My Inquiry
My Account
Diodes Incorporated AP2138N-3.0TRG1
- Part No.:
- AP2138N-3.0TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2138N-3.0TRG1.pdf
- Description:
- IC REG LINEAR 3V 250MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:40,443
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP2138N-3.0TRG1 from Diodes Incorporated is a fixed-output 3.0V CMOS low-dropout linear regulator in SOT-23-3 package, delivering 250mA output current with ±2% output voltage accuracy and ultra-low 1.0µA typical quiescent current. It operates from 2.5V to 6.0V input, achieves 25mV typical dropout at 10mA, and targets battery-powered portable electronics requiring stable, low-power voltage regulation.
For engineers reviewing the AP2138N-3.0TRG1 datasheet, AP2138N-3.0TRG1 pinout, AP2138N-3.0TRG1 application, or AP2138N-3.0TRG1 equivalent, key selection criteria include quiescent current budget, dropout performance at light-to-moderate load, output voltage tolerance over temperature, and SOT-23-3 thermal resistance (θJA = 250°C/W).
Technical Context
The AP2138N-3.0TRG1 integrates a precision voltage reference, error amplifier, feedback resistor network, and current-limit protection circuit in a single CMOS die. Its architecture delivers high DC accuracy without external components while maintaining stability with ≥1µF ceramic output capacitance (ESR 0.01–100Ω).
No enable or discharge functionality is present-this is a three-terminal, always-on LDO. The device lacks CE pin or quick-discharge circuitry, distinguishing it from the AP2139 series and confirming its role as a minimal-footprint, low-quiescent-current power rail generator for space-constrained portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±2% (2.94–3.06V) - ensures compatible logic-level supply for 3.0V I/O domains across temperature and line/load variation. |
| Quiescent Current | 1.0µA typical - enables multi-year battery life in always-on sensor nodes or standby circuits with microamp-level system budgets. |
| Max Output Current | 250mA - supports moderate-power peripherals such as Bluetooth radios, small displays, or MCU cores without external pass devices. |
| Dropout Voltage | 25mV typical at 10mA; 450mV typical at 250mA - allows operation from single-cell Li-ion (3.0–4.2V) or two-cell alkaline (2.4–3.2V) sources with minimal headroom loss. |
| Line Regulation | 6mV typical (2.5–6.0V input range) - maintains tight output stability despite battery voltage sag or supply ripple. |
| Load Regulation | 25mV typical (1–100mA load step) - prevents voltage droop during burst-mode operation of digital loads. |
| Temp Coefficient | ±100ppm/°C - contributes ≤±0.75mV/°C drift over –40°C to +85°C, critical for precision analog or reference applications. |
Pinout & Package
SOT-23-3 package: 1.2mm × 2.2mm footprint, 0.95mm height, thermally enhanced leadframe with exposed pad (not electrically connected). Thermal resistance θJA = 250°C/W, θJC = 81.9°C/W.
| 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 and thermal rise. |
| 2 (VOUT) | Regulated output | Delivers stable 3.0V to load; must be decoupled with ≥1µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| 3 (VIN) | Input supply | Accepts 2.5–6.0V unregulated input; requires ≥1µF ceramic input capacitor close to pin to suppress source impedance and ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typical enables >10-year battery life in coin-cell-powered IoT sensors operating at 1µA average system current. |
| High output accuracy | ±2% over full temperature and load range ensures reliable interface with 3.0V logic families (e.g., SPI peripherals, ADC references) without calibration. |
| Low dropout performance | 25mV at 10mA allows direct regulation from partially discharged Li-ion cells (≥3.025V), extending usable battery capacity. |
| Stable with ceramic capacitors | Guaranteed stability with 1µF–10µF X5R/X7R ceramics (ESR 0.01–100Ω), eliminating need for costly tantalum or electrolytic capacitors. |
| Robust thermal design | θJC = 81.9°C/W enables 250mA continuous operation at TA = +85°C with minimal derating when mounted on 1-in² 2-oz copper. |
Applications
| Wearable Health Monitor | Smart Remote Control |
|---|---|
Use Scenario: Continuous ECG signal acquisition powered by CR2032 coin cell with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Primary 3.0V supply for ultra-low-power MCU, analog front-end, and BLE radio transceiver. Use Value: 1.0µA IQ minimizes standby drain; ±2% VOUT ensures accurate ADC reference and consistent BLE transmit power across battery discharge. |
Use Scenario: IR remote with motion wake-up and RF pairing, operating from two AAA alkaline cells. IC Role / Device Role / Timing Role: Always-on 3.0V rail for accelerometer, RTC, and low-power MCU in deep-sleep mode. Use Value: 25mV dropout at 10µA load extends operational life into final battery voltage (≈2.4V), avoiding premature shutdown. |
| Industrial Sensor Node | Portable Barcode Scanner |
Use Scenario: Battery-powered temperature/humidity node deployed in remote locations with 5-year maintenance interval. IC Role / Device Role / Timing Role: Stable 3.0V supply for precision analog sensor conditioning and LoRaWAN transceiver. Use Value: ±100ppm/°C tempco limits VOUT drift to <±0.25mV over –40°C to +85°C, preserving sensor measurement integrity. |
