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Skyworks Solutions Inc. AAT2522IRN-1-T1
- Part No.:
- AAT2522IRN-1-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 16-VFDFN Exposed Pad
- Datasheet:
-
AAT2522IRN-1-T1.pdf
- Description:
- IC REG BUCK ADJ 3A DL 16TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:197
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Product details
Overview
AAT2522IRN-1-T1 from Skyworks Solutions is a dual-channel, high-current synchronous step-down DC/DC regulator IC delivering up to 3.0A per channel with input range 2.7V–5.5V, adjustable output 0.6V–VIN, 1.4MHz fixed switching frequency, and integrated 120mΩ P-channel high-side + 85mΩ N-channel low-side MOSFETs-designed for portable digital cameras, netbooks, and PoE-powered media devices.
For engineers reviewing the AAT2522IRN-1-T1 datasheet, AAT2522IRN-1-T1 pinout, AAT2522IRN-1-T1 application, or AAT2522IRN-1-T1 equivalent, key selection criteria include dual independent enable control (EN1/EN2), no external compensation requirement, ultra-low 90μA no-load quiescent current, <1μA shutdown current, and thermal/short-circuit protection with 140°C over-temperature threshold.
Technical Context
The AAT2522IRN-1-T1 implements peak current-mode control with fixed slope compensation for stability at duty cycles >50%, enabling fast transient response and eliminating need for external loop compensation. Each regulator operates independently with dedicated INx, VCCx, ENx, LXx, FBx, PGNDx, and AGNDx terminals.
It features 100% duty-cycle operation enabled by ultra-low RDS(ON) MOSFETs (120mΩ HS / 85mΩ LS), supporting high-output-voltage regulation (e.g., 3.3V out from 3.6V in) near dropout. Feedback thresholds are 0.6V on FB2 and 0.6V on FB1 (typical 600mV, ±9mV tolerance), with internal soft-start (150μs) and UVLO (2.7V rising, 0.25V hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion (3.0–4.2V), USB 5V, and wide-input portable rails. |
| Output Current per Channel | Up to 3.0A - enables direct powering of high-current cores, FPGAs, or DDR memory banks without external boost stages. |
| Switching Frequency | 1.4MHz - allows use of compact 1.2–3.3μH inductors and ceramic output capacitors ≤22μF. |
| No-Load Quiescent Current | 90μA - minimizes battery drain in always-on standby modes of portable systems. |
| Shutdown Current | <1μA - ensures negligible leakage during system sleep or power-off states. |
| FB Regulation Threshold | 0.6V (FB1/FB2) - sets minimum output voltage; enables precise 1.2V, 1.8V, 2.5V, or 3.3V generation via standard resistor dividers. |
| Thermal Shutdown Threshold | 140°C with 15°C hysteresis - protects silicon and PCB during sustained overload or poor heatsinking. |
Pinout & Package
The AAT2522IRN-1-T1 is housed in a Pb-free, thermally enhanced 16-pin TDFN package measuring 3mm × 4mm with exposed pad (EP) for improved heat dissipation. Pin numbering follows top-view layout per datasheet Figure 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC2 | Bias supply for Regulator #2 | Provides internal LDO bias; must be decoupled locally to AGND2; accepts 2.7–6V. |
| EN2 | Enable input for Regulator #2 | Logic-high (>1.4V) enables channel 2; logic-low (<0.6V) forces shutdown and reduces VCC2 current to <1μA. |
| IN2 | Power input for Regulator #2 | Primary power path for channel 2; rated -0.3V to +6V; RMS current capability ±3.0A. |
| EN1 | Enable input for Regulator #1 | Independent control of channel 1; identical logic thresholds and shutdown behavior as EN2. |
| VCC1 | Bias supply for Regulator #1 | Separate bias rail for channel 1; decoupling required to AGND1; same voltage rating as VCC2. |
| IN1 | Power input for Regulator #1 | Dual IN1 pins (pins 6–7) share same node; designed for low-impedance connection to input source. |
| LX1 | Switching node for Regulator #1 | Drain connection of internal HS P-MOSFET and LS N-MOSFET; connects externally to inductor. |
| PGND1 | Power ground for Regulator #1 | Source of internal LS N-MOSFET; must be routed separately from analog ground to minimize noise coupling. |
| FB1 | Feedback input for Regulator #1 | Senses output voltage via resistive divider; regulation threshold = 0.6V; max leakage = 200nA. |
| AGND1 | Analog ground for Regulator #1 | Reference for control circuitry and FB1; internally isolated from PGND1 to suppress switching noise. |
| LX2 | Switching node for Regulator #2 | Identical function to LX1 but for channel 2; requires separate inductor and LC filter. |
