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Skyworks Solutions Inc. AAT1110IJS-3.3-T1
- Part No.:
- AAT1110IJS-3.3-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 8-TFSOJ (0.069", 1.75mm Width)
- Datasheet:
-
AAT1110IJS-3.3-T1.pdf
- Description:
- IC REG BUCK 3.3V 800MA 8SC70JW
- Quantity:
- Payment:
- Shipping:
Inventory:4,828
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Product details
Overview
AAT1110IJS-3.3-T1 from Skyworks Solutions is a fixed-output 3.3 V, 800 mA step-down DC/DC converter with 1.4 MHz switching frequency, 27 µA no-load quiescent current, and 100% duty-cycle low-dropout operation in an SC70JW-8 package. It delivers fast transient response for microprocessor core/IO, USB device, and handheld instrument power rails.
For engineers reviewing the AAT1110IJS-3.3-T1 datasheet, AAT1110IJS-3.3-T1 pinout, AAT1110IJS-3.3-T1 application, or AAT1110IJS-3.3-T1 equivalent, key selection criteria include input voltage range (2.7–5.5 V), output accuracy (±3.5%), thermal shutdown threshold (140 °C), and PGND pin multiplicity for high-current return path integrity.
Technical Context
The AAT1110IJS-3.3-T1 implements peak current mode control with fixed slope compensation (0.24 A/µs for low-VOUT variants) and integrates both high-side P-channel and low-side N-channel MOSFETs with RDS(ON) of 0.45 Ω and 0.40 Ω respectively. Its internal 0.6 V reference and fixed feedback network set VOUT = 3.3 V without external resistors.
Soft-start duration is 120 µs, UVLO activates at 2.7 V (with 100 mV hysteresis), and over-temperature protection disables switching above 140 °C with 15 °C hysteresis. The device supports 100% duty cycle operation to maintain regulation during input voltage droop down to VOUT + RDS(ON)H × ILOAD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 3.3 V ±3.5% - ensures stable logic-level supply for USB PHYs and 3.3 V I/O domains without external feedback components. |
| IOUT max | 800 mA - sufficient to power ARM Cortex-M series MCUs with peripherals active, including flash programming bursts. |
| fSW | 1.4 MHz typical - enables use of compact 4.7 µH inductors and 10 µF ceramic output capacitors, reducing board area by >40% vs. 500 kHz converters. |
| IQ (no load) | 27 µA - extends battery runtime in standby modes for portable instrumentation and PDAs. |
| Shutdown ISS | <1 µA - allows complete system power gating without leakage-induced battery drain. |
| TJ range | −40 °C to +85 °C - validated for industrial handheld terminals and automotive infotainment front-end modules. |
| Package | SC70JW-8 (2.0 mm × 2.2 mm, MSL1) - surface-mount footprint compatible with fine-pitch PCB assembly and automated optical inspection. |
Pinout & Package
SC70JW-8 package: 8-pin, 2.0 mm × 2.2 mm body, 0.5 mm pitch, exposed thermal pad (not electrically connected), JEDEC MSL1 rating (260 °C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable control input | Active-high logic interface; threshold VEN(H) = 1.4 V ensures noise immunity against 3.3 V GPIO noise; pulls internal bias off when low. |
| 2 - OUT | Feedback sense node | Internally connected to error amplifier; tied to 3.3 V output via internal resistor divider - no external components required for fixed-output operation. |
| 3 - VIN | Main power input | Accepts 2.7–5.5 V; supplies gate drivers and control circuitry; UVLO prevents startup below 2.7 V. |
| 4 - LX | Switching node | Drain connection of integrated high- and low-side MOSFETs; requires low-inductance layout to minimize EMI and voltage spikes during 1.4 MHz transitions. |
| 5 - AGND | Analog signal ground | Reference for error amplifier, oscillator, and soft-start circuitry; must be isolated from high-current PGND paths to avoid noise coupling into regulation loop. |
