LT1766 - 5.5V to 60V 1.5A, 200kHz Step-Down Switching Regulator
Features
- 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
AEC-Q100 data available for specific packages
Typical Application
Description
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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT1766EFE-5#PBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1766EFE-5#TRPBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1766EFE#PBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1766EFE#TRPBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1766EGN-5#PBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LT1766EGN-5#TRPBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LT1766EGN#PBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LT1766EGN#TRPBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LT1766HFE#PBF | TSSOP-16 | FE | H | 05-08-1663 (BB) | Yes |
| LT1766HFE#TRPBF | TSSOP-16 | FE | H | 05-08-1663 (BB) | Yes |
| LT1766IFE-5#PBF | TSSOP-16 | FE | I | 05-08-1663 (BB) | Yes |
| LT1766IFE-5#TRPBF | TSSOP-16 | FE | I | 05-08-1663 (BB) | Yes |
| LT1766IFE#PBF | TSSOP-16 | FE | I | 05-08-1663 (BB) | Yes |
| LT1766IFE#TRPBF | TSSOP-16 | FE | I | 05-08-1663 (BB) | Yes |
| LT1766IGN-5#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LT1766IGN-5#TRPBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LT1766IGN#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LT1766IGN#TRPBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT1766EFE-5#PBF | TSSOP-16 | E | $5.36 | $3.75 | Yes | |
| LT1766EFE-5#TRPBF | TSSOP-16 | E | $3.86 | Yes | ||
| LT1766EFE#PBF | TSSOP-16 | E | $5.36 | $3.75 | Yes | |
| LT1766EFE#TRPBF | TSSOP-16 | E | $3.86 | Yes | ||
| LT1766EGN-5#PBF | SSOP-16 | E | $4.32 | $3.65 | Yes | |
| LT1766EGN-5#TRPBF | SSOP-16 | E | $3.71 | Yes | ||
| LT1766EGN#PBF | SSOP-16 | E | $4.32 | $3.65 | Yes | |
| LT1766EGN#TRPBF | SSOP-16 | E | $3.71 | Yes | ||
| LT1766HFE#PBF | TSSOP-16 | H | $6.71 | $4.70 | Yes | |
| LT1766HFE#TRPBF | TSSOP-16 | H | $4.82 | Yes | ||
| LT1766IFE-5#PBF | TSSOP-16 | I | $6.36 | $4.45 | Yes | |
| LT1766IFE-5#TRPBF | TSSOP-16 | I | $4.57 | Yes | ||
| LT1766IFE#PBF | TSSOP-16 | I | $6.36 | $4.45 | Yes | |
| LT1766IFE#TRPBF | TSSOP-16 | I | $4.57 | Yes | ||
| LT1766IGN-5#PBF | SSOP-16 | I | $5.15 | $4.35 | Yes | |
| LT1766IGN-5#TRPBF | SSOP-16 | I | $4.41 | Yes | ||
| LT1766IGN#PBF | SSOP-16 | I | $5.15 | $4.35 | Yes | |
| LT1766IGN#TRPBF | SSOP-16 | I | $4.41 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC326B | LT1766EGN | 200KHz High Voltage Buck Converter, 5.5 - 60Vin @ up to 1A, Jmpr selectable 3.3 or 5Vout | $100.00 | |
| DC326C | LT1766EFE | 1.5A, 200kHz High Voltage Buck Converter, Vin = 6V-60V, Vout = 5V @ 1A | $100.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT1766HFE#PBF | TSSOP-16 | H | $6.71 | $4.70 | Yes | |
| LT1766HFE#TRPBF | TSSOP-16 | H | $4.82 | Yes | ||
| LT1766IFE-5#PBF | TSSOP-16 | I | $6.36 | $4.45 | Yes | |
| LT1766IFE-5#TRPBF | TSSOP-16 | I | $4.57 | Yes | ||
| LT1766IFE#PBF | TSSOP-16 | I | $6.36 | $4.45 | Yes | |
| LT1766IFE#TRPBF | TSSOP-16 | I | $4.57 | Yes | ||
| LT1766IGN-5#PBF | SSOP-16 | I | $5.15 | $4.35 | Yes | |
| LT1766IGN-5#TRPBF | SSOP-16 | I | $4.41 | Yes | ||
| LT1766IGN#PBF | SSOP-16 | I | $5.15 | $4.35 | Yes | |
| LT1766IGN#TRPBF | SSOP-16 | I | $4.41 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- High Voltage, Industrial and Automotive
- Portable Computers
- Battery-Powered Systems
- Battery Chargers
- Distributed Power Systems
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Design Tools
LTspice
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LT1766
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
