AAT3166

High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications

Please note: this product is being discontinued and is not recommended for new designs.

The AAT3166 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. The AAT3166 is capable of driving four LEDs for a total of 108mA from a 2.7V to 5.5V input. The current sinks may be operated individually or in parallel for driving higher current LEDs. A low external parts count (two 1µF flying capacitors and two small 1µF capacitors at V_IN and V_OUT) make this part ideally suited for small battery-powered applications.

AnalogicTech's AS²Cwire™ (Advanced Simple Serial Control™) serial digital input is used to enable, disable, and set current for each LED with a 16-level logarithmic scale plus four low-current settings down to 115µA. For optimized efficiency, low-current mode settings require only 50µA of housekeeping current.

Each output of the AAT3166 is equipped with built-in protection for V_OUT short-circuit and auto-disable for load short-circuit conditions. Built-in soft-start circuitry prevents excessive inrush current during start-up. A low-current shutdown feature disconnects the load from V_IN and reduces quiescent current to less than 1µA.

The AAT3166 is available in a Pb-free, space-saving, 3x3mm 12-pin TDFN package and is rated over the -40°C to +85°C temperature range.

Please note: AAT3166 is not recommended for new designs.

Data Sheets Receive a sample

Talk to Sales ECAD Model

Specifications

Number of LEDs4

LED Channels4

LED(s) per/Ch1

Min. V_IN (V)2.7

Max. V_IN (V)5.5

InterfaceS²Cwire™

Typ. I_Q (μA)50

Peak Efficiency94%

Current Accuracy (%)±10%

Current Matching (%)±0.5%

Max. I_OUT per/Ch (mA)27

PackageTDFN, 12L

Package (mm)3 x 3 x 0.75

PackageTDFN33-12

Features

V_IN Range: 2.7V to 5.5V
Fully Programmable Current with Single Wire
16-Step Logarithmic Scale
14/18/27mA Max Current
Four Low Current Settings Down to 115µA
Low I_Q (50µA) for Single-Channel, Low-Current Mode
Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and V_F Coverage
Drives up to Four LEDs
Individual Main-Sub (3-1) Group Control
No Inductors, Low Noise Operation
1MHz Constant Switching Frequency
Small Application Circuit
Built-In Thermal Protection
Built-In Auto-Disable for Open Circuit
Automatic Soft Start
I_Q <1µA in Shutdown
TDFN33-12 Package

Find Your Sales Representative and Distributor
Consult with your Skyworks sales representative or distributor to find the best solution for your design.

Request a Quote
Get a quote for the specific products and quantities you need.

Working with Skyworks
Learn more about our purchase process to navigate quickly and efficiently

Support and Resources
Explore Skyworks support options, consult with our global sales and channel partners, and get the resources and expert guidance and custom development services you need to help you with your next innovation.

Technical Documents
Explore application notes, block diagrams, data sheets, user guides, ADS model calculators, installation references, S parameters and more.

Product Lifecycle Status Lookup
Lookup the product lifecycle status of Skyworks part number

Certificate of Conformance
Look up a product’s Certificate of Conformance for information such as REACH, RoHS, IEC 624741 and more.

Engineer examining electrical components

Previously Visited Products

New and Featured Products

Previously Visited Applications

New and Featured Applications