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Diodes Incorporated AP2120N-2.5TRG1
- Part No.:
- AP2120N-2.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2120N-2.5TRG1.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:10,710
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Product details
Overview
AP2120N-2.5TRG1 from Diodes Incorporated is a high-speed, extremely low-noise CMOS-based LDO regulator delivering 2.5V ±2% output at up to 150mA, with 200mV typical dropout at 100mA, 65dB PSRR at 1kHz, and 30µVrms output noise (10Hz–100kHz), optimized for powering RF sections and precision analog circuitry in portable battery-powered devices.
For engineers reviewing the AP2120N-2.5TRG1 datasheet, AP2120N-2.5TRG1 pinout, AP2120N-2.5TRG1 application, or AP2120N-2.5TRG1 equivalent, key selection criteria include ultra-low noise performance, compatibility with 1µF ceramic capacitors, tight output voltage accuracy, and operation across –40°C to +85°C junction temperature range.
Technical Context
The AP2120N-2.5TRG1 integrates a precision voltage reference, error amplifier, resistor network for fixed 2.5V output, and current-limit protection circuitry in a single CMOS die. Its architecture enables fast line and load transient response without external compensation.
It operates with input voltages from 2.0V to 6.0V and maintains regulation down to a 20mV dropout at light loads, scaling to 300mV at 150mA. The device uses a low-ESR capacitor-stable design requiring only 1µF input and output ceramics with ESR between 0.01Ω and 100Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±2% - ensures stable biasing for ADC references and RF synthesizers |
| Max Output Current | 150mA continuous - sufficient for powering microcontroller cores or sensor signal chains |
| Dropout Voltage | 200mV @ 100mA - enables operation from single Li-ion or two NiMH cells with margin |
| PSRR | 65dB @ 1kHz - suppresses switching noise from upstream DC/DC converters |
| Output Noise | 30µVrms (10Hz–100kHz) - preserves SNR in audio codecs and precision amplifiers |
| Quiescent Current | 25µA typical - extends battery life in always-on sensor nodes and standby circuits |
| Line Regulation | 4mV typical - minimizes output drift during battery discharge or input ripple |
| Load Regulation | 12mV typical - maintains voltage stability across dynamic current steps |
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 to clean system ground plane |
| 2 VOUT | Regulated output | Delivers stable 2.5V supply; requires ≥1µF ceramic capacitor placed adjacent to pin for stability |
| 3 VIN | Input voltage supply | Accepts 2.0–6.0V input; requires ≥1µF ceramic decoupling capacitor close to pin to suppress high-frequency noise |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise output | 30µVrms (10Hz–100kHz) - enables use in noise-sensitive analog front-ends without additional filtering |
| Ceramic capacitor compatibility | Stable with ≥1µF X5R/X7R ceramics (ESR 0.01–100Ω) - eliminates need for costly tantalum or electrolytic capacitors |
| High PSRR at 1kHz | 65dB - effectively isolates downstream circuitry from power rail disturbances |
| Precision output accuracy | ±2% over –40°C to +85°C - reduces calibration overhead in production test and field operation |
| Low quiescent current | 25µA typical - supports multi-year battery life in IoT endpoint applications |
| Fast transient response | Minimal undershoot/overshoot during 0→150mA load steps - maintains logic-level integrity for digital peripherals |
Applications
| RF Power Amplifier Biasing | Digital Audio Codec Supply |
|---|---|
|
Use Scenario: Providing clean, low-noise bias voltage to GaAs or SiGe RF power amplifiers in cellular handsets and Wi-Fi modules. IC Role / Device Role / Timing Role: LDO regulator supplying stable 2.5V VCC to PA driver stage, rejecting switching noise from PMIC buck converters. Use Value: 30µVrms noise and 65dB PSRR prevent AM-to-PM distortion and maintain EVM compliance under dynamic transmit conditions. |
Use Scenario: Powering delta-sigma audio ADC/DAC cores and headphone amplifiers in portable media players. IC Role / Device Role / Timing Role: Low-noise post-regulator for audio subsystem, decoupling noisy system rails while maintaining tight voltage tolerance. Use Value: ±2% output accuracy and minimal load regulation error preserve full-scale dynamic range and THD+N performance. |
| Medical Sensor Signal Chain | Industrial PLC Analog Input Module |
|
Use Scenario: Supplying reference voltage and op-amp rails for wearable ECG/PPG front-ends operating from coin-cell batteries. IC Role / Device Role / Timing Role: Primary analog supply LDO enabling sub-µV-level signal integrity in biopotential amplification paths. Use Value: 25µA quiescent current extends operational life beyond 12 months on CR2032, while 200mV dropout maximizes usable battery voltage range. |