Use Scenario: Handheld scanner using single-cell Li-ion with aggressive duty cycling (1s active / 59s sleep). IC Role / Device Role / Timing Role: Main 3.0V rail for imaging sensor, laser diode driver, and decode engine. Use Value: 250mA peak current capability supports 500ms laser pulse without brownout; 450mV dropout at 250mA ensures operation down to 3.45V battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7354-30SAG-7 | Successor LDO with same 3.0V output, 300mA rating, 0.6µA IQ, and improved PSRR (60dB @ 1kHz); SOT-23-3 pinout compatible. | Supports higher peak loads and lower noise-sensitive analog stages; recommended for new designs per Diodes' obsolescence notice. | Select when upgrading legacy designs or requiring lower IQ, better noise rejection, or extended lifecycle support. |
| MCP1700-3002E/TO | Microchip's 3.0V LDO: 250mA, 1.6µA IQ, ±2% accuracy, SOT-23-3; higher dropout (115mV @ 10mA) and lower PSRR. | Valid for cost-sensitive consumer products where 1.6µA IQ remains acceptable and dropout margin is sufficient. | Choose only if AP7354 is unavailable and system dropout budget exceeds 115mV at 10mA. |
Compared with AP2138N-3.0TRG1, AP7354-30SAG-7 reduces quiescent current by 40% and improves noise immunity, while MCP1700-3002E/TO trades higher IQ and worse dropout for broad second-source availability-but neither matches the original's 25mV ultra-low-dropout performance at light load.
Availability
AP2138N-3.0TRG1 is available at Aetrix Electronics and suitable for wearable health monitors, smart remote controls, industrial sensor nodes, and portable barcode scanners requiring stable component supply with long-term traceability.
Supply support for AP2138N-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP2138 series belongs to Diodes' ultra-low-IQ LDO product line, engineered specifically for battery-powered portable electronics where multi-year operational life and minimal voltage headroom are mandatory design constraints.
FAQ
What is the maximum input voltage rating for AP2138N-3.0TRG1?
The absolute maximum input voltage is 6.6V, but the recommended operating range is 2.5V to 6.0V. Exceeding 6.0V risks accelerated parametric shift and reduced reliability, especially at elevated temperatures. Operation above 6.0V is not characterized and violates the Recommended Operating Conditions table in DS37428 Rev. 6-3.
Does AP2138N-3.0TRG1 require an external enable signal or support shutdown mode?
No. AP2138N-3.0TRG1 has no enable (CE) pin and operates continuously when VIN is within specification. It is a three-terminal LDO without logic control-unlike the AP2139 series, which adds CE and quick-discharge functionality. Shutdown capability is not supported.
What output capacitor value and type are required for stable operation?
A minimum 1µF ceramic capacitor (X5R or X7R dielectric) with ESR between 0.01Ω and 100Ω is required at VOUT for guaranteed stability. Diodes specifies this in the Typical Applications Circuit note and Electrical Characteristics tables. Tantalum or aluminum electrolytic capacitors are not recommended due to ESR and aging concerns.
Is AP2138N-3.0TRG1 qualified for automotive applications?
No. AP2138N-3.0TRG1 is not AEC-Q100 qualified and is not manufactured in an IATF 16949-certified facility. Diodes explicitly states that automotive-grade versions require separate part numbers and PPAP-capable change control-this variant is intended for commercial and industrial portable equipment only.
AP2138N-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):
- 0.7V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 1.5 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP2138N-3.0TRG1 FAQ
1.How can I place an order for AP2138N-3.0TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2138N-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 AP2138N-3.0TRG1 reliable?
The price and inventory of AP2138N-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 AP2138N-3.0TRG1 is usually 5 days.
3.What payment methods are accepted for AP2138N-3.0TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2138N-3.0TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2138N-3.0TRG1?
AP2138N-3.0TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2138N-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 AP2138N-3.0TRG1?
For technical support, including AP2138N-3.0TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2138N-3.0TRG1 requirements.
6.How does Aetrix verify that AP2138N-3.0TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2138N-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 AP2138N-3.0TRG1 meets industry standards.
7.What is the process for return or replacement of AP2138N-3.0TRG1?
All AP2138N-3.0TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2138N-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 AP2138N-3.0TRG1 part is unused and in its original packaging.
Return procedure for AP2138N-3.0TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP2138N-3.0TRG1 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
