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Skyworks Solutions Inc. AAT1218IWP-3.3-T1
- Part No.:
- AAT1218IWP-3.3-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
AAT1218IWP-3.3-T1.pdf
- Description:
- IC REG BOOST 3.3V 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,831
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Product details
Overview
AAT1218IWP-3.3-T1 from Skyworks Solutions is a fixed-output, 3.3V synchronous boost converter delivering up to 1A continuous output current with 1.2MHz switching frequency, ±2% output voltage accuracy, and 95% peak efficiency-designed for single-cell Li+ battery-powered portable electronics requiring compact, high-efficiency step-up regulation.
For engineers reviewing the AAT1218IWP-3.3-T1 datasheet, AAT1218IWP-3.3-T1 pinout, AAT1218IWP-3.3-T1 application, or AAT1218IWP-3.3-T1 equivalent, key selection considerations include its TDFN33-12 package, integrated soft-start (0.7ms), anti-ringing EMI suppression, <400μA quiescent current, and absence of external feedback resistors due to factory-trimmed 3.3V output.
Technical Context
The AAT1218IWP-3.3-T1 employs slope-compensated current-mode PWM control at a fixed 1.2MHz frequency, enabling small external inductors (<1.8mm height) and ceramic capacitors. Its internal NMOS/PMOS power switches feature 180mΩ and 250mΩ on-resistance respectively, supporting operation down to 0.5V input after startup.
It integrates an anti-ringing circuit to dampen LX-node oscillation during discontinuous conduction, a dedicated shutdown path with <1μA current draw, and cycle-by-cycle current limiting (2.0A min) with over-temperature protection-ensuring robustness across portable consumer applications from MP3 players to smart phones.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - eliminates need for external resistor divider; optimized for USB-peripheral and low-voltage logic rails. |
| Max Output Current | 1A continuous - supports high-current peripherals like LCD backlights or SD card interfaces from single-cell batteries. |
| Switching Frequency | 1.2MHz (±25%) - enables use of compact 2.2µH inductors and low-ESR ceramic output capacitors (e.g., 2×22µF). |
| Input Voltage Range | 0.5V to (VOUT − 0.5V) = 0.5V–2.8V - allows operation from partially discharged Li+ cells (down to ~0.85V startup). |
| Quiescent Current | <400μA at no load - extends battery life in standby modes of portable devices. |
| Shutdown Current | <1μA - ensures near-zero drain during system sleep or power-off states. |
| Efficiency | Up to 95% at 1A - minimizes thermal stress and PCB area, eliminating need for heatsinking in space-constrained designs. |
Pinout & Package
Package: Pb-free, 12-pin low-profile TDFN33 (3.0mm × 3.0mm × 0.75mm), rated for −40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX | Switching node | Connects to inductor; carries high-frequency pulsed current; requires short, wide trace to minimize EMI and losses. |
| VIN | Input supply | Accepts 0.5V–2.8V; powers internal circuitry during startup; supplies gate drivers during normal operation. |
| EN | Enable control | Logic-level input (VEN(H) ≥ 0.85V @ VOUT=3.3V); pulls device into shutdown (<1μA) when low. |
| GND (Pins 6,7) | Signal ground | Reference for FB, EN, and internal analog blocks; must be separated from PGND in layout. |
| FB | Feedback input | Internally connected to 1.20V reference; left unconnected for fixed 3.3V version (AAT1218IWP-3.3-T1). |
| OUT (Pins 9,10) | Regulated output | Delivers 3.3V @ up to 1A; connects directly to output capacitor and load; low-impedance path critical for transient response. |
| PGND (Pins 11,12) | Power ground | High-current return for VIN, LX, and OUT; must tie directly to input/output capacitor grounds with minimal impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode for 3.3V output (VOUT < 4.5V), reducing BOM count and conduction loss. |
| Integrated soft-start | 0.7ms controlled ramp limits inrush current during power-up, preventing input rail collapse and system reset. |
| Anti-ringing circuit | Dampens high-frequency oscillation at LX node during light-load DCM, lowering radiated EMI without external snubbers. |
| Current-mode control | Provides inherent cycle-by-cycle current limiting (2.0A min), fast transient response, and stable operation without external compensation. |
| Low-noise power saving mode | Skips pulses at light load to maintain regulation while reducing switching losses and improving light-load efficiency. |
Applications
| Smartphone Display Backlight | USB OTG Power Rail |
|---|---|
Use Scenario: Driving white LED strings or AMOLED display bias from a 3.6V Li+ battery. IC Role / Device Role / Timing Role: Fixed 3.3V synchronous boost regulator supplying stable, low-noise power to display driver ICs. Use Value: Delivers 1A at 95% efficiency with <80mVpp ripple, enabling thin form factors and extended battery runtime. |
Use Scenario: Providing regulated 3.3V VBUS to USB peripherals during host mode (OTG) from a single-cell battery. IC Role / Device Role / Timing Role: Step-up converter ensuring compliant USB power delivery despite battery voltage sag below 3.3V. Use Value: Supports full-speed USB signaling with fast load transient response (<10% deviation) and <400μA quiescent draw in idle. |
| Portable HDD Preamp Supply | MP3 Player Audio Codec Bias |
Use Scenario: Generating clean 3.3V rail for hard disk drive read/write channel preamplifiers in portable storage. IC Role / Device Role / Timing Role: High-efficiency boost converter with low output ripple and integrated EMI suppression. Use Value: Minimizes noise coupling into sensitive analog front-end circuits, preserving SNR and data integrity. |
