Diodes Incorporated AP2120N-1.2TRG1
- Part No.:
- AP2120N-1.2TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2120N-1.2TRG1.pdf
- Description:
- IC REG LINEAR 1.2V 150MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:32,872
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Product details
Overview
AP2120N-1.2TRG1 from Diodes Incorporated is a high-speed, extremely low-noise 1.2V fixed-output CMOS LDO regulator in SOT-23 package, delivering ±2% output voltage accuracy, 15 µVrms noise (10 Hz–100 kHz), and 65 dB PSRR at 1 kHz. It supports up to 150 mA load current with dropout as low as 700 mV at 100 mA and operates from 2.2 V to 6 V input, making it suitable for powering precision analog circuitry in battery-powered portable devices.
For engineers reviewing the AP2120N-1.2TRG1 datasheet, AP2120N-1.2TRG1 pinout, AP2120N-1.2TRG1 application, or AP2120N-1.2TRG1 equivalent, key selection criteria include ultra-low noise performance, tight output voltage tolerance, compatibility with 1 µF ceramic capacitors, and thermal stability across –40°C to +85°C junction temperature range.
Technical Context
The AP2120N-1.2TRG1 integrates a precision voltage reference, error amplifier, resistor network for fixed 1.2 V output, and current-limit protection. Its CMOS process enables low quiescent current (25 µA typical) and excellent transient response without requiring external compensation.
It achieves high power supply rejection via internal feedback loop design optimized for 1 kHz ripple suppression, and maintains regulation under fast line/load transients due to its high-gain error amplifier and low-output-impedance pass element - critical for noise-sensitive RF and sensor biasing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2 V ±2% - ensures stable core/bias rail for low-voltage logic and analog ICs |
| Max Output Current | 150 mA - sufficient for powering microcontroller cores, ADC references, or RF front-end bias |
| Dropout Voltage | 700 mV @ 100 mA - enables operation from single-cell Li-ion (2.2 V min input) with margin |
| RMS Output Noise | 15 µVrms (10 Hz–100 kHz) - preserves signal integrity in audio, sensor, and PLL power domains |
| PSRR | 65 dB @ 1 kHz - suppresses switching noise from upstream DC/DC converters |
| Quiescent Current | 25 µA typical - extends battery life in always-on or low-duty-cycle portable systems |
| Input Voltage Range | 2.2 V to 6.0 V - compatible with single-cell Li-ion, NiMH, and regulated intermediate rails |
Pinout & Package
SOT-23 (N package), 3-pin surface-mount package with moisture sensitivity level 1 per J-STD-020; tin-plated leads, RoHS-compliant, weight ≈ 0.009 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for output current and internal bias; requires low-impedance PCB connection to minimize noise coupling |
| 2 VOUT | Regulated output | Delivers stable 1.2 V to load; must be decoupled with ≥1 µF ceramic capacitor close to pin |
| 3 VIN | Input supply | Accepts 2.2–6.0 V input; requires ≥1 µF ceramic input capacitor for stability and transient response |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise output | 15 µVrms at 1.2 V - enables clean power for high-resolution ADCs and low-phase-noise oscillators |
| Low ESR capacitor support | Stable with ≥1 µF ceramic capacitors (ESR 0.01–100 Ω) - eliminates need for bulk tantalum or electrolytic caps |
| High accuracy over temperature | ±2% initial tolerance, ±120 µV/°C tempco - maintains voltage integrity across –40°C to +85°C operating range |
| Fast transient response | Excellent line/load transient behavior - minimizes output sag during digital switching events |
| Low quiescent power | 25 µA IQ - reduces standby power loss in battery-backed real-time clocks and memory retention circuits |
Applications
| Mobile Phone Baseband Power | Wearable Sensor Bias Rail |
|---|---|
Use Scenario: Powering baseband processor I/O and memory interface circuitry in compact smartphones. IC Role / Device Role / Timing Role: Provides ultra-low-noise 1.2 V supply for DDR I/O termination and SerDes PHY analog blocks. Use Value: Prevents data corruption and jitter accumulation by rejecting noise from shared PMIC switchers and maintaining <±2% regulation during burst-mode transmission. |
Use Scenario: Supplying analog front-end of optical heart-rate sensors in fitness trackers. IC Role / Device Role / Timing Role: Delivers stable 1.2 V bias to photodiode amplifiers and low-noise instrumentation op-amps. Use Value: Enables sub-10 µV noise floor required for accurate DC-coupled biopotential measurement, unaffected by battery voltage decay. |
| Portable Medical Pulse Oximeter | IoT Edge Node MCU Core Rail |
Use Scenario: Powering red/IR LED drivers and ADC reference in handheld pulse oximeters. IC Role / Device Role / Timing Role: Supplies clean 1.2 V to precision current sources and 24-bit sigma-delta ADC reference buffer. Use Value: Ensures <0.1% SpO₂ measurement drift over battery discharge cycle and ambient temperature variation. |
