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Skyworks Solutions Inc. AAT3221IJS-2.5-T1
- Part No.:
- AAT3221IJS-2.5-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
AAT3221IJS-2.5-T1.pdf
- Description:
- IC REG LINEAR 2.5V 150MA 8SC70JW
- Quantity:
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- Shipping:
Inventory:36,000
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Product details
Overview
AAT3221IJS-2.5-T1 from Skyworks Solutions is a 150 mA, 2.5 V fixed-output nanopower LDO linear regulator in a Pb-free 5-pin SOT23-5 package, featuring 1.1 µA quiescent current, 210 mV typical dropout at 100 mA, ±2% output voltage accuracy, and active-high enable-designed for battery-powered portable electronics requiring ultra-low standby power.
For engineers reviewing the AAT3221IJS-2.5-T1 datasheet, AAT3221IJS-2.5-T1 pinout, AAT3221IJS-2.5-T1 application, or AAT3221IJS-2.5-T1 equivalent, key selection criteria include guaranteed 150 mA output under 2.5 V regulation, shutdown current <20 nA, thermal/short-circuit protection, and compatibility with 1 µF ceramic output capacitors without stability compensation.
Technical Context
The AAT3221IJS-2.5-T1 implements a CMOS-based LDO architecture with internal P-channel pass transistor, enabling low dropout and near-zero ground current in shutdown. Its enable input is logic-compatible (VEN(H) ≥ 2.4 V at VIN = 5 V; VEN(L) ≤ 0.8 V), and it features integrated over-temperature shutdown at 140 °C with 20 °C hysteresis.
It delivers stable regulation across –40 °C to +85 °C ambient, supports input voltages from (VOUT + VDO) up to 5.5 V, and maintains PSRR ≥ 50 dB at 100 Hz while rejecting line/load transients with minimal output excursion-enabled by optimized internal compensation for low-ESR ceramic capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.5 V ±2% - ensures precise biasing for 2.5 V logic rails and analog circuitry without external feedback. |
| Max output current | 150 mA continuous - sufficient to power baseband processors, sensors, or RF front-end ICs in compact portable devices. |
| Quiescent current | 1.1 µA typical - extends battery life in always-on subsystems such as real-time clocks or wake-up controllers. |
| Dropout voltage | 210 mV typical at 100 mA - allows operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) with margin. |
| Shutdown current | <20 nA - reduces system leakage to negligible levels during deep sleep modes. |
| PSRR | ≥50 dB at 100 Hz - suppresses switching noise from DC-DC converters feeding the LDO input. |
| Thermal shutdown | 140 °C trip with 20 °C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: Pb-free 5-pin SOT23-5 (JEDEC MO-178AA), MSL1, 260 °C reflow compatible. Footprint matches industry-standard SOT-23-5 layout with 0.95 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.7–5.5 V input; supports transient pulses up to 7 V for 8 µs per datasheet Note 2. |
| 2 - GND | Power ground reference | Must be connected directly to low-impedance ground plane; critical for PSRR and transient response. |
| 3 - EN | Active-high enable control | Logic high (≥2.4 V) enables regulation; logic low (≤0.8 V) disables output and reduces IQ to <20 nA. |
| 4 - NC | No-connect terminal | Internally unconnected; must remain floating-no external tie or pull-up/down required. |
| 5 - OUT | Regulated output | Delivers 2.5 V ±2%; requires ≥1 µF ceramic capacitor to GND placed adjacent to pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower quiescent current | 1.1 µA typical - enables multi-year battery life in energy-harvesting or coin-cell applications. |
| Ultra-low shutdown current | <20 nA - eliminates measurable drain during system hibernation, critical for IoT edge nodes. |
| Factory-trimmed output | 2.5 V ±2% over temperature - removes need for external trimming resistors or calibration in production. |
| Capacitor flexibility | Stable with ≥1 µF ceramic (X7R/X5R) - avoids costly tantalum or polymer capacitors and simplifies BOM. |
| Integrated protection | Current limit + thermal shutdown - enables robust operation in unattended embedded systems without external fault management. |
Applications
| Cellular Phone Power Management | Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Supplying 2.5 V to baseband processor I/O banks and PMIC-controlled peripherals during active and standby modes. IC Role / Device Role / Timing Role: Primary low-noise, low-quiescent LDO delivering regulated 2.5 V rail with fast load transient response. Use Value: Enables >100-hour standby time on single Li-ion cell by limiting IQ to 1.1 µA and reducing shutdown leakage to <20 nA. |
Use Scenario: Providing clean 2.5 V bias to CMOS image sensor analog front-end and ADC reference circuits. IC Role / Device Role / Timing Role: Low-noise LDO with 350 µVRMS output noise and ≥50 dB PSRR at 100 Hz. Use Value: Maintains image SNR by suppressing switching noise from adjacent DC-DC converters feeding digital core logic. |
| Notebook Computer Subsystem Rail | Remote Control Microcontroller Core |
|
Use Scenario: Powering always-on microcontroller, RTC, and touchpad controller in laptop lid-open/closed detection circuitry. IC Role / Device Role / Timing Role: Enable-controlled LDO supplying 2.5 V to low-power MCU core and SRAM retention domain. Use Value: Guarantees 150 mA peak current for wake-up events while sustaining <1 µA total system leakage in lid-closed state. |
Use Scenario: Regulating 2.5 V for 8-bit microcontroller and IR LED driver in battery-powered infrared remote controls. IC Role / Device Role / Timing Role: Fixed-output LDO with active-high enable synchronized to button press detection. Use Value: Extends alkaline AA/AAA battery life to >2 years by limiting average current to sub-µA levels between transmissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/MB | 250 mA max output, 1.6 µA IQ, no thermal shutdown, SOT23-5 | Lacks over-temperature protection; higher IQ reduces battery life in long-duration standby | Choose only if higher output current is required and thermal risk is mitigated externally. |
| TCS2115-2.5V | 150 mA max, 1.2 µA IQ, 220 mV dropout at 100 mA, SC70-5 | Smaller SC70-5 footprint but lower thermal mass; derates to ~100 mA at TA = 85 °C | Prefer when board space is constrained and full 150 mA load is not sustained above 60 °C. |
Compared with MCP1700T-2502E/MB and TCS2115-2.5V, the AAT3221IJS-2.5-T1 uniquely combines 1.1 µA IQ, integrated thermal shutdown, and guaranteed 150 mA output in SOT23-5-making it optimal for thermally unmanaged, battery-critical portable designs where reliability and ultra-low leakage are non-negotiable.
