LT1766
PRODUCTION5.5V to 60V 1.5A, 200kHz Step-Down Switching Regulator
- Part Models
- 18
- 1ku List Price
- Starting From $5.54
Overview
- Wide Input Range: 5.5V to 60V
- 1.5A Peak Switch Current
- Constant 200kHz Switching Frequency
- Saturating Switch Design: 0.2Ω
- Peak Switch Current Rating Maintained Over Full Duty Cycle Range
- Low Effective Supply Current: 2.5mA
- Low Shutdown Current: 25μA
- 1.2V Feedback Reference Voltage (LT1766)
- 5V Fixed Output (LT1766-5)
- Easily Synchronizable
- Cycle-by-Cycle Current Limiting
- Small 16-Pin SSOP and Thermally Enhanced TSSOP Packages
The LT1766/LT1766-5 are 200kHz monolithic buck switching regulators that accept input voltages up to 60V. A high efficiency 1.5A, 0.2Ω switch is included on the die along with all the necessary oscillator, control and logic circuitry. A current mode control architecture delivers fast transient response and excellent loop stability.
Special design techniques and a new high voltage process achieve high efficiency over a wide input range. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch. Patented circuitry maintains peak switch current over the full duty cycle range. A shutdown pin reduces supply current to 25μA and the device can be externally synchronized from 228kHz to 700kHz with logic-level inputs.
The LT1766/LT1766-5 are available in a 16-pin fused-lead SSOP package or a TSSOP package with exposed backside for improved thermal performance.
Applications
- High Voltage, Industrial and Automotive
- Portable Computers
- Battery-Powered Systems
- Battery Chargers
- Distributed Power Systems
Documentation
Data Sheet 1
User Guide 2
Design Note 2
Technical Articles 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 |
|---|---|---|---|
| LT1766EFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT1766EFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT1766EFE-5#PBF | 16-Lead TSSOP w/ EP | ||
| LT1766EFE-5#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT1766EGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1766EGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1766EGN-5#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1766EGN-5#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1766HFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT1766HFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT1766IFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT1766IFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT1766IFE-5#PBF | 16-Lead TSSOP w/ EP | ||
| LT1766IFE-5#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT1766IGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1766IGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1766IGN-5#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1766IGN-5#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT1766EFE#PBF | PRODUCTION | |
| LT1766EFE#TRPBF | PRODUCTION | |
| LT1766EFE-5#PBF | PRODUCTION | |
| LT1766EFE-5#TRPBF | PRODUCTION | |
| LT1766HFE#PBF | PRODUCTION | |
| LT1766HFE#TRPBF | PRODUCTION | |
| LT1766IFE#PBF | PRODUCTION | |
| LT1766IFE#TRPBF | PRODUCTION | |
| LT1766IFE-5#PBF | PRODUCTION | |
| LT1766IFE-5#TRPBF | PRODUCTION | |
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LT1766EGN#PBF | PRODUCTION | |
| LT1766EGN#TRPBF | PRODUCTION | |
| LT1766EGN-5#PBF | PRODUCTION | |
| LT1766EGN-5#TRPBF | PRODUCTION | |
| LT1766IGN#PBF | PRODUCTION | |
| LT1766IGN#TRPBF | PRODUCTION | |
| LT1766IGN-5#PBF | PRODUCTION | |
| LT1766IGN-5#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LT1766EGN#PBF | PRODUCTION | |
| LT1766EGN#TRPBF | PRODUCTION | |
| LT1766EGN-5#PBF | PRODUCTION | |
| LT1766EGN-5#TRPBF | PRODUCTION | |
| LT1766IGN#PBF | PRODUCTION | |
| LT1766IGN#TRPBF | PRODUCTION | |
| LT1766IGN-5#PBF | PRODUCTION | |
| LT1766IGN-5#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LT1766EGN#PBF | PRODUCTION | |
| LT1766EGN#TRPBF | PRODUCTION | |
| LT1766EGN-5#PBF | PRODUCTION | |
| LT1766EGN-5#TRPBF | PRODUCTION | |
| LT1766IGN#PBF | PRODUCTION | |
| LT1766IGN#TRPBF | PRODUCTION | |
| LT1766IGN-5#PBF | PRODUCTION | |
| LT1766IGN-5#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:
- LT1766
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.
