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Diodes Incorporated AP2125N-3.0TRG1
- Part No.:
- AP2125N-3.0TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2125N-3.0TRG1.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:19,416
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Product details
Overview
AP2125N-3.0TRG1 from Diodes Incorporated is a 300mA, fixed-output 3.0V CMOS low-dropout linear regulator in SOT-23-3 package, featuring 65mV dropout at 100mA, ±2% output voltage accuracy, and 50µVrms output noise. It integrates enable control, over-temperature shutdown, and current limiting for battery-powered portable electronics requiring stable, ultra-low-noise power.
For engineers reviewing the AP2125N-3.0TRG1 datasheet, AP2125N-3.0TRG1 pinout, AP2125N-3.0TRG1 application, or AP2125N-3.0TRG1 equivalent, key selection criteria include dropout performance at 300mA load, standby current under 0.01µA, PSRR of 65dB at 1kHz, compatibility with ceramic capacitors, and thermal shutdown at +160°C.
Technical Context
The AP2125N-3.0TRG1 uses a CMOS-based error amplifier and precision voltage reference to regulate output with high line/load regulation (±1mV/±12mV) and low temperature coefficient (±100ppm/°C). Its internal OTSD circuit activates at +160°C with +25°C hysteresis, ensuring safe operation during thermal overload.
It operates from 4.0V to 6V input across –40°C to +85°C ambient, delivering up to 300mA while maintaining 3.0V ±2% output. The CE pin enables active-high control with 1.5V logic-high threshold and 0.4V logic-low threshold, supporting low-power shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±2% - ensures stable supply for 3.0V logic rails and analog sensors without external trimming. |
| Max Output Current | 300mA minimum - supports moderate-power microcontrollers, RF modules, and display drivers. |
| Dropout Voltage | 65mV at 100mA - enables operation with minimal headroom (e.g., 3.0V out from 3.1V Li-ion cell). |
| RMS Output Noise | 50µVrms (10Hz–100kHz) - critical for noise-sensitive analog circuits like ADCs and audio codecs. |
| PSRR | 65dB at 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Quiescent Current | 60µA typical - extends battery life in always-on monitoring applications. |
| Standby Current | 0.01µA typical - enables multi-year shelf life in IoT endpoint sleep modes. |
| Thermal Shutdown | +160°C activation with +25°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
SOT-23-3 package: 3-pin surface-mount, lead-free, RoHS-compliant, footprint compatible with industry-standard PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 4.0V–6.0V input; requires ≥1µF ceramic capacitor for stability. |
| GND | Ground reference | Common return path for input/output currents and internal bias networks. |
| VOUT | Regulated output | Delivers 3.0V ±2% to load; requires ≥1µF ceramic capacitor with ESR <1Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 50µVrms output noise enables clean power for precision analog front-ends. |
| High PSRR at 1kHz | 65dB rejection of ripple from switching regulators improves system-level EMI margin. |
| Sub-µA standby current | 0.01µA shutdown current minimizes battery drain in long-duration sleep states. |
| Ceramic capacitor compatible | No electrolytic or tantalum required - reduces board area and improves reliability. |
| Integrated protection | Current limit (50mA short-circuit), thermal shutdown (+160°C), and overvoltage-safe CE pin. |
Applications
| CDMA/GSM Handsets | Laptops & Notebooks |
|---|---|
|
Use Scenario: Powering baseband processors and RF transceivers in dual-mode cellular handsets. IC Role / Device Role / Timing Role: Primary 3.0V LDO supplying core logic and analog blocks with ultra-low noise. Use Value: 50µVrms noise prevents RF desensitization and maintains receiver sensitivity. |
Use Scenario: Supplying USB controller, touchpad, and embedded controller subsystems. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from main DC-DC converter. Use Value: 65mV dropout allows efficient use of partially discharged batteries during runtime. |
| Hand-held Instruments | PCMCIA Cards |
|
Use Scenario: Providing precision analog supply for multimeter front-end amplifiers and ADC references. IC Role / Device Role / Timing Role: Low-noise, high-accuracy voltage source for measurement signal chains. Use Value: ±2% output accuracy and ±100ppm/°C drift ensure calibrated readings across temperature. |
