LTC3371
RECOMMENDED FOR NEW DESIGNS4-Channel 8A Configurable Buck DC/DCs with Watchdog and Power-On Reset
- Part Models
- 12
- 1ku List Price
- Starting From $6.26
Overview
- 8 × 1A Buck Power Stages Configurable as 2, 3 or 4 Output Channels
- 8 Unique Output Configurations (1A to 4A Per Channel)
- Independent VIN Supplies for Each DC/DC (2.25V to 5.5V)
- Low Total No Load Supply Current:
- 15μA In Shutdown (All Channels Off)
- 68μA One Channel Active in Burst Mode® Operation
- 18μA Per Additional Channel
- Precision Enable Pin Thresholds for Autonomous Sequencing
- 1MHz to 3MHz RT Programmable Frequency (2MHz Default) or PLL Synchronization
- Temp Monitor Indicates Die Temperature
- CT Programmed Watchdog Timer
- Independent RST Pins Indicate Buck in Regulation
- Thermally Enhanced 38-Lead 5mm × 7mm QFN and TSSOP Packages
The LTC3371 is a highly flexible multi-output power supply IC. The device includes four synchronous buck converters, configured to share eight 1A power stages, each of which is powered from independent 2.25V to 5.5V inputs.
The DC/DCs are assigned to one of eight possible power configurations via pin programmable C1-C3 pins. 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 for Burst Mode or forced continuous mode operation.
The CT pin programs the timing parameters of four independent RST pins as well as the watchdog timer.
To reduce input noise, the buck converters are phased in 90° steps. Precision enable pin thresholds facilitate reliable power sequencing. The LTC3371 is available in low profile 38-lead 5mm × 7mm QFN and TSSOP packages.
Applications
- General Purpose Multichannel Power Supplies: Automotive, Industrial, Distributed Power Systems
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 |
|---|---|---|---|
| LTC3371EFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3371EFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3371EUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3371EUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3371HFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3371HFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3371HUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3371HUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3371IFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3371IFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3371IUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3371IUHF#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 |
||
| LTC3371EFE#PBF | PRODUCTION | |
| LTC3371EFE#TRPBF | PRODUCTION | |
| LTC3371HFE#PBF | PRODUCTION | |
| LTC3371HFE#TRPBF | PRODUCTION | |
| LTC3371IFE#PBF | PRODUCTION | |
| LTC3371IFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LTC3371EFE#PBF | PRODUCTION | |
| LTC3371EFE#TRPBF | PRODUCTION | |
| LTC3371HFE#PBF | PRODUCTION | |
| LTC3371HFE#TRPBF | PRODUCTION | |
| LTC3371IFE#PBF | PRODUCTION | |
| LTC3371IFE#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 |
|---|---|---|
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2975 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC3370 | RECOMMENDED FOR NEW DESIGNS | 4-Channel 8A Configurable Buck DC/DCs |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3371
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
LTC3371EFE Demo Board | 4-Ch 8A Configurable Bucks with Watchdog/Power-On Reset, 2.25V ≤ VIN ≤ 5.5V, VOUT1-4 = 1.2V, 1.8V, 2.5V, 3.3V@2A Each
Resources
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