LTC3374
PRODUCTION8-Channel Parallelable 1A Buck DC/DCs
- Part Models
- 12
- 1ku List Price
- Starting From $7.01
Overview
- 8-Channel Independent Step-Down DC/DCs
- Master-Slave Configurable for Up to 4A per Output Rail with a Single Inductor
- Independent VIN Supplies for Each DC/DC (2.25V to 5.5V)
- All DC/DCs Have 0.8V to VIN Output Range
- Precision Enable Pin Thresholds for Autonomous Sequencing
- 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default)
- Die Temperature Monitor Output
- Thermally Enhanced 38-Lead QFN (5mm × 7mm) and TSSOP Packages
The LTC3374 is a high efficiency multioutput power supply IC. The DC/DCs consist of eight synchronous buck converters (1A each) all powered from independent 2.25V to 5.5V input supplies.
The DC/DCs may be used independently or in parallel to achieve higher currents of up to 4A per output with a shared inductor. The common buck switching frequency may be programmed with an external resistor, synchronized to an external oscillator, or set to a default internal 2MHz clock. The operating mode for all DC/DCs may be programmed via the MODE pin.
To reduce input noise the buck converters are phased in 90° steps. Precision enable pin thresholds provide reliable power-up sequencing. The LTC3374 is available in a compact 38-lead 5mm × 7mm QFN package as well as a 38-lead TSSOP package.
| NOTES | |
| LTC3374 | |
| LTC3374A | Higher efficiency, improved output voltage accuracy and an added overvoltage (OV) indicator |
Applications
- General Purpose Multichannel Power Supplies
- Industrial/Automotive/Communications
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LTC3374EFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3374EFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3374EUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3374EUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3374HFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3374HFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3374HUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3374HUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3374IFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3374IFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3374IUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3374IUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LTC3374EFE#PBF | PRODUCTION | |
| LTC3374EFE#TRPBF | PRODUCTION | |
| LTC3374HFE#PBF | PRODUCTION | |
| LTC3374HFE#TRPBF | PRODUCTION | |
| LTC3374IFE#PBF | PRODUCTION | |
| LTC3374IFE#TRPBF | PRODUCTION | |
|
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC3374EFE#PBF | PRODUCTION | |
| LTC3374EFE#TRPBF | PRODUCTION | |
| LTC3374EUHF#PBF | PRODUCTION | |
| LTC3374EUHF#TRPBF | PRODUCTION | |
| LTC3374HUHF#PBF | PRODUCTION | |
| LTC3374HUHF#TRPBF | PRODUCTION | |
| LTC3374IFE#PBF | PRODUCTION | |
| LTC3374IFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LTC3374EFE#PBF | PRODUCTION | |
| LTC3374EFE#TRPBF | PRODUCTION | |
| LTC3374HFE#PBF | PRODUCTION | |
| LTC3374HFE#TRPBF | PRODUCTION | |
| LTC3374IFE#PBF | PRODUCTION | |
| LTC3374IFE#TRPBF | PRODUCTION | |
|
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC3374IUHF#PBF | PRODUCTION | |
| LTC3374IUHF#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC4370 | RECOMMENDED FOR NEW DESIGNS | Two-Supply Diode-OR Current Balancing Controller |
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2977 | RECOMMENDED FOR NEW DESIGNS | 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3374
- LTC3374A
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
LTC3374EUHF Demo Board 8-Channel Parallelable 1A Buck DC/DC