| PGND2 | Power ground for Regulator #2 | Source of channel 2's LS N-MOSFET; must be partitioned from PGND1 and AGND2. |
| FB2 | Feedback input for Regulator #2 | Same 0.6V threshold as FB1; supports independent output voltage programming (e.g., 1.2V + 3.3V). |
| AGND2 | Analog ground for Regulator #2 | Isolated reference for channel 2 control; ties to EP (substrate analog ground) for noise immunity. |
| EP | Exposed substrate pad | Internally connected to AGND; soldered to PCB thermal pad for junction-to-board thermal resistance reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Separate INx, ENx, VCCx, LXx, FBx, and ground pins enable asynchronous start-up, staggered sequencing, and independent fault management. |
| No external compensation | Internally compensated voltage loop eliminates need for external RC networks-reducing BOM count and layout sensitivity. |
| Low-noise light-load mode | Maintains high efficiency and low spectral noise below 150mA load-critical for audio, imaging, and RF subsystems. |
| 100% duty-cycle operation | Enables dropout-free regulation when VIN ≈ VOUT (e.g., 3.6V → 3.3V), leveraging ultra-low RDS(ON) MOSFETs (120mΩ/85mΩ). |
| Integrated soft-start | 150μs internal ramp prevents inrush current and output overshoot during enable or input application. |
Applications
| Digital Camera Power System | Netbook Core Voltage Supply |
|---|---|
Use Scenario: Dual-rail power for CMOS image sensor (1.2V analog, 2.8V I/O) and ISP processor core (1.1V) in compact handheld camera modules. IC Role / Device Role / Timing Role: Primary dual-output PMIC providing tightly regulated, low-noise, sequenced supplies with independent enable control. Use Value: Eliminates need for discrete regulators and external compensation; achieves ±0.5% output accuracy across temperature and load while maintaining 90μA quiescent draw in standby. | Use Scenario: Simultaneous 1.8V SoC I/O and 1.05V CPU core supply in fanless netbook designs with strict thermal envelope. IC Role / Device Role / Timing Role: High-efficiency dual buck converter delivering 3A per rail with 1.4MHz switching to minimize EMI and inductor size. Use Value: Enables use of 3mm × 4mm footprint and 1.5μH inductors; 95% peak efficiency at full load reduces thermal stress on thin PCBs. |
| Portable Media Player Audio Stage | Power-over-Ethernet Endpoint |
Use Scenario: Clean 3.3V DAC supply and 1.2V codec core rail in battery-powered media players where ripple-induced audio artifacts must be minimized. IC Role / Device Role / Timing Role: Low-noise, low-ripple dual regulator with dedicated analog grounds (AGND1/AGND2) and feed-forward capacitor support. Use Value: Achieves sub-10mVpp output ripple at 3A load; light-load mode preserves SNR during playback pause without burst-mode noise. | Use Scenario: Local 5V-to-3.3V/1.8V conversion in IEEE 802.3af/at PD devices where input voltage varies from 37V to 57V (post-PSE rectification and filtering). IC Role / Device Role / Timing Role: Secondary-stage dual buck regulator accepting pre-regulated 5V intermediate bus derived from active PoE front-end. Use Value: Supports high-current PoE loads (e.g., Wi-Fi 6 APs) with independent channel shutdown during low-power modes-reducing total system idle power to <100μW. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-current buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270PWP | Single 3A + dual 1.5A channels; 2.95–6.5V input; requires external compensation; 2.2MHz switching. | Higher input voltage range suits 5V-only or industrial 5V bus systems; lower per-channel current limits require parallel use for 3A loads. | Choose TPS65270PWP when needing higher VIN tolerance and multi-rail flexibility beyond two 3A outputs. |
| RTQ2132B-QA | Automotive-grade AEC-Q100 qualified; 2.7–5.5V input; dual 3A; integrated spread-spectrum; 1.5MHz switching; 0.6V FB. | Qualified for automotive infotainment and ADAS; includes spread-spectrum EMI reduction not present in AAT2522IRN-1-T1. | Choose RTQ2132B-QA for automotive deployments requiring qualification and lower radiated emissions. |
Compared with TPS65270PWP and RTQ2132B-QA, the AAT2522IRN-1-T1 offers superior light-load efficiency (90μA IQ vs. ≥200μA), simpler layout (no compensation), and smaller 3mm×4mm footprint-making it optimal for space-constrained portable consumer electronics where cost and board area are critical.
