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Skyworks Solutions Inc. AAT2120IES-0.6-T1
- Part No.:
- AAT2120IES-0.6-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AAT2120IES-0.6-T1.pdf
- Description:
- IC REG BUCK ADJ 500MA 8STDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,853
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Product details
Overview
AAT2120IES-0.6-T1 from Skyworks Solutions is a 500mA, 1.8MHz monolithic step-down DC/DC converter in an STDFN22-8 package, operating from 2.7V–5.5V input and delivering adjustable output down to 0.6V with ±3% regulation accuracy. It features 45μA quiescent current, 96% peak efficiency, and integrated over-temperature/short-circuit protection-designed for space-constrained portable power rails in Bluetooth headsets and USB devices.
For engineers reviewing the AAT2120IES-0.6-T1 datasheet, AAT2120IES-0.6-T1 pinout, AAT2120IES-0.6-T1 application, or AAT2120IES-0.6-T1 equivalent, key selection criteria include its 1.8MHz switching frequency enabling <4.7μF ceramic output capacitance, 100% duty-cycle dropout operation, low-noise light-load mode, and thermal shutdown at 105°C with 15°C hysteresis.
Technical Context
The AAT2120IES-0.6-T1 implements peak current-mode control with fixed slope compensation (0.45A/μs), supporting stable operation up to 50% duty cycle without external compensation. Its high-DC-gain error amplifier references a precise 0.600V internal bandgap, enabling accurate feedback via external resistor dividers while maintaining excellent load regulation (<±0.8%) and transient response within 100μs startup time.
Internally, it integrates complementary P-channel (RDS(ON)H = 0.59Ω) and N-channel (RDS(ON)L = 0.42Ω) MOSFETs, with soft-start limiting inrush current and EN pin logic-level control (VEN(H) = 1.4V, VEN(L) = 0.6V). UVLO activates at 2.3V with 70mV hysteresis, ensuring reliable biasing across the full -40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, USB 5V, and regulated 3.3V rails without external LDO pre-regulation. |
| Output Voltage Range | 0.6V to VIN - enables core voltage scaling for low-power MCUs and RF ICs requiring sub-1V supplies. |
| Max Output Current | 500mA - sufficient for powering baseband processors, PMIC subsystems, or dual-core SoCs in portable designs. |
| Switching Frequency | 1.8MHz - allows use of compact 1.5–4.7μH inductors and 4.7μF ceramic capacitors, minimizing PCB area and EMI filter size. |
| Quiescent Current | 45μA typical - extends battery life in always-on sensor nodes and standby modes of handheld instruments. |
| Feedback Reference | 0.600V ±9mV - enables precise output setting with standard 1% resistors; independent of external divider accuracy per datasheet spec. |
| Thermal Shutdown | 105°C with 15°C hysteresis - protects device and system during sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
Package: Pb-free, 8-pin STDFN22-8 (2mm × 2mm × 0.55mm), with exposed thermal paddle (EP) requiring direct solder connection to PCB ground plane for optimal thermal performance (θJA = 50°C/W on FR4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VP | High-side P-MOSFET source | Connects to input capacitor anode; forms low-inductance path for high-frequency input ripple current. |
| VIN | Bias supply for internal circuitry | Must be decoupled locally; powers control logic and gate drivers independently of VP rail. |
| GND | Signal reference ground | Separate from power grounds; connects FB, EN, and internal analog blocks to minimize noise coupling. |
| FB | Resistive divider feedback node | Senses output voltage; high-impedance input (IFB ≤ 0.2μA) enables low-current divider networks for efficiency. |
| N/C | No-connect terminal | Internally unconnected; must remain floating or tied to GND per layout guidelines-no external connection. |
| EN | Enable control input | Active-high logic interface (0.6V low, 1.4V high); pulls <1μA shutdown current when grounded. |
| LX | Switching node | Drain connection of both MOSFETs; requires short, wide trace to inductor to minimize EMI and switching losses. |
| PGND | Power ground return | Return path for input/output capacitor currents and MOSFET sources; must be low-impedance copper pour tied to EP. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise light-load mode | Reduces spectral noise and ripple during standby/pulse-load conditions without compromising regulation accuracy. |
| 100% duty-cycle dropout operation | Maintains regulation as VIN approaches VOUT by bypassing switching action-critical for battery brownout resilience. |
| Integrated soft-start | Gradually ramps current limit at enable, eliminating output overshoot and reducing inrush stress on input capacitors. |
| Ultra-small STDFN22-8 footprint | 2mm × 2mm area saves >60% board space vs. comparable SO-8 or MSOP-8 buck converters. |
| Over-temperature & current limit protection | Combines thermal foldback and cycle-by-cycle peak current limiting to prevent damage under short-circuit or thermal runaway. |
Applications
| Bluetooth® Headsets | Cellular Phones |
|---|---|
Use Scenario: Powering DSP, codec, and RF transceiver in compact wireless audio accessories with single Li-ion cell. IC Role / Device Role / Timing Role: Primary 1.8V/3.3V buck regulator delivering clean, low-noise supply with fast transient response to handle voice packet bursts. Use Value: 45μA quiescent current extends talk time; 1.8MHz switching avoids AM radio band interference; STDFN22-8 fits tight acoustic module layouts. | Use Scenario: Supplying application processor I/O and memory interfaces in multi-rail smartphone power architecture. IC Role / Device Role / Timing Role: Secondary buck stage generating 1.2V core or 1.8V I/O voltage from main PMIC intermediate rail. Use Value: ±3% output tolerance ensures logic margin compliance; 500mA capacity supports burst-mode CPU loads; thermal shutdown prevents overheating in stacked PCB assemblies. |
| Digital Cameras | USB Devices |
