LTC3535 - Dual Channel 550mA 1MHz Synchronous Step-Up DC/DC Converter
Features
- Two Independent Step-Up Converters
- Each Channel Delivers 3.3V at 100mA from a Single Alkaline/NiMH Cell or 3.3V at 200mA from Two Cells
- VIN Start-Up Voltage: 680mV
- 1.5V to 5.25V VOUT Range
- Up to 94% Efficiency
- Output Disconnect
- 1MHz Fixed Frequency Operation
- VIN > VOUT Operation
- Integrated Soft-Start
- Current Mode Control with Internal Compensation
- Burst Mode® Operation with 9μA IQ Each Channel
- Internal Synchronous Rectifier
- Logic Controlled Shutdown (IQ < 1μA)
- Anti-Ring Control
- Low Profile (3mm × 3mm × 0.75mm) 12-Lead DFN Package
Typical Application
Description
The LTC®3535 is a dual channel, synchronous, fixed frequency step-up DC/DC converter with output disconnect. Extended battery life in single AA/AAA powered products is realized with a 680mV start-up voltage and operation down to 500mV once started.
A switching frequency of 1MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. The LTC3535 features Burst Mode operation at light load conditions allowing it to maintain high efficiency over a wide range of load. Anti-ring circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1μA and thermal shutdown.
The LTC3535 is housed in a 3mm × 3mm × 0.75mm DFN 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 |
|---|---|---|---|---|---|
| LTC3535EDD#PBF | 3x3 DFN-12 | DD | E | 05-08-1725 | Yes |
| LTC3535EDD#TRPBF | 3x3 DFN-12 | DD | E | 05-08-1725 | 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 | |
|---|---|---|---|---|---|---|
| LTC3535EDD#PBF | 3x3 DFN-12 | E | $4.22 | $2.95 | Yes | |
| LTC3535EDD#TRPBF | 3x3 DFN-12 | E | $3.01 | 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 |
|---|---|---|---|
| DC1483A | LTC3535EDD Demo Board | Dual Channel 550mA 1MHz Synchronous Step-Up DC/DC Converter | $75.00 | |
| Buy Now | |||
Applications
- Medical Instruments
- Noise Canceling Headphones
- Energy Harvesting
- Bluetooth Headsets
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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
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Models for the following parts are available in LTspice:
LTC3535
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.
