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Skyworks Solutions Inc. AAT3111IGU-3.3-T1
- Part No.:
- AAT3111IGU-3.3-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- SOT-23-6
- Datasheet:
-
AAT3111IGU-3.3-T1.pdf
- Description:
- IC REG CHARGE PUMP 3.3V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,683
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Product details
Overview
AAT3111IGU-3.3-T1 from Skyworks Solutions is a micro-power regulated charge pump IC delivering a stable 3.3V ±4% output via voltage-doubling architecture, operating from 1.8V–3.3V input and supporting up to 100mA load at VIN ≥ 2.5V. It features 750kHz switching frequency, 20µA quiescent current, and shutdown mode drawing <1µA - designed for space-constrained, battery-powered systems requiring low-noise, inductorless DC/DC conversion.
For engineers reviewing the AAT3111IGU-3.3-T1 datasheet, AAT3111IGU-3.3-T1 pinout, AAT3111IGU-3.3-T1 application, or AAT3111IGU-3.3-T1 equivalent, key selection criteria include input voltage range compatibility (1.8–3.3V), regulated 3.3V output tolerance (±4%), thermal/short-circuit protection behavior, SC70JW-8 package footprint, and external capacitor requirements (CIN/COUT = 10µF, CFLY = 1µF).
Technical Context
The AAT3111IGU-3.3-T1 implements a pulse-skipping regulated charge pump using four internal MOSFET switches in non-overlapping phases to double VIN and regulate VOUT via internal resistor-divider feedback and comparator control. Its oscillator operates at a fixed 750kHz free-running frequency, with switching duty cycle dynamically adjusted to maintain output regulation across varying load and input conditions.
It integrates thermal shutdown (trip at ~145°C, hysteresis ~10°C) and short-circuit current limiting (~300mA), enabling safe indefinite operation under output fault conditions. The device requires three external ceramic capacitors (CIN, COUT, CFLY) and delivers regulated output without an inductor - distinguishing it from inductive DC/DC converters in size, EMI profile, and layout sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±4% - tightly regulated output suitable for powering 3.3V logic rails, sensors, or RF modules without additional LDO post-regulation. |
| Input Voltage Range | 1.8V to 3.3V - supports single-cell Li-ion (fully discharged), NiMH, or alkaline battery inputs directly. |
| Max Output Current | 100mA at VIN ≥ 2.5V - sufficient for moderate-power peripherals like display drivers or audio codecs in portable devices. |
| Quiescent Current | 20µA - enables multi-week standby in always-on battery applications such as remote controls or wearables. |
| Shutdown Current | <1µA - reduces system-level leakage during deep sleep, critical for energy harvesting or coin-cell designs. |
| Switching Frequency | 750kHz - allows use of small 1µF flying capacitor and minimizes low-frequency ripple while avoiding AM band interference. |
| ESD Rating | 2kV HBM - provides robustness against handling and board-level ESD events in consumer assembly environments. |
Pinout & Package
Package: SC70JW-8 (Pb-free, surface-mount, 2.0mm × 2.1mm footprint, 0.5mm pitch). Thermal resistance θJA = 150°C/W; rated for -40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Primary ground reference for internal circuitry and charge pump return path; must be connected to low-impedance PCB ground plane. |
| 2 | GND | Secondary ground terminal - improves thermal dissipation and reduces ground bounce in high-transient-current operation. |
| 3 | GND | Third ground connection - enhances noise immunity and stabilizes internal bias networks under dynamic load. |
| 4 | C+ | Flying capacitor positive terminal - connects to high-side plate of CFLY; carries high di/dt switching current; requires shortest possible trace. |
| 5 | VIN | Main input supply pin - bypassed externally with ≥6.8µF low-ESR capacitor to suppress input ripple and support peak charging current. |
| 6 | C- | Flying capacitor negative terminal - completes charge transfer loop; paired with C+ to form switched-capacitor doubler stage. |
| 7 | SHDN | Active-low enable control - logic low disables switching and reduces supply current to <1µA; VIH = 1.4V, VIL = 0.3V. |
| 8 | VOUT | Regulated output - delivers 3.3V ±4% to load; requires ≥6.8µF low-ESR capacitor to ground for stability and ripple suppression. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor topology | Eliminates magnetic components and associated EMI, simplifying layout and reducing BOM count in compact handhelds. |
| Pulse-skipping regulation | Maintains tight output voltage accuracy (±4%) across 0–100mA load while minimizing light-load power loss. |
| Thermal & short-circuit protection | Auto-recovers after junction cools below 135°C, enabling fault-tolerant operation in unattended battery systems. |
| Low-ESR capacitor optimization | Specified for ceramic capacitors (X7R/X5R, ≤100mΩ ESR), ensuring predictable transient response and ripple performance. |
| High-frequency 750kHz operation | Enables use of 1µF flying capacitor - reducing solution size by >50% vs. lower-frequency charge pumps requiring ≥10µF CFLY. |
Applications
| Handheld Electronics | Digital Cameras |
|---|---|
Use Scenario: Powering image sensor interface and LCD backlight driver from single-cell battery. IC Role / Device Role / Timing Role: Regulated 3.3V charge pump supplying clean, stable rail for analog front-end and digital logic blocks. Use Value: Enables full functionality down to 1.8V battery voltage while maintaining 3.3V compliance - extending usable battery life by ~18% vs. linear regulators. |
Use Scenario: Providing auxiliary 3.3V supply for CMOS image sensor and flash memory controller. IC Role / Device Role / Timing Role: Inductorless voltage booster replacing discrete boost converter to reduce PCB area and EMI emissions. Use Value: Achieves <25mVP-P ripple at 50mA load with 10µF/1µF capacitor set - meeting sensor analog supply noise requirements without added filtering. |
| MP3 Players | PDA Systems |
