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Diodes Incorporated AP2139AK-1.4TRG1
- Part No.:
- AP2139AK-1.4TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2139AK-1.4TRG1.pdf
- Description:
- IC REG LINEAR 1.4V 250MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,914
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Product details
Overview
AP2139AK-1.4TRG1 from Diodes Incorporated is a fixed-output 1.4V CMOS low-dropout (LDO) regulator in SOT-23-5 package, featuring ultra-low 1.0µA quiescent current, ±2% output voltage accuracy, and active enable with 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 and mobile phone core logic rails.
For engineers reviewing the AP2139AK-1.4TRG1 datasheet, AP2139AK-1.4TRG1 pinout, AP2139AK-1.4TRG1 application, or AP2139AK-1.4TRG1 equivalent, key selection criteria include standby current (0.1µA), dropout voltage at 100mA (600mV typ), CE input logic thresholds (VIH = 1.2V, VIL = 0.3V), and thermal resistance (θJA = 250°C/W).
Technical Context
The AP2139AK-1.4TRG1 integrates a precision voltage reference, error amplifier, resistor network for fixed 1.4V output, and current-limit protection. Its enable circuit provides logic-controlled shutdown with active quick discharge of the output capacitor upon disable.
Designed for stable operation with ≥1µF ceramic output capacitance (ESR 0.01–100Ω), it maintains ±100ppm/°C temperature coefficient and achieves 6mV typical line regulation over 2.4–6.0V input range and 25mV load regulation across 1–100mA output current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.400V ±2% - ensures stable core supply for low-voltage microcontrollers and sensors |
| Quiescent Current | 1.0µA typical - enables multi-year battery life in always-on IoT sensor nodes |
| Standby Current | 0.1µA typical - minimizes leakage during system sleep mode with CE = low |
| Dropout Voltage | 600mV typical at 100mA - allows operation from single-cell Li-ion (3.0V min) down to 2.0V under load |
| Output Current | 250mA maximum - supports moderate-power peripherals like camera modules and audio codecs |
| Line Regulation | 6mV typical - maintains tight output stability despite battery voltage sag during discharge |
| Load Regulation | 25mV typical (1–100mA) - prevents output droop during dynamic load transients in portable devices |
| Temp Coefficient | ±100ppm/°C - limits output drift to ±1.4mV over –40°C to +85°C ambient range |
Pinout & Package
SOT-23-5 package with exposed pad (thermal enhancement), 1.3mm × 2.9mm footprint, 1.45mm height, and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CE | Active-high enable input: logic high ≥1.2V enables regulator; low ≤0.3V disables with fast output discharge |
| 2 | NC | No connection - must be left floating or grounded per layout guidelines; no internal function |
| 3 | VIN | Main input supply pin: accepts 2.5–6.0V; requires ≥1µF ceramic decoupling capacitor |
| 4 | VOUT | Regulated 1.4V output: stable only with ≥1µF ceramic capacitor (ESR 0.01–100Ω) |
| 5 | GND | Power ground reference: connects to PCB ground plane; critical for noise immunity and thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typical - extends battery runtime in energy-constrained wearables and remote sensors |
| Logic-controlled enable with quick discharge | CE pin drives internal FET to rapidly discharge VOUT on shutdown - prevents back-powering downstream circuits |
| High output accuracy | ±2% over temperature and line/load - eliminates need for external trimming in precision analog subsystems |
| Low thermal resistance | θJA = 250°C/W - enables 250mA operation without heatsink in compact SOT-23-5 footprint |
| Stable with ceramic capacitors | Supports 1µF output cap (0.01–100Ω ESR) - reduces BOM cost and board area vs. tantalum alternatives |
Applications
| Portable AV Systems | Mobile Phone Baseband |
|---|---|
|
Use Scenario: Powering audio codec and display driver ICs in Bluetooth speakers and portable media players. IC Role / Device Role / Timing Role: Primary 1.4V LDO supplying bias voltage to analog front-end and digital I/O interfaces. Use Value: 1.0µA quiescent current preserves battery charge during standby; ±2% accuracy ensures consistent audio DAC reference. |
Use Scenario: Regulating power for baseband processor I/O banks and RF transceiver control logic. IC Role / Device Role / Timing Role: Secondary LDO delivering clean 1.4V rail isolated from noisy main PMIC outputs. Use Value: Quick-discharge CE function prevents latch-up during power sequencing; 6mV line regulation rejects battery ripple. |
| Wireless Sensor Nodes | Camera Module Power |
|
Use Scenario: Supplying ultra-low-power microcontrollers and environmental sensors in industrial IoT endpoints. IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and wake-up circuitry during deep-sleep cycles. Use Value: 0.1µA standby current enables >10-year battery life; ±100ppm/°C tempco ensures sensor calibration integrity. |