Availability
AAT3221IJS-2.5-T1 is available at Aetrix Electronics and suitable for cellular phones, digital cameras, and remote controls requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for AAT3221IJS-2.5-T1 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
Skyworks Solutions is a global leader in analog semiconductors, specializing in RF, mobile, and precision analog solutions for wireless infrastructure, automotive, and portable electronics markets.
The AAT3221IJS-2.5-T1 belongs to Skyworks' NanoPower™ LDO family, engineered specifically for ultra-low-power portable applications where extended battery life, small footprint, and robust protection are essential design requirements.
FAQ
What is the maximum input voltage rating for the AAT3221IJS-2.5-T1?
The AAT3221IJS-2.5-T1 has an absolute maximum input voltage of +7 V for pulses ≤30 ms (10% duty cycle), but its recommended continuous operating input range is 2.7 V to 5.5 V. Exceeding 5.5 V continuously risks exceeding thermal limits or triggering overvoltage stress beyond datasheet specifications. Always maintain VIN ≤ 5.5 V in production designs using AAT3221IJS-2.5-T1.
Does the AAT3221IJS-2.5-T1 require an input capacitor?
The AAT3221IJS-2.5-T1 does not require an input capacitor for basic regulation, but a ≥1 µF ceramic capacitor is strongly recommended when the device is located >1–2 cm from the power source. This improves line transient response and PSRR. For AAT3221IJS-2.5-T1 applications with noisy input supplies-such as those fed by switching regulators-a 2.2 µF X7R ceramic capacitor placed close to the IN pin is optimal.
Can the AAT3221IJS-2.5-T1 operate with a 1 µF output capacitor?
Yes-the AAT3221IJS-2.5-T1 is explicitly designed and characterized for stable operation with a minimum 1 µF ceramic output capacitor (X7R or X5R dielectric). Using 1 µF meets all stability, load transient, and startup requirements per the datasheet. Larger values (e.g., 2.2–4.7 µF) further improve transient response but are not necessary for baseline functionality of AAT3221IJS-2.5-T1.
What is the enable pin logic polarity for the AAT3221IJS-2.5-T1?
The AAT3221IJS-2.5-T1 uses active-high enable logic: the regulator turns on when EN ≥ 2.4 V (at VIN = 5 V) and shuts down when EN ≤ 0.8 V. This is confirmed in Table 4 and Application Information section of the datasheet. If unused, EN should be tied to VIN-not left floating-to ensure reliable operation of AAT3221IJS-2.5-T1 in production systems.
How does thermal protection work in the AAT3221IJS-2.5-T1?
The AAT3221IJS-2.5-T1 activates thermal shutdown at 140 °C junction temperature, disabling the output until die temperature falls below 120 °C (20 °C hysteresis). This protects against permanent damage during sustained overload or poor PCB heat sinking. The shutdown is fully automatic and self-recovering-no external circuitry is needed to manage thermal events for AAT3221IJS-2.5-T1.
AAT3221IJS-2.5-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AAT3221IJS-2.5-T1 FAQ
1.How can I place an order for AAT3221IJS-2.5-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT3221IJS-2.5-T1 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 AAT3221IJS-2.5-T1 reliable?
The price and inventory of AAT3221IJS-2.5-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT3221IJS-2.5-T1 is usually 5 days.
3.What payment methods are accepted for AAT3221IJS-2.5-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT3221IJS-2.5-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT3221IJS-2.5-T1?
AAT3221IJS-2.5-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT3221IJS-2.5-T1 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 AAT3221IJS-2.5-T1?
For technical support, including AAT3221IJS-2.5-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT3221IJS-2.5-T1 requirements.
6.How does Aetrix verify that AAT3221IJS-2.5-T1 is sourced from the original manufacturer or authorized distributors?
All AAT3221IJS-2.5-T1 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 AAT3221IJS-2.5-T1 meets industry standards.
7.What is the process for return or replacement of AAT3221IJS-2.5-T1?
All AAT3221IJS-2.5-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT3221IJS-2.5-T1, 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 AAT3221IJS-2.5-T1 part is unused and in its original packaging.
Return procedure for AAT3221IJS-2.5-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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