Use Scenario: Generating 3.3V core voltage for audio DAC and microcontroller from aging alkaline cells. IC Role / Device Role / Timing Role: Micro-power regulated charge pump operating efficiently at ultra-light loads (<100µA standby). Use Value: 20µA quiescent current extends shelf-life in retail packaging and enables multi-month playback on two AA cells. |
Use Scenario: Supplying 3.3V I/O rail for touch controller, SD card interface, and wireless transceiver in legacy PDA design. IC Role / Device Role / Timing Role: Compact, thermally robust voltage booster supporting intermittent high-current bursts (e.g., Wi-Fi transmit). Use Value: Integrated thermal protection prevents shutdown during 100mA transmit pulses - eliminating need for external thermal monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60403DBVR | 3.3V output, 60mA max, 1MHz switching, SOT23-5 package, no SHDN pin. | Limited output current and missing enable control restrict use in burst-mode or low-power sleep systems. | Select when board space is constrained and 60mA load suffices; verify absence of SHDN does not impact system power sequencing. |
| MAX682ESA+ | 3.3V output, 125mA max, 125kHz switching, SO8 package, higher quiescent current (120µA). | Lower switching frequency increases required CFLY size (10µF) and output ripple; larger footprint impacts miniaturized designs. | Prefer where cost sensitivity outweighs size/efficiency trade-offs and thermal margin exceeds 145°C requirement. |
Compared with TPS60403DBVR and MAX682ESA+, the AAT3111IGU-3.3-T1 offers superior combination of 100mA capability, 20µA IQ, integrated SHDN, and SC70JW-8 compactness - making it optimal for next-generation ultra-portable devices demanding both performance and minimal footprint.
Availability
AAT3111IGU-3.3-T1 is available at Aetrix Electronics and suitable for handheld electronics, digital cameras, and MP3 players requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for AAT3111IGU-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 mobile, automotive, and IoT markets, with leadership in RF, timing, and power management ICs.
The AAT3111IGU-3.3-T1 belongs to Skyworks' MicroPower™ regulated charge pump family, engineered specifically for ultra-low-power, inductorless DC/DC conversion in space- and energy-constrained portable electronics.
FAQ
What is the minimum input voltage required for AAT3111IGU-3.3-T1 to regulate 3.3V output?
The AAT3111IGU-3.3-T1 requires a minimum input voltage of 1.8V to maintain regulated 3.3V output across its specified load range. At VIN = 1.8V, it delivers up to 20mA with full ±4% regulation; output remains functional but unregulated below 1.8V. This threshold enables direct operation from deeply discharged single-cell batteries, a key design advantage over higher-VIN alternatives.
Does AAT3111IGU-3.3-T1 require external compensation components?
No, the AAT3111IGU-3.3-T1 uses internal compensation and requires no external resistors or capacitors for loop stability. Its regulation loop is fully integrated, relying only on the three mandatory external capacitors (CIN, COUT, CFLY) for energy storage and filtering. This simplifies design validation and eliminates tuning steps during prototyping.
Can AAT3111IGU-3.3-T1 drive a 100mA load continuously at 1.8V input?
No - at VIN = 1.8V, the AAT3111IGU-3.3-T1 supports only 20mA continuous output while maintaining 3.3V ±4% regulation. To deliver 100mA, VIN must be ≥2.5V per the datasheet's electrical characteristics table. Attempting 100mA at 1.8V will cause output droop beyond specification and may trigger thermal protection under prolonged operation.
What is the recommended flying capacitor value for AAT3111IGU-3.3-T1 in standard operation?
The recommended flying capacitor (CFLY) value for AAT3111IGU-3.3-T1 in standard operation is 1µF, using X7R or X5R dielectric ceramic capacitors with ESR ≤100mΩ. This value balances efficiency, ripple, and physical size; deviations require re-evaluation of output ripple and transient response per the datasheet's capacitor selection guidelines.
How does the thermal protection mechanism behave during sustained short-circuit on AAT3111IGU-3.3-T1?
During sustained output short-circuit, the AAT3111IGU-3.3-T1 enters thermal shutdown at ~145°C junction temperature, halting switching until die cools to ~135°C (10°C hysteresis), then automatically resumes operation. This cycling continues indefinitely without damage, allowing safe integration into systems lacking external fault management - a verified behavior confirmed in the datasheet's Functional Description section.
AAT3111IGU-3.3-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- MicroPower™, TPMIC™
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 3.3V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA
- Frequency - Switching:
- 750kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AAT3111IGU-3.3-T1 FAQ
1.How can I place an order for AAT3111IGU-3.3-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT3111IGU-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 AAT3111IGU-3.3-T1 reliable?
The price and inventory of AAT3111IGU-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 AAT3111IGU-3.3-T1 is usually 5 days.
3.What payment methods are accepted for AAT3111IGU-3.3-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT3111IGU-3.3-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT3111IGU-3.3-T1?
AAT3111IGU-3.3-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT3111IGU-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 AAT3111IGU-3.3-T1?
For technical support, including AAT3111IGU-3.3-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT3111IGU-3.3-T1 requirements.
6.How does Aetrix verify that AAT3111IGU-3.3-T1 is sourced from the original manufacturer or authorized distributors?
All AAT3111IGU-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 AAT3111IGU-3.3-T1 meets industry standards.
7.What is the process for return or replacement of AAT3111IGU-3.3-T1?
All AAT3111IGU-3.3-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT3111IGU-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 AAT3111IGU-3.3-T1 part is unused and in its original packaging.
Return procedure for AAT3111IGU-3.3-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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