LT3992
PRODUCTIONMonolithic Dual Tracking 3A Step-Down Switching Regulator
- Part Models
- 10
- 1ku List Price
- Starting From $7.01
Overview
- Wide Input Range:
- – Operation from 3V to 60V
- Independent Supply, Shutdown, Soft-Start, UVLO, Programmable Current Limit and Programmable Power Good for Each 3A Regulator
- Die Temperature Monitor
- Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2MHz with Synchronized Clock Output
- Independent Synchronized Switching Frequencies Optimize Component Size
- Antiphase Switching
- Outputs Can Be Paralleled
- Flexible Output Voltage Tracking
- Low Dropout: 95% Maximum Duty Cycle
- 5mm × 5mm QFN Package
- FMEA Compliant 38-Pin Exposed Pad TSSOP Package
The LT3992 is a dual current mode PWM step-down DC/DC converter with two internal 4.6A switches. Independent input voltage, shutdown, feedback, soft-start, UVLO current limit and comparator pins for each channel simplify complex power supply tracking and sequencing requirements.
To optimize efficiency and component size, both converters have a programmable maximum current limit and are synchronized to either a common external clock input, or a resistor settable fixed 250kHz to 2MHz internal oscillator. A frequency divider is provided for channel 1 to further optimize component size. At all frequencies, a 180° phase relationship between channels is maintained, reducing voltage ripple and component size. A clock output is available for synchronizing multiple regulators.
Minimum input to output voltage ratios are improved by allowing the switch to stay on through multiple clock cycles only switching off when the boost capacitor needs recharging. Independent channel operation can be programmed using the SHDN pin. Disabling both converters reduces the total quiescent current to <10μA.
Applications
- Automotive Supplies
- Distributed Supply Regulation
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LT3992EFE#PBF | 38-Lead TSSOP w/ EP | ||
| LT3992EFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LT3992EUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LT3992EUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LT3992HFE#PBF | 38-Lead TSSOP w/ EP | ||
| LT3992HFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LT3992IFE#PBF | 38-Lead TSSOP w/ EP | ||
| LT3992IFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LT3992IUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LT3992IUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LT3992EFE#PBF | PRODUCTION | |
| LT3992EFE#TRPBF | PRODUCTION | |
| LT3992HFE#PBF | PRODUCTION | |
| LT3992HFE#TRPBF | PRODUCTION | |
| LT3992IFE#PBF | PRODUCTION | |
| LT3992IFE#TRPBF | PRODUCTION | |
|
Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive) |
||
| LT3992EFE#PBF | PRODUCTION | |
| LT3992EFE#TRPBF | PRODUCTION | |
| LT3992EUH#PBF | PRODUCTION | |
| LT3992EUH#TRPBF | PRODUCTION | |
| LT3992HFE#PBF | PRODUCTION | |
| LT3992HFE#TRPBF | PRODUCTION | |
| LT3992IFE#PBF | PRODUCTION | |
| LT3992IFE#TRPBF | PRODUCTION | |
| LT3992IUH#PBF | PRODUCTION | |
| LT3992IUH#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT3992EFE#PBF | PRODUCTION | |
| LT3992EFE#TRPBF | PRODUCTION | |
| LT3992HFE#PBF | PRODUCTION | |
| LT3992HFE#TRPBF | PRODUCTION | |
| LT3992IFE#PBF | PRODUCTION | |
| LT3992IFE#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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|---|---|---|
| Circuit Monitors 1 | ||
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| LTC4359 | RECOMMENDED FOR NEW DESIGNS | Ideal Diode Controller with Reverse Input Protection |
| Switching Regulators & Controllers 1 | ||
| LTC3880 | RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3992
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
LT3992EFE Demo Board | Dual Buck with Tracking, 7V ≤ VIN ≤ 60V, VOUT1 = 5V @ 2A, VOUT2 = 3.3V @ 2A
Resources
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