LTC3459 - 10V Micropower Synchronous Boost Converter in ThinSOT
Features
- Small Solution Size
- >85% Efficiency over Wide Load Range
- Internal Synchronous Rectifier
- VIN Range: 1.5V to 5.5V
- 5V at 30mA from 3.3V Input
- 3.3V at 20mA from 2 AA Cell Input
- Programmable Output Voltages Up to 10V
- Burst Mode Operation
- Inrush Current Limiting
- Output Disconnect in Shutdown
- Ultralow Quiescent (10µA) and Shutdown (<1µA) Currents
- Low Profile 2mm × 2mm DFN, 2mm × 3mm DFN or SOT-23 Package
Typical Application
Description
The LTC3459 is a low current, high efficiency synchronous boost converter intended for low power, size constrained portable applications. The LTC3459 can be powered from a single lithium ion battery, a 2- to 3-cell stack of Alkaline or Nickel batteries, or any low impedance voltage source between 1.5V and 5.5V. The output is programmable via an external divider between 2.5V and 10V. Although the part is primarily intended for boost applications, VOUT will maintain regulation below VIN (at reduced efficiency).
The LTC3459 offers Burst Mode operation with a fixed peak current, providing high conversion efficiency over a wide range of load currents. During start-up, inductor current is controlled preventing the inrush surge current found in many boost converters. In shutdown the output is disconnected from the input and quiescent current is reduced to <1µA.
The LTC3459 is offered in low profile 6-pin 2mm × 2mm DFN, 2mm × 3mm DFN or SOT-23 (ThinSOT) packages, allowing a tiny footprint for the total solution.
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 |
|---|---|---|---|---|---|
| LTC3459EDC#PBF | 2x2 DFN-6 | DC6 | E | 05-08-1703 | Yes |
| LTC3459EDC#TRMPBF | 2x2 DFN-6 | DC6 | E | 05-08-1703 | Yes |
| LTC3459EDC#TRPBF | 2x2 DFN-6 | DC6 | E | 05-08-1703 | Yes |
| LTC3459EDCB#PBF | 2x2 DFN-6 | DC6 | E | 05-08-1703 | Yes |
| LTC3459EDCB#TRMPBF | 2x2 DFN-6 | DC6 | E | 05-08-1703 | Yes |
| LTC3459EDCB#TRPBF | 2x2 DFN-6 | DC6 | E | 05-08-1703 | Yes |
| LTC3459ES6#TRMPBF | SOT-23 | S6 | E | 05-08-1636 | Yes |
| LTC3459ES6#TRPBF | SOT-23 | S6 | E | 05-08-1636 | 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 | |
|---|---|---|---|---|---|---|
| LTC3459EDC#PBF | 2x2 DFN-6 | E | $2.87 | Yes | ||
| LTC3459EDC#TRMPBF | 2x2 DFN-6 | E | $2.87 | $2.06 | Yes | |
| LTC3459EDC#TRPBF | 2x2 DFN-6 | E | $2.87 | $2.01 | Yes | |
| LTC3459EDCB#PBF | 2x2 DFN-6 | E | $2.87 | Yes | ||
| LTC3459EDCB#TRMPBF | 2x2 DFN-6 | E | $2.87 | $2.06 | Yes | |
| LTC3459EDCB#TRPBF | 2x2 DFN-6 | E | $2.87 | $2.01 | Yes | |
| LTC3459ES6#TRMPBF | SOT-23 | E | $2.84 | $2.03 | Yes | |
| LTC3459ES6#TRPBF | SOT-23 | E | $2.84 | $2.01 | 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 |
|---|---|---|---|
| DC2042A | ENERGY HARVESTING (EH) MULTI-SOURCE DEMOBOARD | $200.00 | |
| DC2080A | Energy Harvesting (EH) Multi-Source Demo Board with Transducers | Contact Factory | |
| DC703A | LTC3459ES6 Demo Board | Vin = 1.8V to 5.5V, Vout = 8V @ 2mA / 20mA / 40mA | $75.00 | |
| Buy Now | |||
Applications
- General Purpose Micropower Boost
- Digital Cameras
- PDAs
- LCD Bias
- Small OLED Displays
- Supercap Charging
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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:
LTC3459
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.