Use Scenario: Generating isolated 2.5V reference for 16-bit SAR ADCs in programmable logic controller analog input cards. IC Role / Device Role / Timing Role: Precision voltage source for ADC reference buffer and signal conditioning op-amps in harsh industrial environments. Use Value: –40°C to +85°C operating range and 4mV line regulation ensure consistent measurement accuracy across wide ambient and supply variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/TT | 250mA rated, 1.6µA quiescent current, but 45µVrms noise and 55dB PSRR at 1kHz | Better for ultra-low-power sleep modes; less suitable for RF or high-SNR analog stages | Choose when quiescent current dominates over noise/PSRR requirements |
| Torex XC6206P252MR-G | 150mA rated, 35µVrms noise, 60dB PSRR, but ±3% output accuracy and no guaranteed –40°C operation | Acceptable for consumer-grade audio or non-critical digital I/O rails | Choose for cost-sensitive designs where ±2% accuracy and industrial temp range are not mandatory |
Compared with MCP1700T-2502E/TT and XC6206P252MR-G, the AP2120N-2.5TRG1 delivers superior noise/PSRR trade-offs and tighter accuracy across extended temperature, making it optimal for RF, precision analog, and industrial sensing where signal integrity is critical.
Availability
AP2120N-2.5TRG1 is available at Aetrix Electronics and suitable for mobile communications, portable medical instrumentation, industrial data acquisition, and battery-powered IoT edge nodes requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for AP2120N-2.5TRG1 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, automotive, and consumer markets.
The AP2120 series belongs to Diodes' precision LDO portfolio, engineered specifically for noise-sensitive battery-powered applications demanding ultra-low noise, high PSRR, and ceramic-capacitor stability without sacrificing accuracy or thermal robustness.
FAQ
What is the minimum input voltage required for AP2120N-2.5TRG1 to regulate at 2.5V?
The AP2120N-2.5TRG1 requires a minimum input voltage of 2.0V per recommended operating conditions. However, to maintain regulation at full 150mA load, VIN must exceed VOUT by at least the dropout voltage - 300mV typical at 150mA - so VIN ≥ 2.8V is required for full-load operation. At lighter loads (e.g., 10mA), dropout drops to 20mV, allowing regulation down to ~2.52V input.
Can AP2120N-2.5TRG1 be used with 0.47µF output capacitors?
No. The datasheet specifies a minimum output capacitance of 1µF with ESR between 0.01Ω and 100Ω for guaranteed stability. Using 0.47µF violates the stability requirement and may cause oscillation or poor transient response. Ceramic X5R/X7R 1µF capacitors are validated and recommended; smaller values are not supported.
Does AP2120N-2.5TRG1 include thermal shutdown or current limiting?
Yes. The device integrates both short-circuit current limiting (50mA typical limit when VOUT = 0V) and thermal shutdown protection. The absolute maximum junction temperature is +150°C, and the device disables output if internal die temperature exceeds safe operating limits, re-enabling once cooled below the hysteresis threshold.
Is AP2120N-2.5TRG1 qualified for automotive applications?
No. While the AP2120N-2.5TRG1 operates across –40°C to +85°C, it is not AEC-Q100 qualified and is not manufactured in an IATF 16949-certified facility. Diodes offers automotive-grade variants (e.g., AP2120Q series) with PPAP capability and AEC-Q100 stress testing; this part is intended for industrial and consumer applications only.
AP2120N-2.5TRG1 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):
- 2.5V
- 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-2.5TRG1 FAQ
1.How can I place an order for AP2120N-2.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2120N-2.5TRG1 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-2.5TRG1 reliable?
The price and inventory of AP2120N-2.5TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2120N-2.5TRG1 is usually 5 days.
3.What payment methods are accepted for AP2120N-2.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2120N-2.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2120N-2.5TRG1?
AP2120N-2.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2120N-2.5TRG1 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-2.5TRG1?
For technical support, including AP2120N-2.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2120N-2.5TRG1 requirements.
6.How does Aetrix verify that AP2120N-2.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2120N-2.5TRG1 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-2.5TRG1 meets industry standards.
7.What is the process for return or replacement of AP2120N-2.5TRG1?
All AP2120N-2.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2120N-2.5TRG1, 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-2.5TRG1 part is unused and in its original packaging.
Return procedure for AP2120N-2.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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