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Diodes Incorporated AP2138R-3.0TRG1
- Part No.:
- AP2138R-3.0TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP2138R-3.0TRG1.pdf
- Description:
- IC REG LINEAR 3V 250MA SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:4,008
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Product details
Overview
AP2138R-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, ultra-low 1.0µA typical quiescent current, and 25mV typical dropout at 10mA - optimized for battery-powered portable electronics requiring long standby life.
For engineers reviewing the AP2138R-3.0TRG1 datasheet, AP2138R-3.0TRG1 pinout, AP2138R-3.0TRG1 application, or AP2138R-3.0TRG1 equivalent, key selection criteria include quiescent current vs. load, dropout behavior at 100mA, thermal resistance (θJA = 250°C/W), output voltage temperature coefficient (±100ppm/°C), and compatibility with 1µF ceramic input/output capacitors.
Technical Context
This LDO integrates a precision voltage reference, error amplifier, feedback resistor network, and current-limit protection circuit. It operates across 2.5V–6.0V input range and maintains regulation over –40°C to +85°C ambient temperature with ±100ppm/°C output voltage drift.
No enable or discharge functionality is present - the AP2138R-3.0TRG1 is a 3-pin non-adjustable regulator (VIN, VOUT, GND) without logic control. Its 250mA output capability and 25mV dropout at light load support efficient power delivery in space-constrained, low-power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±2% - ensures stable rail for 3.0V logic or analog circuitry without external feedback |
| Quiescent Current | 1.0µA typical - enables >1-year battery life in always-on sensor nodes powered by coin cells |
| Dropout Voltage | 25mV typical at 10mA - allows operation down to VIN = 3.025V while sustaining 3.0V output |
| Output Current | 250mA maximum - supports moderate-current peripherals like Bluetooth LE modules or display drivers |
| Line Regulation | 6mV typical - limits output variation to <0.2% over full 2.5V–6.0V input range |
| Load Regulation | 25mV typical (1–100mA) - holds output within ±0.83% across dynamic load steps |
| Temp Coefficient | ±100ppm/°C - contributes ≤±0.025% output shift over –40°C to +85°C junction range |
Pinout & Package
SOT-23-3 package: small-outline transistor outline with gull-wing leads, 1.3mm × 2.9mm footprint, 1.45mm height, and 250°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Primary return path for internal bias and output current; requires low-impedance PCB connection to minimize noise and dropout error |
| 2 (VOUT) | Regulated output | Delivers stable 3.0V to load; must be decoupled with ≥1µF ceramic capacitor placed adjacent to pin |
| 3 (VIN) | Input supply | Accepts 2.5–6.0V unregulated source; requires ≥1µF ceramic input capacitor close to pin to suppress ripple and ensure stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typical - reduces battery drain to negligible levels during system sleep modes |
| High output accuracy | ±2% over temperature and line/load - eliminates need for post-regulation trimming in cost-sensitive designs |
| Low dropout performance | 25mV at 10mA - extends usable battery voltage range by >100mV compared to standard LDOs |
| Ceramic capacitor compatible | Stable with 1µF output cap (ESR 0.01–100Ω) - enables use of compact, high-reliability MLCCs instead of bulkier tantalum |
| Thermal shutdown protection | Integrated junction temperature cutoff - prevents damage during sustained overload or poor PCB heatsinking |
Applications
| Wearable Health Monitor | Wireless Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG signal acquisition powered by CR2032 coin cell with multi-year target battery life. IC Role / Device Role / Timing Role: Primary 3.0V supply for ultra-low-power MCU and analog front-end ADC. Use Value: 1.0µA quiescent current minimizes standby drain; ±2% output accuracy ensures consistent ADC reference scaling across temperature. |
Use Scenario: Battery-operated environmental sensor (temp/humidity/pressure) transmitting data via sub-GHz RF every 5 minutes. IC Role / Device Role / Timing Role: Regulated 3.0V rail for RF transceiver and microcontroller during active transmit bursts. Use Value: 250mA output headroom supports 150mA RF peak current; 25mV dropout preserves battery runtime down to 3.025V input. |
| Portable Barcode Scanner | Smart Remote Control |
|
Use Scenario: Handheld scanner using laser diode and CMOS imager, powered by two AAA alkaline cells. IC Role / Device Role / Timing Role: Stable 3.0V supply for image sensor and decoding ASIC during brief scan activation. Use Value: Low 25mV dropout enables full operation until battery drops to ~3.05V; ±100ppm/°C tempco maintains imaging accuracy across operating environment. |
