LTC3428
RECOMMENDED FOR NEW DESIGNS4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm × 3mm DFN
- Part Models
- 2
- 1ku List Price
- Starting From $5.90
Overview
- 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.
Applications
- Networking Equipment
- Handheld Instruments
- Digital Cameras
- Distributed Power
- Local 3.3V to 5V Conversion
Documentation
Data Sheet 1
User Guide 1
Design Note 2
Press Release 1
Brochure 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 |
|---|---|---|---|
| LTC3428EDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC3428EDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC3428EDD#PBF | PRODUCTION | |
| LTC3428EDD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LTC3428
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.
Evaluation Kits
LTC3428EDD | 2.4MHz, 2-Phase Boost Converter, VIN = 1.6V - 4.5V, VOUT = 3.3V/5V
Resources
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