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Skyworks Solutions Inc. AAT3663IWO-8.4-1-T1
- Part No.:
- AAT3663IWO-8.4-1-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Battery Chargers
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
AAT3663IWO-8.4-1-T1.pdf
- Description:
- IC BATT CHG LI-ION 2CELL 14TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,624
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Product details
Overview
AAT3663IWO-8.4-1-T1 from Skyworks Solutions is a linear Li-ion battery charger IC designed for dual-cell (8.4V nominal) applications, supporting programmable fast charge current up to 1 A, precise end-of-charge voltage regulation at 8.4 V ±0.5%, and digital thermal loop control to dynamically reduce charge current under high-power-dissipation conditions. It operates from 4.0 V to 13.2 V input sources including USB and AC adapters, and integrates battery temperature sensing, automatic recharge sequencing, and dual open-drain status outputs for LED indication.
For engineers reviewing the AAT3663IWO-8.4-1-T1 datasheet, AAT3663IWO-8.4-1-T1 pinout, AAT3663IWO-8.4-1-T1 application, or AAT3663IWO-8.4-1-T1 equivalent, this page delivers verified technical context, validated pin functions, confirmed dual-cell 8.4V charging specifications, real-world application mappings, and two rigorously cross-checked alternative parts with documented functional and parametric differences.
Technical Context
The AAT3663IWO-8.4-1-T1 implements a linear charging architecture with integrated pass transistor (RDS(ON) = 330–500 mΩ), digitally controlled thermal loop activation at 115°C junction temperature and exit at 85°C, and factory-trimmed 8.4 V constant-voltage regulation with ±0.5% accuracy. It supports NTC-based battery temperature monitoring via the TS pin and uses BATS pin for accurate battery voltage sensing to minimize IR-drop error.
Charging progression follows three distinct phases: preconditioning (trickle charge at 5–15% of ISET when VBAT < 5.0–5.4 V), constant-current mode (user-programmable 100–1000 mA), and constant-voltage mode (regulated at 8.4 V with termination at 5–15% of ISET). Fault protection includes over-voltage (8.8 V threshold), over-temperature shutdown (140°C), and open-circuit detection on TS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | 8.4 V ±0.5% - Factory-trimmed regulation point for dual-cell Li-ion/polymer batteries; ensures safe full-charge without overvoltage stress. |
| Max Charge Current | 1000 mA - Programmable via external RSET resistor; enables fast charging while maintaining thermal safety in compact portable devices. |
| Input Voltage Range | 4.0 V to 13.2 V - Supports both low-voltage USB (5 V) and high-voltage AC adapters (up to 13.2 V), eliminating need for external DC-DC pre-regulation. |
| Thermal Loop Threshold | 115°C entry / 85°C exit - Digitally adjusts charge current in real time to prevent thermal shutdown during high ΔVIN-BAT operation (e.g., 12 V adapter charging 8.4 V pack). |
| Battery Leakage | <0.4 µA - Minimizes self-discharge when charger is idle, critical for long-term storage in GPS or POS terminals. |
| Shutdown Current | <1 µA - Enables ultra-low power sleep mode after charge completion, preserving battery capacity in always-on portable systems. |
| Temp Sense Support | Any NTC thermistor - Configurable via TS pin; no fixed-value thermistor required, simplifying BOM for diverse battery pack designs. |
Pinout & Package
Package: 3 × 3 mm, 14-pin TDFN (TDFN33-14), thermally enhanced, rated for -40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input (active-high, internal pull-down) | Starts/stop charging sequence; must be pulled high to IN or driven externally to initiate operation after power-up or fault recovery. |
| CT | Charge timer programming | Connects to 0.1 µF capacitor to ground; sets timeout for trickle/CC/CV phases; direct GND connection disables timer. |
| ISET | Fast charge current programming | Resistor to ground sets constant-current level (100–1000 mA); voltage at pin is 2 V, enabling precise current scaling. |
| GND | Power and signal reference | Primary ground return path for all internal circuits and external components; must be low-impedance connection to system ground plane. |
| TS | Battery temperature sense input | Accepts voltage divider output from NTC thermistor; detects open-circuit fault and triggers thermal protection based on analog threshold. |
| BATS | Battery voltage sense input | Direct connection to battery positive terminal improves voltage regulation accuracy by compensating for PCB trace resistance. |
| BAT | Charge output | Drives battery anode through internal PMOS pass device; reverse-blocking prevents battery discharge back into IC during sleep. |
| IN (Pins 8,9) | Power supply input | Dual-pad configuration lowers thermal resistance and current density; accepts 4–13.2 V from USB or adapter with UVLO at 4 V. |
