LTC3879
PRODUCTIONFast, Wide Operating Range No RSENSE Step-Down Controller
- Part Models
- 8
- 1ku List Price
- Starting From $2.71
Overview
- Wide VIN Range: 4V to 38V
- ±1% 0.6V Voltage Reference
- Extremely Fast Transient Response
- tON(MIN): 43ns
- No RSENSE™ Valley Current Mode Control
- Stable with Low ESR Ceramic COUT
- Supports Smooth Start-Up in Pre-Biased Output
- Optimized for High Step-Down Ratios
- Adjustable Output Voltage Soft-Start or Tracking
- Power Good Output Voltage Monitor
- Dual N-Channel MOSFET Synchronous Drive
- Adjustable Switching Frequency
- Programmable Current Limit with Foldback
- Output Overvoltage Protection
- 16-Pin MSOP and 3mm × 3mm QFN Packages
The LTC3879 is a synchronous step-down switching regulator controller optimized for high switching frequency and fast transient response. The constant on-time valley current mode architecture allows for a wide input range, including very low duty factor operation. No external sense resistor or slope compensation is required. System flexibility is offered through a user-programmable soft-start pin and independent RUN pin. The voltage ramping soft-start function can be programmed with a capacitor or made to track an external reference source.
Operating frequency is set by an external resistor and compensated for variations in VIN to offer excellent line stability. Discontinuous mode operation provides high efficiency during light load conditions. A forced continuous control pin allows the user to reduce noise and RF interference. Safety features include output overvoltage protection and programmable current limit with foldback. The current limit is user programmable.
The LTC3879 allows operation from 4V to 38V at the input and from 0.6V to 90% VIN at the output. The LTC3879 is available in a small 16-pin thermally enhanced MSOP or 3mm × 3mm QFN packages.
Applications
- Distributed Power Systems
- Embedded Computing
- Communications Infrastructure
Documentation
Data Sheet 1
User Guide 2
Technical Articles 1
Product Selector Card 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 |
|---|---|---|---|
| LTC3879EMSE#PBF | 16-Lead MSOP w/ EP | ||
| LTC3879EMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LTC3879EUD#PBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3879EUD#TRPBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3879IMSE#PBF | 16-Lead MSOP w/ EP | ||
| LTC3879IMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LTC3879IUD#PBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3879IUD#TRPBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC3879EMSE#PBF | PRODUCTION | |
| LTC3879EMSE#TRPBF | PRODUCTION | |
| LTC3879EUD#PBF | PRODUCTION | |
| LTC3879EUD#TRPBF | PRODUCTION | |
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LTC3879EMSE#PBF | PRODUCTION | |
| LTC3879EMSE#TRPBF | PRODUCTION | |
| LTC3879IMSE#PBF | PRODUCTION | |
| LTC3879IMSE#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC3879EMSE#PBF | PRODUCTION | |
| LTC3879EMSE#TRPBF | PRODUCTION | |
| LTC3879IMSE#PBF | PRODUCTION | |
| LTC3879IMSE#TRPBF | PRODUCTION | |
|
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC3879IUD#PBF | PRODUCTION | |
| LTC3879IUD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3879
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.