Availability
AAT2522IRN-1-T1 is available at Aetrix Electronics and suitable for digital camera power systems, netbook core voltage supplies, and Power-over-Ethernet endpoint designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for AAT2522IRN-1-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 semiconductor company specializing in analog and mixed-signal connectivity solutions for wireless, broadband, automotive, and industrial markets.
The AAT2522IRN-1-T1 belongs to Skyworks' SwitchReg™ family of highly integrated DC/DC converters-designed specifically for portable, battery-powered applications demanding high efficiency, small footprint, and low-noise operation without external compensation.
FAQ
What is the maximum output current per channel for the AAT2522IRN-1-T1?
The AAT2522IRN-1-T1 delivers up to 3.0A maximum continuous output current per regulator channel under typical thermal conditions (TA = 25°C, adequate PCB copper). Peak current limit is specified at 3.61A (typical), and thermal shutdown activates at 140°C junction temperature to protect the device during sustained overload. Derating is required above 85°C ambient.
Does the AAT2522IRN-1-T1 require external compensation components?
No, the AAT2522IRN-1-T1 does not require external compensation components. Its internal voltage-loop compensation is fully optimized for stability across the full operating range-including all supported output voltages (0.6V to VIN), input voltages (2.7V to 5.5V), and load conditions (0–3A). This eliminates external RC networks and simplifies layout and qualification.
What are the feedback voltage thresholds for FB1 and FB2 on the AAT2522IRN-1-T1?
Both FB1 and FB2 have an identical regulation threshold of 0.6V (typical), with a tolerance of ±9mV (591–609mV) at TA = 25°C. This fixed reference enables precise output voltage setting using standard resistor dividers-for example, 100kΩ (RFB-GND) and 100kΩ (ROUT-FB) yields 1.2V output. Leakage current is limited to 200nA maximum.
How does the AAT2522IRN-1-T1 handle thermal overload conditions?
The AAT2522IRN-1-T1 incorporates junction-based thermal protection that disables switching when die temperature reaches 140°C, with 15°C hysteresis. Once temperature falls below 125°C, the device automatically recovers regulation without requiring reset or re-enable. This safeguard prevents permanent damage during sustained overload or inadequate heatsinking in compact enclosures.
Can the AAT2522IRN-1-T1 operate in 100% duty cycle mode, and what is its dropout behavior?
Yes, the AAT2522IRN-1-T1 supports true 100% duty cycle operation. When VIN approaches VOUT, the high-side P-channel MOSFET remains fully on (RDS(ON) = 120mΩ), allowing VOUT to track VIN minus conduction drop. For example, with 3.6V input and 3.3V output at 3A, dropout is ~360mV-enabling efficient high-VOUT regulation from low-input sources like single-cell batteries.
AAT2522IRN-1-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- SwitchReg™
- Package/Case:
- 16-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TDFN (3x4)
AAT2522IRN-1-T1 FAQ
1.How can I place an order for AAT2522IRN-1-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT2522IRN-1-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 AAT2522IRN-1-T1 reliable?
The price and inventory of AAT2522IRN-1-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT2522IRN-1-T1 is usually 5 days.
3.What payment methods are accepted for AAT2522IRN-1-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT2522IRN-1-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT2522IRN-1-T1?
AAT2522IRN-1-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT2522IRN-1-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 AAT2522IRN-1-T1?
For technical support, including AAT2522IRN-1-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT2522IRN-1-T1 requirements.
6.How does Aetrix verify that AAT2522IRN-1-T1 is sourced from the original manufacturer or authorized distributors?
All AAT2522IRN-1-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 AAT2522IRN-1-T1 meets industry standards.
7.What is the process for return or replacement of AAT2522IRN-1-T1?
All AAT2522IRN-1-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT2522IRN-1-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 AAT2522IRN-1-T1 part is unused and in its original packaging.
Return procedure for AAT2522IRN-1-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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