LT3582 - Boost and Single Inductor Inverting DC/DC Converters with Optional I2C Programing and OTP
Features
- Output Voltages:
3.2V to 12.775V and –1.2V to –13.95V (LT3582)
5V and –5V (LT3582-5)
12V and –12V (LT3582-12) - Digitally Re-Programmable (LT3582) via I2C for:
Output Voltages
Power Sequencing
Output Voltage Ramp Rates
- Power-Up Defaults Settable with Non-Volatile OTP (LT3582)
- I2C Compatible Interface (Standard Mode*)
- All Power Switches Integrated
350mA Current Limit (Boost)
600mA Current Limit (Inverting) - All Feedback Resistors Integrated
- Input Voltage Range: 2.55V to 5.5V
- Low Quiescent Current
325μA in Active Mode
0.01μA in Shutdown Mode - Integrated Output Disconnect
- Tiny 16-Pin 3mm × 3mm QFN Package
Typical Application
Description
The LT3582/LT3582-5/LT3582-12 are dual DC/DC converters featuring positive and negative outputs and integrated feedback resistors. The LT3582, with its built-in One Time Programming (OTP), has configurable output settings via the I2C interface, including output voltage settings, power-up sequencing, power-down discharge, and output voltage ramp rates. LT3582 settings can be changed adaptively in the final product, or set during manufacturing and made permanent using the built in non-volatile OTP memory. The positive output voltage can be set between 3.2V and 12.775V in 25mV steps. The negative output voltage can be set between –1.2V and –13.95V in –50mV steps. The LT3582-5 and LT3582-12 are pre-configured at the factory for ±5V and ±12V outputs respectively, and as such, don’t require the use of the I2C interface.
The LT3582 series includes two monolithic converters, one Boost and one Inverting. The Boost converter has an integrated power switch and output disconnect switch. The Inverting converter uses a single inductor topology and includes an integrated power switch. Both Boost and Inverting converters use a novel** control scheme resulting in low output voltage ripple while allowing for high conversion efficiency over a wide load current range. The LT3582 series is available in a 16-pin 3mm × 3mm QFN.
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 |
|---|---|---|---|---|---|
| LT3582EUD-12#PBF | 3x3 QFN-16 | UD | E | 05-08-1691 | Yes |
| LT3582EUD-12#TRPBF | 3x3 QFN-16 | UD | E | 05-08-1691 | Yes |
| LT3582EUD-5#PBF | 3x3 QFN-16 | UD | E | 05-08-1691 | Yes |
| LT3582EUD-5#TRPBF | 3x3 QFN-16 | UD | E | 05-08-1691 | Yes |
| LT3582EUD#PBF | 3x3 QFN-16 | UD | E | 05-08-1691 | Yes |
| LT3582EUD#TRPBF | 3x3 QFN-16 | UD | E | 05-08-1691 | 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 | |
|---|---|---|---|---|---|---|
| LT3582EUD-12#PBF | 3x3 QFN-16 | E | $3.22 | $2.25 | Yes | |
| LT3582EUD-12#TRPBF | 3x3 QFN-16 | E | $3.28 | $2.31 | Yes | |
| LT3582EUD-5#PBF | 3x3 QFN-16 | E | $3.22 | $2.25 | Yes | |
| LT3582EUD-5#TRPBF | 3x3 QFN-16 | E | $3.28 | $2.31 | Yes | |
| LT3582EUD#PBF | 3x3 QFN-16 | E | $3.22 | $2.25 | Yes | |
| LT3582EUD#TRPBF | 3x3 QFN-16 | E | $3.28 | $2.31 | 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 |
|---|---|---|---|
| DC1247A | LT3582EUD Demo Board | 2.7V-5.5Vin, Programmable Vout Boost and Inverting DC/DC Converters with OTP (Req DC590) | $125.00 | |
| 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
- AMOLED Power
- CCD Power
- General Purpose DC/DC Conversion
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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.
