LTC3425
RECOMMENDED FOR NEW DESIGNS5A, 8MHz, 4-Phase Synchronous Step-Up DC/DC Converter
- Part Models
- 2
- 1ku List Price
- Starting From $7.35
Overview
- High Efficiency: Up to 95%
- Up to 3A Continuous Output Current
- 4-Phase Operation for Low Output Ripple and Tiny Solution Size
- Output Disconnect and Inrush Current Limiting
- Very Low Quiescent Current: 12µA
- 0.5V to 4.5V Input Range
- 2.4V to 5.25V Adjustable Output Voltage
- Adjustable Current Limit
- Adjustable, Fixed Frequency Operation from 100kHz to 2MHz per Phase
- Synchronizable Oscillator with Sync Output
- Internal Synchronous Rectifiers
- Manual or Automatic Burst Mode® Operation
- Power Good Comparator
- <1µA Shutdown Current
- Antiringing Control
- 5mm x 5mm Thermally Enhanced QFN Package
The LTC3425 is a synchronous, 4-phase boost converter with output disconnect capable of operation below 1V input. It includes four N-channel MOSFET switches and four P-channel synchronous rectifiers for an effective RDS(ON) of 0.045Ω and 0.05Ω, respectively. 4-phase operation greatly reduces peak inductor currents, and capacitor ripple current, and increases effective switching frequency, minimizing inductor and capacitor sizes. True output disconnect eliminates inrush current and allows zero load current in shutdown. External Schottky diodes are not required in most applications (VOUT < 4.3V). Power saving Burst Mode operation can be user controlled or left in automatic mode.
Other features include 1µA shutdown current, programmable frequency with sync in and out, programmable soft-start, antiringing control, thermal shutdown, adjustable current limit, reference output and power good comparator.
The LTC3425 is available in a small, thermally enhanced 32-pin QFN package.
Applications
- Handheld Computers
- Point-of-Load Regulators
- 3.3V to 5V Conversion
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 |
|---|---|---|---|
| LTC3425EUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC3425EUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC3425EUH#PBF | PRODUCTION | |
| LTC3425EUH#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3425
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.
