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Diodes Incorporated AP2120N-2.8TRG1
- Part No.:
- AP2120N-2.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2120N-2.8TRG1.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
AP2120N-2.8TRG1 from Diodes Incorporated is a high-speed, extremely low-noise CMOS-based positive LDO regulator delivering 2.8V ±2% output at up to 150mA, with 200mV typical dropout at 100mA, 65dB PSRR at 1kHz, and 30µVrms output noise (10Hz–100kHz), designed for powering noise-sensitive analog circuitry in portable battery-powered systems.
For engineers reviewing the AP2120N-2.8TRG1 datasheet, AP2120N-2.8TRG1 pinout, AP2120N-2.8TRG1 application, or AP2120N-2.8TRG1 equivalent, key selection criteria include ultra-low noise performance, SOT-23 footprint compatibility, load transient response under 150mA, and stability with 1µF ceramic output capacitors.
Technical Context
The AP2120N-2.8TRG1 integrates a precision voltage reference, error amplifier, feedback resistor network, and current-limit protection in a single CMOS IC. It operates across 3.3V–6V input range and maintains regulation down to 20mV dropout at light loads, scaling to 300mV at 150mA.
Its internal architecture enables excellent line regulation (4mV typical) and load regulation (12mV typical) over –40°C to +85°C, with temperature coefficient of ±280µV/°C and full compatibility with low-ESR ceramic capacitors ≥1µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8V ±2% - ensures stable biasing for 2.8V logic rails and analog sensors without external trimming. |
| Max Output Current | 150mA continuous - supports moderate-power microcontrollers, RF front-ends, and ADC/DAC subsystems. |
| Dropout Voltage | 200mV @ 100mA - enables operation from single-cell Li-ion (3.0V min) or two-cell alkaline sources. |
| PSRR | 65dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 30µVrms (10Hz–100kHz) - preserves SNR in audio codecs, precision ADCs, and RF synthesizer VCO supplies. |
| Quiescent Current | 25µA typical - extends battery life in always-on sensor nodes and standby power domains. |
| Operating Temp | –40°C to +85°C - qualified for industrial and consumer portable equipment environments. |
Pinout & Package
SOT-23 (N package), 3-pin surface-mount, moisture sensitivity level 1 per J-STD-020, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for output current and internal bias; requires low-impedance PCB connection to minimize noise coupling. |
| 2 VOUT | Regulated output | Delivers stable 2.8V supply; must be decoupled with ≥1µF ceramic capacitor placed adjacent to pin. |
| 3 VIN | Input voltage supply | Accepts 3.3V–6V input; requires ≥1µF ceramic input capacitor to suppress high-frequency ripple and ensure stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 30µVrms output noise enables clean power for RF VCOs and high-resolution SAR ADCs. |
| Low-ESR capacitor support | Stable with 1µF ceramic capacitors (0.01Ω–100Ω ESR), reducing BOM count and board space vs. tantalum alternatives. |
| High PSRR at audio frequencies | 65dB rejection at 1kHz allows direct use after noisy buck converters in mixed-signal SoC power trees. |
| Precision output accuracy | ±2% initial tolerance minimizes need for post-production calibration in voltage-critical analog signal chains. |
| Fast transient response | Excellent load and line transient behavior maintains <±50mV deviation during 0→150mA step changes. |
Applications
| Mobile Phone Baseband Power | Portable Audio Codec Supply |
|---|---|
Use Scenario: Powering baseband processor I/O and memory interface circuits in slim smartphone designs. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying core logic and DDR I/O banks requiring tight voltage tolerance and low noise. Use Value: Maintains signal integrity during burst data transfers by suppressing supply-induced jitter and crosstalk. |
Use Scenario: Providing clean analog supply to stereo audio DACs and headphone amplifiers in Bluetooth earbuds. IC Role / Device Role / Timing Role: Low-noise post-regulator for DAC reference and analog output stage, decoupling from noisy system DC/DC. Use Value: Reduces audible hiss and improves THD+N by limiting broadband noise contribution to <30µVrms. |
| Wireless Sensor Node MCU Core | Industrial Camera Image Sensor Bias |
Use Scenario: Supplying 2.8V core voltage to ultra-low-power ARM Cortex-M0+ microcontrollers in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and sensor interface power during deep-sleep modes. Use Value: 25µA quiescent current extends 10-year battery life in sealed environmental monitoring deployments. |
