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Diodes Incorporated AP2139AK-3.0TRG1
- Part No.:
- AP2139AK-3.0TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2139AK-3.0TRG1.pdf
- Description:
- IC REG LINEAR 3V 250MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:13,173
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Product details
Overview
AP2139AK-3.0TRG1 from Diodes Incorporated is a fixed-output 3.0V CMOS low-dropout (LDO) regulator in SOT-23-5 package, featuring ultra-low 1.0µA quiescent current, ±2% output voltage accuracy, and active high enable with quick discharge. It delivers up to 250mA output current with 25mV dropout at 10mA load and supports portable battery-powered systems requiring stable low-power biasing.
For engineers reviewing the AP2139AK-3.0TRG1 datasheet, AP2139AK-3.0TRG1 pinout, AP2139AK-3.0TRG1 application, or AP2139AK-3.0TRG1 equivalent, key selection criteria include standby current (0.1µA), enable logic thresholds (VIH = 1.2V, VIL = 0.3V), dropout behavior at 100mA (200mV typ), thermal resistance (81.9°C/W), and compatibility with 1µF ceramic output capacitors.
Technical Context
This LDO integrates a precision voltage reference, error amplifier, resistor feedback network, and current-limit protection. Its enable circuit provides logic-controlled shutdown with active quick discharge-fully discharging the output capacitor when disabled.
The device operates across -40°C to +85°C ambient temperature with input voltage range 2.5V–6.0V and maintains ±100ppm/°C output voltage temperature coefficient. Dropout voltage scales linearly with load: 25mV at 10mA, 200mV at 100mA, and 450mV at 250mA for the 3.0V version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±2% - ensures stable core/bias rail for microcontrollers and sensors without external feedback. |
| Quiescent Current | 1.0µA typical - enables multi-year battery life in always-on IoT endpoints and wearables. |
| Standby Current | 0.1µA typical - minimizes leakage during system sleep mode when CE = low. |
| Max Output Current | 250mA - supports moderate-power peripherals like BLE radios or display drivers. |
| Dropout Voltage | 25mV @ 10mA / 200mV @ 100mA - allows operation from single-cell Li-ion (3.0–4.2V) or two-cell alkaline with margin. |
| Line Regulation | 6mV typical - limits output variation under input supply ripple or battery sag. |
| Load Regulation | 25mV typical (1–100mA) - maintains voltage stability across dynamic load steps in portable AV systems. |
| Thermal Resistance θJA | 250°C/W - defines power dissipation limit: max ~400mW at TA = 85°C before derating. |
Pinout & Package
SOT-23-5 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CE | Active-high enable input; drives internal pass transistor and activates quick-discharge FET when low. |
| 2 | NC | No connection - electrically isolated, must be left floating or grounded per layout guidelines. |
| 3 | VIN | Main input supply (2.5–6.0V); requires ≥1µF ceramic decoupling close to pin. |
| 4 | VOUT | Regulated 3.0V output; requires ≥1µF ceramic capacitor (ESR 0.01–100Ω) for stability. |
| 5 | GND | Power ground reference; must connect to low-impedance PCB ground plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typical - extends battery runtime in maintenance-free sensor nodes and remote controls. |
| Quick output discharge | Active discharge path via internal FET when CE = low - prevents residual voltage hold-up that could delay system reset. |
| Logic-compatible enable | VIH = 1.2V min, VIL = 0.3V max - interfaces directly with 1.8V/3.3V GPIOs without level-shifting. |
| High output accuracy | ±2% over temperature and line/load - eliminates need for post-regulation trimming in precision analog subsystems. |
| Low temperature drift | ±100ppm/°C - ensures <±15mV output shift from -40°C to +85°C for 3.0V output. |
| Stable with ceramic caps | Supports 1µF X7R/X5R ceramics (0.01–100Ω ESR) - reduces BOM count and board area vs. tantalum alternatives. |
Applications
| Wireless Sensor Nodes | Portable Medical Devices |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via BLE every 5 seconds. IC Role / Device Role / Timing Role: Primary 3.0V bias rail for MCU, radio transceiver, and analog front-end. Use Value: 1.0µA quiescent current enables >5-year CR2032 battery life; quick discharge ensures clean power-down between transmissions. |
Use Scenario: Handheld pulse oximeter with OLED display and optical sensor array. IC Role / Device Role / Timing Role: Stable 3.0V supply for analog signal chain and display driver IC. Use Value: ±2% output accuracy maintains ADC reference integrity; low dropout preserves operation down to 3.1V battery voltage. |
| Smart Wearables | Industrial Handheld Terminals |
|