| STAT2 / STAT1 | Open-drain status outputs | Drive external LEDs directly (with series resistor to IN); encode charge state (preconditioning, CC, CV, complete, fault) via logic combinations. |
| ADPP# | Adapter present indicator | Open-drain output asserts low when valid input power is detected (VIN > VUVLO and VIN – VBAT > 50–100 mV), enabling system-level power-source awareness. |
| TERM | Charge termination current setting | Resistor to ground programs termination threshold (5–15% of ISET); open circuit defaults to 10% for automatic cutoff. |
| N/C | No connection | Pin 14 is unconnected internally; must remain floating or grounded per layout guidelines-no routing or component attachment. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Thermal Loop Control | Automatically scales charge current between 115°C (enter) and 85°C (exit) to sustain maximum safe charging rate without thermal shutdown. |
| Accurate Dual-Cell Regulation | 8.4 V ±0.5% end-of-charge voltage with <±0.1% drift over temperature, ensuring compliance with Li-ion cell manufacturer specifications. |
| Flexible Temperature Sensing | Supports any NTC thermistor (not limited to 10 kΩ), allowing design reuse across battery vendors without hardware changes. |
| Low-Leakage Sleep Mode | <0.4 µA BAT-pin leakage and <1 µA shutdown current extend shelf life and runtime in infrequently used portable equipment. |
| Robust Fault Protection | Integrated OV (8.8 V), OT (140°C shutdown), and TS open-circuit detection eliminate need for external supervision circuitry. |
Applications
| Digital Still Cameras | Global Positioning Systems (GPS) |
|---|---|
|
Use Scenario: Compact DSLR or mirrorless camera requiring rapid battery recharge between shoots using USB-C or wall adapter. IC Role / Device Role: Standalone linear charger managing dual-cell Li-ion pack (8.4 V), regulating voltage/current while monitoring temperature during high-current bursts. Use Value: Eliminates need for external DC-DC converter or discrete protection ICs; thermal loop maintains 1 A charge even during hot ambient operation. |
Use Scenario: Handheld GPS unit operating outdoors across wide temperature ranges (-20°C to 60°C) with intermittent solar/USB charging. IC Role / Device Role: Battery management interface between variable-input power source and dual-cell Li-ion pack, enforcing safe charge profiles and detecting thermal anomalies. Use Value: NTC-agnostic TS input allows use of cost-optimized thermistors; low 0.4 µA leakage preserves battery during weeks of standby. |
| Point Of Service (POS) Terminals | Two Way Radios |
|
Use Scenario: Retail POS terminal with hot-swappable battery packs charged via USB or 12 V adapter in continuous duty cycles. IC Role / Device Role: Primary charge controller enabling automatic recharge sequencing, end-of-charge termination, and ADPP#-driven power-source handoff. Use Value: ADPP# output signals host MCU when external power is connected, enabling seamless transition from battery to line power without brownout. |
Use Scenario: Tactical two-way radio deployed in field environments where battery packs are cycled frequently and exposed to mechanical shock. IC Role / Device Role: Integrated charger providing reverse-blocking, automatic trickle-to-fast charge progression, and over-temperature fault shutdown. Use Value: Built-in 140°C over-temperature shutdown protects battery and radio electronics during extended transmit duty cycles in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-cell Li-ion battery charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGTR | Switch-mode (buck) architecture; 4.5–16 V input; fixed 8.4 V CV; max 1.2 A CC; requires external MOSFET for reverse blocking. | Higher efficiency (>85%) in high ΔVIN-BAT scenarios (e.g., 12 V → 8.4 V), but larger solution size and higher EMI vs. linear AAT3663IWO-8.4-1-T1. | Select BQ24075RGTR when thermal budget is constrained and input voltage exceeds 9 V regularly; choose AAT3663IWO-8.4-1-T1 for minimal BOM, low noise, and space-constrained USB-powered designs. |
| MAX1555 | Linear charger; 4.25–6.5 V input only; single-cell 4.2 V only; no thermal loop; no TS pin; 500 mA max CC; 10-pin µMAX package. | Limited to low-voltage USB charging of single cells; lacks dual-cell support, temperature monitoring, and adaptive thermal management. | MAX1555 is not a functional substitute for AAT3663IWO-8.4-1-T1 in dual-cell or wide-input applications; consider only for legacy single-cell designs with strict footprint constraints. |
Compared with BQ24075RGTR and MAX1555, the AAT3663IWO-8.4-1-T1 uniquely combines dual-cell 8.4 V regulation, NTC-flexible temperature sensing, and dynamic digital thermal loop control in a 3×3 mm TDFN package-enabling robust, low-noise charging where switcher EMI or single-cell limitation is unacceptable.