| 6, 7, 8 - PGND | Power ground return | Three dedicated pins for high-current return path from input/output capacitors and inductor; reduces ground bounce and improves load transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Fast load transient response | Sub-50 µs recovery from 1 mA → 600 mA step (VOUT = 1.8 V); enabled by peak current mode control and internal slope compensation. |
| 100% duty cycle operation | Maintains regulation down to VIN = VOUT + ILOAD × 0.45 Ω - critical for brownout resilience in battery-powered systems. |
| Low-noise quiescent operation | 27 µA IQ at no load - minimizes standby power loss in always-on sensor nodes and real-time clock backup supplies. |
| Integrated thermal protection | 140 °C shutdown with 15 °C hysteresis - prevents permanent damage during sustained overload or poor heatsinking in sealed enclosures. |
| High-efficiency across load range | Peak efficiency >90% at 3.3 V/400 mA (VIN = 3.6 V); maintains >80% efficiency even at 10 mA due to optimized gate drive and low RDS(ON). |
Applications
| Microprocessor Core/IO Power | USB Device Power |
|---|---|
Use Scenario: Supplying 3.3 V to ARM Cortex-M4 MCU with integrated USB controller and SPI peripherals in a portable medical sensor. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 3.3 V rail with fast transient response to handle CPU burst loads and USB enumeration current spikes. Use Value: Eliminates need for external feedback resistors and feed-forward capacitor, reducing BOM count by two components while maintaining ±3.5% output accuracy across −40 °C to +85 °C. | Use Scenario: Powering USB 2.0 transceiver and associated level-shifting logic in a battery-operated barcode scanner. IC Role / Device Role / Timing Role: Fixed 3.3 V source meeting USB specification VBUS tolerance requirements during hot-plug events and suspend/resume cycles. Use Value: 120 µs soft-start prevents inrush current exceeding USB 2.0 100 mA limit during enumeration; <1 µA shutdown current preserves battery charge during idle periods. |
| Handheld Instrument Power | Digital Camera Module Supply |
Use Scenario: Providing clean 3.3 V supply to ADC, LCD driver, and touch controller in a handheld multimeter with Li-ion battery input. IC Role / Device Role / Timing Role: Main DC/DC converter supporting dynamic load steps from display backlight activation (200 mA) to ADC sampling (500 mA). Use Value: PGND pin multiplicity (3 pins) lowers ground impedance by >60% vs. single-PGND alternatives, reducing measurement offset drift caused by ground bounce during analog acquisition. | Use Scenario: Powering image sensor interface and ISP core in a compact digital camera module with tight thermal constraints. IC Role / Device Role / Timing Role: High-frequency (1.4 MHz) buck converter enabling miniature 4.7 µH inductor and 10 µF ceramic capacitor solution. Use Value: Small SC70JW-8 footprint (2.0 mm × 2.2 mm) fits within 8 mm² camera module PCB area budget while delivering 800 mA peak current for autofocus motor drive pulses. |
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 | Fixed 3.3 V output, 300 mA max, 3 MHz switching, 17 µA IQ, 2 × 2 mm DSBGA-8 package | Limited to lower current; better suited for ultra-low-power MCU cores only, not full-system IO rails | Select when board space is tighter than 2.0 mm × 2.2 mm and load never exceeds 300 mA. |
| Analog Devices ADP2303ARMZ-R7 | Adjustable 0.8–5.5 V output, 3 A max, 600 kHz fSW, 2.5 mm × 2.5 mm MSOP-8 package | Higher current but larger footprint and slower transient response; requires external feedback resistors | Select when adjustable output and >800 mA capability are needed, accepting larger size and added BOM complexity. |
Compared with TPS62231DRYR and ADP2303ARMZ-R7, the AAT1110IJS-3.3-T1 uniquely balances 800 mA capability, 3.3 V fixed output, SC70JW-8 miniaturization, and sub-50 µs transient response - making it optimal for space-constrained, battery-powered systems requiring robust 3.3 V rail stability without design overhead.