Use Scenario: Providing regulated 3.0V for image sensor and ISP in portable camcorders or action cameras. IC Role / Device Role / Timing Role: High-efficiency step-down converter handling pulsed 300–500mA loads during image capture and video encoding. Use Value: 96% peak efficiency minimizes heat near optics; 100% dropout preserves functionality as battery discharges below 3.3V; small inductor/capacitor footprint reduces lens barrel volume. | Use Scenario: Generating 3.3V or 1.8V from USB 5V bus for embedded controllers, flash memory, or USB PHY in peripherals. IC Role / Device Role / Timing Role: Standalone buck regulator replacing linear regulators to improve thermal performance and enable smaller enclosures. Use Value: <1μA shutdown current meets USB suspend requirements; EN pin enables host-controlled power gating; low EMI design passes FCC Class B emissions limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS62231DRYR | 3MHz switching frequency, 300mA max output, 2.05V–6.5V input, 0.6V reference; smaller 1.2mm × 1.6mm DSBGA package. | Higher frequency enables smaller passives but lower current rating limits use in >300mA loads like camera ISPs. | Select when board space is critical and load current ≤300mA; verify loop stability with 1μH inductors due to higher fSW. |
| Analog Devices ADP2303ARDZ-R7 | 3.3MHz fSW, 3A output, 3.0V–20V input, 0.8V reference; SOIC-8 package with higher thermal mass but larger footprint. | Designed for industrial/high-voltage inputs; overkill for 5V-input portable apps but offers superior thermal robustness. | Choose only if input voltage exceeds 5.5V or continuous load >500mA is required; not drop-in compatible due to pinout and control logic differences. |
Compared with TPS62231DRYR and ADP2303ARDZ-R7, the AAT2120IES-0.6-T1 delivers optimal balance of 500mA capability, ultra-low quiescent current, and minimal 2×2mm footprint for battery-powered USB and mobile applications-without sacrificing thermal safety or regulation precision.
Availability
AAT2120IES-0.6-T1 is available at Aetrix Electronics and suitable for Bluetooth headsets, cellular phone subsystems, and USB peripheral power management requiring stable component supply and long-term production continuity.
Supply support for AAT2120IES-0.6-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, automotive, and industrial markets.
The AAT2120IES-0.6-T1 belongs to Skyworks' SwitchReg family of high-frequency, low-noise DC/DC converters engineered specifically for portable electronics where battery life, board area, and EMI performance are critical design constraints.
FAQ
What is the minimum output voltage supported by the AAT2120IES-0.6-T1?
The AAT2120IES-0.6-T1 supports a minimum output voltage of 0.6V, set by its internal 0.600V feedback reference voltage. This allows direct generation of sub-1V core supplies for modern low-power microcontrollers and RF ICs without external amplification or level-shifting circuitry. The datasheet confirms ±3% output tolerance applies across the full 0.6V–VIN range.
Does the AAT2120IES-0.6-T1 require external compensation components?
No, the AAT2120IES-0.6-T1 features fully internal loop compensation optimized for standard 1.5–4.7μH inductors and 4.7μF ceramic output capacitors. The datasheet specifies no external compensation network is needed, simplifying design and reducing BOM count. Stability is guaranteed across all operating conditions when using recommended external components per Table 1 and Figure 1.
How does the AAT2120IES-0.6-T1 behave during input voltage dropout?
During input voltage dropout, the AAT2120IES-0.6-T1 enters 100% duty-cycle operation, where the P-channel high-side MOSFET remains fully on and the output voltage tracks VIN minus the RDS(ON)H drop (≈0.59Ω × ILOAD). This maintains regulated output down to VIN ≈ VOUT + ILOAD × 0.59Ω, extending usable battery life beyond conventional buck converter limits.
What is the maximum allowable input voltage for the AAT2120IES-0.6-T1?
The absolute maximum input voltage for the AAT2120IES-0.6-T1 is 6.0V, as specified in the Absolute Maximum Ratings table. Continuous operation above 5.5V violates the recommended operating conditions and risks permanent damage. For USB-powered applications, ensure upstream overvoltage protection clamps transients before the VP pin.
Can the AAT2120IES-0.6-T1 be used with ceramic output capacitors smaller than 4.7μF?
No-the AAT2120IES-0.6-T1 requires a minimum 4.7μF ceramic output capacitor for stable operation, as confirmed by internal voltage loop compensation design. Using smaller values degrades phase margin, increases output droop during transients, and may cause oscillation. The datasheet explicitly states "internal voltage loop compensation also limits the minimum output capacitor value to 4.7μF."
AAT2120IES-0.6-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 500mA
- Frequency - Switching:
- 1.8MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-STDFN (2x2)
AAT2120IES-0.6-T1 FAQ
1.How can I place an order for AAT2120IES-0.6-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT2120IES-0.6-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 AAT2120IES-0.6-T1 reliable?
The price and inventory of AAT2120IES-0.6-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT2120IES-0.6-T1 is usually 5 days.
3.What payment methods are accepted for AAT2120IES-0.6-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT2120IES-0.6-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT2120IES-0.6-T1?
AAT2120IES-0.6-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT2120IES-0.6-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 AAT2120IES-0.6-T1?
For technical support, including AAT2120IES-0.6-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT2120IES-0.6-T1 requirements.
6.How does Aetrix verify that AAT2120IES-0.6-T1 is sourced from the original manufacturer or authorized distributors?
All AAT2120IES-0.6-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 AAT2120IES-0.6-T1 meets industry standards.
7.What is the process for return or replacement of AAT2120IES-0.6-T1?
All AAT2120IES-0.6-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT2120IES-0.6-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 AAT2120IES-0.6-T1 part is unused and in its original packaging.
Return procedure for AAT2120IES-0.6-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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