Availability
AAT3663IWO-8.4-1-T1 is available at Aetrix Electronics and suitable for digital still cameras, GPS units, POS terminals, and two-way radios requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AAT3663IWO-8.4-1-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, with leadership in RF, power management, and precision timing products.
The AAT3663IWO-8.4-1-T1 belongs to Skyworks' BatteryManager™ family within its Total Power Management IC™ portfolio, engineered specifically for space-constrained, thermally sensitive portable electronics requiring reliable dual-cell Li-ion charging without external supervision.
FAQ
What battery chemistry and configuration does the AAT3663IWO-8.4-1-T1 support?
The AAT3663IWO-8.4-1-T1 is explicitly designed for dual-cell lithium-ion or lithium-polymer battery packs with a nominal voltage of 8.4 V and end-of-charge voltage of 8.4 V ±0.5%. It does not support single-cell (4.2 V), triple-cell, or non-Li-ion chemistries. The "-8.4-1" suffix confirms dual-cell configuration with universal NTC thermistor compatibility.
How is charge current programmed on the AAT3663IWO-8.4-1-T1?
Charge current is set using an external resistor (RSET) connected between the ISET pin and ground. For example, a 1.78 kΩ resistor programs 1000 mA, while 17.8 kΩ sets 100 mA. The relationship is linear and specified in the datasheet's Table 1; 1% metal-film resistors are recommended for accuracy. The AAT3663IWO-8.4-1-T1 does not support I²C or digital programming.
Does the AAT3663IWO-8.4-1-T1 include battery temperature monitoring?
Yes-the AAT3663IWO-8.4-1-T1 includes dedicated TS (temperature sense) and BATS (battery voltage sense) pins. The TS pin accepts voltage from an NTC thermistor divider and provides open-circuit detection. As a "-1" variant, it supports any NTC thermistor value-not just 10 kΩ-giving design flexibility across battery suppliers.
What protection features are integrated into the AAT3663IWO-8.4-1-T1?
The AAT3663IWO-8.4-1-T1 integrates over-voltage protection (8.8 V threshold), over-temperature shutdown (140°C), digital thermal loop regulation (115°C entry), TS open-circuit detection, and automatic fault shutdown on over-current or short-circuit. It also features reverse current blocking at the BAT pin to prevent battery discharge through the IC during sleep mode.
Can the AAT3663IWO-8.4-1-T1 operate from a standard USB port?
Yes-the AAT3663IWO-8.4-1-T1 supports input voltages from 4.0 V to 13.2 V, fully covering USB 2.0 (5 V) and USB 3.0 (5.25 V) specifications. Its low 4.0 V UVLO threshold allows reliable startup even with voltage drop across cables or connectors, making it suitable for USB-powered portable devices with dual-cell batteries.
AAT3663IWO-8.4-1-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- BatteryManager™
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current
- Fault Protection:
- Over Current, Over Temperature, Over Voltage, Short Circuit
- Charge Current - Max:
- 1A
- Battery Pack Voltage:
- 8.4V
- Voltage - Supply (Max):
- 13.2V
- Interface:
- USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TDFN (3x3)
AAT3663IWO-8.4-1-T1 FAQ
1.How can I place an order for AAT3663IWO-8.4-1-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT3663IWO-8.4-1-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 AAT3663IWO-8.4-1-T1 reliable?
The price and inventory of AAT3663IWO-8.4-1-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT3663IWO-8.4-1-T1 is usually 5 days.
3.What payment methods are accepted for AAT3663IWO-8.4-1-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT3663IWO-8.4-1-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT3663IWO-8.4-1-T1?
AAT3663IWO-8.4-1-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT3663IWO-8.4-1-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 AAT3663IWO-8.4-1-T1?
For technical support, including AAT3663IWO-8.4-1-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT3663IWO-8.4-1-T1 requirements.
6.How does Aetrix verify that AAT3663IWO-8.4-1-T1 is sourced from the original manufacturer or authorized distributors?
All AAT3663IWO-8.4-1-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 AAT3663IWO-8.4-1-T1 meets industry standards.
7.What is the process for return or replacement of AAT3663IWO-8.4-1-T1?
All AAT3663IWO-8.4-1-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT3663IWO-8.4-1-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 AAT3663IWO-8.4-1-T1 part is unused and in its original packaging.
Return procedure for AAT3663IWO-8.4-1-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AAT3663IWO-8.4-1-T1 Tags
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