Overview
Features and Benefits
- Wide Operating VIN Range: Up to 60V
- Rugged Architecture Tolerant of 80V VIN Transients
- Powerful 1.85Ω Driver Pull-Down (with 6V Supply)
- Powerful 1.1A Peak Current Driver Pull-Up (with 6V Supply)
- 7ns Fall Time Driving 1000pF Load
- 10ns Rise Time Driving 1000pF Load
- Drives Standard Threshold MOSFETs
- TTL/CMOS Compatible Inputs with Hysteresis
- Input Thresholds are Independent of Supply
- Undervoltage Lockout
- Low Profile (1mm) SOT-23 (ThinSOT™) and Thermally Enhanced 8-Pin MSOP Packages
Product Details
The LTC4440-5 is a high frequency high side N-channel MOSFET gate driver that is designed to operate in applications with VIN voltages up to 60V. The LTC4440-5 can also withstand and continue to function during 80V VIN transients. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitances. The LTC4440-5’s pull-up has a peak output current of 1.1A and its pull-down has an output impedance of 1.85Ω.
The LTC4440-5 features supply independent TTL/CMOS compatible input thresholds with 350mV of hysteresis. The input logic signal is internally level-shifted to the bootstrapped supply, which may function at up to 95V above ground.
The LTC4440-5 is optimized for driving (5V) logic level FETs and contains an undervoltage lockout circuit that disables the external MOSFET when activated.
The LTC4440-5 is available in the low profile (1mm) SOT-23 or a thermally enhanced 8-lead MSOP package.
Parameter |
LTC4440-5 | LTC4440A-5 | LTC4440 |
| Max Operating TS | 60V | 80V | 80V |
| Abssolute Max TS | 80V | 100V | 100V |
| MOSFET Gate Drive | 4V to 15V | 4V to 15V | 8V to 15V |
| VCC UV+ | 3.2V | 3.2V | 6.3V |
| VCC UV- | 3.04V | 3.04V | 6.0V |
Applications
- Telecommunications Power Systems
- Distributed Power Architectures
- Server Power Supplies
- High Density Power Modules
- General Purpose Low-Side Driver
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Tools & Simulations
LTspice
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
LTC4440
LTC4440-5
LTC4440A-5
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC4440EMS8E-5#PBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LTC4440EMS8E-5#TRPBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LTC4440ES6-5#TRMPBF | Material Declaration | Reliability Data | 6-Lead TSOT-23 | |
| LTC4440ES6-5#TRPBF | Material Declaration | Reliability Data | 6-Lead TSOT-23 | |
| Wafer Fabrication Data | R419 Reliability Data |
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