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Diodes Incorporated AP2139AK-1.5TRG1
- Part No.:
- AP2139AK-1.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2139AK-1.5TRG1.pdf
- Description:
- IC REG LINEAR 1.5V 250MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,780
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Product details
Overview
AP2139AK-1.5TRG1 from Diodes Incorporated is a fixed-output 1.5V CMOS low-dropout (LDO) regulator in SOT-23-5 package, featuring ultra-low 1.0µA quiescent current, ±2% output voltage accuracy, and logic-controlled enable with active quick discharge. It delivers up to 250mA output current and supports input voltages from 2.5V to 6.0V, making it suitable for battery-powered portable AV systems requiring stable low-power biasing.
For engineers reviewing the AP2139AK-1.5TRG1 datasheet, AP2139AK-1.5TRG1 pinout, AP2139AK-1.5TRG1 application, or AP2139AK-1.5TRG1 equivalent, key selection criteria include quiescent current under light load, dropout behavior at 100mA, CE input logic thresholds, standby current in shutdown, and thermal resistance in SOT-23-5.
Technical Context
The AP2139AK-1.5TRG1 integrates a precision voltage reference, error amplifier, resistor network for fixed 1.5V output, and current-limit protection. Its enable circuit accepts logic-high (≥1.2V) to activate regulation and provides active pull-down of VOUT during disable via internal discharge path.
Designed for high-accuracy, low-noise power rails, it achieves ±100ppm/°C output temperature coefficient and maintains stability with ≥1µF ceramic output capacitance (ESR 0.01–100Ω). Line regulation is 6mV typical across 2.5–6.0V input range; load regulation is 25mV typical from 1mA to 100mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.500V ±2% - ensures stable bias for 1.5V logic or analog circuitry without external feedback |
| Quiescent Current | 1.0µA typical - enables multi-year battery life in always-on sensor nodes or standby modes |
| Standby Current | 0.1µA typical - minimizes leakage when CE = low, critical for long-term storage or deep-sleep states |
| Dropout Voltage | 100mV typical at 10mA - allows operation with only 1.6V input for 1.5V output, extending usable battery range |
| Output Current | 250mA maximum - supports moderate-power peripherals like small displays or audio codecs |
| CE Input Threshold | VIH = 1.2V min, VIL = 0.3V max - compatible with 1.8V/3.3V GPIO without level-shifting |
| Thermal Resistance | θJA = 250°C/W - defines power dissipation limit (e.g., 300mW max at TA = 85°C) |
Pinout & Package
SOT-23-5 package: compact 2.9mm × 1.6mm surface-mount outline with exposed thermal pad (not electrically connected), rated for 150°C junction temperature and +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CE | Active-high enable input; drives internal pass transistor gate and activates quick-discharge FET when low |
| 2 | NC | No connection - must be left floating or grounded per layout guidelines; no internal bond |
| 3 | VIN | Main input supply (2.5–6.0V); requires ≥1µF ceramic decoupling capacitor adjacent to pin |
| 4 | VOUT | Regulated 1.5V output; requires ≥1µF ceramic capacitor with ESR 0.01–100Ω for stability |
| 5 | GND | Analog and power ground reference; connects to PCB ground plane for thermal and noise performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typical enables >10-year battery life in 10µA average-load IoT sensors |
| Active quick output discharge | Internal FET discharges VOUT within microseconds upon CE deactivation, preventing hold-up voltage in sequencing-critical systems |
| Logic-compatible enable input | CE threshold (1.2V/0.3V) interfaces directly with 1.8V or 3.3V microcontrollers without external circuitry |
| ±2% output voltage accuracy | Guarantees 1.47–1.53V over temperature and line/load, eliminating need for post-regulation trimming in precision analog rails |
| Low temperature coefficient | ±100ppm/°C drift ensures <±15mV variation across –40°C to +85°C, critical for reference-sensitive ADCs |
Applications
| Portable Medical Sensors | Wireless Remote Controls |
|---|---|
Use Scenario: Continuous glucose monitor with BLE radio and low-power MCU operating from coin cell. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying analog front-end and RF transceiver bias rails. Use Value: 1.0µA quiescent current extends battery life beyond 2 years; quick discharge prevents residual voltage from interfering with MCU wake-up timing. |
Use Scenario: Infrared remote with motion-activated wake and sub-100nA sleep current. IC Role / Device Role / Timing Role: Enables regulated 1.5V rail only during button press or motion detection event. Use Value: 0.1µA standby current meets ultra-low-power requirements; CE logic compatibility simplifies direct GPIO control without level shifters. |
| Industrial Data Loggers | Smart Wearable Displays |
Use Scenario: Temperature/humidity logger sampling every 5 minutes using energy harvesting. IC Role / Device Role / Timing Role: Provides stable 1.5V reference for precision ADC and low-noise sensor interface. Use Value: ±2% output accuracy and ±100ppm/°C drift ensure measurement repeatability across environmental conditions without calibration. |