Use Scenario: IR/Bluetooth remote with motion sensing and OLED display, running on single AA cell. IC Role / Device Role / Timing Role: Main 3.0V regulator for display driver, MCU, and BLE radio during button press or gesture wake-up. Use Value: Ceramic-capacitor compatibility simplifies layout in tight enclosure; 6mV line regulation prevents display flicker during battery voltage sag. |
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 device: 1.2µA IQ, 200mA output, same SOT-23-3 package, AEC-Q200 qualified | Designed for automotive-grade reliability; supports PPAP and IATF 16949 traceability | Select when new designs require extended lifecycle support or automotive qualification |
| MCP1700T-3002E/TT | Microchip part: 1.6µA IQ, 250mA, ±0.4% initial accuracy, 175mV dropout at 250mA | Higher accuracy but higher dropout; requires 2.2µF min output capacitance | Prefer where tighter initial tolerance outweighs dropout penalty and ceramic cap flexibility |
Compared with AP2138R-3.0TRG1, AP7354-30SAG-7 offers enhanced automotive compliance and longer product longevity, while MCP1700T-3002E/TT trades lower dropout for superior initial accuracy - making AP2138R-3.0TRG1 optimal for legacy portable designs prioritizing ultra-low IQ and minimal BOM cost.
Availability
AP2138R-3.0TRG1 is available at Aetrix Electronics and suitable for wearable health monitors, wireless sensor nodes, portable barcode scanners, and smart remote controls requiring stable component supply with proven field reliability.
Supply support for AP2138R-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 ICs, specializing in high-performance, energy-efficient components for consumer, industrial, and automotive markets.
The AP2138 series belongs to Diodes' ultra-low-IQ LDO portfolio, engineered specifically for battery-critical portable electronics where multi-year standby life and minimal board space are design priorities.
FAQ
What is the minimum input voltage required for AP2138R-3.0TRG1 to maintain regulation at 3.0V output?
The minimum input voltage depends on load current and temperature. At 10mA output and +25°C, dropout is 25mV typical, so VIN ≥ 3.025V sustains regulation. At 100mA, typical dropout rises to 200mV, requiring VIN ≥ 3.2V. The absolute minimum specified VIN is 2.5V, but regulation is not guaranteed below VOUT + VDROP across all conditions.
Can AP2138R-3.0TRG1 be used with aluminum polymer or tantalum output capacitors?
No - the device is optimized for ceramic capacitors with ESR between 0.01Ω and 100Ω. Aluminum polymer and tantalum capacitors typically have ESR outside this range and may cause instability or oscillation. Diodes' datasheet explicitly recommends ceramic capacitors and specifies minimum 1µF value for stability.
Is AP2138R-3.0TRG1 pin-compatible with other variants in the AP2138 family?
Yes - all AP2138 variants (e.g., AP2138R-1.8TRG1, AP2138R-3.3TRG1) share identical SOT-23-3 pinout (GND, VOUT, VIN). Output voltage is set internally; no external resistors are needed. Swapping variants requires only PCB-level voltage verification and load compatibility checks.
Does AP2138R-3.0TRG1 include reverse polarity or overvoltage protection?
No - the device lacks integrated reverse-polarity protection and is not rated for input overvoltage beyond its absolute maximum rating of 6.6V. External protection (e.g., series Schottky diode for reverse polarity, TVS for transients) must be added if those conditions exist in the application.
AP2138R-3.0TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
AP2138R-3.0TRG1 FAQ
1.How can I place an order for AP2138R-3.0TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2138R-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 AP2138R-3.0TRG1 reliable?
The price and inventory of AP2138R-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 AP2138R-3.0TRG1 is usually 5 days.
3.What payment methods are accepted for AP2138R-3.0TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2138R-3.0TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2138R-3.0TRG1?
AP2138R-3.0TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2138R-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 AP2138R-3.0TRG1?
For technical support, including AP2138R-3.0TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2138R-3.0TRG1 requirements.
6.How does Aetrix verify that AP2138R-3.0TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2138R-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 AP2138R-3.0TRG1 meets industry standards.
7.What is the process for return or replacement of AP2138R-3.0TRG1?
All AP2138R-3.0TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2138R-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 AP2138R-3.0TRG1 part is unused and in its original packaging.
Return procedure for AP2138R-3.0TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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