Use Scenario: Providing regulated 1.4V to image sensor analog blocks and autofocus motor drivers. IC Role / Device Role / Timing Role: Dedicated LDO isolating sensitive analog pixel array from digital switching noise. Use Value: 25mV load regulation prevents image artifacts during auto-exposure transients; ceramic-cap compatibility simplifies layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7354-14SAG-7 | Successor device: 1.4V output, 300mA rating, 0.6µA IQ, lower dropout (300mV @100mA) | Designed for new designs; supports higher load current and tighter thermal envelope | Select for new projects requiring extended lifetime support and improved efficiency |
| MCP1700T-1402E/TT | Microchip part: 1.4V, 250mA, 1.6µA IQ, no enable pin, SOT-23-3 package | Lacks CE and quick-discharge; simpler interface but no power sequencing control | Choose when enable functionality is unnecessary and board space is constrained |
Compared with AP2139AK-1.4TRG1, AP7354-14SAG-7 offers lower quiescent current and better dropout for next-gen designs, while MCP1700T-1402E/TT trades enable control for smaller footprint and broader qualification history in legacy consumer systems.
Availability
AP2139AK-1.4TRG1 is available at Aetrix Electronics and suitable for portable AV systems, wireless sensor nodes, mobile phone baseband power, and camera module applications requiring stable component supply and long-term manufacturability planning.
Supply support for AP2139AK-1.4TRG1 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 industrial, computing, and consumer markets.
The AP2138/2139 series belongs to Diodes' ultra-low-IQ LDO product line, engineered specifically for battery-powered portable electronics where extended operating life and precise voltage regulation are critical.
FAQ
What is the minimum input voltage required for AP2139AK-1.4TRG1 to regulate 1.4V output?
The recommended minimum input voltage is 2.5V per datasheet Section 5 (Recommended Operating Conditions). At 100mA load, dropout is 600mV typical, so VIN must exceed 2.0V to sustain regulation - however, 2.5V ensures full specification compliance across temperature and process variation.
Can AP2139AK-1.4TRG1 operate without an output capacitor?
No. The datasheet mandates ≥1µF ceramic output capacitance with ESR between 0.01Ω and 100Ω for stability. Omitting it causes oscillation and potential damage. The quick-discharge function also relies on controlled capacitor discharge through the internal FET.
Is AP2139AK-1.4TRG1 qualified for automotive applications?
No. While Diodes offers AEC-Q100-qualified LDOs (e.g., AP7361 series), AP2139AK-1.4TRG1 is specified for commercial temperature range (–40°C to +85°C) and lacks PPAP documentation or IATF 16949 manufacturing certification per Note on page 1 of DS37428 Rev. 6-3.
How does the CE pin behavior differ from standard enable inputs?
Unlike basic enable pins, CE on AP2139AK-1.4TRG1 activates an internal discharge FET when pulled low, actively pulling VOUT to GND within microseconds. This prevents back-powering of upstream sources or unintended wake-up of downstream ICs during power-down sequences.
AP2139AK-1.4TRG1 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):
- 1.4V
- 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-1.4TRG1 FAQ
1.How can I place an order for AP2139AK-1.4TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2139AK-1.4TRG1 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-1.4TRG1 reliable?
The price and inventory of AP2139AK-1.4TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2139AK-1.4TRG1 is usually 5 days.
3.What payment methods are accepted for AP2139AK-1.4TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2139AK-1.4TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2139AK-1.4TRG1?
AP2139AK-1.4TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2139AK-1.4TRG1 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-1.4TRG1?
For technical support, including AP2139AK-1.4TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2139AK-1.4TRG1 requirements.
6.How does Aetrix verify that AP2139AK-1.4TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2139AK-1.4TRG1 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-1.4TRG1 meets industry standards.
7.What is the process for return or replacement of AP2139AK-1.4TRG1?
All AP2139AK-1.4TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2139AK-1.4TRG1, 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-1.4TRG1 part is unused and in its original packaging.
Return procedure for AP2139AK-1.4TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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