Use Scenario: OLED display module in fitness tracker powered by rechargeable Li-ion cell. IC Role / Device Role / Timing Role: Supplies 1.5V bias to display driver IC during active screen updates. Use Value: 100mV dropout at 10mA allows operation down to 1.6V input, maximizing usable battery voltage range before shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7354-15SAG-7 | Successor device: 1.5V fixed, 300mA output, 0.6µA IQ, same SOT-23-5 package | Higher current capability and lower quiescent current; qualified for new designs per Diodes' notice | Select for new designs requiring extended lifetime or higher load margin; pinout and footprint compatible |
| MCP1700T-1502E/TT | Microchip 1.5V LDO: 250mA, 1.6µA IQ, SOT-23-3, no enable pin | Lacks CE and quick discharge; smaller package but no logic control or discharge function | Choose where enable functionality is unnecessary and board space is constrained; requires redesign for CE integration |
Compared with AP2139AK-1.5TRG1, AP7354-15SAG-7 offers lower quiescent current and higher current rating in identical packaging, while MCP1700T-1502E/TT trades enable/discharge capability for minimal footprint-making AP2139AK-1.5TRG1 optimal when controlled shutdown and fast rail collapse are required.
Availability
AP2139AK-1.5TRG1 is available at Aetrix Electronics and suitable for portable medical sensors, wireless remote controls, industrial data loggers, and smart wearable displays requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for AP2139AK-1.5TRG1 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 power management, signal integrity, and connectivity solutions for industrial, consumer, and automotive markets.
The AP2139 series belongs to Diodes' ultra-low-IQ LDO product line, designed specifically for battery-constrained portable electronics where extended runtime and precise voltage regulation are essential.
FAQ
What is the minimum input voltage required for AP2139AK-1.5TRG1 to regulate 1.5V output?
The recommended minimum input voltage is 2.5V per the datasheet's operating conditions. At 10mA load, dropout is typically 100mV, so 1.6V input would theoretically sustain regulation-but 2.5V ensures full specification compliance across temperature, line, and load variations including worst-case ±2% output tolerance and 25mV load regulation.
Does AP2139AK-1.5TRG1 require an external capacitor on the CE pin?
No external capacitor is required on the CE pin. The CE input is a standard CMOS logic interface with VIH ≥1.2V and VIL ≤0.3V; it draws only 0.2µA pull-down current. Layout best practice is to minimize trace length and avoid noisy routing, but no filtering capacitor is specified or needed for functional operation.
Can AP2139AK-1.5TRG1 be used with ceramic output capacitors below 1µF?
No. The datasheet mandates ≥1µF ceramic output capacitance with ESR between 0.01Ω and 100Ω for stability. Using smaller values risks oscillation or poor transient response, as confirmed by the typical application circuit and stability characterization across load steps. X7R or X5R dielectrics are recommended.
Is AP2139AK-1.5TRG1 qualified for automotive applications?
AP2139AK-1.5TRG1 is not AEC-Q100 qualified. Diodes states that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing-none of which apply to this part. For automotive use, contact Diodes directly to explore qualified alternatives such as the AP7361Q series.
AP2139AK-1.5TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 1.5 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AP2139AK-1.5TRG1 FAQ
1.How can I place an order for AP2139AK-1.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2139AK-1.5TRG1 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 AP2139AK-1.5TRG1 reliable?
The price and inventory of AP2139AK-1.5TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2139AK-1.5TRG1 is usually 5 days.
3.What payment methods are accepted for AP2139AK-1.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2139AK-1.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2139AK-1.5TRG1?
AP2139AK-1.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2139AK-1.5TRG1 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 AP2139AK-1.5TRG1?
For technical support, including AP2139AK-1.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2139AK-1.5TRG1 requirements.
6.How does Aetrix verify that AP2139AK-1.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2139AK-1.5TRG1 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 AP2139AK-1.5TRG1 meets industry standards.
7.What is the process for return or replacement of AP2139AK-1.5TRG1?
All AP2139AK-1.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2139AK-1.5TRG1, 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 AP2139AK-1.5TRG1 part is unused and in its original packaging.
Return procedure for AP2139AK-1.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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