LTC3539
LTC3539-2
RECOMMENDED FOR NEW DESIGNS
2A, 1MHz/2MHz Synchronous Step-Up DC/DC Converters
- Part Models
- 4
- 1ku List Price
- Starting From $3.81
Overview
- Delivers 3.3V at 900mA From 2 Alkaline/NiMH Cells
- Delivers 5V at 900mA From a Lithium-Polymer Battery
- VIN Start-Up Voltage: 700mV
- 1.5V to 5.25V VOUT Range
- Up to 94% Efficiency
- VIN > VOUT Operation
- ±1.5% Feedback Voltage Tolerance
- 1MHz (LTC3539) or 2MHz (LTC3539-2) Fixed Frequency Operation
- Output Disconnect
- Selectable Burst Mode® or PWM Operation
- 10μA Quiescent Current
- Logic Controlled Shutdown: <1μA
- Requires Only 6 External Components
- Low Profile (2mm × 3mm × 0.75mm) DFN Package
The LTC3539/LTC3539-2 are synchronous, 2A step-up DC/DC converters with output disconnect. Synchronous rectification enables high efficiency in the low profile 2mm × 3mm DFN package. Battery life is extended with a 700mV start-up voltage and operation down to 500mV once started.
A switching frequency of 1MHz (LTC3539) or 2MHz (LTC3539-2) 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 LTC3539/LTC3539-2 feature a pin-enabled automatic Burst Mode operation at light load conditions. Anti-ring circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1μA and thermal overload protection.
The LTC3539/LTC3539-2 are offered in a 2mm × 3mm × 0.75mm DFN package.
Applications
- Medical Instruments
- Portable Bar Code Scanners
- Noise Canceling Headphones
- Portable GPS Navigation
- Handheld PCs
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3539EDCB#TRMPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC3539EDCB#TRPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC3539EDCB-2#TRMPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC3539EDCB-2#TRPBF | 8-Lead DFN (2mm x 3mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3539
- LTC3539-2
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