Use Scenario: Powering audio DAC/ADC and headphone amplifier stages in battery-operated MP3 players. IC Role / Device Role / Timing Role: Fixed-output DC/DC regulator delivering low-noise, tightly regulated 3.3V from 2.8–4.2V battery range. Use Value: Enables >10-hour playback via 95% efficiency and <1μA shutdown current, with no external feedback components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610992DRCR | Fixed 3.3V output; 1.2MHz switching; 1.2A max; 300nA shutdown current; smaller 2mm × 2mm WSON-6 package. | Lacks anti-ringing circuit and integrated soft-start timing control; lower max current rating (1.2A vs 1A continuous). | Preferred where ultra-low shutdown current and minimal footprint outweigh need for EMI mitigation and precise start-up control. |
| MAX17062ETA+ | Adjustable 2.5–5.5V output; 1.1MHz switching; 1.2A max; includes I²C interface for dynamic voltage scaling. | Requires external resistor divider; adds complexity and board area; not pin-compatible; supports programmable features absent in AAT1218IWP-3.3-T1. | Chosen when system-level flexibility (e.g., adaptive output voltage) justifies added design effort and cost premium. |
Compared with TPS610992DRCR and MAX17062ETA+, the AAT1218IWP-3.3-T1 offers superior EMI performance via anti-ringing, guaranteed 1A continuous output with robust thermal design (TDFN33-12, θJA = 50°C/W), and zero-component simplicity for fixed 3.3V use cases-making it optimal for cost-sensitive, high-volume portable consumer designs.
Availability
AAT1218IWP-3.3-T1 is available at Aetrix Electronics and suitable for smartphone display backlighting, USB OTG power rails, portable HDD preamp supplies, and MP3 player audio codec biasing requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for AAT1218IWP-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, automotive, and industrial markets.
The AAT1218 product line was developed specifically for high-efficiency, low-voltage portable power conversion-targeting battery-powered consumer electronics where size, efficiency, and ease of implementation are critical design constraints.
FAQ
What is the output voltage tolerance of the AAT1218IWP-3.3-T1?
The AAT1218IWP-3.3-T1 delivers a factory-trimmed fixed output voltage of 3.3V with ±2% accuracy over temperature (−40°C to +85°C) and line/load conditions, as specified in the Electrical Characteristics table under VOUT_RANGE and confirmed by VFB = 1.200V ±3% reference tolerance. This tight tolerance ensures reliable operation of 3.3V logic and interface circuits without external calibration.
Does the AAT1218IWP-3.3-T1 require external feedback resistors?
No, the AAT1218IWP-3.3-T1 does not require external feedback resistors. As a fixed-output variant, its internal feedback network is laser-trimmed during manufacturing to deliver 3.3V; the FB pin is internally connected and must remain unconnected (floating) in the application circuit per the datasheet's Application Information section.
What is the minimum input voltage required for the AAT1218IWP-3.3-T1 to start up?
The AAT1218IWP-3.3-T1 has a typical startup voltage of 0.85V at 1mA load and a minimum startup voltage of 1.0V under 300mA resistive load, as documented in the Electrical Characteristics table. It operates continuously from 0.5V input once started, making it suitable for deeply discharged single-cell Li+ batteries.
How does the anti-ringing circuit in the AAT1218IWP-3.3-T1 reduce EMI?
The anti-ringing circuit in the AAT1218IWP-3.3-T1 actively clamps the LX node voltage to VIN during light-load discontinuous conduction mode, suppressing high-frequency parasitic oscillation caused by MOSFET and inductor stray elements. This reduces radiated EMI without external snubbers, as verified in Typical Characteristics waveforms and Functional Description section.
Can the AAT1218IWP-3.3-T1 be used with a 5V input source?
No-the AAT1218IWP-3.3-T1 is a boost converter and requires VIN < VOUT. With a fixed 3.3V output, the maximum allowable input is VOUT − 0.5V = 2.8V. Applying 5V to VIN exceeds absolute maximum ratings (LX/VIN voltage to PGND = −0.3V to 6.0V), risks permanent damage, and violates functional operating conditions defined in the datasheet.
AAT1218IWP-3.3-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
AAT1218IWP-3.3-T1 FAQ
1.How can I place an order for AAT1218IWP-3.3-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT1218IWP-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 AAT1218IWP-3.3-T1 reliable?
The price and inventory of AAT1218IWP-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 AAT1218IWP-3.3-T1 is usually 5 days.
3.What payment methods are accepted for AAT1218IWP-3.3-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT1218IWP-3.3-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT1218IWP-3.3-T1?
AAT1218IWP-3.3-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT1218IWP-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 AAT1218IWP-3.3-T1?
For technical support, including AAT1218IWP-3.3-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT1218IWP-3.3-T1 requirements.
6.How does Aetrix verify that AAT1218IWP-3.3-T1 is sourced from the original manufacturer or authorized distributors?
All AAT1218IWP-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 AAT1218IWP-3.3-T1 meets industry standards.
7.What is the process for return or replacement of AAT1218IWP-3.3-T1?
All AAT1218IWP-3.3-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT1218IWP-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 AAT1218IWP-3.3-T1 part is unused and in its original packaging.
Return procedure for AAT1218IWP-3.3-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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