My Inquiry
My Account
Diodes Incorporated AP2139AK-1.8TRG1
- Part No.:
- AP2139AK-1.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2139AK-1.8TRG1.pdf
- Description:
- IC REG LINEAR 1.8V 250MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,650
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP2139AK-1.8TRG1 from Diodes Incorporated is a fixed-output 1.8V, 250mA ultra-low-quiescent-current CMOS LDO regulator in SOT-23-5 package, featuring active high enable (CE), quick output discharge, ±2% output voltage accuracy, and 1.0µA typical quiescent current-designed for battery-powered portable AV systems and mobile phone core logic rails.
For engineers reviewing the AP2139AK-1.8TRG1 datasheet, AP2139AK-1.8TRG1 pinout, AP2139AK-1.8TRG1 application, or AP2139AK-1.8TRG1 equivalent, key selection criteria include dropout voltage at 100mA (400mV typ), standby current (0.1µA typ), CE input logic thresholds (VIH = 1.2V, VIL = 0.3V), and thermal resistance (θJA = 250°C/W).
Technical Context
The AP2139AK-1.8TRG1 integrates a precision voltage reference, error amplifier, resistor network for fixed 1.8V regulation, and current-limit protection. Its CE-controlled shutdown enables system-level power sequencing with active-high logic compatibility and internal pull-down (0.2µA).
Quick discharge functionality actively sinks the output node when disabled, ensuring rapid VOUT decay (<1ms to <0.1V) without external components-critical for multi-rail systems requiring controlled power-down timing and isolation between supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±2% (1.764–1.836V); ensures stable core voltage for 1.8V I/O interfaces and low-power microcontrollers. |
| Quiescent Current | 1.0µA typical at zero load; extends battery life in always-on sensor nodes and standby modes. |
| Dropout Voltage | 25mV typical at 10mA / 1.8V output; supports operation down to VIN = 1.825V, enabling single-cell Li-ion or alkaline use. |
| Standby Current | 0.1µA typical with CE = low; minimizes leakage during deep-sleep states in wearable devices. |
| Load Regulation | 25mV typical (1–100mA); maintains tight voltage control across dynamic load steps in portable audio codecs. |
| Line Regulation | 6mV typical (2.8–6.0V input); rejects input ripple from switching pre-regulators or aging batteries. |
| Output Tempco | ±100ppm/°C; limits drift to ±1.8mV over –40°C to +85°C ambient-suitable for precision analog front-ends. |
Pinout & Package
SOT-23-5 package: 2.9mm × 1.6mm × 1.1mm body, surface-mount, RoHS-compliant, lead-free, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CE | Active-high enable input; VIH ≥ 1.2V enables regulation, VIL ≤ 0.3V disables with quick discharge activation. |
| 2 | NC | No connection; electrically isolated, must be left floating or grounded per layout best practice. |
| 3 | VIN | Main input supply pin; accepts 2.5–6.0V; requires ≥1µF ceramic input capacitor for stability. |
| 4 | VOUT | Regulated 1.8V output; minimum 1µF ceramic output capacitor (ESR 0.01–100Ω) required for loop stability. |
| 5 | GND | Power ground reference; must be low-impedance connection to minimize noise coupling into error amplifier. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typical enables >1-year battery life in coin-cell-powered IoT sensors at 10µA average load. |
| Active quick output discharge | Internal NMOS sink discharges VOUT to <0.1V within 1ms of CE deactivation-eliminates need for external bleed resistor. |
| High output accuracy | ±2% tolerance over temperature and line/load ensures reliable operation of 1.8V FPGA I/O banks and ADC references. |
| Logic-compatible enable | CE input accepts standard 1.8V/3.3V GPIO levels (VIH=1.2V, VIL=0.3V), simplifying host MCU interface without level shifters. |
| Low thermal resistance | θJA = 250°C/W allows 250mA continuous output at TA = +85°C with minimal derating in compact PCB footprints. |
Applications
| Wearable Health Monitors | Smartphone Baseband Power |
|---|---|
Use Scenario: Continuous ECG signal acquisition with Bluetooth LE transmission in wrist-worn devices. IC Role / Device Role / Timing Role: Primary 1.8V LDO for analog front-end and BLE radio core logic. Use Value: 1.0µA IQ extends CR2032 battery life beyond 18 months; quick discharge prevents back-powering during sleep transitions. |
Use Scenario: Powering application processor I/O banks and modem subsystems in dual-SIM smartphones. IC Role / Device Role / Timing Role: Secondary LDO delivering clean 1.8V to high-speed SerDes interfaces and memory controllers. Use Value: ±2% accuracy maintains signal integrity at 100+ Mbps data rates; 25mV dropout enables efficient use of buck-boost intermediate rail. |
| Portable Digital Cameras | Industrial Handheld Scanners |
Use Scenario: Image sensor bias and ISP core voltage in battery-operated 4K video recorders. IC Role / Device Role / Timing Role: Low-noise 1.8V supply for CIS analog pixel array and column ADC reference. Use Value: 6mV line regulation suppresses switching noise from PMIC DC-DC stages; ±100ppm/°C tempco ensures consistent white balance calibration. |
