LTC3867
RECOMMENDED FOR NEW DESIGNSSynchronous Step-Down DC/DC Controller with Differential Remote Sense and Nonlinear Control
- Part Models
- 4
- 1ku List Price
- Starting From $4.04
Overview
- VIN Range: 4V to 38V
- VOUT Range: 0.6V to 14V
- Nonlinear Control Architecture Minimizes Output Transient Excursions (Optional)
- Programmable DCR Temperature Compensation
- ±0.75% 0.6V Voltage Reference
- Fixed Frequency Range of 200kHz to 1.2MHz
- PLL Frequency Synchronization
- RSENSE or DCR Current Sensing
- Differential Remote Output Voltage Sense
- Supports Smooth Start-Up into Pre-Biased Outputs
- Programmable Soft-Start or VOUT Tracking
- Hiccup Mode/Soft Recovery from Output Overcurrent
- 24-Lead (4mm × 4mm) QFN Package
The LTC3867 is a current mode synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages. Output voltage transient excursions are minimized by use of a nonlinear control architecture to eliminate clock latency issues.
The maximum current sense voltage is programmable from 30mV to 75mV, allowing the use of either a discrete sense resistor or the inductor DCR as the sensing element. Programmable DCR temperature compensation allows constant current limit regardless of inductor temperature. Programmable inductor temperature-based thermal shutdown protects the power components from thermal stress. Soft recovery from output shorts or overcurrent minimizes output overshoot.
The LTC3867 features a precision 0.6V reference and can regulate output voltages up to 14V from a wide 4V to 38V input supply range. The LTC3867 includes a high speed differential remote sense amplifier. Burst Mode® operation, continuous and pulse-skipping modes are supported. The LTC3867 is available in a 24-lead (4mm × 4mm) QFN package.
Applications
- Automotive Systems
- Telecom Systems
- Industrial Equipment
- Distributed DC Power Systems
Documentation
Data Sheet 1
User Guide 2
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 |
|---|---|---|---|
| LTC3867EUF#PBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3867EUF#TRPBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3867IUF#PBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3867IUF#TRPBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC3867EUF#PBF | PRODUCTION | |
| LTC3867EUF#TRPBF | PRODUCTION | |
| LTC3867IUF#PBF | PRODUCTION | |
| LTC3867IUF#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
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3867
LTpowerCAD 4
- LTC3867 Project - Synchronous Step-Down Switching Supply with Inductor DCR Current Sensing (4.5-14V to 1.5V @ 15A)
- LTC3867 Project - Synchronous Step-Down Switching Supply with Rsense Current Sensing (18-36V to 12V @ 12A)
- LTC3867 Project - Synchronous Step-Down Switching Supply with Inductor DCR Current Sensing (18-36V to 12V @ 12A)
- LTC3867 Project - Synchronous Step-Down Switching Supply with Rsense Current Sensing (4.5-14V to 1.5V @ 15A)
Design tools for the following parts are available in LTpowerCAD:
- LTC3867
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.
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Evaluation Kits
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