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Skyworks Solutions Inc. AAT1189IRN-0.6-T1
- Part No.:
- AAT1189IRN-0.6-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
AAT1189IRN-0.6-T1.pdf
- Description:
- IC REG CONV BUCK 1.5A 16TDFN
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Product details
Overview
AAT1189IRN-0.6-T1 from Skyworks Solutions is a high-voltage, non-synchronous step-down (Buck) DC/DC regulator with integrated high-side MOSFET, 6V–24V input range, adjustable 1.5V–5.5V output, and 2.5A continuous output current. It operates at a fixed 490kHz switching frequency, features voltage-mode control, and targets low-cost 12V AC/DC adapter-powered systems such as DSL modems and satellite set-top boxes.
For engineers reviewing the AAT1189IRN-0.6-T1 datasheet, AAT1189IRN-0.6-T1 pinout, AAT1189IRN-0.6-T1 application, or AAT1189IRN-0.6-T1 equivalent, key selection criteria include its TDFN34-16 package thermal performance, programmable over-current protection via RS/OS pins, soft-start timing of 2.5ms, and ±2.5% output voltage accuracy across load and temperature.
Technical Context
The AAT1189IRN-0.6-T1 implements voltage-mode PWM control with a fixed 490kHz oscillator, enabling stable regulation across 1.5V–5.5V outputs while supporting up to 85% duty cycle. Its internal 70mΩ high-side MOSFET and external Schottky diode architecture define it as a cost-optimized asynchronous buck solution.
Protection functions are tightly integrated: over-current sensing uses differential voltage monitoring between RS and OS pins (100mV nominal threshold), over-temperature shutdown triggers at 135°C with 15°C hysteresis, and soft-start is internally controlled with 2.5ms ramp time - all without requiring external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.0V to 24.0V - supports universal 12V adapter inputs and industrial 24V rails without pre-regulation. |
| Output Voltage Range | 1.5V to 5.5V - set by external resistor divider on FB pin; minimum 1.5V ensures compatibility with modern logic supplies. |
| Max Output Current | 2.5A continuous - achievable with proper PCB heatsinking via exposed paddle (EP) in TDFN34-16 package. |
| Switching Frequency | 490kHz (typical) - enables compact 4.7µH inductor and small ceramic output capacitors (2×22µF). |
| Feedback Reference | 0.600V ±9mV - precise internal reference enables ±2.5% output accuracy over full load and temperature range. |
| Quiescent Current | 0.6mA - maintains efficiency in light-load operation; drops to <35μA in shutdown mode. |
| Thermal Shutdown | 135°C with 15°C hysteresis - protects die during overload or poor airflow; self-recovering after cooldown. |
Pinout & Package
The AAT1189IRN-0.6-T1 is housed in a Pb-free, low-profile 3mm × 4mm TDFN34-16 package with exposed paddle (EP) internally connected to IN for enhanced thermal dissipation. The EP must be soldered to a PCB thermal plane for optimal junction temperature management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX (Pins 1,2,3,4,5,15,16) | Switching node | Connects directly to inductor; carries high di/dt pulsed current; all LX pins must be tied together externally. |
| BST (Pin 6) | Bootstrap drive | Supplies gate drive for internal high-side MOSFET via 100nF capacitor to LX; critical for proper high-side conduction. |
| EN (Pin 7) | Enable input | Active-high logic control (2.5V threshold); allows system-level power sequencing and standby mode. |
| RS (Pin 8) | Current sense input | Differential input with OS pin to monitor inductor DCR voltage drop for over-current protection. |
| OS (Pin 9) | Current sense reference | Paired with RS to detect 100mV differential threshold; enables true-load current limiting independent of output voltage. |
| COMP (Pin 10) | Loop compensation | Connects external RC network to stabilize voltage-mode control loop; supports Type III compensation. |
| FB (Pin 11) | Feedback input | Monitors output via resistor divider; internal 0.600V reference sets VOUT = 0.6 × (1 + R4/R5). |
| GND (Pin 12) | Power ground | Return path for input/output capacitors; must be placed near high-current paths to minimize noise coupling. |