Use Scenario: Barcode scanner engine and secure element power in warehouse logistics terminals. IC Role / Device Role / Timing Role: Isolated 1.8V rail for cryptographic ICs and laser driver control logic. Use Value: CE-controlled sequencing prevents bus contention during cold boot; 0.1µA standby current meets EN 50131 low-power alarm system requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7354-18SAG-7 | Successor device: 1.8V, 300mA, 0.6µA IQ, lower dropout (18mV @10mA), same SOT-23-5 package. | Designed for new designs; supports higher load current and tighter dropout-ideal for next-gen wearables with increased sensor count. | Select when designing new products; AP7354 offers improved efficiency and extended battery runtime but requires validation of CE timing compatibility. |
| MCP1700-1802E/TO | Microchip 1.8V LDO: 250mA, 1.6µA IQ, TO-92 package, no enable or quick discharge. | Lacks CE control and discharge; suited for cost-sensitive, non-sequenced applications like simple remote controls. | Choose only for legacy replacements where board space allows TO-92 and system-level discharge is handled externally. |
Compared with AP7354-18SAG-7, AP2139AK-1.8TRG1 trades 0.4µA higher IQ and 7mV higher dropout for proven field reliability in existing designs; versus MCP1700-1802E/TO, it adds critical enable/discharge functionality at the cost of SMT-only assembly and slightly higher BOM complexity.
Availability
AP2139AK-1.8TRG1 is available at Aetrix Electronics and suitable for battery-powered equipment, portable AV systems, and mobile phone power management requiring stable component supply and long-lifecycle support.
Supply support for AP2139AK-1.8TRG1 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 company specializing in discrete, analog, and mixed-signal solutions, with design and manufacturing operations certified to IATF 16949 and ISO 9001 standards.
The AP2139 series belongs to Diodes' ultra-low-IQ LDO product line, engineered specifically for energy-constrained portable electronics where battery longevity and precise voltage regulation are critical.
FAQ
What is the maximum input voltage rating for AP2139AK-1.8TRG1?
The absolute maximum input voltage is 6.6V, but recommended operating range is 2.5V to 6.0V. Exceeding 6.0V risks exceeding junction temperature limits under load, especially at high ambient temperatures. The device includes internal overvoltage protection that clamps VIN transients above 6.6V, but sustained operation above 6.0V is not guaranteed per datasheet specifications.
Does AP2139AK-1.8TRG1 require an external discharge resistor?
No. The AP2139AK-1.8TRG1 integrates an active NMOS discharge switch on the VOUT pin, activated automatically when CE is driven low. This provides sub-millisecond discharge without external components, reducing BOM count and PCB area-unlike AP2138 variants or basic LDOs lacking this feature.
Can AP2139AK-1.8TRG1 operate with ceramic output capacitors below 1µF?
No. The datasheet specifies a minimum 1µF ceramic output capacitor with ESR between 0.01Ω and 100Ω for loop stability. Using smaller values risks oscillation or poor transient response, particularly during load steps up to 250mA. X5R/X7R dielectrics are recommended for stable capacitance across temperature and bias.
Is AP2139AK-1.8TRG1 qualified for automotive applications?
No. AP2139AK-1.8TRG1 is not AEC-Q100 qualified. Diodes Incorporated offers automotive-grade alternatives (e.g., AP7361x-Q series) with PPAP support, extended temperature range (–40°C to +125°C), and IATF 16949 manufacturing. This part is intended for commercial and industrial portable applications only.
AP2139AK-1.8TRG1 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.1V @ 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-1.8TRG1 FAQ
1.How can I place an order for AP2139AK-1.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2139AK-1.8TRG1 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-1.8TRG1 reliable?
The price and inventory of AP2139AK-1.8TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2139AK-1.8TRG1 is usually 5 days.
3.What payment methods are accepted for AP2139AK-1.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2139AK-1.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2139AK-1.8TRG1?
AP2139AK-1.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2139AK-1.8TRG1 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-1.8TRG1?
For technical support, including AP2139AK-1.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2139AK-1.8TRG1 requirements.
6.How does Aetrix verify that AP2139AK-1.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2139AK-1.8TRG1 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-1.8TRG1 meets industry standards.
7.What is the process for return or replacement of AP2139AK-1.8TRG1?
All AP2139AK-1.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2139AK-1.8TRG1, 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-1.8TRG1 part is unused and in its original packaging.
Return procedure for AP2139AK-1.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP2139AK-1.8TRG1 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
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
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.…
