Features and Benefits
- High Efficiency: Up to 92%
- 2-Phase Control Reduces Output Voltage Ripple
- 5V at 2A from 3.3V Input
- 3.3V at 1.5A from 1.8V Input
- 1.6V to 5.25V Adjustable Output Voltage
- 1.6V to 4.5V Input Range
- Internal Soft-Start Operation
- Low Shutdown Current: <1µA
- Uses Small Surface Mount Components
- 10-Pin 3mm × 3mm DFN Package
The LTC3428 is a 2-phase, current mode boost converter, capable of supplying 2A at 5V from a 3.3V input. Two 93mΩ, 2A N-channel MOSFET switches allow the LTC3428 to deliver high efficiency from input voltages as low as 1.6V.
External parts count and size are minimized by a 1MHz switching frequency and a 2-phase design. Two phase operation significantly reduces peak inductor currents and capacitor ripple current, doubling the effective switching frequency and minimizing inductor and capacitor size. External compensation allows the feedback loop response to be optimized for a particular application.
Other features include: an active low shutdown pin reduces supply current to below 1µA, internal soft-start, antiringing control and thermal shutdown. The LTC3428 is available in a low profile (0.75mm) 10-lead (3mm × 3mm) DFN package.
- Networking Equipment
- Handheld Instruments
- Digital Cameras
- Distributed Power
- Local 3.3V to 5V Conversion
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Demonstration circuit 700 is a 2.4MHz, Dual Phase Step-Up DC/DC Converter featuring the LTC3428EDD. The demo board demonstrates a dual phase DC/DC boost converter, with a 2A switch (per phase), capable of providing either 5V at 2A or 3.3V at 1.5A. The circuit demonstrates the advantages of the dual phase architecture for an effective switching frequency of 2.4MHz.
Documentation & Resources
R415 Reliability Data3/23/201825 K
DC700A - Demo Manual9/24/2009413K
Tools & Simulations
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.
Models for the following parts are available in LTspice:
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 Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC3428EDD#PBF||Material Declaration||Reliability Data||10-Lead DFN (3mm x 3mm w/ EP)|
|LTC3428EDD#TRPBF||Material Declaration||Reliability Data||10-Lead DFN (3mm x 3mm w/ EP)|
|Wafer Fabrication Data||R415 Reliability Data|
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.