Availability
AAT1110IJS-3.3-T1 is available at Aetrix Electronics and suitable for cellular phones, USB devices, and handheld instruments requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for AAT1110IJS-3.3-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 AAT1110IJS-3.3-T1 belongs to Skyworks' Total Power Management IC (TPMIC™) family, designed specifically for high-efficiency, fast-transient power delivery in portable and battery-operated electronics.
FAQ
What is the output voltage tolerance of the AAT1110IJS-3.3-T1 under full load?
The AAT1110IJS-3.3-T1 has a guaranteed output voltage tolerance of ±3.5% across 0–800 mA load, 2.7–5.5 V input, and −40 °C to +85 °C ambient temperature. This is specified in Table 3 of the datasheet and verified under worst-case line/load/temperature conditions, ensuring reliable 3.3 V logic-level compliance for USB and microprocessor interfaces.
Does the AAT1110IJS-3.3-T1 require external feedback resistors to set its 3.3 V output?
No, the AAT1110IJS-3.3-T1 is a fixed-output variant with internal feedback resistors configured for 3.3 V. Unlike the adjustable AAT1110-0.6 version, it eliminates the need for external R1/R2 dividers - simplifying layout, reducing component count, and improving noise immunity on the feedback path.
How does the AAT1110IJS-3.3-T1 handle input voltage dropout conditions?
The AAT1110IJS-3.3-T1 supports 100% duty cycle operation, allowing the output to track VIN minus the high-side P-channel MOSFET's RDS(ON) drop (0.45 Ω × ILOAD). This maintains regulation during brownout events down to VIN ≈ VOUT + 360 mV at 800 mA, extending usable battery life in Li-ion systems.
What thermal protection features does the AAT1110IJS-3.3-T1 include?
The AAT1110IJS-3.3-T1 incorporates junction over-temperature shutdown at 140 °C with 15 °C hysteresis. When triggered, switching halts completely until die temperature falls below 125 °C, preventing permanent damage during sustained overload or inadequate PCB copper pour. Thermal resistance θJA is 160 °C/W on standard FR4.
Can the AAT1110IJS-3.3-T1 be used with ceramic output capacitors smaller than 4.7 µF?
No - the AAT1110IJS-3.3-T1 requires a minimum 4.7 µF ceramic output capacitor for stable loop operation. This is mandated by internal voltage-loop compensation design; using less capacitance risks instability, excessive ripple, or failure to recover from large load transients, as confirmed in the Applications Information section.
AAT1110IJS-3.3-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- SwitchReg™, TPMIC™
- Package/Case:
- 8-TFSOJ (0.069", 1.75mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 800mA
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SC70JW
AAT1110IJS-3.3-T1 FAQ
1.How can I place an order for AAT1110IJS-3.3-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT1110IJS-3.3-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 AAT1110IJS-3.3-T1 reliable?
The price and inventory of AAT1110IJS-3.3-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT1110IJS-3.3-T1 is usually 5 days.
3.What payment methods are accepted for AAT1110IJS-3.3-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT1110IJS-3.3-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT1110IJS-3.3-T1?
AAT1110IJS-3.3-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT1110IJS-3.3-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 AAT1110IJS-3.3-T1?
For technical support, including AAT1110IJS-3.3-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT1110IJS-3.3-T1 requirements.
6.How does Aetrix verify that AAT1110IJS-3.3-T1 is sourced from the original manufacturer or authorized distributors?
All AAT1110IJS-3.3-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 AAT1110IJS-3.3-T1 meets industry standards.
7.What is the process for return or replacement of AAT1110IJS-3.3-T1?
All AAT1110IJS-3.3-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT1110IJS-3.3-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 AAT1110IJS-3.3-T1 part is unused and in its original packaging.
Return procedure for AAT1110IJS-3.3-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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