Use Scenario: Providing core voltage to ARM Cortex-M0+ microcontrollers in battery-operated smart sensors. IC Role / Device Role / Timing Role: Acts as primary low-dropout regulator for CPU core, enabling operation down to 2.2 V input from coin cell or energy harvester. Use Value: Extends operational runtime by 30% vs. higher-IQ regulators while maintaining 1.2 V ±2% for reliable clock domain timing. |
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 |
|---|---|---|---|
| AP2112K-1.2TRG1 | Higher dropout (300 mV @ 100 mA), 30 µVrms noise, same SOT-23-3 package | Lower PSRR (55 dB @ 1 kHz); less suitable for RF/analog co-location | Select when cost priority outweighs noise/PSRR requirements and input headroom >2.5 V |
| MCP1700T-1202E/TT | 2.5 µA IQ, 170 mV dropout @ 250 mA, but 40 µVrms noise and ±2% tolerance | Slower load transient response; not qualified for extended industrial temp range | Prefer for ultra-low-power sleep modes where 15 µVrms noise is non-critical |
Compared with AP2120N-1.2TRG1, AP2112K-1.2TRG1 trades noise and PSRR for lower cost, while MCP1700T-1202E/TT prioritizes quiescent current over noise performance - making AP2120N-1.2TRG1 optimal for applications demanding simultaneous low noise, high PSRR, and tight voltage accuracy.
Availability
AP2120N-1.2TRG1 is available at Aetrix Electronics and suitable for mobile phone baseband power, wearable sensor bias rails, portable medical pulse oximeters, and IoT edge node MCU core supplies requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AP2120N-1.2TRG1 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-performance, energy-efficient components for consumer, industrial, and communications markets.
The AP2120 series belongs to Diodes' high-speed LDO regulator product line, designed specifically for noise-sensitive battery-powered applications requiring ultra-low output noise, fast transient response, and minimal board space.
FAQ
What is the minimum input voltage required for AP2120N-1.2TRG1 to maintain regulation?
The AP2120N-1.2TRG1 requires a minimum input voltage of 2.2 V to sustain 1.2 V output under full 150 mA load, based on its specified dropout characteristics. At 100 mA, dropout is typically 700 mV, so VIN ≥ 1.9 V is theoretically possible - but the datasheet specifies 2.2 V as the absolute minimum operating input voltage to guarantee performance across temperature and process variation.
Can AP2120N-1.2TRG1 be used with ceramic output capacitors smaller than 1 µF?
No - the datasheet explicitly requires ≥1 µF ceramic output capacitance for stability, with ESR between 0.01 Ω and 100 Ω. Using smaller capacitors risks oscillation or degraded transient response, as verified in the device's stability analysis and application circuit validation. The 1 µF minimum is mandatory, not optional.
Does AP2120N-1.2TRG1 include reverse polarity or overvoltage protection?
No - the AP2120N-1.2TRG1 lacks integrated reverse-polarity protection, overvoltage shutdown, or thermal foldback. It only includes current-limit protection (50 mA short-circuit limit) and operates within absolute maximum ratings (e.g., VIN ≤ 6.5 V). External protection circuitry must be added if those features are required in the system design.
Is AP2120N-1.2TRG1 qualified for automotive applications?
No - AP2120N-1.2TRG1 is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP2120Q series) with PPAP capability and IATF 16949 manufacturing, but this specific part number is intended for commercial/industrial portable electronics only.
AP2120N-1.2TRG1 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.9V @ 200mA
- 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-1.2TRG1 FAQ
1.How can I place an order for AP2120N-1.2TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2120N-1.2TRG1 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-1.2TRG1 reliable?
The price and inventory of AP2120N-1.2TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2120N-1.2TRG1 is usually 5 days.
3.What payment methods are accepted for AP2120N-1.2TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2120N-1.2TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2120N-1.2TRG1?
AP2120N-1.2TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2120N-1.2TRG1 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-1.2TRG1?
For technical support, including AP2120N-1.2TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2120N-1.2TRG1 requirements.
6.How does Aetrix verify that AP2120N-1.2TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2120N-1.2TRG1 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-1.2TRG1 meets industry standards.
7.What is the process for return or replacement of AP2120N-1.2TRG1?
All AP2120N-1.2TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2120N-1.2TRG1, 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-1.2TRG1 part is unused and in its original packaging.
Return procedure for AP2120N-1.2TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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