| VL (Pin 13) | Internal LDO output | Provides regulated bias voltage; requires 2.2µF/6.3V capacitor to GND for stability and noise suppression. |
| IN (Pin 14) | Main power input | Accepts 6V–24V supply; connects to EP for thermal conduction; requires local 0.1µF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Delivers consistent transient response and loop stability across full 1.5V–5.5V output range without mode switching. |
| Programmable over-current protection | Configurable trip point via RS/OS differential sensing and optional resistor network (R6/R7/R8) for precise current limit tuning. |
| Integrated soft-start | Fixed 2.5ms ramp time prevents inrush current and output overshoot during enable; no external capacitor required. |
| Thermal protection with hysteresis | Shuts down at 135°C and remains off until die cools to 120°C, preventing thermal cycling damage during sustained overload. |
| TDFN34-16 with exposed paddle | 50°C/W θJA enables 2.5A operation at 85°C ambient when EP is connected to ≥1in² copper area; supports high-power density designs. |
Applications
| DSL and Cable Modems | Notebook Computers |
|---|---|
Use Scenario: Powering Ethernet PHY, DSP, and memory subsystems from 12V wall adapter in space-constrained residential gateway units. IC Role / Device Role / Timing Role: Primary 3.3V/2.5A buck regulator supplying core logic and interface ICs; replaces discrete controller + MOSFET solutions. Use Value: 490kHz switching enables use of 4.7µH inductor and 2×22µF ceramic output caps, reducing board area by >30% vs. lower-frequency alternatives. | Use Scenario: Generating 5.0V rail for USB ports, display backlight drivers, and peripheral controllers in thin-and-light notebooks. IC Role / Device Role / Timing Role: Secondary high-efficiency buck converter downstream of main battery or adapter input; handles dynamic load steps up to 2.5A. Use Value: ±2.5% output accuracy and <2.5ms soft-start ensure reliable USB enumeration and prevent brownout resets during hot-plug events. |
| Satellite Set Top Box | Wireless LAN Systems |
Use Scenario: Delivering stable 3.3V supply to QAM demodulator, MPEG decoder, and HDMI transmitter under variable thermal conditions. IC Role / Device Role / Timing Role: Main system power regulator operating from 12V input; manages 2.5A peak loads during channel change and video decode bursts. Use Value: Over-temperature shutdown at 135°C and 15°C hysteresis prevents latch-up in sealed enclosures with limited airflow. | Use Scenario: Providing 5.0V to RF power amplifier stages and baseband processors in 802.11ac access points with high ambient temperature exposure. IC Role / Device Role / Timing Role: High-current DC/DC stage converting 12V PoE input to clean 5V for sensitive analog/RF circuitry. Use Value: Low 70mΩ RDS(ON) and voltage-mode control minimize output ripple (<20mV pk-pk at 2.5A), preserving EVM in WLAN transmitters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 4.5V–36V input, 2A max, 500kHz fixed frequency, no integrated BST capacitor requirement. | Wider VIN range suits 24V industrial systems; lower current rating limits use in 2.5A+ applications. | Select when input exceeds 24V or when simpler BST layout is prioritized over 2.5A capability. |
| TPS54227DDAR | 4.5V–18V input, 2.2A max, adaptive on-time control, integrated high-/low-side FETs. | Lower VIN ceiling excludes 24V adapter use; synchronous rectification improves light-load efficiency. | Prefer for battery-powered or 12V-only systems where >90% efficiency at 100mA matters more than 24V support. |
Compared with MP2451DT-LF-Z and TPS54227DDAR, the AAT1189IRN-0.6-T1 uniquely supports 24V input and 2.5A output in a thermally optimized TDFN34-16 package, making it the only option among the three qualified for 12V/24V adapter-fed consumer broadband equipment requiring robust over-current and thermal protection.
Availability
AAT1189IRN-0.6-T1 is available at Aetrix Electronics and suitable for DSL modems, satellite set-top boxes, and wireless LAN access points requiring stable component supply, long-term lifecycle support, and guaranteed Pb-free compliance.