Use Scenario: Delivering regulated 2.8V bias to CMOS image sensor analog front-end and column ADC drivers. IC Role / Device Role / Timing Role: Precision analog rail generator ensuring consistent pixel response and dark-current stability. Use Value: ±2% output accuracy and ±280µV/°C tempco prevent thermal drift-induced fixed-pattern noise in raw image data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 300mA rated, 1.6µA IQ, but 115µVrms noise - 3.8× higher than AP2120N-2.8TRG1. | Better for ultra-low-IQ sleep modes; unsuitable for noise-critical analog rails. | Select when quiescent current dominates design priority over noise performance. |
| Torex XC6206P282MR-G | 150mA rated, 2.5µVrms noise, but only 50dB PSRR at 1kHz and requires ≥2.2µF output capacitance. | Superior noise floor, but weaker ripple rejection and stricter capacitor requirements limit flexibility. | Select when lowest possible noise is mandatory and input ripple is minimal or pre-filtered. |
Compared with MCP1700T-2802E/TT and XC6206P282MR-G, the AP2120N-2.8TRG1 uniquely balances ultra-low noise (30µVrms), high PSRR (65dB), and 1µF ceramic compatibility-making it optimal for mixed-signal systems where both noise and ripple rejection matter.
Availability
AP2120N-2.8TRG1 is available at Aetrix Electronics and suitable for mobile phone baseband power, portable audio codec supply, wireless sensor node MCU core, and industrial camera image sensor bias requiring stable component supply across production volumes and long-lifecycle programs.
Supply support for AP2120N-2.8TRG1 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-performance power management, signal integrity, and protection solutions for industrial, consumer, and communications markets.
The AP2120 series belongs to Diodes' precision LDO portfolio, engineered specifically for battery-powered portable electronics demanding ultra-low noise, fast transient response, and minimal external component count.
FAQ
What is the minimum input voltage required for AP2120N-2.8TRG1 to maintain regulation?
The AP2120N-2.8TRG1 requires a minimum input voltage of 3.3V to sustain 2.8V output under full 150mA load, based on its maximum dropout of 500mV at that current. At lighter loads (e.g., 10mA), regulation is maintained down to 2.82V input due to 20mV typical dropout. Input below 3.3V may cause dropout in high-current operation.
Can AP2120N-2.8TRG1 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 violates this requirement and risks oscillation or poor transient response. Ceramic capacitors of exactly 1µF (X5R/X7R, 0603 or larger) are validated and recommended.
Is AP2120N-2.8TRG1 qualified for automotive applications?
No - AP2120N-2.8TRG1 is specified for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7361Q series) with PPAP support and IATF 16949 manufacturing, but AP2120N-2.8TRG1 is intended for consumer and industrial portable equipment only.
How does the 25µA quiescent current impact battery runtime in a 10mA average-load application?
At 25µA IQ, the AP2120N-2.8TRG1 consumes 0.25% of the total 10mA load current - adding negligible overhead. In a 200mAh coin cell, this extends theoretical runtime by less than 1 hour over 3 years of operation, confirming its suitability for long-life energy harvesting and sensor node designs where ultra-low IQ is secondary to noise performance.
AP2120N-2.8TRG1 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):
- 2.8V
- 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-2.8TRG1 FAQ
1.How can I place an order for AP2120N-2.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2120N-2.8TRG1 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-2.8TRG1 reliable?
The price and inventory of AP2120N-2.8TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2120N-2.8TRG1 is usually 5 days.
3.What payment methods are accepted for AP2120N-2.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2120N-2.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2120N-2.8TRG1?
AP2120N-2.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2120N-2.8TRG1 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-2.8TRG1?
For technical support, including AP2120N-2.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2120N-2.8TRG1 requirements.
6.How does Aetrix verify that AP2120N-2.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2120N-2.8TRG1 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-2.8TRG1 meets industry standards.
7.What is the process for return or replacement of AP2120N-2.8TRG1?
All AP2120N-2.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2120N-2.8TRG1, 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-2.8TRG1 part is unused and in its original packaging.
Return procedure for AP2120N-2.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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