LT1776
PRODUCTIONWide Input Range, High Efficiency, Step-Down Switching Regulator
- Part Models
- 6
- 1ku List Price
- Starting From $4.48
Overview
- Wide Input Range: 7.4V to 40V
- Tolerates Input Transients to 60V
- 700mA Peak Switch Rating
- Adaptive Switch Drive Maintains Efficiency at High Load Without Pulse Skipping at Light Load
- True Current Mode Control
- 200kHz Fixed Operating Frequency
- Synchronizable to 400kHz
- Low Supply Current in Shutdown: 30µA
- Available in 8-Pin SO and PDIP Packages
The LT1776 is a wide input range, high efficiency Buck (step-down) switching regulator. The monolithic die includes all oscillator, control and protection circuitry. The part can accept input voltages as high as 60V and contains an output switch rated at 700mA peak current. Current mode control delivers excellent dynamic input supply rejection and short-circuit protection.
The LT1776 contains several features to enhance efficiency. The internal control circuitry is normally powered via the VCC pin, thereby minimizing power drawn directly from the VIN supply. The action of the LT1776 switch circuitry is also load dependent. At medium to high loads, the output switch circuitry maintains fast rise time for good efficiency. At light loads, rise time is deliberately reduced to avoid pulse skipping behavior.
The available SO-8 package and 200kHz switching frequency allow for minimal PC board area requirements.
Applications
- Automotive DC/DC Converters
- Cellular Phone Battery Charger Accessories
- IEEE 1394 Step-Down Converters
Documentation
Data Sheet 1
User Guide 1
Design Note 4
Technical Articles 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 |
|---|---|---|---|
| LT1776CN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1776CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1776CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1776IN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1776IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1776IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package |
||
| LT1776CN8#PBF | PRODUCTION | |
| LT1776IN8#PBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package |
||
| LT1776CN8#PBF | PRODUCTION | |
| LT1776IN8#PBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG] |
||
| LT1776CN8#PBF | PRODUCTION | |
| LT1776IN8#PBF | PRODUCTION | |
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LT1776CS8#PBF | PRODUCTION | |
| LT1776CS8#TRPBF | PRODUCTION | |
| LT1776IS8#PBF | PRODUCTION | |
| LT1776IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LT1776CS8#PBF | PRODUCTION | |
| LT1776CS8#TRPBF | PRODUCTION | |
| LT1776IS8#PBF | PRODUCTION | |
| LT1776IS8#TRPBF | PRODUCTION | |
|
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1776CS8#PBF | PRODUCTION | |
| LT1776CS8#TRPBF | PRODUCTION | |
| LT1776IS8#PBF | PRODUCTION | |
| LT1776IS8#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
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| Oscillators 1 | ||
| LTC6909 | PRODUCTION | 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation |
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| 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
Models for the following parts are available in LTspice:
- LT1776
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
LT1776CS8 | High Voltage, High Efficiency, Step-Down Switching Regulator, 7V to 60VIN, 3.3V and 5V @ 0.5A Out (Thru-hole Input Cap)
Resources
LT1776CS8 | High Voltage, High Efficiency, Step-Down Switching Regulator, 7V to 60VIN, 3.3V and 5V @ 0.5A Out (Thru-hole Input Cap)