Supply support for AAT1189IRN-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, broadband, automotive, and industrial markets.
The AAT1189IRN-0.6-T1 belongs to Skyworks' high-voltage DC/DC regulator product line, designed specifically for cost-sensitive consumer communications equipment powered by low-cost 12V AC/DC adapters.
FAQ
What is the recommended input capacitor configuration for AAT1189IRN-0.6-T1?
AAT1189IRN-0.6-T1 requires a 100µF/25V electrolytic capacitor (C1) plus a 0.1µF ceramic capacitor (C2) placed as close as possible to the IN pin (Pin 14). The electrolytic capacitor suppresses low-frequency ripple from the AC/DC adapter, while the ceramic capacitor provides high-frequency decoupling to minimize switching noise coupling into the control circuitry. Both capacitors must share a low-inductance return path to GND (Pin 12).
Does AAT1189IRN-0.6-T1 support adjustable current limiting, and how is it implemented?
Yes, AAT1189IRN-0.6-T1 supports programmable over-current protection via its RS and OS pins. The device triggers at a nominal 100mV differential between these pins, corresponding to the voltage drop across the inductor's DCR. To adjust the trip point, external resistors R6, R7, or R8 can be added per Figure 2 and Figure 3 in the datasheet - enabling precise current limit tuning for different inductors or safety margins without changing the core IC.
What is the function of the VL pin on AAT1189IRN-0.6-T1, and what capacitor value is required?
The VL pin on AAT1189IRN-0.6-T1 provides the output of an internal linear regulator that powers the control circuitry. It must be bypassed with a 2.2µF/6.3V ceramic capacitor connected directly to GND (Pin 12) to ensure stable operation and low-noise biasing. This capacitor filters switching noise coupled through the internal regulator and prevents oscillation or erratic enable behavior during transient events.
Can AAT1189IRN-0.6-T1 operate with an output voltage below 1.5V?
No, AAT1189IRN-0.6-T1 does not support output voltages below 1.5V. Its internal feedback reference is 0.600V, and the datasheet specifies a minimum output voltage of 1.5V - corresponding to a resistor divider ratio of (1.5V − 0.6V)/0.6V = 1.5. Attempting to set VOUT lower risks violating the FB pin's common-mode range and results in inaccurate regulation or failure to regulate.
How does the thermal protection mechanism work in AAT1189IRN-0.6-T1?
AAT1189IRN-0.6-T1 incorporates a dedicated thermal protection circuit that monitors die temperature and shuts down the high-side MOSFET when junction temperature exceeds 135°C. The device remains latched off until the die cools to approximately 120°C (15°C hysteresis), preventing thermal cycling. During shutdown, EN remains active and COMP retains its voltage, allowing fast recovery once thermal limits are restored - critical for unattended broadband equipment.
AAT1189IRN-0.6-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AAT1189IRN-0.6-T1 FAQ
1.How can I place an order for AAT1189IRN-0.6-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT1189IRN-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 AAT1189IRN-0.6-T1 reliable?
The price and inventory of AAT1189IRN-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 AAT1189IRN-0.6-T1 is usually 5 days.
3.What payment methods are accepted for AAT1189IRN-0.6-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT1189IRN-0.6-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT1189IRN-0.6-T1?
AAT1189IRN-0.6-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT1189IRN-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 AAT1189IRN-0.6-T1?
For technical support, including AAT1189IRN-0.6-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT1189IRN-0.6-T1 requirements.
6.How does Aetrix verify that AAT1189IRN-0.6-T1 is sourced from the original manufacturer or authorized distributors?
All AAT1189IRN-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 AAT1189IRN-0.6-T1 meets industry standards.
7.What is the process for return or replacement of AAT1189IRN-0.6-T1?
All AAT1189IRN-0.6-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT1189IRN-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 AAT1189IRN-0.6-T1 part is unused and in its original packaging.
Return procedure for AAT1189IRN-0.6-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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