Use Scenario: Regulating 3.0V I/O interface power for hot-pluggable PCMCIA memory and modem cards. IC Role / Device Role / Timing Role: Enable-controlled power domain isolating card logic from host bus. Use Value: 0.01µA standby current prevents battery drain when card is ejected but slot remains powered. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2112K-3.0TRG1 | SOT-23-5 package with CE and NC pins; same 3.0V/300mA spec but higher quiescent current (85µA typ) | Requires 5-pin layout; supports explicit enable control and improved thermal dissipation | Select when board layout accommodates SOT-23-5 and CE functionality is required |
| MCP1700T-3002E/TT | 250mA max output, 1.6µA quiescent current, no thermal shutdown, SOT-23-3 package | Lower current capability and missing OTSD; suited for ultra-low-power sensor nodes only | Select only for sub-250mA loads where 1.6µA IQ outweighs need for thermal protection |
Compared with AP2112K-3.0TRG1, the AP2125N-3.0TRG1 offers lower quiescent current and smaller footprint but lacks dedicated enable control; versus MCP1700T-3002E/TT, it delivers higher current and integrated thermal safety at the cost of slightly higher IQ.
Availability
AP2125N-3.0TRG1 is available at Aetrix Electronics and suitable for CDMA/GSM handsets, handheld instruments, laptops, and PCMCIA cards requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.
Supply support for AP2125N-3.0TRG1 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 power management, signal integrity, and protection solutions for high-volume electronics markets.
The AP2125 series belongs to Diodes' high-performance LDO portfolio, designed specifically for battery-powered portable equipment demanding ultra-low noise, low dropout, and robust thermal protection.
FAQ
What is the minimum input voltage required for regulation at full 300mA load?
The AP2125N-3.0TRG1 requires VIN ≥ VOUT + VDROP = 3.0V + 200mV = 3.2V to maintain regulation at 300mA, per electrical characteristics (VDROP = 200mV max at IOUT = 300mA). At room temperature and 100mA load, dropout is 65mV, allowing operation from 3.065V input.
Can this LDO be used with ceramic output capacitors less than 1µF?
No - the datasheet specifies 1µF minimum ceramic capacitor on VOUT for stability. Using smaller values risks oscillation due to insufficient phase margin; ESR must remain below 1Ω, which standard X5R/X7R ceramics meet at 1µF and above.
Does the AP2125N-3.0TRG1 have reverse current protection?
No - the device lacks internal reverse-current blocking. If VIN drops below VOUT while the output remains biased (e.g., by another supply), current can flow backward from VOUT to VIN. An external Schottky diode in series with VIN is recommended in such systems.
How does the CE pin behave during power-up and brown-out conditions?
The CE pin has 1.5V logic-high threshold and 0.4V logic-low threshold. During power-up, the regulator remains disabled until VIN reaches ~2.5V and CE exceeds 1.5V. During brown-out, output shuts down when CE falls below 0.4V, preventing erratic behavior during unstable supply transitions.
AP2125N-3.0TRG1 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):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (100Hz ~ 1kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP2125N-3.0TRG1 FAQ
1.How can I place an order for AP2125N-3.0TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2125N-3.0TRG1 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 AP2125N-3.0TRG1 reliable?
The price and inventory of AP2125N-3.0TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2125N-3.0TRG1 is usually 5 days.
3.What payment methods are accepted for AP2125N-3.0TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2125N-3.0TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2125N-3.0TRG1?
AP2125N-3.0TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2125N-3.0TRG1 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 AP2125N-3.0TRG1?
For technical support, including AP2125N-3.0TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2125N-3.0TRG1 requirements.
6.How does Aetrix verify that AP2125N-3.0TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2125N-3.0TRG1 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 AP2125N-3.0TRG1 meets industry standards.
7.What is the process for return or replacement of AP2125N-3.0TRG1?
All AP2125N-3.0TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2125N-3.0TRG1, 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 AP2125N-3.0TRG1 part is unused and in its original packaging.
Return procedure for AP2125N-3.0TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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