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Diodes Incorporated AP2122AK-3.0TRE1
- Part No.:
- AP2122AK-3.0TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2122AK-3.0TRE1.pdf
- Description:
- IC REG LINEAR 3V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,113
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Product details
Overview
AP2122AK-3.0TRE1 from Diodes Incorporated is a fixed-output 3.0V, high-speed, ultra-low-noise CMOS LDO regulator in SOT-23-5 package, delivering ≥150mA output current with 150mV typical dropout at 100mA, 30µVrms output noise (10Hz–100kHz), and ±2% output voltage accuracy. It integrates active-high enable with internal pull-down resistor and supports ceramic output capacitors as low as 1µF.
For engineers reviewing the AP2122AK-3.0TRE1 datasheet, AP2122AK-3.0TRE1 pinout, AP2122AK-3.0TRE1 application, or AP2122AK-3.0TRE1 equivalent, key selection criteria include dropout performance under 100mA load, PSRR >70dB at 10kHz, standby current ≤0.1µA, thermal resistance (θJA = 250°C/W), and compatibility with low-ESR ceramic capacitors in space-constrained portable designs.
Technical Context
The AP2122AK-3.0TRE1 employs a CMOS-based error amplifier with precision voltage reference and resistor network to maintain stable 3.0V output across input voltages from 3.5V to 6V. Its architecture enables fast line and load transient response without external compensation.
It features integrated current limiting (50mA short-circuit limit), thermal shutdown, and an active-high CE pin with 1.5V logic-high threshold and 0.25V logic-low threshold. The internal 5MΩ pull-down resistor ensures default disable state when CE is floating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±2% - Ensures stable core or I/O rail for 3.0V logic interfaces and sensors |
| Dropout Voltage | 150mV typ. @ 100mA - Enables operation from 3.15V input, critical for single-cell Li-ion or Li-poly systems |
| RMS Output Noise | 30µVrms (10Hz–100kHz) - Meets low-noise requirements for RF front-ends and precision ADC/DAC supplies |
| PSRR | 70dB typ. @ 10kHz - Suppresses switching noise from upstream DC/DC converters feeding the LDO input |
| Quiescent Current | 25µA typ. - Minimizes battery drain in always-on subsystems such as real-time clocks or wake-up circuitry |
| Standby Current | 0.1µA typ. - Allows deep-sleep power management in battery-powered devices with CE-controlled shutdown |
| Max Output Current | 150mA continuous (300mA current-limited) - Supports moderate-power peripherals like Bluetooth modules or small displays |
| Input Voltage Range | 3.5V to 6V - Compatible with regulated 5V rails or boosted 3.3V sources |
Pinout & Package
SOT-23-5 package: 2.9mm × 1.6mm × 1.1mm body, 0.95mm lead pitch, thermally enhanced pad design per Diodes' recommended layout (E2=1.90mm, E1=0.95mm, G=1.60mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VOUT | Regulated output | Delivers clean 3.0V supply; requires ≥1µF ceramic capacitor for stability |
| 2 GND | Ground reference | Low-impedance return path; must be connected directly to PCB ground plane |
| 3 VIN | Input voltage | Accepts 3.5–6V input; requires 1µF ceramic decoupling capacitor close to pin |
| 4 CE | Enable control | Active-high logic input; internal 5MΩ pull-down ensures default OFF state |
| 5 NC | No connection | Unbonded die pad; must remain unconnected and unshorted on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 30µVrms output noise enables use in analog signal chains without additional filtering |
| High PSRR at mid-band frequencies | 70dB rejection at 10kHz suppresses ripple from common 1–2MHz DC/DC converters |
| Low dropout with high current capability | 150mV dropout at 100mA allows efficient operation from marginal input rails |
| Integrated enable with pull-down | Eliminates need for external pull-down resistor, reducing BOM count and board area |
| Ceramic capacitor compatibility | Stable with 1µF ceramic output cap (ESR 0.01–100Ω), enabling compact, low-profile designs |
| Precision output accuracy | ±2% tolerance over -40°C to +85°C ensures reliable operation across industrial temperature range |
Applications
| Mobile Audio Subsystem | IoT Sensor Node Power |
|---|---|
Use Scenario: Powering MEMS microphones and audio codecs in smartphones and wireless earbuds. IC Role / Device Role / Timing Role: Low-noise 3.0V bias supply for analog front-end circuitry. Use Value: 30µVrms noise prevents audible hiss; 70dB PSRR blocks switcher-induced interference. |
Use Scenario: Supplying 3.0V to ultra-low-power environmental sensors (temperature, humidity, gas) in battery-operated edge nodes. IC Role / Device Role / Timing Role: Primary regulated rail enabling <1µA sleep current via CE-controlled shutdown. Use Value: 0.1µA standby current extends 10-year battery life; ±2% accuracy maintains sensor calibration integrity. |
| Wearable Display Backlight Driver | Industrial Control Sub-board |