Use Scenario: Fitness tracker with accelerometer, heart-rate monitor, and vibration motor. IC Role / Device Role / Timing Role: Always-on 3.0V rail for real-time clock and sensor hub during sleep mode. Use Value: 0.1µA standby current minimizes leakage during deep-sleep cycles; CE pin enables synchronized wake-up sequencing. |
Use Scenario: Ruggedized barcode scanner with flash LED and laser diode driver. IC Role / Device Role / Timing Role: Secondary regulated rail for logic and interface ICs, isolated from noisy motor/LED supplies. Use Value: 6mV line regulation rejects ripple from shared DC-DC converter; thermal resistance supports 50°C ambient operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7354-30SAG-7 | Successor device: 3.0V, 300mA, 500nA IQ, SOT-23-5, AEC-Q100 qualified. | Automotive-grade qualification and lower IQ support extended-temperature industrial designs. | Select for new designs requiring longer lifecycle support and automotive compliance. |
| MCP1700-3002E/TO | 3.0V, 250mA, 1.6µA IQ, TO-92 package - higher quiescent current, through-hole mounting. | Limited to low-density PCBs where SMT assembly is unavailable or thermal mass is prioritized. | Choose only if legacy through-hole assembly or higher thermal inertia is required. |
Compared with AP2139AK-3.0TRG1, AP7354-30SAG-7 offers superior IQ and automotive qualification but requires validation of enable timing; MCP1700-3002E/TO trades SMT scalability and ultra-low IQ for mechanical robustness and simpler rework.
Availability
AP2139AK-3.0TRG1 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical devices, smart wearables, and industrial handheld terminals requiring stable component supply with traceable sourcing and long-term continuity.
Supply support for AP2139AK-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 AP2138/2139 series belongs to Diodes' ultra-low-IQ LDO portfolio, designed specifically for battery-constrained portable and IoT applications demanding minimal standby power and fast enable/disable response.
FAQ
What is the minimum input voltage required for AP2139AK-3.0TRG1 to regulate 3.0V output?
The recommended minimum input voltage is 2.5V per datasheet operating conditions. At 100mA load, dropout is 200mV typical, so VIN ≥ 3.2V ensures full regulation margin. Below 2.5V, the device enters dropout and output tracks input minus RDS(on) × IOUT.
Can AP2139AK-3.0TRG1 be used without an output capacitor?
No. A minimum 1µF ceramic capacitor with ESR between 0.01Ω and 100Ω is required at VOUT for stability. Omitting it causes oscillation or excessive output ripple, as confirmed by the functional block diagram and typical application circuit in DS37428 Rev. 6-3.
Is the NC pin on AP2139AK-3.0TRG1 internally connected or should it be grounded?
Pin 2 is explicitly designated "NC" (No Connection) in the Pin Description table. It is electrically isolated and must remain unconnected-neither grounded nor tied to any voltage. Routing traces to it may induce parasitic coupling or violate isolation guarantees.
Does AP2139AK-3.0TRG1 support reverse current blocking during shutdown?
Yes. When CE = low, the quick-discharge function actively pulls VOUT to GND through an internal FET, and the pass transistor is fully off-preventing reverse current flow from VOUT back into VIN, as verified by the functional block diagram and standby current specification (ISTD = 0.1µA).
AP2139AK-3.0TRG1 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):
- 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:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AP2139AK-3.0TRG1 FAQ
1.How can I place an order for AP2139AK-3.0TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2139AK-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 AP2139AK-3.0TRG1 reliable?
The price and inventory of AP2139AK-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 AP2139AK-3.0TRG1 is usually 5 days.
3.What payment methods are accepted for AP2139AK-3.0TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2139AK-3.0TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2139AK-3.0TRG1?
AP2139AK-3.0TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2139AK-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 AP2139AK-3.0TRG1?
For technical support, including AP2139AK-3.0TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2139AK-3.0TRG1 requirements.
6.How does Aetrix verify that AP2139AK-3.0TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2139AK-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 AP2139AK-3.0TRG1 meets industry standards.
7.What is the process for return or replacement of AP2139AK-3.0TRG1?
All AP2139AK-3.0TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2139AK-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 AP2139AK-3.0TRG1 part is unused and in its original packaging.
Return procedure for AP2139AK-3.0TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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