LTC3576/LTC3576-1 - Switching Power Manager with USB On-the-Go + Triple Step-Down DC/DCs
Features
- Bidirectional Switching Regulator with Bat- Track™ Adaptive Output Control Provides Efficient Charging and a 5V Output for USB On-The-Go
- Bat-Track Control of External High Voltage Step-Down Switching Regulator
- Overvoltage Protection Guards Against Damage
- “Instant-On” Operation with Discharged Battery
- Triple Step-Down Switching Regulators with I2C Adjustable Outputs (1A/400mA/400mA IOUT)
- 180mΩ Internal Ideal Diode + External Ideal Diode Controller Powers the Load in Battery Mode
- Li-Ion/Polymer Battery Charger (1.5A Max ICHG)
- Battery Float Voltage: 4.2V (LTC3576), 4.1V (LTC3576-1)
- Compact (4mm × 6mm × 0.75mm) 38-pin QFN Package
Typical Application
Description
The LTC3576/LTC3576-1 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They each include a high efficiency, bidirectional switching PowerPath™ manager with automatic load prioritization, a battery charger, an ideal diode, a controller for an external high voltage switching regulator and three general purpose step-down switching regulators with I2C adjustable output voltages. The internal switching regulators automatically limit input current for USB compatibility and can also generate 5V at 500mA for USB on-the-go applications when powered from the battery. Both the USB and external switching regulator power paths feature Bat-Track optimized charging to provide maximum power to the application from supplies as high as 38V. An overvoltage circuit protects the LTC3576/LTC3576-1 from damage due to high voltage on the VBUS or WALL pins with just two external components. The LTC3576/LTC3576-1 are available in a low profile 38-pin (4mm × 6mm × 0.75mm) QFN package.Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC3576EUFE-1#PBF | 4x6 QFN-38 | UFE | E | 05-08-1750 | Yes |
| LTC3576EUFE-1#TRPBF | 4x6 QFN-38 | UFE | E | 05-08-1750 | Yes |
| LTC3576EUFE#PBF | 4x6 QFN-38 | UFE | E | 05-08-1750 | Yes |
| LTC3576EUFE#TRPBF | 4x6 QFN-38 | UFE | E | 05-08-1750 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3576EUFE-1#PBF | 4x6 QFN-38 | E | $6.86 | $4.80 | Yes | |
| LTC3576EUFE-1#TRPBF | 4x6 QFN-38 | E | $4.86 | Yes | ||
| LTC3576EUFE#PBF | 4x6 QFN-38 | E | $6.86 | $4.80 | Yes | |
| LTC3576EUFE#TRPBF | 4x6 QFN-38 | E | $4.86 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1334A | LTC3576EUFE Demo Board | Switching Power Manager with USB On-the-Go, Triple Step-Down DC/DC (1A, 0.4A, 0.4A) | $200.00 | |
| DC1577A | LTC3576EUFE-1 Demo Board | Switching Power Manager with USB On-the-Go, Triple Step-Down DC/DC (1A, 0.4A, 0.4A) | $200.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC590B | Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards | $50.00 | |
| Buy Now | |||
Applications
- HDD-Based Media Players
- GPS, PDAs, Digital Cameras, Smart Phones
- Automotive Compatible Portable Electronics
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Product Notifications
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