Use Scenario: Providing stable 3.0V supply to OLED display driver ICs in smartwatches and fitness trackers. IC Role / Device Role / Timing Role: Local LDO for display power domain, decoupled from noisy system rails. Use Value: Fast load transient response (<200µs settling) prevents visible flicker during screen updates. |
Use Scenario: Generating 3.0V for isolated communication interfaces (I²C, SPI) on telecom sub-boards. IC Role / Device Role / Timing Role: Secondary regulated rail for interface logic, tolerant of 3.5–6V input variation. Use Value: 150mV dropout allows operation from shared 3.3V or 5V backplane rails; ±2% accuracy ensures protocol timing margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7315-30WG-7 | 3.0V output, 300mA rated, 250mV dropout @ 150mA, 45µVrms noise, SOT-23-5 | Higher current capability but higher noise and dropout; no built-in CE pull-down | Choose when >150mA load or lower cost is prioritized over noise and ease of enable control |
| MCP1700-3002E/TO | 3.0V output, 250mA rated, 178mV dropout @ 250mA, 30µVrms noise, TO-92 package | Larger through-hole package; no CE pin; higher thermal resistance (θJA = 290°C/W) | Choose only for legacy through-hole assembly or where SOT-23-5 footprint is unavailable |
Compared with AP7315-30WG-7 and MCP1700-3002E/TO, the AP2122AK-3.0TRE1 uniquely combines ultra-low noise, integrated CE pull-down, and optimized SOT-23-5 thermal performance-making it superior for compact, battery-sensitive, noise-critical applications where board space and sleep current are constrained.
Availability
AP2122AK-3.0TRE1 is available at Aetrix Electronics and suitable for mobile audio subsystems, IoT sensor nodes, wearable display power, and industrial control sub-board applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP2122AK-3.0TRE1 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 high-performance power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.
The AP2122 series belongs to Diodes' high-speed, low-noise LDO product line, designed specifically for battery-powered portable electronics where power efficiency, noise immunity, and small-footprint integration are essential.
FAQ
What is the minimum input voltage required for stable 3.0V output at 100mA load?
The AP2122AK-3.0TRE1 requires a minimum input voltage of 3.15V to maintain regulation at 100mA, based on its 150mV typical dropout voltage. Operation below this level risks output droop or dropout; the recommended operating range is 3.5V to 6V per datasheet specifications.
Can the AP2122AK-3.0TRE1 be used without an external pull-down resistor on the CE pin?
Yes-the device integrates a 5MΩ internal pull-down resistor on the CE pin, ensuring reliable shutdown when the pin is left unconnected or driven by an open-drain source. No external resistor is needed unless specific timing or leakage requirements dictate otherwise.
Is a 1µF ceramic capacitor sufficient for output stability across temperature and load conditions?
Yes-Diodes specifies that a 1µF ceramic capacitor with ESR between 0.01Ω and 100Ω ensures stability across -40°C to +85°C and full load range. X5R or X7R dielectrics are recommended; avoid high-ESR types like Y5V or Z5U for consistent performance.
How does the AP2122AK-3.0TRE1 handle short-circuit events?
It limits output current to approximately 50mA during a short-circuit condition, as specified in the Electrical Characteristics table. This foldback current limit protects both the IC and upstream power source while allowing safe recovery once the fault is removed.
AP2122AK-3.0TRE1 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):
- 0.4V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (10kHz)
- 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
AP2122AK-3.0TRE1 FAQ
1.How can I place an order for AP2122AK-3.0TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2122AK-3.0TRE1 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 AP2122AK-3.0TRE1 reliable?
The price and inventory of AP2122AK-3.0TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2122AK-3.0TRE1 is usually 5 days.
3.What payment methods are accepted for AP2122AK-3.0TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2122AK-3.0TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2122AK-3.0TRE1?
AP2122AK-3.0TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2122AK-3.0TRE1 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 AP2122AK-3.0TRE1?
For technical support, including AP2122AK-3.0TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2122AK-3.0TRE1 requirements.
6.How does Aetrix verify that AP2122AK-3.0TRE1 is sourced from the original manufacturer or authorized distributors?
All AP2122AK-3.0TRE1 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 AP2122AK-3.0TRE1 meets industry standards.
7.What is the process for return or replacement of AP2122AK-3.0TRE1?
All AP2122AK-3.0TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2122AK-3.0TRE1, 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 AP2122AK-3.0TRE1 part is unused and in its original packaging.
Return procedure for AP2122AK-3.0TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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