LTC3101 - Wide VIN, Multi-Output DC/DC Converter and PowerPath Controller
Features
- Low Loss PowerPath™ Control: Seamless, Automatic Transition from Battery to USB or Wall Adapter Power
- Wide VIN Range: 1.8V to 5.5V
- Buck-Boost VOUT: 1.5V to 5.25V
- Buck-Boost Generates 3.3V at 300mA for VIN ≥ 1.8V, 3.3V at 800mA for VIN ≥ 3V
- Dual 350mA Buck Regulators, VOUT: 0.6V to VIN
- 38μA Quiescent Current in Burst Mode® Operation
- 1.8V, 50mA Always-On LDO
- Protected 100mA Hot Swap™ Output
- Pushbutton On/Off Control
- Current Limited 200mA MAX Output
- Programmable Power-Up Sequencing
- 24-lead 4mm × 4mm × 0.75mm QFN Package
Typical Application
Description
The LTC3101 is a complete power management solution for low power portable devices. It provides three high efficiency switching DC/DC converters which seamlessly transition from battery to USB/wall adapter power when available. A synchronous buck-boost regulator provides complete flexibility, allowing operation from a single Li-Ion/Polymer battery, 2 to 3 AA cells, a USB port or any other power source operating from 1.8V to 5.5V.
Two always-alive outputs, a 50mA LDO and a 200mA MAX output that tracks the higher voltage input supply, provide power for critical functions or additional external regulators. Flash memory cards can be directly powered from the protected 100mA Hot Swap output. Pushbutton control logic and a programmable-duration microprocessor reset generator simplify interfacing to a microprocessor while internal sequencing and independent enable pins provide flexible power-up options. The LTC3101 is available in a low profile (0.75mm) 24-lead 4mm × 4mm 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 |
|---|---|---|---|---|---|
| LTC3101EUF#PBF | 4x4 QFN-24 | UF | E | 05-08-1697 | Yes |
| LTC3101EUF#TRPBF | 4x4 QFN-24 | UF | E | 05-08-1697 | 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 | |
|---|---|---|---|---|---|---|
| LTC3101EUF#PBF | 4x4 QFN-24 | E | $5.64 | $3.95 | Yes | |
| LTC3101EUF#TRPBF | 4x4 QFN-24 | E | $4.01 | 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 |
|---|---|---|---|
| DC1443A | LTC3101EUF Demo Board | 2-Cell, Multi-Output DC/DC Converter and PowerPath Manager | $100.00 | |
| Buy Now | |||
Applications
- Ultra-Portable Digital Video Cameras
- Personal Handheld GPS Navigators
- Portable Medical Instruments
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LTC3101
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.
